{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_034.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1951 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"140"},{"label":"placed","value":"131"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef-snap 74, georef 56, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 10 panels"},{"label":"unplaced pages","value":"p101__2 (tier 1, 38.62856,-90.24667 +/-100m); p125 (tier 1, 38.62153,-90.26397 +/-247m); p127 (tier 2, 38.62230,-90.25962 +/-100m); p135 (tier 1, 38.62267,-90.25120 +/-126m); p15 (tier 1, 38.65512,-90.25765 +/-111m); p32__2 (tier 1, 38.65272,-90.25190 +/-100m); p87__2 (tier 1, 38.63548,-90.26469 +/-175m); p96__2 (tier 1, 38.63028,-90.24561 +/-100m); p98 (tier 1, 38.63168,-90.23920 +/-126m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0001","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1484.1,592.7 1479.7,642.9 1474.2,1141.8 1471.9,1817.1 815.0,1820.0 195.5,1824.2 196.8,1383.5 85.3,452.1 147.6,111.2 400.6,78.8 864.5,216.3 1332.7,269.9 1506.4,504.9 1510.1,504.9 1484.1,592.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[822.0,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2606348951915,38.65976011163661]}},{"type":"Feature","properties":{"resourceCoords":[1481.0,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25913014099534,38.659609909846694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0010","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1581.5,1640.3 1581.0,1322.3 1573.8,383.4 1534.0,382.0 1532.0,368.0 1534.0,333.0 1573.5,334.4 1573.0,279.9 1553.2,279.8 1533.6,121.7 1192.5,152.4 1024.8,263.7 76.1,259.5 10.8,309.4 2.4,1018.0 6.2,1018.0 1.0,1540.5 1.0,1639.0 205.5,1638.8 573.1,1639.5 1581.5,1640.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1576.0,1013.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23321001200064,38.64977673737755]}},{"type":"Feature","properties":{"resourceCoords":[1576.0,1651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23393610323645,38.648767434439264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.46"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0100","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.1,79.2 63.1,672.5 28.6,702.2 18.7,1435.5 35.0,1547.7 26.8,1770.7 20.8,1770.7 1.0,1813.9 1.0,1816.2 1570.3,1839.0 1570.9,1792.4 1610.8,1793.2 1608.4,1788.1 1616.7,914.4 1589.0,913.0 1589.0,892.0 1596.0,891.0 1591.0,890.0 1591.0,867.0 1617.2,864.9 1622.0,367.0 1595.9,368.4 1598.4,238.2 46.1,79.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1576.0,1232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23646590541082,38.62696711407154]}},{"type":"Feature","properties":{"resourceCoords":[1576.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2367750824497,38.6260092728985]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0101__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p101 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6448.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0101__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0101","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1082.1,1897.1 1079.2,1894.7 1611.0,1896.5 1571.8,1885.0 1580.3,303.6 538.6,241.0 530.7,257.4 491.1,256.5 319.7,594.5 258.3,594.5 178.3,897.0 242.4,898.2 193.5,1034.0 153.6,1141.1 111.3,1223.7 7.2,1404.4 1.0,1414.0 1.0,1802.7 471.9,1884.2 503.3,1884.0 643.5,1884.7 1002.8,1886.4 1015.4,1886.4 996.6,1936.6 1027.2,1934.4 1056.9,1932.2 1070.4,1894.5 1082.1,1897.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0101__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24581895594174,38.631362647575685]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24227109538903,38.63063820160105]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24338445041955,38.62726352257069]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24693231097227,38.62798796854533]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p102","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0102","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1448.5,1877.8 1570.5,1874.6 1576.6,1874.4 1579.7,1649.6 1560.7,1537.0 1553.8,797.9 1587.9,767.1 1557.0,169.7 1628.0,175.3 1628.0,161.8 1628.0,149.2 1497.3,9.1 1495.0,9.0 1494.7,6.2 1489.9,1.0 1425.9,1.0 1425.0,9.0 1235.0,13.0 1217.0,10.0 1215.2,1.0 1122.9,1.0 1122.0,9.0 1087.0,14.0 829.0,18.0 770.0,13.0 769.1,1.0 745.9,1.0 745.0,12.0 632.0,11.0 457.0,22.0 431.0,21.9 378.5,76.1 389.0,76.9 58.9,324.3 78.1,1888.2 117.9,1899.2 1445.4,1885.9 1445.8,1884.9 1448.5,1877.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1565.0,771.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23953746040242,38.62858941686946]}},{"type":"Feature","properties":{"resourceCoords":[1565.0,1879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24020292990748,38.626710256828986]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p103","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0103","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.4,1857.0 1353.0,1862.0 1404.2,1862.5 1611.0,1865.5 1611.0,93.0 1352.3,95.3 1352.0,47.3 1.0,81.2 1.0,422.2 40.4,800.6 53.8,913.0 58.0,913.0 61.0,928.0 58.5,952.8 75.4,1094.5 95.4,1297.1 100.8,1351.5 156.4,1857.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1353.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2579046,38.6299254]}},{"type":"Feature","properties":{"resourceCoords":[1353.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2585215,38.6281256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p104","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0104","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"595.0,1848.0 595.0,1862.2 595.0,1881.5 670.2,1848.5 986.5,1850.4 1297.0,1847.3 1335.6,1914.6 1502.8,1837.4 1620.0,1781.2 1620.0,1660.3 1505.3,1416.0 1494.1,1347.2 1493.8,761.9 1492.8,548.6 1490.7,77.0 1061.3,76.2 974.5,91.3 902.8,119.7 919.0,77.6 910.1,19.5 881.7,79.7 1.0,91.6 1.0,1842.5 559.4,1847.7 595.0,1848.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0104/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1494.0,810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2540103,38.6290823]}},{"type":"Feature","properties":{"resourceCoords":[595.0,1848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2566333,38.6277086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p105","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0105","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.0,375.9 338.0,253.0 320.6,215.0 316.9,207.0 437.4,207.4 683.3,95.4 752.4,85.0 1338.4,91.7 1528.3,93.0 1505.2,1856.6 1469.0,1856.5 1330.2,1855.9 1262.6,1855.6 1116.4,1852.7 1068.4,1861.4 813.9,1295.6 536.2,1419.2 533.5,1420.4 296.5,902.5 321.4,891.2 71.7,438.7 37.0,389.7 67.0,375.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1275.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2518614,38.6286171]}},{"type":"Feature","properties":{"resourceCoords":[338.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2542018,38.6273558]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0106","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"31.9,86.7 55.3,86.7 525.5,87.5 1164.7,87.3 1409.6,93.8 1541.5,91.0 1560.0,1841.7 1060.7,1840.7 809.1,1838.6 467.1,1839.5 43.6,1843.0 18.5,1843.1 31.9,86.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[508.0,1456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2505341949858,38.629689240229844]}},{"type":"Feature","properties":{"resourceCoords":[508.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25358980025133,38.63032488525152]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p107","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0107","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.2,738.5 33.5,185.5 78.2,177.7 915.8,183.2 1380.8,182.1 1467.1,170.9 1468.8,186.9 1527.0,685.5 1617.0,1457.9 1617.0,1701.6 598.3,1727.7 578.0,1710.4 508.9,1730.0 230.5,1737.2 64.2,738.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1544.0,1199.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26141939642737,38.62778509648071]}},{"type":"Feature","properties":{"resourceCoords":[1544.0,1716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26173462121778,38.62688885519703]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p108","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0108/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0108","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.1,889.1 155.8,532.3 133.0,28.0 308.1,28.0 410.9,37.7 482.2,26.4 500.3,46.2 1547.5,145.2 1545.9,404.4 1529.3,509.5 1525.5,717.8 1517.8,984.5 1519.1,1192.0 1517.3,1397.5 214.0,1455.8 214.8,1415.9 116.4,1417.1 118.2,1195.1 56.0,1196.0 64.1,889.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1519.0,1507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26202728761467,38.62446546433988]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2615269922001,38.62675652884476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p109","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0109/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0109","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.5,1468.4 377.8,1905.9 357.8,1658.7 338.9,1451.3 344.0,1345.1 317.4,1087.4 289.7,1087.9 292.3,843.0 210.3,66.3 1396.7,76.2 1392.9,826.9 1414.5,896.9 1160.9,1012.0 1266.9,1241.5 1368.5,1468.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0109/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26129595238717,38.62775642438021]}},{"type":"Feature","properties":{"resourceCoords":[1397.0,69.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25851658828196,38.628137991388286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0011","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.5,1335.3 116.8,284.6 96.7,284.5 77.7,125.2 537.4,83.5 817.8,183.8 1395.5,152.2 1485.8,273.3 1481.6,1013.8 1484.0,1165.6 1478.5,1334.4 1475.0,1653.8 866.0,1654.8 864.9,1675.8 818.5,1675.8 819.2,1655.0 118.4,1655.8 119.5,1335.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23229685844021,38.65148995225555]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.229036706616,38.650056165336444]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23121782076251,38.646988375852374]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23447797258672,38.64842216277148]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p110","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0110","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"454.8,1908.7 242.0,1458.0 139.6,1233.1 33.1,1006.4 283.7,890.8 261.8,821.5 261.0,78.0 311.2,78.4 1074.0,87.7 1109.4,88.1 1109.3,121.2 1108.9,269.0 1115.5,498.3 1138.8,575.1 1524.6,1405.5 454.8,1908.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[261.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2585215,38.6281256]}},{"type":"Feature","properties":{"resourceCoords":[242.0,1458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2593954,38.6257274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p111","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0111/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0111","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"111.4,1549.4 68.2,1549.0 69.6,1296.0 86.7,1228.2 163.7,1046.8 249.1,803.4 336.5,549.7 438.1,251.2 501.9,54.5 508.3,37.0 1588.0,51.1 1588.0,52.0 1591.0,553.6 1592.5,799.1 1591.7,1300.0 1588.0,1548.0 1598.0,1548.0 1589.4,1927.0 1571.2,1930.8 1552.2,1934.8 1567.2,1886.6 949.0,1932.1 424.2,1879.3 82.9,1700.8 111.4,1549.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1588.0,1548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2588087,38.6230813]}},{"type":"Feature","properties":{"resourceCoords":[1588.0,52.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2593954,38.6257274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p112","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0112","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1410.0,1893.9 210.8,1677.2 222.9,1197.2 212.9,1197.3 217.2,949.0 219.2,447.6 218.3,201.7 1409.7,199.2 1408.3,696.8 1407.0,1196.0 1410.3,1673.0 1409.0,1855.7 1410.0,1893.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0112/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[218.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2589955,38.6239646]}},{"type":"Feature","properties":{"resourceCoords":[1407.0,1196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25611,38.6234542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p113","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0113/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0113","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"403.4,17.5 455.7,19.1 485.8,20.1 771.4,158.6 1053.9,290.1 1059.8,367.7 1244.5,370.1 1385.0,369.8 1426.9,369.9 1424.5,668.2 1424.0,872.0 1420.3,1124.5 1416.6,1731.7 1412.0,1876.9 698.3,1868.9 223.4,1866.3 227.2,1367.9 234.3,444.0 246.2,363.9 339.2,151.9 403.4,17.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0113/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[231.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2566938,38.6260902]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2540035,38.6264704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p114","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0114/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0114","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1565.1,1767.4 251.9,1440.7 214.8,1473.2 211.9,1397.2 211.3,1212.9 202.8,731.6 198.6,227.9 677.1,223.1 1396.3,219.8 1393.8,531.7 1381.1,541.5 1628.0,970.4 1628.0,1269.0 1605.0,1271.0 1602.0,1300.0 1616.0,1301.0 1616.0,1318.0 1628.0,1319.0 1628.0,1724.0 1565.1,1767.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0114/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25592805447377,38.62263776322423]}},{"type":"Feature","properties":{"resourceCoords":[207.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25610396141256,38.62347228940946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p115","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0115/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0115","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.2,1032.7 290.7,433.3 347.6,184.4 384.0,15.7 442.7,17.3 444.8,17.4 963.3,90.1 957.2,117.1 1521.1,239.9 1466.2,467.1 1466.6,512.3 1588.6,843.0 1395.3,906.7 1547.3,1720.6 1220.0,1929.9 1176.0,1927.0 1098.0,1927.0 1023.0,1932.0 1022.0,1939.0 1016.0,1939.0 1015.0,1934.0 997.0,1934.0 996.0,1939.0 991.0,1935.0 740.0,1939.0 739.0,1948.0 736.0,1939.0 175.2,1939.0 36.9,1486.5 51.5,1479.8 124.0,1175.3 159.2,1032.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0115/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[237.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2538094,38.6255839]}},{"type":"Feature","properties":{"resourceCoords":[1361.0,918.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2512468,38.6259487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0116/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p116","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0116/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0116","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"759.0,413.8 1130.7,595.4 1217.7,592.0 1357.0,599.4 1548.2,597.6 1628.0,596.6 1628.0,711.1 1620.7,715.2 1505.8,780.3 1308.9,891.6 1206.6,944.2 810.0,1146.0 662.3,1241.9 268.8,1485.4 75.8,1196.5 65.1,1153.4 65.4,920.1 62.1,616.7 681.5,607.6 692.4,560.2 753.1,427.4 759.0,413.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0116/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[746.0,421.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25012291288076,38.62824626646504]}},{"type":"Feature","properties":{"resourceCoords":[1204.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24902314597051,38.62807721906128]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0117/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p117","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.65"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0117/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0117","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"95.2,1173.5 130.3,876.7 10.6,908.7 110.4,101.9 310.2,99.8 771.3,94.7 946.6,88.8 1388.9,121.0 1412.2,122.5 1503.2,128.8 1615.0,132.0 1568.5,144.1 1579.7,164.4 1540.8,178.3 1411.9,213.0 1408.2,1187.6 1438.1,1185.0 1493.7,1934.5 1289.0,1936.0 1184.0,1928.0 1101.0,1928.0 1024.0,1934.0 1023.0,1939.0 978.1,1939.0 79.6,1171.8 95.2,1173.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0117/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[309.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25082807021313,38.62621579708399]}},{"type":"Feature","properties":{"resourceCoords":[64.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2512620430409,38.6259322570716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0118/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p118","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0118/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0118","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"634.2,1.0 582.2,1.0 588.0,6.0 587.0,23.0 545.0,27.0 408.4,28.6 163.4,995.5 190.2,1000.0 193.8,1000.5 62.9,1762.2 1.0,1750.3 1.0,1844.1 33.0,1922.2 290.0,1923.6 1608.2,1614.3 1583.4,1551.3 1616.0,1460.0 1616.8,1458.0 1616.0,1458.0 1615.0,1446.0 1549.0,1448.0 1546.0,1392.0 1602.3,1391.2 1597.7,1379.3 1415.9,907.6 1404.2,878.0 1307.3,403.2 1345.7,388.1 1628.0,277.8 1628.0,235.1 1559.0,218.8 1541.0,214.6 1477.8,219.8 1397.0,201.9 1387.8,199.8 1259.9,170.9 1182.9,153.5 1000.0,106.6 871.6,69.1 741.9,31.9 634.2,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0118/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24930451303459,38.62678750037803]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24715861465572,38.62912002823391]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24361145670633,38.627100095194386]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.2457573550852,38.62476756733851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0119/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p119","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0119/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0119","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.1,1157.0 1.9,1384.0 65.0,1386.0 65.0,1410.0 56.5,1410.0 46.0,1440.0 9.0,1439.0 11.0,1538.0 9.0,1538.2 9.0,1541.5 11.0,1542.0 9.0,1624.0 3.4,1624.6 4.6,1782.5 9.0,1783.0 9.0,1823.0 4.9,1823.5 5.0,1839.5 11.0,1840.0 11.0,1857.0 5.2,1857.5 5.2,1866.1 269.3,1868.5 793.9,1863.5 875.4,1856.5 1023.1,1832.8 1139.1,1827.3 1396.3,1831.4 1467.8,1839.2 1568.1,1873.5 1613.0,1890.8 1613.0,64.1 1610.0,67.5 1547.8,139.3 1548.1,205.6 166.5,18.7 16.0,18.0 1.0,22.7 1.0,778.1 9.0,779.0 11.0,815.0 9.0,939.0 1.0,939.9 1.0,1150.2 1.1,1157.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0119/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24561595833575,38.624825599652006]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24466575016751,38.627626010822055]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24033689110739,38.62672964821322]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24128709927562,38.62392923704317]}},{"type":"Feature","properties":{"resourceCoords":[537.0,1154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2427367,38.6252266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p12","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0012","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.0,34.0 436.6,35.5 604.4,40.0 755.4,36.7 1491.7,36.5 1473.8,49.9 1532.2,153.8 1566.4,1322.8 1523.2,1868.6 124.0,1904.2 121.0,1906.3 118.3,1409.8 119.6,1161.2 117.5,927.6 119.0,554.5 119.0,34.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1501.0,924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2278256,38.6489783]}},{"type":"Feature","properties":{"resourceCoords":[119.0,34.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2311957,38.6475885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0120/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p120","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0120/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0120","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.3,1757.0 16.6,119.3 25.3,119.7 287.4,126.4 808.4,129.9 889.4,124.2 1036.5,103.0 1151.8,99.5 1407.1,107.7 1477.9,116.6 1577.0,152.2 1622.2,170.6 1628.0,173.0 1628.0,291.8 1584.5,271.7 1555.7,1812.3 1601.4,1813.1 1600.4,1852.2 1502.2,1898.5 72.4,1806.8 66.7,1814.6 46.3,1757.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0120/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1053.0,112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24091363633103,38.62578297957675]}},{"type":"Feature","properties":{"resourceCoords":[1580.0,1798.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23683395198795,38.625974689809894]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0121/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p121","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.33"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0121/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0121","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1605.4,937.6 1613.0,876.3 1613.0,292.8 434.7,420.8 446.4,410.9 257.9,187.2 1.0,659.8 1.0,1439.0 61.0,1440.0 62.0,1488.0 42.0,1488.0 38.0,1468.0 34.0,1470.0 32.0,1488.0 1.0,1487.0 1.0,1682.5 405.8,1891.4 1588.0,1868.7 1605.4,937.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0121/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25055083537133,38.62534082699375]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24678769806714,38.62498860144804]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24732829992051,38.62141332191792]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.2510914372247,38.62176554746363]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0122/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p122","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.56"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0122/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0122","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1373.0,1761.4 1350.3,1581.8 1345.6,1465.9 1523.9,567.5 1544.7,381.7 1554.1,90.5 1556.5,15.6 1456.4,14.3 1205.0,18.0 1194.0,15.0 1194.0,9.5 1193.3,9.5 1193.0,13.0 1137.0,14.0 1136.6,8.4 1055.6,6.8 1055.0,17.0 948.0,20.0 945.0,15.0 855.0,13.0 843.0,8.0 843.0,2.6 831.8,2.4 831.0,12.0 789.0,11.0 788.0,16.0 756.0,11.0 755.1,1.0 583.0,1.0 588.0,6.0 587.0,23.0 541.0,28.0 396.7,29.3 396.4,31.3 393.3,29.3 205.0,31.0 135.6,26.9 107.8,70.0 1.0,215.0 1.0,990.0 97.3,1917.7 325.4,1919.5 1377.8,1798.0 1373.0,1761.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0122/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1529.0,529.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24338875485945,38.623406740653046]}},{"type":"Feature","properties":{"resourceCoords":[1289.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24461694883472,38.621303630834525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0123/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p123","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0123/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0123","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"660.9,125.0 663.0,61.6 717.2,80.8 716.1,118.0 901.9,118.5 902.5,124.1 1145.0,123.0 1144.8,131.8 1506.4,120.5 1400.1,663.3 1296.2,663.0 1295.5,839.9 1418.0,1739.2 1060.0,1783.2 860.3,1807.8 470.1,1855.9 276.9,1891.0 251.1,1710.0 244.3,1593.1 409.2,683.0 427.1,495.1 432.9,125.2 660.9,125.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0123/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[414.0,650.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2433916,38.6233963]}},{"type":"Feature","properties":{"resourceCoords":[1145.0,123.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2414682,38.6239765]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0124/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p124","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0124/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0124","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1499.7,1693.1 1490.0,1562.3 1556.7,1556.8 1565.3,1599.2 1567.7,1558.7 1604.3,410.1 1584.8,74.9 1545.2,46.8 1487.8,68.2 206.3,113.1 103.0,651.1 1.0,651.2 1.0,833.6 124.5,1716.7 124.8,1717.7 1499.7,1693.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0124/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[14.0,648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24141354440583,38.622973374523966]}},{"type":"Feature","properties":{"resourceCoords":[1551.0,1668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23858741117333,38.620482007822574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0126/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p126","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0126/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0126","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1276.2,1662.0 1024.1,1651.4 1006.6,1650.7 747.4,1638.4 550.4,1616.3 480.1,1619.3 235.7,1690.7 247.8,1732.5 93.7,1748.6 180.3,1302.7 64.7,714.9 125.7,75.5 467.1,65.4 825.4,197.9 1218.8,113.0 1533.8,136.5 1549.3,203.2 1632.0,207.8 1632.0,270.3 1409.6,261.8 1407.9,360.4 1368.0,358.5 1386.6,1613.6 1387.4,1666.2 1276.2,1662.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0126/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1274.0,1658.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26204334786951,38.624460416963764]}},{"type":"Feature","properties":{"resourceCoords":[267.0,1658.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26231502487414,38.6226761218135]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0128/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p128","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0128/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0128","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.3,83.0 143.6,180.4 1364.1,71.7 1375.0,107.1 1418.3,259.4 1478.4,514.8 1541.0,738.0 1551.8,803.0 1512.7,1526.6 1530.1,1527.1 1488.7,1864.8 1291.2,1785.3 744.6,1791.4 84.5,1883.5 36.2,1450.5 85.3,100.3 119.3,83.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0128/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25891039196098,38.622579863456515]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25518357015754,38.62230452701006]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25559944706617,38.61881976193314]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25932626886961,38.619095098379596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0129/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p129","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0129/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0129","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"287.1,1730.7 310.9,998.3 298.7,932.9 231.1,708.4 165.2,451.4 118.5,298.4 145.2,256.9 1485.6,212.0 1487.2,701.8 1470.7,701.6 1467.2,963.7 1468.0,1481.8 1465.5,1707.1 1113.3,1754.8 306.0,1717.3 304.6,1730.8 287.1,1730.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0129/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[304.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2556281,38.6204957]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2529996,38.6202603]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0013","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.5,683.9 24.6,328.7 24.7,19.9 1211.0,42.5 1524.8,43.3 1564.2,647.1 1554.2,647.1 1564.7,1287.5 1573.2,1287.6 1527.6,1938.4 1520.0,1939.0 1519.0,1948.0 1447.0,1948.0 1446.0,1939.0 1310.0,1927.0 1193.0,1924.0 937.0,1932.0 731.0,1928.0 417.0,1935.0 80.3,1936.6 52.0,1922.4 48.3,1606.7 40.9,1280.9 28.5,683.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[691.0,633.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2613836380402,38.65557109777087]}},{"type":"Feature","properties":{"resourceCoords":[691.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25842017035279,38.655274409936304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0130/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p130","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0130/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0130","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.0,1684.4 188.5,1682.0 610.3,1766.2 1468.9,1692.3 1467.9,1456.3 1460.3,1201.8 1462.4,699.9 1473.2,699.9 1478.5,321.0 1211.3,182.3 862.0,1.0 586.9,1.0 586.0,14.0 567.0,17.0 203.8,21.9 244.7,162.7 196.7,221.5 184.1,222.1 188.1,701.0 172.0,701.0 169.9,957.3 173.3,1464.1 172.0,1684.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0130/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[172.0,1207.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2529996,38.6202603]}},{"type":"Feature","properties":{"resourceCoords":[172.0,701.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2528596,38.6211725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0131/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p131","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0131/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0131","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.6,225.9 1284.7,203.6 1284.9,193.0 1406.8,222.2 1395.2,707.0 1390.0,707.0 1388.3,955.5 1391.0,1220.8 1386.8,1474.8 1388.7,1667.1 1256.5,1734.4 263.9,1715.3 240.5,1717.2 239.8,1476.9 232.3,1218.0 235.0,707.0 246.0,707.0 251.8,321.3 68.6,225.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0131/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[235.0,707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2498818,38.6208955]}},{"type":"Feature","properties":{"resourceCoords":[1390.0,707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2472634,38.6206524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0132/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p132","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0132/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0132","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.4,1474.2 224.0,1221.0 223.7,956.4 227.6,708.6 232.7,708.7 248.8,225.3 1424.4,243.4 1424.4,206.2 1434.8,205.8 1426.8,1743.5 655.8,1745.2 304.3,1723.1 217.6,1666.0 217.4,1474.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0132/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[224.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2473994,38.6197421]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2446822,38.6195094]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0133/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p133","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0133/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0133","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"246.2,1744.6 244.4,197.6 431.2,190.3 1391.4,207.6 1378.5,1692.6 1249.0,1735.9 246.2,1744.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0133/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[234.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2446822,38.6195094]}},{"type":"Feature","properties":{"resourceCoords":[234.0,198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2444144,38.6213125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0134/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p134","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0134/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0134","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.2,587.9 1545.9,1667.0 1486.3,1709.2 1456.9,1709.4 1442.5,1740.2 224.5,1729.3 140.4,1682.2 137.8,225.0 1498.9,383.8 1506.7,253.3 1573.3,256.8 1568.2,354.5 1529.2,587.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0134/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[148.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.242067,38.619269]}},{"type":"Feature","properties":{"resourceCoords":[1540.0,255.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2385849,38.620684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0014","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1491.8,47.3 1494.6,646.7 1495.9,1282.3 1494.3,1578.8 1467.3,1662.9 1368.9,1900.9 1316.1,1929.5 1176.0,1924.0 1175.0,1928.0 906.0,1936.0 905.0,1948.0 869.0,1948.0 867.0,1935.0 817.0,1935.0 816.0,1948.0 600.0,1948.0 599.0,1933.0 582.0,1933.0 581.0,1948.0 574.0,1948.0 573.0,1933.0 556.0,1933.0 554.0,1934.0 532.0,1934.0 531.0,1948.0 357.0,1948.0 356.0,1931.0 194.0,1920.0 44.9,1919.2 91.7,1273.2 83.3,1273.1 74.6,638.4 84.5,638.4 47.0,39.8 1491.8,47.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[827.0,628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26089318839975,38.65853379731408]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,1277.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25916172405431,38.65962413471402]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0016","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1090.9,38.6 1398.2,44.1 1373.3,1701.0 1369.0,1757.9 1332.2,1839.3 1267.0,1877.4 1220.9,1930.1 1177.0,1929.0 927.0,1937.0 926.0,1948.0 868.0,1948.0 867.0,1936.0 827.0,1936.0 826.0,1948.0 757.1,1948.0 540.5,1853.2 269.8,1734.4 1.4,1619.8 176.7,1214.3 193.7,1115.6 203.9,242.6 210.7,13.3 380.0,17.0 390.4,16.4 528.0,18.8 560.4,19.9 845.5,29.9 1090.9,38.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[829.0,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25759177627565,38.651074270965815]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2574706435326,38.65205275426934]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0017","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.0,464.0 64.0,508.0 1.0,508.0 1.0,1934.0 121.3,1933.0 220.2,1852.5 223.1,1875.6 352.6,1860.0 377.2,1850.2 1614.4,1660.6 1599.2,516.6 1620.0,513.6 1620.0,343.3 568.9,74.4 333.4,14.5 292.0,16.0 1.0,12.0 1.0,460.1 66.0,464.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[143.0,1298.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25674768207668,38.65614609270677]}},{"type":"Feature","properties":{"resourceCoords":[203.0,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25693344647041,38.65518871870123]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0018","type":"ImageService3","width":1583,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.5,1611.5 37.0,1635.7 38.5,495.3 74.0,490.7 253.1,467.8 259.9,376.5 1189.1,628.1 1582.0,734.3 1582.0,957.6 1355.0,1805.6 1331.6,1893.2 1187.2,1873.6 1211.3,1902.7 209.7,1681.5 210.5,1611.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1475.0,1377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25032233948541,38.654647281086575]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24962223007168,38.65571344906792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p19","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0019","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1165.9,1753.2 1030.5,1760.0 641.6,1758.0 483.6,1752.4 189.4,1752.5 90.4,1756.4 89.5,1457.0 89.1,1306.9 86.6,430.2 28.3,215.0 35.8,215.0 86.0,215.0 1548.0,217.6 1551.0,1165.7 1550.0,1452.0 1555.2,1755.9 1555.2,1761.9 1375.5,1753.5 1165.9,1753.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1550.0,1452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.248051,38.6524286]}},{"type":"Feature","properties":{"resourceCoords":[86.0,215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2496024,38.6556734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0002","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"532.2,1490.0 444.5,1461.4 135.0,1458.0 142.6,775.8 152.2,271.9 157.0,221.2 183.9,132.7 378.6,131.9 947.5,292.7 1298.1,288.9 1409.8,519.8 1447.2,499.3 1453.3,688.6 1449.2,1024.0 1432.0,1864.0 1432.5,1923.1 1384.3,1923.8 960.0,1930.3 780.0,1594.1 532.2,1490.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[794.0,1600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2576979,38.6592248]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,1864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.256326,38.6586232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0020","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.1,1441.7 137.2,1152.8 144.1,195.8 1473.3,207.2 1470.9,569.5 1465.4,879.0 1461.7,1458.8 1455.5,1758.0 520.2,1749.7 367.8,1760.8 135.1,1754.7 135.2,1748.5 133.1,1441.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[140.0,867.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2474036999961,38.6533249242995]}},{"type":"Feature","properties":{"resourceCoords":[140.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24665866839104,38.65438620287779]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p21","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0021","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"236.7,1741.1 236.5,1723.4 239.1,1426.8 236.0,852.0 237.8,545.1 236.0,186.0 1258.9,187.0 1526.2,186.3 1516.5,851.1 1510.2,851.1 1493.1,1426.8 1425.0,1427.2 1427.6,1617.7 1428.4,1766.3 236.7,1741.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[236.0,852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2447525,38.6521653]}},{"type":"Feature","properties":{"resourceCoords":[236.0,186.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2439961,38.6532131]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p22","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0022","type":"ImageService3","width":1583,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"316.0,1779.6 985.0,1778.5 1519.0,1779.9 1514.0,1432.9 1516.0,850.0 1505.9,178.8 658.8,179.7 270.8,178.6 101.2,178.9 90.6,849.8 84.3,849.7 66.3,1430.7 1.0,1431.1 1.0,1777.0 316.0,1779.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[671.0,850.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2410127,38.6505216]}},{"type":"Feature","properties":{"resourceCoords":[1516.0,850.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2393247,38.6497805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p23","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0023","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"275.2,1437.8 279.0,858.0 271.1,190.3 801.1,192.9 1213.8,193.6 1513.8,195.1 1414.3,858.0 1425.2,858.0 1442.7,1441.8 1438.9,1441.8 1418.6,1793.5 1061.0,1793.3 279.0,1783.0 275.2,1437.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[279.0,858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2393247,38.6497805]}},{"type":"Feature","properties":{"resourceCoords":[279.0,1783.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.240363,38.6483272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p24","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0024","type":"ImageService3","width":1583,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.4,1782.3 172.0,1427.3 175.8,1427.3 158.2,838.0 147.2,838.0 247.6,168.9 319.0,169.3 1345.6,173.2 1344.3,839.6 1354.0,1431.0 1354.5,1737.7 1354.7,1783.2 357.6,1782.5 151.4,1782.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[867.0,171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2348643,38.6491984]}},{"type":"Feature","properties":{"resourceCoords":[1354.0,1431.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2352948,38.6468141]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p25","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0025","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1468.6,33.1 1513.9,32.8 1545.0,32.7 1526.2,1842.3 1512.2,1833.0 1335.0,1718.8 1259.3,1683.1 1181.8,1670.2 926.1,1671.8 506.8,1673.6 184.0,1675.0 185.6,1322.9 138.7,1323.8 136.7,1273.2 185.8,1271.5 191.2,41.4 1468.6,33.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[184.0,1675.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2338394,38.6428175]}},{"type":"Feature","properties":{"resourceCoords":[928.0,36.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2362859,38.6454173]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0026","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"36.0,1831.6 53.1,38.8 324.5,37.6 907.1,26.4 1563.7,25.9 1563.8,720.7 1543.0,720.0 1541.0,749.0 1543.0,766.0 1563.8,767.0 1564.1,1370.8 1563.5,1891.7 1283.1,1898.5 902.1,1894.1 614.2,1899.2 324.9,1883.3 110.9,1881.4 36.0,1831.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[328.0,868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23361354229614,38.64608396393981]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,33.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23393555815477,38.64872143832022]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0027","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"181.1,292.7 190.7,60.2 602.0,60.1 856.8,59.5 933.9,72.5 1009.2,108.3 1185.3,222.8 1274.3,282.5 1489.4,285.5 1491.4,431.4 1487.4,1016.8 1480.6,1791.7 1408.2,1853.2 595.6,1918.8 201.7,1888.9 172.8,1922.1 181.1,292.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[908.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23017965720159,38.64338113922565]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,307.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23153122660675,38.64514901934855]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0028","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.1,956.5 172.2,367.9 169.5,221.2 462.1,237.1 753.2,231.9 1138.4,236.2 1422.0,229.2 1420.2,606.9 1422.2,843.2 1420.7,1094.9 1423.0,1597.3 1315.0,1674.8 797.1,1784.3 263.2,1773.1 183.2,1723.0 168.1,1735.8 171.1,956.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1428.0,602.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.22939310746378,38.64680870303231]}},{"type":"Feature","properties":{"resourceCoords":[762.0,1722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2279038115701,38.64478802904682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p29","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0029","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1409.2,1784.2 1253.0,1779.6 611.2,1781.3 251.5,1799.2 182.0,1806.3 183.7,1721.4 206.8,1621.3 145.5,1341.2 127.2,565.7 207.6,541.7 221.1,164.5 537.3,169.9 901.1,172.0 1512.8,169.6 1491.0,1227.0 1484.1,1778.8 1484.1,1793.9 1409.2,1784.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[832.0,1227.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2618898,38.6524776]}},{"type":"Feature","properties":{"resourceCoords":[1491.0,1227.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2603819,38.6523467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0003","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"734.5,1640.8 436.3,864.1 314.7,555.1 238.4,383.8 288.2,322.6 589.3,293.0 723.5,210.0 1259.2,247.6 1373.5,330.1 1369.8,788.5 1368.0,1314.7 1363.4,1368.1 1360.1,1643.7 1116.9,1642.6 792.5,1720.8 774.0,1737.0 662.5,1932.2 536.2,1935.1 499.0,1827.7 342.6,1891.4 326.5,1878.0 757.0,1694.8 734.5,1640.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[429.0,844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25605130922266,38.660141715893275]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25505891368836,38.658059614953046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p30","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0030","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.8,1765.2 805.7,1763.3 1397.7,1757.7 1451.6,1761.3 1451.7,1757.2 1455.0,1511.6 1454.0,1204.0 1464.2,620.8 1470.8,110.0 1359.6,10.4 1159.0,9.0 1158.1,1.0 861.9,1.0 860.9,92.0 833.1,146.3 508.8,146.9 174.1,151.3 159.8,1211.8 156.8,1765.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2588837,38.6522223]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2574291,38.6520879]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p31","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0031","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"152.5,687.6 143.0,1197.0 129.5,1778.5 1608.2,1777.6 1595.0,1348.4 1589.0,1345.9 1592.3,733.5 1520.5,708.5 1508.7,707.1 1509.1,542.1 1559.5,176.0 1608.4,176.3 1634.0,176.4 1634.0,102.8 1634.0,80.9 1572.6,81.1 320.4,83.6 294.6,89.6 164.2,85.7 164.7,62.4 1.0,159.2 1.0,550.4 152.5,687.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[143.0,1197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2572485,38.6531241]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,1197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2551323,38.6529382]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0032__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p32 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6416.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0032__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0032","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"337.3,1765.9 419.9,1801.0 459.6,1865.4 546.2,1937.8 723.4,1936.0 1188.5,824.3 1305.1,545.5 1328.3,490.1 1185.8,451.6 1206.2,483.9 229.9,131.7 226.1,158.6 125.9,158.5 124.9,158.5 99.1,158.5 49.8,158.4 1.0,518.2 1.0,691.1 11.9,692.4 84.5,717.1 83.1,1330.9 89.1,1333.5 103.7,1763.6 279.9,1762.7 337.3,1765.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0032__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25381601977843,38.654956129042084]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25018205184287,38.654623652689175]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25069573663399,38.65115101003242]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25432970456954,38.65148348638533]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0033","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.7,1688.2 104.5,1926.7 1580.5,1920.2 1575.0,603.7 1568.4,308.2 1571.5,22.9 1408.8,15.2 1390.8,14.4 1180.1,14.2 1044.0,21.0 653.0,19.0 494.2,13.4 198.5,13.6 98.9,17.4 102.4,1217.8 1.0,1261.4 1.0,1455.4 103.7,1688.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[92.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25282904580617,38.65119797400046]}},{"type":"Feature","properties":{"resourceCoords":[92.0,609.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25202163589915,38.65232006306534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0034","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.0,1908.0 142.1,603.0 134.3,310.1 136.2,27.4 278.0,31.0 287.4,29.1 366.0,30.0 516.4,16.9 844.3,15.0 845.0,15.0 1439.7,11.5 1442.7,305.8 1447.5,599.1 1457.2,1356.3 1453.0,1611.7 1451.7,1905.3 153.0,1908.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1464.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24640091486563,38.64979662535641]}},{"type":"Feature","properties":{"resourceCoords":[138.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25052518829897,38.64899293259453]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0035","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"246.5,1619.8 249.6,1363.0 236.4,602.0 230.2,307.2 226.1,29.1 1419.3,45.5 1419.4,49.3 1430.5,580.3 1428.9,904.4 1436.2,1315.2 1444.9,1615.1 1458.0,1905.0 246.5,1914.9 246.5,1619.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[236.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2478797015933,38.64784460258029]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24546297275349,38.64676218850772]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0036","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1243.7,1926.8 1133.2,1917.0 528.4,1907.5 381.7,1915.2 157.6,1905.2 68.0,1907.9 68.0,1900.3 61.0,1611.5 58.7,1313.0 60.1,904.1 68.5,581.7 68.7,53.1 379.9,59.6 1040.3,66.8 1567.5,74.9 1566.8,326.5 1563.5,987.0 1559.0,987.0 1557.0,1032.0 1563.2,1032.1 1558.7,1922.1 1527.0,1923.4 1364.4,1921.0 1243.7,1926.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[68.0,605.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24400791294464,38.64878561035612]}},{"type":"Feature","properties":{"resourceCoords":[68.0,1905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24545330836051,38.64671670504758]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0037","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1044.3,54.4 1451.7,50.5 1406.5,579.9 1403.0,579.8 1408.7,896.8 1392.5,896.9 1421.4,1304.6 1444.8,1304.3 1456.1,1906.5 1395.5,1906.8 291.0,1913.3 267.4,305.4 263.1,52.2 1044.3,54.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,1896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24244292500175,38.645430951134756]}},{"type":"Feature","properties":{"resourceCoords":[278.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24033977223864,38.648304774745256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0038","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1017.8,1894.8 212.6,1888.5 209.7,1289.6 186.4,1289.6 163.2,883.9 179.3,884.0 178.0,568.8 181.5,568.9 233.7,43.2 386.8,43.9 1368.0,48.0 1369.4,1312.1 1364.3,1603.8 1370.0,1897.6 1017.8,1894.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1368.0,583.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2362859,38.6454173]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,48.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2356851,38.6462652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0039","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"111.8,118.7 181.2,106.9 541.2,64.8 1185.8,19.9 1343.0,14.0 1351.0,18.0 1418.9,18.8 1421.6,60.5 1460.1,637.9 1523.8,1686.4 1537.3,1894.6 194.5,1701.7 215.6,1769.2 152.6,1714.1 133.0,1433.7 70.3,1383.6 126.7,1227.7 133.2,451.4 77.0,223.6 107.8,33.4 111.8,118.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1478.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26067667874233,38.65015048955774]}},{"type":"Feature","properties":{"resourceCoords":[1478.0,75.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2604315521307,38.65121755022412]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p4","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0004","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.0,1350.9 108.4,1297.7 108.2,772.6 110.2,315.2 504.6,146.0 1191.4,208.0 1282.9,156.8 1323.1,228.7 1385.5,233.0 1406.1,256.6 1380.8,991.0 1392.5,990.9 1356.0,1628.7 1390.8,1628.8 1407.9,1718.9 1240.6,1787.7 1227.8,1793.0 1185.1,1628.5 101.7,1625.9 104.0,1350.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[999.0,994.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2525521,38.6582774]}},{"type":"Feature","properties":{"resourceCoords":[109.0,994.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2543436,38.6590602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0040","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"154.1,1871.4 40.5,1516.5 42.3,125.2 31.9,117.6 5.1,53.3 1341.1,120.8 1346.3,153.7 1500.9,1133.3 1560.2,1518.7 1609.0,1834.8 1609.0,1861.5 1609.0,1913.7 1579.0,1914.3 1043.9,1923.2 963.6,1888.8 910.5,1893.4 845.6,1923.5 336.2,1922.0 154.1,1871.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1499.0,1142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26131081180223,38.64614111433829]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1907.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26159340863788,38.644764547976365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0041","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.8,1700.6 175.0,656.1 172.8,80.8 172.6,24.2 820.4,24.3 929.7,23.6 942.0,24.0 978.3,23.3 1411.3,20.5 1465.1,24.2 1460.4,304.9 1459.9,337.3 1460.8,485.2 1460.1,654.3 1462.8,880.9 1447.9,952.5 1217.8,1480.7 1225.2,1483.8 1114.8,1748.6 1032.6,1937.8 997.0,1939.0 996.0,1948.0 864.8,1948.0 466.0,1783.6 316.1,1752.2 172.9,1731.2 172.8,1700.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[169.0,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26070987000477,38.650254880745]}},{"type":"Feature","properties":{"resourceCoords":[1222.0,1489.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25852612634289,38.648532269678405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p42","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0042","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1540.6,1916.7 1540.0,765.0 1539.1,406.1 1541.2,26.4 1098.8,28.6 1001.4,52.8 196.2,394.3 1.0,473.1 1.0,522.1 72.8,689.1 86.7,761.2 77.2,1339.0 85.3,1339.0 85.2,1626.7 80.9,1907.5 590.6,1916.6 1540.6,1916.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1540.0,1341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2556075,38.6472675]}},{"type":"Feature","properties":{"resourceCoords":[1540.0,765.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2549635,38.6481681]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p43","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0043","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"606.6,1645.2 72.5,1645.4 70.3,1284.1 71.0,902.0 67.2,607.9 66.3,309.8 1557.6,301.8 1559.4,605.7 1554.2,903.5 1550.5,1352.3 1553.0,1645.0 606.6,1645.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[71.0,902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2541353,38.6493219]}},{"type":"Feature","properties":{"resourceCoords":[1553.0,1645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2520243,38.6468758]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p44","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0044","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1451.5,295.9 1466.2,1501.1 1485.5,1501.3 1484.8,1552.0 1466.8,1552.0 1467.8,1629.2 1275.9,1629.9 142.0,1634.0 138.5,1343.1 140.7,897.0 144.8,601.0 142.0,299.0 1451.5,295.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2520243,38.6468758]}},{"type":"Feature","properties":{"resourceCoords":[142.0,299.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2505132,38.6489542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0045","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"44.9,1336.2 44.3,1260.0 62.0,1260.0 63.0,1210.0 43.9,1209.7 34.9,19.0 40.8,19.0 922.1,19.6 1018.0,22.0 1083.2,19.7 1246.9,19.8 1250.4,316.8 1248.7,614.4 1562.5,612.2 1601.4,1912.3 1554.2,1912.3 765.3,1911.7 683.3,1933.4 605.0,1933.0 525.4,1936.0 525.4,1911.4 526.7,1634.8 504.0,1514.3 454.0,1398.1 419.3,1336.5 259.3,1336.4 258.4,1376.7 210.5,1366.7 210.5,1336.3 49.0,1336.2 44.9,1336.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24902667683449,38.64437978260576]}},{"type":"Feature","properties":{"resourceCoords":[1249.0,40.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24546683598845,38.646690501670854]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0046","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.2,1915.9 364.9,612.1 50.1,616.0 50.2,317.6 45.1,27.4 135.0,23.0 360.0,29.0 452.0,26.0 507.1,18.6 1114.0,17.3 1225.0,25.0 1312.0,23.0 1346.0,17.0 1541.0,21.4 1541.6,64.3 1550.0,644.8 1556.5,1332.8 1565.3,1910.1 883.0,1914.6 876.3,1935.9 811.0,1933.7 794.5,1933.1 790.2,1916.3 412.9,1915.9 411.2,1915.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1556.0,1905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24456787983189,38.64241315145026]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,35.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24242774182242,38.64534963539032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p47","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0047","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.1,288.3 1382.4,294.4 1433.4,294.8 1489.9,890.9 1518.9,891.0 1505.5,1633.9 301.2,1627.2 266.0,1627.0 266.1,927.3 263.3,337.1 263.1,288.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[266.0,885.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.243091,38.6444633]}},{"type":"Feature","properties":{"resourceCoords":[266.0,1627.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.243912,38.6433112]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p48","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0048","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1370.5,1386.1 1370.0,1623.0 890.8,1618.9 255.3,1613.4 270.9,875.7 242.1,875.4 187.8,283.2 1013.4,290.2 1370.0,293.3 1370.6,1314.8 1370.5,1386.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1370.0,885.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2384136,38.6424055]}},{"type":"Feature","properties":{"resourceCoords":[1370.0,1623.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2392312,38.6412498]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p49","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0049","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.2,139.4 20.6,887.1 1.0,902.4 1.0,907.1 126.3,1405.0 237.4,1845.0 1288.9,1825.3 1288.8,1824.0 1289.0,1794.0 1599.6,1794.7 1604.6,1794.7 1591.9,137.9 1536.0,138.0 1298.2,137.7 39.2,139.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1289.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2359365,38.6398044]}},{"type":"Feature","properties":{"resourceCoords":[135.0,139.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2405154,38.6394357]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0005","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1514.7,1640.9 1096.8,1638.4 126.3,1632.1 91.2,1631.9 130.9,990.1 119.2,990.2 148.2,251.3 127.5,227.4 271.1,237.9 595.5,170.3 1157.5,221.1 1263.7,179.6 1310.4,248.4 1566.8,327.7 1565.4,1641.2 1514.7,1640.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[702.0,1000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25062227770009,38.65742590064144]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,1638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24957160436539,38.65566666290156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0050","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"22.5,1789.2 3.4,159.9 19.0,159.9 1027.5,153.8 1321.1,146.7 1612.8,150.4 1606.6,1367.3 1558.0,1369.0 1560.0,1419.0 1606.3,1418.2 1604.6,1766.5 1021.5,1769.5 735.9,1773.0 440.6,1795.1 244.7,1817.4 183.4,1794.4 95.3,1788.8 22.5,1789.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1060.0,1799.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23439057879496,38.641927520826464]}},{"type":"Feature","properties":{"resourceCoords":[458.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23845366484369,38.642453539133804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p51 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.31"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6120.0"},{"label":"split_canvas_w","value":"1330.4"},{"label":"split_canvas_h","value":"1676.0"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.7,1917.1 51.6,1927.9 61.5,1931.8 95.0,1933.4 105.7,1920.5 167.2,1818.8 167.9,1802.0 165.6,1778.2 133.4,1668.6 124.2,1647.9 92.2,1612.6 53.4,1580.3 49.6,1590.2 43.7,1725.0 38.7,1917.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1530.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23366296855693,38.637398425404385]}},{"type":"Feature","properties":{"resourceCoords":[332.6,1530.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23335431559488,38.63794622881891]}},{"type":"Feature","properties":{"resourceCoords":[332.6,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23247804885177,38.63764073780934]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23278670181382,38.637092934394815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p51 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6484.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.0,1533.1 254.7,1604.5 339.2,1926.8 341.8,1935.9 1589.1,1919.9 1593.0,1919.0 1599.6,1919.7 1620.0,1919.5 1620.0,1898.7 1599.4,1898.6 1615.8,1842.3 1619.3,1717.8 1612.5,62.0 1418.5,85.3 1357.7,62.9 1270.4,57.8 1193.4,58.6 890.8,61.0 890.9,90.2 890.9,91.5 1.0,117.0 1.0,635.8 110.1,1051.6 235.9,1533.1 238.0,1533.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0051__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[314.0,407.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23589826693811,38.63857464652489]}},{"type":"Feature","properties":{"resourceCoords":[902.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23219466961854,38.6381696285505]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0052","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"382.3,45.9 666.3,42.6 1246.3,39.9 1563.8,38.9 1570.1,38.9 1561.3,268.4 1557.4,1877.7 1529.2,1910.4 1214.9,1924.9 333.9,1930.6 228.0,1924.0 85.2,1924.6 85.2,1911.3 63.6,1911.1 80.5,1854.8 84.8,1729.8 88.5,67.8 382.3,45.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1004.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23034389874098,38.640785665490675]}},{"type":"Feature","properties":{"resourceCoords":[78.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23139783780815,38.63931291824093]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0053","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"254.0,15.9 397.0,13.0 548.3,18.9 964.0,113.7 1091.8,92.2 1125.8,76.2 1108.3,146.9 1595.5,269.1 1517.8,591.4 1382.0,1173.2 1468.4,1171.1 1390.8,1948.0 1387.4,1948.0 1358.0,1939.0 1229.0,1934.0 1030.0,1939.0 1029.0,1948.0 864.0,1948.0 863.0,1939.0 765.0,1932.0 577.7,1936.1 576.0,1925.7 518.1,1578.6 454.5,1195.3 288.9,221.0 254.0,15.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[358.0,566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26111015228217,38.64730295858674]}},{"type":"Feature","properties":{"resourceCoords":[1505.0,739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2586578097955,38.646421737851625]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p54","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0054","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1216.1,1930.0 1210.0,1930.0 1147.2,1932.0 225.8,1909.0 339.8,1131.0 253.4,1129.1 415.6,554.8 507.9,236.7 1408.3,489.5 1297.5,885.4 1244.5,1074.6 1237.0,1151.0 1217.5,1878.8 1216.1,1930.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[380.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2586832,38.6464648]}},{"type":"Feature","properties":{"resourceCoords":[1237.0,1151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2569976,38.6452694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0055","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1537.8 1.0,1790.4 717.3,1791.7 805.9,1791.9 1302.6,1794.1 1505.5,1793.2 1591.1,1793.3 1597.5,1712.1 1599.5,1703.0 1591.7,1700.5 1594.9,1260.5 1596.1,1091.2 1603.5,586.2 1609.5,161.6 880.1,154.2 828.9,153.7 825.5,111.7 9.9,91.1 9.2,149.2 4.3,1114.5 1.5,1478.1 40.0,1480.0 41.0,1498.0 33.0,1502.0 53.0,1500.0 52.0,1526.0 1.1,1525.0 1.0,1537.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,1800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25377706219552,38.643108408259266]}},{"type":"Feature","properties":{"resourceCoords":[803.0,143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25750756984868,38.64385957934]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0056","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,1847.4 39.9,1833.1 38.5,1647.8 35.2,1230.0 26.6,78.0 1460.4,72.9 1539.4,1069.2 1516.5,981.8 1495.3,1079.8 1491.3,1231.1 1552.2,1231.3 1575.5,1525.6 1566.0,1526.0 1565.7,1534.3 1134.0,1647.6 968.0,1691.2 599.9,1785.0 471.6,1817.7 54.2,1924.1 40.0,1847.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[50.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25622167492405,38.64635228542144]}},{"type":"Feature","properties":{"resourceCoords":[50.0,652.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25556643741703,38.64725379221616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p57","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0057","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.3,1367.2 105.6,128.1 835.7,127.1 926.0,127.0 1432.2,127.7 1539.2,126.8 1244.3,1794.3 726.9,1792.5 104.0,1792.0 98.4,1792.0 104.3,1367.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[926.0,127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2537937,38.6431172]}},{"type":"Feature","properties":{"resourceCoords":[104.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2505923,38.6409501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0058","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1606.9,105.2 1606.5,1422.1 1606.4,1584.0 1576.0,1584.0 1570.0,1612.8 1566.0,1616.0 1566.0,1632.0 1606.4,1632.9 1606.4,1793.3 1544.7,1828.1 1428.2,1878.3 1307.5,1901.1 1030.2,1899.9 747.1,1900.8 460.6,1898.7 402.8,1902.8 278.0,1928.0 138.1,1929.0 4.8,304.5 99.7,278.8 182.8,256.9 162.1,176.8 459.5,154.4 460.0,94.2 609.8,98.7 706.8,120.0 620.0,142.3 1606.9,68.0 1606.9,105.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1030.0,1902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24905375313874,38.644373825113234]}},{"type":"Feature","properties":{"resourceCoords":[1582.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25206900499786,38.64684380914555]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0059","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1206.4,1916.3 1160.5,1915.6 1052.0,1913.8 872.5,1914.8 806.0,1930.5 771.2,1930.2 734.0,1928.0 629.0,1928.0 612.2,1929.0 221.4,1925.8 223.8,1315.8 227.2,809.2 189.2,802.4 223.9,667.8 231.6,541.6 242.5,485.0 317.7,210.4 368.8,16.1 375.0,16.0 696.6,20.4 1379.3,202.2 1426.4,214.8 1353.2,480.1 1332.6,551.4 1303.7,780.4 1262.0,812.7 1253.6,850.1 1252.5,1081.4 1252.0,1190.2 1251.6,1275.6 1248.2,1916.6 1206.4,1916.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[217.0,1327.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25025402821208,38.64200725230998]}},{"type":"Feature","properties":{"resourceCoords":[1266.0,1896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2482182913326,38.64052791854232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0006","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"55.5,1639.9 51.1,330.6 111.0,248.2 820.9,255.8 1217.5,180.3 1469.4,246.0 1523.2,328.9 1526.8,1645.4 55.5,1639.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[55.0,1010.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24889652006965,38.65666103150608]}},{"type":"Feature","properties":{"resourceCoords":[1524.0,1010.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24594827727674,38.65537349555809]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0060","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1296.0,1872.5 1296.1,1926.5 1116.0,1924.0 1035.5,1927.5 627.5,1928.4 568.1,1911.7 179.7,1911.9 176.6,1271.0 175.5,1076.8 174.3,845.5 182.3,808.0 223.7,775.3 250.3,545.8 270.1,474.6 340.6,208.5 702.9,303.4 702.8,320.6 780.7,343.8 792.5,325.0 1449.0,491.6 1297.8,1080.1 1293.8,1133.0 1295.1,1608.3 1296.0,1872.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[172.0,1902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24828165811252,38.64052069128222]}},{"type":"Feature","properties":{"resourceCoords":[1304.0,1902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24573418156669,38.63998612542223]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0061","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"249.5,45.2 284.2,45.3 1438.5,48.6 1447.8,1197.0 1380.8,1197.0 1376.2,1836.7 1314.6,1852.4 996.8,1933.7 867.0,1936.0 706.0,1927.0 628.0,1928.0 627.1,1932.4 545.0,1938.0 517.0,1933.0 425.8,1933.5 380.8,1758.4 261.4,1292.6 252.2,1239.7 254.3,625.0 249.5,45.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[260.0,1201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24519198097691,38.6414877097453]}},{"type":"Feature","properties":{"resourceCoords":[260.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2439097480313,38.643275620432696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0062","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1423.7,1372.3 1383.4,1383.4 1384.5,1454.2 1385.4,1516.5 622.0,1717.3 364.0,1783.7 283.9,1804.3 167.2,1834.8 166.8,1835.0 167.9,1192.7 235.2,1192.3 219.7,39.5 889.5,37.8 1368.0,36.5 1381.9,1288.4 1627.0,1292.2 1618.9,1329.5 1423.7,1372.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1380.0,1547.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24091695240935,38.638884611415634]}},{"type":"Feature","properties":{"resourceCoords":[1380.0,35.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23920547621582,38.64124158239283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p63","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0063","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"158.8,1771.5 26.4,1052.8 45.8,118.0 18.4,109.4 538.1,129.4 605.3,101.0 659.7,98.2 740.3,136.3 1286.7,146.5 1317.2,146.9 1324.1,100.2 1326.8,124.2 1615.0,137.8 1615.0,1008.5 1613.7,1818.2 1568.9,1816.8 1525.5,1815.2 1121.2,1801.1 158.2,1775.4 158.8,1771.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[943.0,140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2623649,38.6449069]}},{"type":"Feature","properties":{"resourceCoords":[1033.0,966.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2626014,38.6434443]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0064","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1557.7,1783.4 1552.6,960.9 1493.1,961.0 1503.9,125.6 1503.0,125.7 529.7,130.9 530.4,125.5 497.0,114.7 364.9,107.5 160.9,109.4 159.7,118.6 1.0,116.2 1.0,528.3 15.6,987.6 39.9,1797.3 310.0,1797.0 642.4,1794.0 742.2,1790.6 1557.7,1783.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[29.0,1800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26179290526868,38.6417349618837]}},{"type":"Feature","properties":{"resourceCoords":[1559.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2579458434035,38.64244238195378]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0065","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.0,1589.4 147.2,1308.3 42.1,415.6 80.0,146.7 1028.6,156.3 1426.9,163.6 1439.2,163.8 1438.7,251.8 1538.8,1004.4 1615.0,1529.8 1615.0,1713.3 240.8,1732.3 116.2,1726.5 101.0,1589.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1020.0,158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26286684641802,38.6419675435551]}},{"type":"Feature","properties":{"resourceCoords":[1145.0,969.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2630517567366,38.640496146582265]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0066","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"258.9,1777.7 261.6,1810.6 428.8,1794.2 455.4,1785.0 593.1,1781.8 879.3,1743.8 1568.4,1746.6 1563.4,1302.5 1561.5,953.5 1561.7,914.1 1563.8,157.6 763.6,157.3 665.6,159.7 339.4,159.7 30.4,157.2 1.0,156.8 1.0,251.8 104.3,994.1 183.4,1517.4 185.5,1700.3 209.1,1699.8 213.9,1741.7 256.1,1742.0 258.9,1777.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5.0,166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2619277404058,38.6417516386284]}},{"type":"Feature","properties":{"resourceCoords":[1562.0,967.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25891342601854,38.639636763306534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0067","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1228.3,143.5 1577.9,144.1 1596.3,144.3 1594.5,351.2 1600.1,361.8 1589.2,1118.3 1579.7,1790.0 1212.0,1790.8 909.2,1788.2 712.2,1775.8 323.4,1771.3 203.6,1779.0 83.9,1815.6 72.0,1821.9 72.0,1821.0 71.3,1821.0 68.7,1817.6 72.0,1817.0 71.0,1796.0 52.3,1796.3 69.8,409.8 75.8,226.1 78.2,157.3 296.6,144.5 783.3,145.4 1228.3,143.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[848.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25563048569133,38.637648838111325]}},{"type":"Feature","properties":{"resourceCoords":[848.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25935254925031,38.638390428767046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0068","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.1,129.7 1618.8,1105.2 1621.4,1626.8 1623.0,1788.2 1562.8,1789.0 756.6,1797.8 403.9,1790.1 52.8,1790.8 28.2,1791.0 25.2,1116.6 24.4,357.0 18.6,346.5 17.2,138.8 38.4,138.6 799.3,134.2 1611.1,129.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25471619447066,38.640287882489936]}},{"type":"Feature","properties":{"resourceCoords":[813.0,121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25845501547049,38.641081108053]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0069","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.8,195.2 190.7,153.8 310.8,141.6 701.8,131.3 900.3,136.2 1204.7,127.3 1574.2,112.6 1579.0,112.4 1598.0,1498.6 1615.0,1516.9 1615.0,1556.9 1615.0,1592.8 1599.4,1598.7 1601.8,1772.5 1594.5,1772.7 889.8,1796.2 750.1,1802.2 73.4,1820.9 62.7,1321.3 61.9,1281.3 56.5,1023.7 55.6,983.1 54.4,925.6 50.3,732.6 47.5,601.1 42.0,312.9 41.7,295.8 40.1,213.4 71.8,195.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[850.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25565286805319,38.63767466229843]}},{"type":"Feature","properties":{"resourceCoords":[89.0,1796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25248202325793,38.63551879159757]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p7","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0007","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.0,306.0 1461.2,302.2 1449.3,310.0 1500.8,401.9 1529.8,1101.4 1530.8,1609.5 1518.4,1631.7 142.0,1634.0 142.0,306.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2439961,38.6532131]}},{"type":"Feature","properties":{"resourceCoords":[142.0,306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2466558,38.6543751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0070","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.9,145.8 390.1,143.7 742.0,149.8 1546.1,137.7 1607.2,136.7 1623.0,1362.3 1623.0,1459.7 1623.0,1782.5 1567.2,1783.2 56.9,1798.8 10.7,1799.1 11.5,1626.0 27.1,1620.5 28.5,1544.9 11.9,1526.4 17.9,146.1 39.9,145.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,1806.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25104693414954,38.63950528477459]}},{"type":"Feature","properties":{"resourceCoords":[36.0,124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25525708886927,38.63898000977896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p71","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0071","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"860.0,148.8 927.0,132.5 1107.8,130.3 1263.4,131.7 1305.6,131.7 1293.2,171.9 1351.7,1771.8 1093.0,1772.7 580.0,1773.5 488.6,1749.0 401.6,1749.3 271.0,1769.0 271.2,1715.7 271.0,209.2 271.0,148.0 860.0,148.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[271.0,1769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.251553,38.6381202]}},{"type":"Feature","properties":{"resourceCoords":[271.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2505923,38.6409501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p72","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0072","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1370.0,1773.0 1332.9,1773.0 1236.2,1749.2 1139.3,1749.7 1041.5,1769.1 568.4,1770.8 278.9,1771.9 219.1,156.3 231.5,115.7 626.8,116.5 687.2,133.7 1102.3,134.0 1184.3,130.6 1367.5,134.2 1370.0,1773.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[232.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2482812,38.6404643]}},{"type":"Feature","properties":{"resourceCoords":[1370.0,1773.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2467253,38.6371119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p73","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0073","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1123.7,1781.3 246.0,1776.0 258.2,143.1 258.8,87.8 259.4,16.4 348.0,24.1 373.8,36.2 532.6,67.0 686.3,117.2 812.6,148.3 1141.4,151.5 1205.7,152.1 1326.1,153.3 1355.8,153.7 1337.2,980.2 1359.0,980.4 1335.5,1782.7 1123.7,1781.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[252.0,971.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.246253,38.638509]}},{"type":"Feature","properties":{"resourceCoords":[246.0,1776.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2467253,38.6371119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p74","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0074","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1336.8,1784.3 519.3,1785.8 275.8,1786.3 292.9,975.6 270.9,975.5 283.0,140.2 336.4,140.6 605.1,141.9 1401.5,141.8 1385.9,250.5 1383.7,922.4 1384.0,1782.0 1336.8,1784.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1384.0,976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2413957,38.6375029]}},{"type":"Feature","properties":{"resourceCoords":[1384.0,1782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2418648,38.6361188]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p75","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0075","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"281.6,920.8 283.0,253.9 298.4,146.0 313.2,85.5 330.1,16.6 372.0,16.0 572.0,24.0 623.0,22.0 693.6,18.9 1070.3,123.5 1070.5,147.3 1321.9,147.2 1344.0,1776.2 927.2,1775.3 283.0,1774.0 281.6,920.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[282.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2413957,38.6375029]}},{"type":"Feature","properties":{"resourceCoords":[283.0,1774.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2418648,38.6361188]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p76","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0076","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"335.9,1763.7 319.1,141.2 592.2,142.0 1042.3,142.9 1073.3,10.8 1367.8,88.8 1353.0,144.0 1378.0,144.3 1361.0,1769.1 1337.0,1769.0 338.6,1763.7 335.9,1763.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1337.0,1769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2372924,38.6351605]}},{"type":"Feature","properties":{"resourceCoords":[1353.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2363072,38.6379776]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p77","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0077","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"253.7,1040.5 252.2,900.6 251.0,195.0 382.7,175.7 470.4,175.7 562.4,200.5 1079.3,201.5 1436.4,201.6 1301.2,904.4 1361.2,904.8 1384.2,993.0 1409.4,993.1 1392.3,1726.8 1148.1,1724.9 251.0,1718.0 253.7,1040.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[251.0,1718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2524373,38.6354793]}},{"type":"Feature","properties":{"resourceCoords":[251.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.251553,38.6381202]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p78","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0078","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1344.6,1738.2 1184.5,1737.7 327.8,1735.0 341.8,989.5 316.2,989.5 292.4,900.0 231.4,899.9 365.6,185.2 561.2,184.3 1041.0,182.2 1140.1,162.5 1238.3,162.0 1336.4,186.1 1374.0,186.0 1373.8,1413.4 1375.5,1613.1 1356.5,1714.0 1344.6,1738.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1374.0,943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2471653,38.6358215]}},{"type":"Feature","properties":{"resourceCoords":[1374.0,186.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2467253,38.6371119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p79","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0079","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"930.4,1670.2 934.1,1735.7 232.3,1720.1 237.8,1708.9 256.2,1609.0 253.7,1411.4 249.0,197.0 1132.6,190.3 1355.8,188.7 1340.9,899.5 1384.2,986.3 1425.1,986.1 1305.0,1684.8 930.4,1670.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[249.0,197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2467253,38.6371119]}},{"type":"Feature","properties":{"resourceCoords":[252.0,946.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2471653,38.6358215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p8","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0008","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.2,35.7 1483.3,32.0 1495.7,9.7 1501.3,1851.5 1541.6,1903.0 1442.9,1920.1 1442.3,1887.6 1070.2,1884.1 738.0,1890.0 103.7,1891.0 105.2,1503.9 104.9,1065.6 108.2,35.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2395735,38.6525713]}},{"type":"Feature","properties":{"resourceCoords":[738.0,34.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2432919,38.6542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p80","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0080","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"226.1,1707.5 337.6,1007.8 296.7,1008.5 252.4,922.3 258.6,211.7 491.1,207.1 1305.0,191.1 1352.0,188.0 1362.0,699.0 1370.2,988.4 1377.9,1727.6 1350.0,1743.9 1260.1,1759.5 1182.1,1733.0 226.1,1707.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1352.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2418648,38.6361188]}},{"type":"Feature","properties":{"resourceCoords":[1369.0,945.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2422995,38.6348114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p81","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0081","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"937.5,126.5 1346.0,127.3 1270.8,835.1 1353.8,834.9 1499.4,916.4 1429.3,916.6 1175.7,919.5 1156.0,1743.3 297.2,1730.9 295.6,1655.5 300.1,920.7 296.6,633.0 295.1,125.2 937.5,126.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[285.0,893.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24234093538969,38.6347914585439]}},{"type":"Feature","properties":{"resourceCoords":[285.0,135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24189308850696,38.63610631693325]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p82","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0082","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1255.2,1936.8 1097.0,1936.0 1050.0,1939.0 1049.0,1948.0 794.0,1948.0 793.0,1939.0 519.0,1939.0 322.0,1932.0 321.0,1938.0 313.0,1938.0 312.0,1927.0 296.0,1927.0 295.0,1933.0 290.0,1933.0 289.0,1925.0 219.0,1922.0 169.4,1922.2 201.8,1715.8 148.1,1715.0 167.9,905.1 329.4,903.4 417.3,902.5 486.1,902.3 343.0,822.0 261.5,822.2 335.8,126.4 345.2,126.5 1328.0,129.0 1335.8,901.4 1345.2,901.4 1338.3,1686.9 1346.5,1687.2 1304.4,1830.3 1328.0,1830.0 1327.8,1864.7 1255.2,1936.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1328.0,1830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2383127,38.6321588]}},{"type":"Feature","properties":{"resourceCoords":[1328.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2372924,38.6351605]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0083","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.2,448.7 58.0,448.0 60.0,397.0 40.8,396.4 38.8,168.8 13.9,169.1 27.6,113.8 239.9,165.8 679.5,158.6 1183.8,150.7 1184.3,148.7 1246.6,149.7 1258.7,149.5 1596.3,143.9 1596.3,155.4 1503.7,159.9 1580.4,293.6 1599.1,1656.9 1598.1,1734.3 52.9,1776.8 41.2,448.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[65.0,1776.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23720523327154,38.63516250825032]}},{"type":"Feature","properties":{"resourceCoords":[56.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23620223575755,38.63798824058685]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0084","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.2,1575.3 1584.3,1736.5 44.8,1698.8 44.8,909.2 35.3,909.2 20.7,132.9 44.5,132.7 44.5,122.7 1580.1,92.3 1591.1,1575.3 1584.2,1575.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[702.0,1788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23678510945768,38.63193390940221]}},{"type":"Feature","properties":{"resourceCoords":[1560.0,127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23383779976027,38.63442980107842]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0085","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.7,66.9 1501.4,208.8 1501.0,250.3 1542.3,255.8 1470.0,1932.1 1432.8,1934.8 1434.5,1904.6 1168.5,1858.7 151.2,1913.7 70.4,1865.2 48.4,1756.8 82.2,1455.2 29.9,1232.1 100.3,650.9 12.6,47.0 133.7,66.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1500.0,691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26252621493822,38.63810068818156]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26236772213146,38.63902181695563]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0086","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.0,30.0 260.0,29.0 268.0,23.0 404.0,31.0 687.0,17.0 689.1,16.6 1368.2,74.8 1331.5,553.8 1328.0,769.8 1395.6,777.1 1575.5,796.5 1525.1,1695.3 1519.0,1906.0 1519.0,1908.1 72.1,1911.5 72.5,1664.5 35.5,1651.8 72.5,1647.5 74.9,32.7 241.0,30.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1390.0,32.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25928945074381,38.63834081092513]}},{"type":"Feature","properties":{"resourceCoords":[1534.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25972107007661,38.63492765466273]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0087__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p87 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2489.6"},{"label":"split_canvas_w","value":"6408.0"},{"label":"split_canvas_h","value":"5306.4"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0087__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0087","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1423.7,1783.5 1494.3,1774.5 1494.5,1767.6 1532.5,1045.8 1547.2,735.8 1548.1,703.1 92.4,682.1 93.5,622.4 53.9,622.4 24.4,1621.0 105.0,1948.0 130.4,1940.8 131.0,1931.0 165.0,1931.0 165.9,1947.2 218.3,1939.5 489.1,1902.0 1346.4,1787.4 1423.7,1783.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0087__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1520.0,1282.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2600347,38.6338923]}},{"type":"Feature","properties":{"resourceCoords":[92.0,1282.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2633138,38.6343015]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p88","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0088","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1507.1,1933.9 1419.5,1935.3 954.4,1884.4 117.3,1784.9 71.7,1787.8 100.6,1272.1 50.4,905.4 98.7,194.4 93.7,173.9 154.7,156.7 155.7,173.2 208.9,165.4 484.3,127.8 1356.3,12.8 1371.2,10.9 1435.0,9.0 1506.5,9.4 1505.8,28.2 1506.0,682.0 1539.8,684.7 1505.3,1012.1 1504.8,1399.5 1508.7,1693.6 1507.4,1895.7 1507.1,1933.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1507.0,1950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2609692,38.6295755]}},{"type":"Feature","properties":{"resourceCoords":[1507.0,-7.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2602714,38.6330286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p89","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0089","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"765.0,263.0 1504.3,235.0 1499.6,597.6 1510.1,679.5 1527.2,718.4 1609.2,844.3 1620.8,899.8 1609.3,1467.7 1621.2,1550.5 1622.0,1719.6 1621.7,1736.3 1528.3,1735.2 1051.4,1729.6 717.4,1728.9 212.7,1712.3 91.7,1711.5 74.7,325.9 729.6,265.1 765.0,263.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[765.0,263.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2602714,38.6330286]}},{"type":"Feature","properties":{"resourceCoords":[1098.0,1730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2568535,38.6329601]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p9","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0009","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.9,1641.8 59.0,1014.0 49.0,685.3 47.8,317.1 80.0,316.0 81.0,271.0 71.6,270.9 61.8,218.5 163.9,136.6 647.2,244.2 1103.1,230.1 1611.2,306.2 1629.2,292.0 1629.2,1001.5 1633.0,1001.4 1633.0,1341.6 1633.0,1623.2 1430.4,1625.8 904.2,1631.1 67.9,1641.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[894.0,1014.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2378954,38.6518143]}},{"type":"Feature","properties":{"resourceCoords":[59.0,1014.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2395735,38.6525713]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0090","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"117.7,1534.5 117.0,1530.0 106.2,1448.6 122.9,891.9 112.1,837.3 32.9,713.1 16.4,674.8 7.0,594.4 15.0,238.9 326.4,228.5 361.1,226.7 573.9,219.2 1482.6,212.2 1482.6,212.8 1450.3,1594.3 1469.7,1620.0 1449.5,1630.3 1381.3,1667.8 1334.2,1690.8 1297.8,1705.6 1167.8,1732.6 1125.2,1735.2 1109.3,1734.8 999.0,1732.6 829.5,1728.7 770.4,1728.1 679.3,1750.0 622.7,1748.3 598.1,1747.5 576.0,1746.8 454.8,1739.4 379.0,1717.8 115.6,1712.2 116.1,1695.8 117.7,1534.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[319.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25986030989229,38.63486814523835]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,1557.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2561581169925,38.63628970298897]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0091","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"979.5,1846.1 732.3,1842.8 87.4,1851.4 85.3,1419.5 69.5,1332.2 40.5,1260.3 82.8,1276.2 141.3,1267.0 80.5,1238.8 56.9,82.8 224.9,79.8 727.0,84.0 1059.0,76.6 1533.2,70.5 1561.3,70.1 1543.8,1799.2 1548.0,1814.8 1499.5,1828.7 1402.3,1838.0 1138.5,1840.6 979.5,1846.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1394.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25405599941314,38.63288270211501]}},{"type":"Feature","properties":{"resourceCoords":[1111.0,75.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25685178081757,38.63297024137985]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0092","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.5,219.2 443.6,221.9 519.7,242.7 744.9,250.8 835.9,227.8 1191.6,230.9 1276.8,222.6 1400.6,184.1 1515.4,122.2 1508.4,507.1 1501.7,926.8 1496.8,1222.4 1489.0,1715.6 658.8,1711.2 467.2,1709.4 66.0,1708.0 115.5,218.6 179.5,219.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1492.0,1721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25243019483987,38.635483470351865]}},{"type":"Feature","properties":{"resourceCoords":[1492.0,213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25580870038753,38.63615809449249]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0093","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"399.1,1901.2 398.5,1875.3 399.9,1611.8 392.2,1514.7 379.0,1466.0 363.4,1470.0 142.3,1464.3 139.1,26.8 142.1,26.8 1041.4,31.8 1560.6,34.6 1575.4,729.0 1564.7,728.9 1586.3,1404.9 1580.6,1404.9 1578.3,1891.5 399.1,1901.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[392.0,1889.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25297151329389,38.632145765222596]}},{"type":"Feature","properties":{"resourceCoords":[135.0,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25246300972356,38.63545276131403]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0094","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1492.2,1727.1 1475.5,1744.0 1476.2,1841.8 654.2,1895.3 653.9,1870.3 73.8,1884.0 68.7,1401.2 74.3,1401.2 42.6,731.1 53.3,731.0 28.0,42.4 594.2,36.9 751.0,35.3 757.0,22.6 1451.4,31.7 1541.9,1392.8 1491.8,1393.0 1496.7,1727.1 1492.2,1727.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[642.0,1394.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24877997887802,38.632174358332925]}},{"type":"Feature","properties":{"resourceCoords":[642.0,36.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24793416731487,38.63453113838109]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p95","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0095","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"220.2,1823.6 92.4,1822.3 90.3,1487.1 140.6,1487.3 57.5,55.8 1378.6,106.5 1455.8,133.7 1545.2,119.2 1573.4,113.9 1575.7,196.2 1581.0,552.9 1588.2,653.0 1585.6,832.1 1549.0,1005.6 1341.1,1408.2 1286.0,1491.3 1127.1,1831.3 1088.0,1830.8 1038.2,1932.4 974.0,1937.0 973.0,1948.0 967.0,1948.0 966.0,1938.0 947.0,1938.0 946.0,1948.0 941.0,1948.0 940.0,1938.0 921.0,1938.0 920.0,1948.0 910.0,1948.0 909.0,1939.0 890.0,1939.0 889.0,1948.0 855.0,1948.0 854.3,1829.0 220.2,1823.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1318.0,1489.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24416831141356,38.63118198708003]}},{"type":"Feature","properties":{"resourceCoords":[1156.0,1824.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24472946429016,38.630677454151986]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0096__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p96 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6508.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0096__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0096","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"522.6,1904.2 651.6,1855.6 824.1,1778.2 896.0,1745.7 942.1,1848.5 1014.5,1752.8 1120.1,1603.5 1232.5,1434.0 1281.6,1359.5 1298.8,1300.4 1303.4,1293.6 1308.8,1285.5 1346.0,1230.6 1357.1,1214.3 1375.0,1214.4 1392.5,1186.7 1493.0,1008.6 1533.8,927.3 1572.1,821.8 1575.5,802.9 1572.0,803.0 1572.0,787.0 1579.5,781.4 1585.0,751.0 1619.0,688.1 1556.3,687.2 1626.0,414.6 1626.0,53.1 1000.5,44.2 869.9,42.1 853.1,58.7 852.5,155.6 36.9,197.1 35.3,667.0 33.0,916.4 33.5,1255.3 36.5,1674.9 36.5,1735.5 36.5,1872.5 36.5,1922.2 204.3,1922.7 207.0,1920.0 303.0,1923.0 319.8,1927.3 320.0,1925.0 343.0,1925.0 346.0,1934.0 447.0,1931.0 447.9,1934.8 459.1,1934.9 522.6,1904.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0096__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[54.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24963531811431,38.629496180401375]}},{"type":"Feature","properties":{"resourceCoords":[54.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24930855878462,38.63045927715618]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0097","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1235.3,1850.3 197.8,1806.3 347.1,1479.6 401.7,1395.5 607.3,989.0 642.5,814.2 643.6,634.1 635.5,533.5 627.0,174.8 626.3,157.3 1544.3,158.1 1510.2,396.9 1621.0,395.4 1621.0,1572.9 1549.9,1647.0 1560.2,1647.7 1236.0,1892.6 1235.3,1850.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[205.0,1821.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24476445867055,38.63067445066977]}},{"type":"Feature","properties":{"resourceCoords":[621.0,879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24326650725176,38.63209375905947]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1951 | sanborn04858_034 p99","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.20"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T20:17:02Z","modified":"2026-10-17T20:17:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0099","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1511.6,1812.1 1511.2,1934.9 1535.7,1933.1 1535.6,1916.2 1584.4,1821.4 1607.8,500.6 1550.8,33.2 1544.2,33.1 1543.4,188.7 65.0,144.6 24.6,283.6 47.5,283.3 47.4,317.0 1.0,363.3 1.0,669.1 9.0,670.0 9.0,721.0 1.0,721.9 1.0,736.0 9.0,736.0 11.0,773.0 1.0,774.8 1.0,784.1 12.0,785.0 14.0,799.0 46.0,800.0 47.0,824.0 46.0,832.0 40.0,833.0 41.0,851.0 1.0,851.0 1.0,1545.4 136.8,1693.2 1511.6,1812.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858195105:04858_05_1951-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[723.0,714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2370115,38.6310463]}},{"type":"Feature","properties":{"resourceCoords":[54.0,714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.238567,38.6313733]}}]}}]}