{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_019.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1938 | 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":"89"},{"label":"placed","value":"85"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef 51, georef-snap 32, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"2 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p14 (tier 1, 38.57969,-90.22634 +/-249m); p38 (tier 1, 38.57686,-90.23412 +/-252m); p62__2 (tier 1, 38.57443,-90.23320 +/-133m); p87 (tier 2, 38.56617,-90.23840 +/-426m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0010/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 | 1938 | sanborn04858_019 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0010","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"254.8,768.6 129.2,1162.3 138.9,1777.3 723.9,1909.5 1470.0,1817.3 1465.8,957.8 1359.6,960.1 1321.7,266.0 1435.4,216.8 1458.0,30.4 1455.9,1.0 1284.7,1.0 1285.0,134.4 758.0,158.5 757.9,118.4 273.1,141.8 273.5,62.6 272.6,1.0 268.3,1.0 254.8,768.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1281.0,929.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.22431380272123,38.582120747153034]}},{"type":"Feature","properties":{"resourceCoords":[1281.0,425.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2254563076196,38.58226753280346]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0011/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 | 1938 | sanborn04858_019 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0011","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.2,216.8 1293.0,217.0 1293.5,438.6 1481.1,444.3 1481.8,461.2 1293.6,460.6 1299.5,1716.8 541.1,1722.2 287.0,1718.0 284.0,715.0 282.2,216.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[284.0,715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2375436,38.5801021]}},{"type":"Feature","properties":{"resourceCoords":[1293.0,217.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2383012,38.5820395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0012/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 | 1938 | sanborn04858_019 p12","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0012","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"272.8,1208.5 274.2,205.8 528.4,211.3 1287.0,210.0 1287.0,713.0 1287.0,1483.5 778.7,1483.7 779.0,1695.7 272.2,1701.5 272.8,1208.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1287.0,1213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2326083,38.5813346]}},{"type":"Feature","properties":{"resourceCoords":[1287.0,210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2348896,38.581616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0013/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 | 1938 | sanborn04858_019 p13","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0013","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"288.2,1121.7 290.3,296.1 790.0,291.0 790.0,82.0 1291.2,82.4 1310.5,82.4 1330.5,519.2 1277.0,518.2 1276.2,808.0 1344.7,808.2 1262.9,1700.8 1276.1,1708.4 1277.2,1799.0 1114.8,1797.7 1106.8,1792.6 867.9,1747.8 326.9,1780.1 294.6,1125.4 288.2,1121.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[790.0,291.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2316928,38.5802959]}},{"type":"Feature","properties":{"resourceCoords":[790.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.232175,38.5803549]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0015/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 | 1938 | sanborn04858_019 p15","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0015","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.4,1774.2 150.6,1613.2 144.6,1522.2 143.1,1219.2 145.2,1041.1 139.7,501.6 128.7,423.7 94.0,277.4 236.6,268.0 288.9,315.5 590.5,308.2 1310.3,237.2 1400.8,274.3 1410.8,1050.3 1408.7,1286.4 1411.0,1767.0 150.4,1774.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[144.0,1289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2702855,38.5895662]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,1767.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2677775,38.5881182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0016/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 | 1938 | sanborn04858_019 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0016","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1037.6,64.2 1365.5,95.5 1382.5,83.5 1386.0,313.8 1386.5,591.2 1390.7,1162.7 1392.1,1647.8 1393.3,1761.7 177.5,1763.8 174.6,1283.8 176.4,1048.0 165.6,273.2 1037.6,64.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[173.0,783.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26716981107455,38.589820858919346]}},{"type":"Feature","properties":{"resourceCoords":[173.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26778508106217,38.58812694979997]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0017/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 | 1938 | sanborn04858_019 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0017","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.4,1449.4 228.0,902.0 140.4,635.9 64.7,415.8 62.2,408.9 143.4,216.3 710.8,43.9 1444.2,40.5 1410.0,894.3 1451.8,894.3 1452.0,1172.3 1463.4,1443.1 1479.0,1443.4 1485.5,1924.4 816.8,1914.9 565.0,1914.7 411.4,1449.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1439.0,1448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26276049368963,38.58754108780136]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,889.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26204776181584,38.58836839373063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0018/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 | 1938 | sanborn04858_019 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0018","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1176.6,1919.0 967.0,1916.2 231.8,1904.0 226.6,1425.2 211.1,1424.8 200.3,1155.4 200.8,878.7 159.3,878.6 195.5,29.0 903.3,27.6 1469.0,101.5 1546.4,49.7 1501.2,227.5 1460.7,423.0 1432.1,583.1 1371.1,987.0 1341.8,1156.0 1229.2,1948.0 1172.2,1948.0 1176.6,1919.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[211.0,883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26201651429115,38.58833128439513]}},{"type":"Feature","properties":{"resourceCoords":[1527.0,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2584441092625,38.58826080844556]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0019/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 | 1938 | sanborn04858_019 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0019","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"990.7,217.9 1461.6,58.0 1570.5,21.1 1570.3,272.7 1550.8,1679.3 1548.6,1889.8 1363.6,1862.2 1235.0,1840.9 1112.4,1860.0 1040.5,1841.3 703.6,1761.2 224.6,1663.0 126.9,1662.0 127.2,1642.6 20.0,1618.7 24.8,1363.8 35.3,581.3 38.8,533.6 990.7,217.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[102.0,1614.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26386718170124,38.58395794260676]}},{"type":"Feature","properties":{"resourceCoords":[1037.0,1835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26225530164507,38.58512188784396]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__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 | 1938 | sanborn04858_019 p1 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"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":"6468.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.4,1742.4 356.7,1834.2 510.3,1842.6 1002.9,1843.2 1539.7,1849.7 1539.7,323.9 886.3,240.7 710.0,592.3 583.9,841.1 139.1,1726.2 131.6,1740.7 172.4,1742.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1537.0,1388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2489158,38.5856684]}},{"type":"Feature","properties":{"resourceCoords":[753.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2511769,38.5844605]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__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 | 1938 | sanborn04858_019 p1 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.47"},{"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":"3544.4"},{"label":"split_canvas_h","value":"3019.2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"568.2,665.1 823.8,134.5 783.9,97.4 842.6,61.9 445.2,28.2 438.9,1.0 433.4,1.0 329.2,20.6 257.7,1.0 253.5,1.0 1.0,499.9 1.0,595.5 568.2,668.5 568.2,665.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[668.1,206.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25247,38.5862239]}},{"type":"Feature","properties":{"resourceCoords":[254.0,0.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2531082,38.5854788]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0002/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 | 1938 | sanborn04858_019 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0002","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"273.6,232.6 296.7,210.1 623.2,208.7 718.0,217.8 834.5,216.9 912.5,205.4 1290.8,200.8 1287.9,457.3 1287.1,715.7 1330.3,792.6 1456.7,771.9 1482.0,1019.7 1545.0,1078.1 1460.9,1496.5 1483.0,1948.0 1294.5,1942.3 1293.8,1719.5 277.4,1719.9 271.8,715.1 273.6,232.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[280.0,714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24094940367088,38.580539482532906]}},{"type":"Feature","properties":{"resourceCoords":[1287.0,1217.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23943948273656,38.582173020900505]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0020/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 | 1938 | sanborn04858_019 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0020","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"315.6,554.9 315.6,993.1 313.0,1447.0 307.1,1671.4 310.1,1894.5 512.3,1893.7 1222.5,1488.2 1230.2,993.9 1224.6,545.9 1227.0,169.0 892.1,92.8 421.4,1.0 319.4,1.0 319.1,32.8 316.6,325.2 315.6,554.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[313.0,1447.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.261007,38.5824607]}},{"type":"Feature","properties":{"resourceCoords":[1227.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2622388,38.5851207]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0021/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 | 1938 | sanborn04858_019 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0021","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.5,1282.0 58.8,1221.0 69.3,1156.9 80.7,1079.8 109.3,1079.1 163.8,682.7 178.1,598.0 207.7,395.9 221.7,315.7 241.5,217.8 263.6,128.8 293.6,108.5 512.6,69.5 975.1,88.4 1136.8,65.4 1342.6,94.3 1389.1,78.3 1390.3,119.4 1411.5,119.4 1457.8,558.7 1401.9,557.1 1466.7,1790.4 1367.6,1790.6 1146.6,1789.3 922.3,1785.4 922.7,1683.8 721.9,1325.4 473.6,1319.6 248.6,1320.6 59.2,1317.9 68.5,1282.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[474.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26068172697354,38.5842667772814]}},{"type":"Feature","properties":{"resourceCoords":[927.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25896127353028,38.58335722175963]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0022/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 | 1938 | sanborn04858_019 p22","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0022","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"767.9,1821.1 767.1,1819.4 763.4,1810.8 195.3,1762.5 196.1,1782.1 176.4,1781.9 123.1,558.8 145.2,559.6 178.6,560.9 136.6,125.0 115.5,124.8 114.7,84.0 163.8,67.6 285.9,76.2 329.5,40.5 367.8,86.2 375.8,127.2 677.2,129.9 722.1,107.7 729.9,130.2 927.4,131.6 925.1,312.3 900.9,383.0 1132.3,567.0 1349.0,567.0 1345.7,591.5 1350.3,860.9 1214.5,861.3 1202.8,861.3 1079.5,1383.5 1079.8,1429.3 1090.2,1447.0 1099.9,1761.0 767.9,1821.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[315.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2575909,38.5805936]}},{"type":"Feature","properties":{"resourceCoords":[1349.0,567.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2504816,38.5822088]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0023/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 | 1938 | sanborn04858_019 p23","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0023","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.7,922.8 585.0,911.9 633.8,918.2 632.4,485.2 998.5,21.8 1139.9,69.6 1501.0,73.0 1498.9,352.8 1494.6,1346.5 1490.3,1633.2 1488.2,1879.3 634.5,1862.8 634.3,1872.5 63.6,1862.4 61.4,1736.5 56.4,1466.7 46.7,922.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[59.0,1635.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2498412,38.5806232]}},{"type":"Feature","properties":{"resourceCoords":[1501.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2509932,38.5843633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0024/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 | 1938 | sanborn04858_019 p24","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0024","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.3,1584.3 67.1,1307.1 75.1,812.1 72.2,750.9 65.6,321.3 64.4,63.4 64.3,54.2 639.1,65.3 639.3,55.5 1499.1,73.5 1496.5,322.8 1491.0,812.0 1488.7,1575.1 1517.6,1666.9 1563.5,1767.0 1496.2,1814.1 1390.0,1833.8 688.2,1851.5 80.6,1871.4 70.3,1584.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[641.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2472133,38.5805092]}},{"type":"Feature","properties":{"resourceCoords":[1491.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2461303,38.5817803]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0025/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 | 1938 | sanborn04858_019 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0025","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"788.2,1882.1 788.1,1790.7 277.9,1885.9 255.2,1251.0 233.8,1215.3 233.2,1164.2 232.7,1122.7 476.7,65.3 500.4,65.1 567.4,64.6 775.1,63.0 1325.7,52.2 1344.1,1254.9 1334.8,1254.8 1370.9,1882.8 788.2,1882.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25124423957192,38.58127325180061]}},{"type":"Feature","properties":{"resourceCoords":[1334.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2501996848163,38.58072559829702]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0026/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 | 1938 | sanborn04858_019 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0026","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.2,1900.7 768.2,1899.1 245.3,1893.9 214.6,1264.5 223.9,1264.7 216.1,59.8 489.8,56.6 626.6,55.2 886.3,55.5 1318.8,51.2 1326.2,304.0 1321.0,1024.2 1324.2,1277.9 1322.3,1513.2 1325.2,1900.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[773.0,71.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24912053853437,38.58022546077137]}},{"type":"Feature","properties":{"resourceCoords":[224.0,71.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25016748570008,38.580764016095884]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0027/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 | 1938 | sanborn04858_019 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0027","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"278.5,54.3 775.1,61.0 1053.2,57.0 1341.3,46.0 1347.1,1273.2 1334.8,1827.3 225.9,1833.1 223.1,1510.1 224.6,1276.2 220.9,1024.2 224.8,308.5 217.1,57.4 278.5,54.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24839547848909,38.5800218238917]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24532714790351,38.5784150987823]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24779468081711,38.575494483327766]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.25086301140269,38.57710120843716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0028/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 | 1938 | sanborn04858_019 p28","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0028","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"505.4,1726.3 304.1,1789.5 11.7,1881.5 72.1,1198.4 49.9,1200.0 72.8,180.3 72.9,121.1 780.6,122.6 888.2,105.7 957.3,60.1 1316.1,904.2 1347.6,917.5 1335.0,947.4 1521.0,1395.0 505.4,1726.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[57.0,121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2451839,38.5795205]}},{"type":"Feature","properties":{"resourceCoords":[1521.0,1395.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2409499,38.5805247]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0029/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 | 1938 | sanborn04858_019 p29","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0029","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1068.5,1905.7 786.3,1906.2 503.6,1917.6 231.8,1899.6 231.0,663.0 215.8,50.3 275.0,49.3 1295.0,52.2 1341.0,667.4 1344.5,1910.5 1068.5,1905.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[231.0,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2459006,38.578616]}},{"type":"Feature","properties":{"resourceCoords":[795.0,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2448248,38.5780654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0003/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 | 1938 | sanborn04858_019 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0003","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"17.9,1871.1 291.0,1829.5 706.5,1769.3 1068.4,1719.2 1394.6,1671.9 1358.7,1402.7 1563.3,151.0 1410.7,122.7 1238.2,6.9 1229.2,1.0 1196.8,1.0 1042.9,223.8 763.0,634.1 487.1,1037.5 62.1,1670.2 35.2,1762.5 17.9,1871.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[754.0,635.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24705692836564,38.58225970467379]}},{"type":"Feature","properties":{"resourceCoords":[1050.0,1730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24453787898588,38.5827938759246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0030/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 | 1938 | sanborn04858_019 p30","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0030","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"475.9,1899.1 204.2,1890.2 213.0,657.0 173.5,46.3 171.7,24.3 850.0,77.8 980.8,479.9 1081.0,769.0 1308.0,1465.0 1453.3,1917.2 1298.5,1911.7 1024.8,1912.1 752.4,1902.3 475.9,1899.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1308.0,1465.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2426712,38.5752425]}},{"type":"Feature","properties":{"resourceCoords":[213.0,657.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2437889,38.5775259]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0031/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 | 1938 | sanborn04858_019 p31","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0031","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1366.9,1683.3 864.3,1684.6 864.2,1658.1 245.1,1657.2 264.6,1447.6 283.9,1241.1 370.2,194.6 1362.5,189.1 1399.6,188.9 1379.8,681.0 1370.0,681.1 1369.5,929.2 1369.5,932.0 1369.0,1211.0 1366.9,1683.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1369.0,1211.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2390453,38.5784132]}},{"type":"Feature","properties":{"resourceCoords":[869.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2398074,38.580383]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0032/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 | 1938 | sanborn04858_019 p32","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"33"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0032","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1532.8,1699.2 1087.4,1761.0 1087.0,1736.1 804.4,1734.1 265.4,1741.5 46.4,1742.2 112.9,1015.3 135.1,711.0 182.2,200.1 805.3,200.6 805.4,227.2 1311.1,225.7 1310.2,477.2 1308.9,979.9 1307.6,1230.2 1510.8,1229.0 1531.1,1254.3 1532.8,1699.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1089.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.240111,38.5758356]}},{"type":"Feature","properties":{"resourceCoords":[1309.0,737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2394235,38.5766602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0033/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 | 1938 | sanborn04858_019 p33","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0033","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1542.5,458.2 1531.0,1219.0 1520.1,1626.8 1521.1,1843.5 1520.9,1861.7 514.3,1658.5 513.8,1701.8 18.2,1722.2 28.9,1224.0 34.2,939.0 39.0,688.0 48.8,688.1 77.3,190.7 540.3,196.6 1547.8,210.0 1542.5,458.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[39.0,688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2388441,38.579361]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2356362,38.5780316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0034/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 | 1938 | sanborn04858_019 p34","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0034","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1504.0,1229.5 1504.9,742.1 1508.1,480.3 1508.4,371.2 505.9,176.9 505.7,219.8 13.0,243.9 9.9,475.0 3.6,977.5 1.0,1158.2 1.0,1227.7 203.0,1228.5 223.0,1254.0 220.2,1724.3 495.3,1726.0 1244.2,1734.7 1503.0,1737.0 1504.0,1229.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[505.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2382862,38.576526]}},{"type":"Feature","properties":{"resourceCoords":[1503.0,1737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2363654,38.5744631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0035/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 | 1938 | sanborn04858_019 p35","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0035","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.8,1648.3 775.0,1666.1 775.0,1670.7 267.4,1668.5 266.1,1606.2 271.1,1201.0 271.3,445.6 273.0,199.0 1273.0,196.7 1272.2,1388.2 1270.8,1648.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[775.0,1201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2344875,38.5778866]}},{"type":"Feature","properties":{"resourceCoords":[1272.0,1201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2333547,38.5777435]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0036/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 | 1938 | sanborn04858_019 p36","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0036","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1381.5,1759.9 271.9,1695.3 263.5,1223.8 254.8,732.5 252.8,468.6 250.7,340.4 245.8,186.3 758.1,182.1 758.1,177.4 1258.3,153.2 1258.2,141.2 1315.3,301.1 1281.0,308.5 1302.5,519.2 1507.9,774.4 1407.7,814.9 1304.2,1231.2 1364.1,1442.8 1439.8,1437.2 1435.1,1805.7 1399.6,1823.8 1381.5,1759.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[765.0,727.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2348594,38.5760877]}},{"type":"Feature","properties":{"resourceCoords":[765.0,1730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2352538,38.574321]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0037/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 | 1938 | sanborn04858_019 p37","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0037","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"748.3,1795.3 704.2,1703.4 200.5,1800.0 147.7,1639.8 151.9,1390.8 166.8,195.6 660.1,200.3 1497.7,208.2 1436.7,309.7 1307.3,525.5 1147.6,789.3 1035.2,1813.4 748.3,1795.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[154.0,1203.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2333547,38.5777435]}},{"type":"Feature","properties":{"resourceCoords":[1163.0,205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2307183,38.579251]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0039/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 | 1938 | sanborn04858_019 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0039","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1366.0,407.6 1423.9,416.4 1402.0,1459.5 1401.5,1481.2 1339.2,1482.9 1286.3,1483.5 1286.1,1462.2 370.8,1484.0 370.7,1486.3 244.8,1491.0 127.4,1490.8 127.0,1473.7 124.3,1345.8 120.7,1120.3 118.3,900.1 116.4,874.9 92.9,875.8 53.5,511.0 146.8,370.4 117.0,143.2 203.6,102.7 378.4,68.3 537.2,156.3 797.5,105.2 1280.5,104.2 1298.6,101.3 1366.0,407.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[129.0,1351.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27357660351889,38.582155260741814]}},{"type":"Feature","properties":{"resourceCoords":[381.0,581.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27664161726796,38.58377870145146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0004/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 | 1938 | sanborn04858_019 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0004","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"791.9,173.3 1331.0,182.2 1336.1,281.0 1335.0,1353.9 1281.5,1437.2 1241.3,1444.6 816.6,1556.7 506.8,1644.0 317.9,1693.7 249.2,1432.2 296.9,170.6 791.9,173.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1014.0,1514.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24488652330217,38.58470182342332]}},{"type":"Feature","properties":{"resourceCoords":[1323.0,410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24733126706157,38.58550140234415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0040/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 | 1938 | sanborn04858_019 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0040","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4.5,119.7 273.2,79.5 1467.5,96.8 1503.5,129.7 1509.0,407.1 1416.7,695.6 1489.9,1237.5 1502.8,1471.8 1429.7,1488.2 1390.7,1493.3 1121.5,1493.2 1032.7,1491.2 881.5,1490.2 836.0,1492.7 755.8,1491.8 577.1,1488.4 263.4,1488.4 143.1,1486.8 86.5,1487.5 124.0,433.4 66.8,424.0 4.5,119.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[878.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27436393517425,38.58998213559139]}},{"type":"Feature","properties":{"resourceCoords":[267.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27114178063819,38.58701637322524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0041/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 | 1938 | sanborn04858_019 p41","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0041","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1390.6,1836.8 127.5,1795.3 126.2,1587.0 121.0,1349.3 121.8,1107.7 115.7,477.8 119.0,119.0 1382.1,113.2 1382.1,608.6 1389.0,1106.0 1388.5,1586.9 1390.5,1826.1 1390.6,1836.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1389.0,1106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2683804,38.5863982]}},{"type":"Feature","properties":{"resourceCoords":[119.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2705751,38.5887228]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0042/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 | 1938 | sanborn04858_019 p42","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0042","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1382.1,1815.5 1380.5,1336.1 1377.4,1096.0 1382.4,856.9 1382.8,348.8 1381.8,148.3 124.9,102.5 124.7,1.0 82.7,1.0 110.5,1811.8 115.0,1812.0 1382.1,1815.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1383.0,377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2689705,38.5847356]}},{"type":"Feature","properties":{"resourceCoords":[115.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2726779,38.5828522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0043/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 | 1938 | sanborn04858_019 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0043","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1385.3,111.2 1387.5,605.6 1385.0,1602.7 1385.0,1808.8 1385.0,1826.0 166.1,1821.0 166.1,1818.6 165.2,1579.4 167.7,1098.4 162.9,600.9 165.0,105.3 1385.3,111.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[161.0,1101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2683968162838,38.58639687332802]}},{"type":"Feature","properties":{"resourceCoords":[161.0,113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2677911648152,38.588106818874984]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0044/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 | 1938 | sanborn04858_019 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0044","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1321.3,1822.9 146.8,1814.1 147.1,1333.1 145.1,1092.2 151.2,852.3 153.7,342.4 153.5,132.9 1370.5,142.1 1370.2,189.3 1365.5,871.7 1364.0,1354.8 1357.4,1824.8 1321.3,1822.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[143.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2695788947963,38.583067473522156]}},{"type":"Feature","properties":{"resourceCoords":[143.0,379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26899936181758,38.58472629708819]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0045/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 | 1938 | sanborn04858_019 p45","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0045","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"613.1,1905.6 469.8,1464.1 317.4,1012.0 104.6,372.6 84.5,312.4 19.6,119.8 66.3,123.0 833.4,131.9 1083.2,136.2 1106.5,31.1 1158.0,31.9 1447.0,36.6 1455.0,36.8 1437.2,1068.9 1432.4,1068.9 1467.2,1897.7 1359.2,1897.3 743.0,1895.0 613.1,1905.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[980.0,641.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2648212,38.5831756]}},{"type":"Feature","properties":{"resourceCoords":[743.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2669157,38.5815255]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0046/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 | 1938 | sanborn04858_019 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0046","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"879.5,1913.7 743.3,1913.0 350.9,1911.4 235.3,1910.9 200.3,1071.7 205.2,1071.7 223.6,26.6 445.4,29.4 884.0,33.0 1338.2,39.5 1333.0,1073.3 1325.0,1915.3 879.5,1913.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[883.0,1073.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26320676217524,38.58137873406365]}},{"type":"Feature","properties":{"resourceCoords":[883.0,55.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26189490442258,38.582896013841]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0047/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 | 1938 | sanborn04858_019 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0047","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"986.7,1911.0 545.5,1908.1 93.4,1908.8 101.2,1064.1 105.9,27.0 331.1,34.6 555.2,33.4 1003.4,41.1 1445.2,43.6 1445.9,273.4 1456.8,1076.5 1471.3,1486.5 1477.3,1906.8 986.7,1911.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[552.0,1073.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26150392060843,38.58045881390661]}},{"type":"Feature","properties":{"resourceCoords":[1003.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25934878051075,38.581505791961945]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0048/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 | 1938 | sanborn04858_019 p48","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0048","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"553.2,212.5 778.1,212.8 986.3,200.3 1207.0,111.9 1416.4,22.4 1453.5,10.1 1420.4,1134.3 1466.2,1123.9 1446.6,1223.2 1413.4,1222.2 1408.0,1793.0 362.6,1791.0 124.9,1786.1 133.5,1748.2 83.3,1700.1 60.4,1352.7 66.8,369.3 163.2,214.5 152.0,200.0 553.2,212.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[972.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.257546,38.5720526]}},{"type":"Feature","properties":{"resourceCoords":[1408.0,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2559367,38.5721511]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0049/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 | 1938 | sanborn04858_019 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0049","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"515.9,1868.3 453.3,1522.0 485.9,1521.8 488.4,1417.3 347.2,1038.1 253.9,1036.5 54.1,1030.2 53.9,818.3 49.2,611.6 49.0,206.7 50.1,90.8 169.9,92.1 169.2,72.2 746.5,123.5 750.2,132.3 751.0,134.0 1345.5,28.6 1345.2,74.5 1344.2,413.6 1314.6,412.4 1320.8,441.2 1402.2,1045.4 1384.1,1047.1 1568.0,1874.5 1002.9,1854.5 1009.0,1873.2 515.9,1868.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[732.0,1519.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2594632216869,38.575513256984145]}},{"type":"Feature","properties":{"resourceCoords":[295.0,117.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25761830437095,38.58053365872398]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0005/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 | 1938 | sanborn04858_019 p5","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0005","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"284.9,1615.7 288.5,709.5 551.1,626.4 951.2,503.1 1300.0,398.1 1294.7,1425.8 1300.0,1533.5 1295.0,1639.0 919.4,1640.5 841.9,1651.2 726.3,1651.2 632.3,1641.3 308.2,1640.1 284.9,1615.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[285.0,1639.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2420929,38.5806738]}},{"type":"Feature","properties":{"resourceCoords":[1295.0,1639.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2417348,38.5824741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0050/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 | 1938 | sanborn04858_019 p50","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0050","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"308.7,1844.4 309.3,1828.0 260.4,1818.0 87.6,1027.8 105.3,1026.2 27.4,432.9 21.4,404.6 50.5,405.9 52.5,73.0 597.5,80.3 871.8,82.0 871.7,51.2 1419.7,54.7 1418.9,83.9 1418.8,417.0 1419.7,503.8 1445.3,504.0 1439.7,1046.2 1418.4,1045.8 1223.6,1043.5 1135.6,1491.6 1136.4,1857.3 999.3,1854.0 865.0,1853.4 590.3,1849.7 308.7,1844.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[593.0,1494.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2550247,38.5732248]}},{"type":"Feature","properties":{"resourceCoords":[868.0,287.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.250898,38.5763417]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0051/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 | 1938 | sanborn04858_019 p51","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0051","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1087.2,1784.9 221.1,1784.1 231.3,1236.1 227.9,958.8 228.4,413.1 231.0,244.6 232.2,169.2 1324.4,173.2 1324.0,375.7 1323.3,687.3 1315.0,1234.0 1309.9,1781.3 1087.2,1784.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[228.0,687.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.249616,38.5723845]}},{"type":"Feature","properties":{"resourceCoords":[1315.0,1234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2471851,38.5734711]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0052/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 | 1938 | sanborn04858_019 p52","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0052","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"21.9,1240.0 29.0,693.0 29.0,381.2 29.0,127.0 203.9,123.9 875.2,118.1 1487.4,129.4 1471.7,398.9 1485.1,679.1 1487.8,958.9 1485.1,1232.5 1481.1,1504.2 1482.8,1780.4 236.3,1785.1 18.0,1787.5 21.9,1240.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[29.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2482232,38.5740268]}},{"type":"Feature","properties":{"resourceCoords":[29.0,127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2493068,38.5745908]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0053/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 | 1938 | sanborn04858_019 p53","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0053","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.7,1354.6 216.8,1068.4 222.2,805.3 219.0,251.0 1088.8,248.1 1312.5,243.4 1314.3,795.0 1310.8,1230.8 1306.3,1443.3 342.0,1777.0 210.9,1824.7 217.7,1354.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[342.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2444576,38.5699471]}},{"type":"Feature","properties":{"resourceCoords":[219.0,251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2475204,38.5712839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0054/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 | 1938 | sanborn04858_019 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0054","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"17.8,1447.5 23.4,1235.5 29.3,800.6 30.6,250.1 248.7,249.8 1494.2,257.3 1488.3,530.1 1492.7,804.1 1489.4,959.1 492.8,1290.0 17.8,1447.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24665907818924,38.57312086442082]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24465451900521,38.5755258382885]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24092195090489,38.57359731979346]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24292651008892,38.57119234592578]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0055/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 | 1938 | sanborn04858_019 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0055","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"946.9,1611.0 945.9,1736.7 287.2,1738.5 42.6,1734.9 147.3,694.6 194.7,225.6 414.1,225.4 953.9,219.2 1237.0,221.8 1237.3,261.9 1241.0,701.1 1252.6,719.6 1444.8,719.1 1465.3,1226.0 1464.8,1408.5 946.9,1611.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.2430307709654,38.57570208580841]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23940795434086,38.57524230230255]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24012155769333,38.571756962216945]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24374437431787,38.5722167457228]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0056/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 | 1938 | sanborn04858_019 p56","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0056","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1285.0,1715.0 248.1,1730.3 338.4,720.9 384.1,222.8 628.1,224.9 1285.0,219.0 1288.7,723.0 1284.3,991.8 1283.7,1252.4 1282.7,1482.7 1285.0,1715.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1285.0,1715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2420929,38.5696629]}},{"type":"Feature","properties":{"resourceCoords":[1285.0,219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2415183,38.5723237]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0057/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 | 1938 | sanborn04858_019 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0057","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"712.5,1596.9 223.1,1577.0 226.1,1336.1 210.8,830.6 19.2,829.1 7.8,810.5 8.7,372.7 8.7,357.4 454.4,301.7 454.2,327.0 729.0,329.4 1477.0,339.9 1501.2,340.2 1480.2,1337.1 1476.2,1337.2 1503.9,1590.6 1214.2,1604.8 1214.7,1583.5 712.5,1592.4 712.5,1596.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24020785354642,38.575549011110446]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23656809064087,38.57511711347544]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.23723841270044,38.571615463658794]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.24087817560599,38.5720473612938]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0058/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 | 1938 | sanborn04858_019 p58","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.61"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0058","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"404.6,1941.8 419.0,1605.8 150.6,1622.0 118.7,1361.5 122.8,1361.5 130.4,335.0 370.0,335.0 369.7,294.5 475.0,301.8 1493.3,372.0 1511.0,436.9 1454.0,465.1 1411.5,1200.2 1326.3,1531.7 1337.2,1581.8 1276.0,1581.5 1260.7,1624.2 864.8,1622.7 615.3,1612.4 404.6,1941.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[869.0,335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2352538,38.574321]}},{"type":"Feature","properties":{"resourceCoords":[370.0,335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2363654,38.5744631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0059/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 | 1938 | sanborn04858_019 p59","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0059","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"256.9,1867.3 255.4,1634.0 257.2,1402.8 258.6,1141.1 264.1,871.1 262.0,365.0 262.4,238.3 780.1,32.6 780.4,92.1 1272.3,105.8 1268.4,847.1 1267.2,1100.5 1271.9,1803.8 1266.0,1859.0 1016.1,1864.3 512.3,1867.0 256.9,1867.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[262.0,365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2415183,38.5723237]}},{"type":"Feature","properties":{"resourceCoords":[1266.0,1859.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2398026,38.569382]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0006/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 | 1938 | sanborn04858_019 p6","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0006","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"603.6,319.1 793.0,262.0 1103.5,162.5 1529.2,34.0 1569.7,25.1 1560.5,40.4 1308.8,141.9 1351.8,793.4 1286.4,1676.6 1319.6,1740.2 1461.4,1717.5 1462.3,1771.0 1370.0,1816.4 1340.5,1775.2 762.4,1798.8 454.8,1886.2 356.9,1848.3 283.1,1930.4 287.0,1673.0 291.5,1566.4 285.7,1457.5 286.5,418.4 603.6,319.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[287.0,1673.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2417348,38.5824741]}},{"type":"Feature","properties":{"resourceCoords":[793.0,262.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2447326,38.5837634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0060/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 | 1938 | sanborn04858_019 p60","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0060","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"272.7,1808.1 268.7,1104.7 270.3,851.4 275.1,105.4 779.4,90.2 779.3,111.8 1333.9,77.7 1319.9,408.0 1256.8,506.8 1271.0,855.0 1271.0,1563.4 1258.4,1860.0 1021.4,1859.3 755.1,1862.4 266.7,1863.3 272.7,1808.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1271.0,855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2371509,38.5708768]}},{"type":"Feature","properties":{"resourceCoords":[1271.0,1860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2375249,38.5690957]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0061/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 | 1938 | sanborn04858_019 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0061","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"26.2,466.3 42.0,821.9 44.5,1545.2 32.8,1848.2 45.6,1848.1 45.5,1828.2 296.6,1899.7 279.6,1948.0 297.3,1948.0 305.6,1948.0 497.2,1833.0 489.6,1741.0 1005.3,1708.8 1058.4,1793.2 1356.0,1805.5 1440.5,1799.1 1531.2,1690.6 1510.8,317.4 1433.6,135.9 1045.2,92.2 1024.9,1.0 962.9,1.0 948.0,42.9 550.8,43.0 300.4,33.8 26.2,466.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[557.0,837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23601398289198,38.570700604119125]}},{"type":"Feature","properties":{"resourceCoords":[51.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23749763167312,38.56916544178831]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0062__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 | 1938 | sanborn04858_019 p62 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.22"},{"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":"6380.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0062__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0062","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"326.2,192.2 324.3,195.5 294.3,246.2 244.2,330.9 230.8,353.8 152.2,485.3 99.7,994.5 116.9,995.5 119.6,1326.8 204.8,1679.2 260.1,1719.5 569.5,1769.2 832.3,1036.5 835.9,1024.1 836.8,1024.1 837.4,1022.4 969.1,1020.7 1057.1,980.6 1461.2,985.3 1484.5,868.6 1454.9,582.9 1536.1,306.3 1515.7,151.2 1461.2,91.8 1227.8,94.3 1152.6,143.8 943.4,180.2 765.2,177.7 326.2,192.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0062__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[158.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2307183,38.579251]}},{"type":"Feature","properties":{"resourceCoords":[-268.0,1194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2333822,38.5759145]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0063/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 | 1938 | sanborn04858_019 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0063","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"55.6,265.3 106.2,262.4 547.6,265.6 999.5,266.4 1255.0,265.5 1471.2,1521.5 1252.2,1640.9 382.7,1787.3 265.1,1669.9 133.2,1235.2 198.8,982.6 74.0,310.9 56.5,312.5 55.6,265.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[981.0,1662.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27446845682148,38.579749484603376]}},{"type":"Feature","properties":{"resourceCoords":[417.0,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27578798163375,38.57978367123334]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0064/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 | 1938 | sanborn04858_019 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0064","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"734.3,1749.6 646.4,1772.6 319.9,1833.6 103.2,590.5 104.2,590.4 138.2,590.2 142.2,357.3 136.7,107.3 1407.0,120.1 1404.0,363.4 1402.3,1086.4 1393.5,1577.3 734.3,1749.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1399.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2704460812385,38.580593938909104]}},{"type":"Feature","properties":{"resourceCoords":[140.0,595.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27296310035098,38.582002842836474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0065/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 | 1938 | sanborn04858_019 p65","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0065","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1078.2,1772.0 1024.0,1772.0 1005.6,1862.8 602.5,1845.3 518.7,1862.6 373.0,1391.3 147.8,700.7 74.4,467.5 1198.4,111.2 1233.4,101.8 1365.6,92.9 1165.8,1072.9 1095.0,1410.5 1091.7,1772.0 1078.2,1772.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[224.0,932.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2701587,38.5813914]}},{"type":"Feature","properties":{"resourceCoords":[1024.0,1772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2696827,38.5793464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0066/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 | 1938 | sanborn04858_019 p66","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0066","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"562.6,1756.5 690.5,1747.0 1502.0,1749.0 1500.0,1424.9 1501.4,1086.3 1504.4,1086.3 1506.6,117.3 1479.2,117.0 1091.8,113.9 869.8,112.0 254.0,107.0 66.5,1072.3 1.0,1400.0 1.0,1760.3 189.9,1758.3 562.6,1756.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1502.0,1749.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2666292,38.5777733]}},{"type":"Feature","properties":{"resourceCoords":[254.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2669157,38.5815255]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0067/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 | 1938 | sanborn04858_019 p67","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0067","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1528.5,380.7 1526.9,862.4 1528.3,1113.2 1468.0,1113.7 1472.1,1462.7 1468.0,1792.0 73.2,1794.4 70.1,1464.4 70.4,1119.6 73.4,1119.6 72.4,133.0 181.3,133.5 629.1,135.5 1082.0,135.2 1524.1,138.7 1528.5,380.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1048.0,1115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.263909,38.5778054]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2639789,38.5763804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0068/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 | 1938 | sanborn04858_019 p68","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0068","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"596.5,143.5 992.5,149.9 1177.3,150.3 1468.1,897.4 1466.2,1104.3 1401.7,1105.7 1535.9,1789.8 56.0,1797.2 59.0,1468.8 53.8,1121.0 113.9,1120.2 111.7,870.2 111.7,390.0 106.6,148.8 596.5,143.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[997.0,1114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2613095,38.5764454]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2591851,38.5774073]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0069/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 | 1938 | sanborn04858_019 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0069","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1312.7,654.7 1331.2,738.6 1319.0,1143.3 1410.4,1160.6 1411.1,1215.0 1414.0,1422.4 1416.8,1730.9 995.6,1744.2 995.6,1728.3 574.4,1738.5 574.4,1753.2 173.4,1733.9 177.4,1720.3 68.3,1046.2 215.8,508.9 936.3,104.0 932.5,82.5 1312.7,654.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1046.0,252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27186798740887,38.57971575794738]}},{"type":"Feature","properties":{"resourceCoords":[934.0,84.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27232910639567,38.579718035213595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0007/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 | 1938 | sanborn04858_019 p7","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0007","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.0,1265.0 287.2,1771.4 1446.9,1772.6 1347.7,1688.4 1319.6,1035.8 1384.2,628.2 1333.2,262.0 1195.5,70.1 704.4,57.0 479.4,131.2 473.5,1.2 434.8,1.0 283.9,1.0 286.0,1265.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1295.0,761.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.235663,38.5835398]}},{"type":"Feature","properties":{"resourceCoords":[286.0,1265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2348896,38.581616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0070/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 | 1938 | sanborn04858_019 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0070","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"562.1,198.4 562.2,183.8 977.9,176.7 977.8,192.3 1393.5,182.1 1393.7,253.1 1402.9,382.0 1398.5,1199.4 1396.2,1708.2 1178.1,1725.4 1178.2,1716.8 126.6,1717.2 126.7,1707.3 130.3,1703.7 58.7,533.3 166.6,176.5 562.1,198.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1179.0,1194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26692115068774,38.577448138631375]}},{"type":"Feature","properties":{"resourceCoords":[127.0,1477.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26772521533954,38.57557998688352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0071/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 | 1938 | sanborn04858_019 p71","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0071","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.0,1382.5 66.3,189.2 175.5,80.8 175.4,90.8 1223.3,83.9 1223.3,92.5 1440.5,74.0 1442.0,942.0 1443.5,1873.0 1225.8,1841.2 172.0,1877.4 169.0,1722.8 74.8,1724.0 38.0,1382.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1442.0,942.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2639789,38.5763804]}},{"type":"Feature","properties":{"resourceCoords":[168.0,1671.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2642303,38.5737226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0072/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 | 1938 | sanborn04858_019 p72","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0072","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"137.4,1.0 42.6,1.0 52.4,102.2 128.6,177.3 43.6,483.9 47.1,1224.6 108.0,1426.2 91.2,1768.5 148.2,1843.7 546.0,1858.6 768.9,1860.3 975.4,1849.3 1194.8,1763.0 1403.0,1675.6 1418.7,166.7 1199.9,132.1 138.6,155.7 137.4,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1037.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2621245,38.5726513]}},{"type":"Feature","properties":{"resourceCoords":[142.0,639.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2628917,38.5730455]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0073/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 | 1938 | sanborn04858_019 p73","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0073","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1504.7,1808.7 1225.4,1799.3 957.8,1796.2 753.7,1799.8 650.1,1793.5 596.3,1775.8 363.2,1772.5 95.9,1772.7 91.2,1034.0 265.4,128.0 659.0,131.0 777.6,133.1 946.6,136.1 1493.9,138.1 1512.6,137.9 1512.4,1067.5 1510.7,1067.5 1505.7,1808.7 1504.7,1808.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[659.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2518544,38.5715619]}},{"type":"Feature","properties":{"resourceCoords":[659.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2506854,38.5729489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0074/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 | 1938 | sanborn04858_019 p74","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0074","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1185.5,1788.8 913.1,1787.5 645.1,1787.4 361.8,1794.5 92.7,1793.3 87.3,1054.2 89.0,1054.2 76.3,127.3 335.0,121.1 883.1,125.1 1435.0,118.1 1446.0,1051.0 1457.9,1787.2 1185.5,1788.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[347.0,1051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2497376,38.5704479]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,1051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2476459,38.5693372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0075/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 | 1938 | sanborn04858_019 p75","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0075","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"771.5,1799.1 223.1,1789.5 220.5,1052.5 221.3,118.5 483.7,125.3 769.0,126.0 1237.6,135.4 1311.3,349.6 1312.6,648.5 1318.0,1056.0 1320.6,1799.2 771.5,1799.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1318.0,1056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.245546,38.5682446]}},{"type":"Feature","properties":{"resourceCoords":[769.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2454203,38.5701827]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0076/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 | 1938 | sanborn04858_019 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0076","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"290.8,1180.4 293.7,880.7 222.8,665.0 177.7,533.0 1131.9,109.8 1146.3,103.7 1261.5,1515.2 1255.0,1515.2 494.0,1498.3 528.2,1604.1 290.4,1589.1 290.8,1180.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[293.0,1507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24543959165148,38.56836595543538]}},{"type":"Feature","properties":{"resourceCoords":[1206.0,1507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24367769291021,38.56748319544182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0077/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 | 1938 | sanborn04858_019 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0077","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"537.9,1814.4 277.1,1804.9 212.0,390.4 435.8,303.0 905.5,117.7 1136.9,22.1 1320.1,878.9 1332.2,1322.8 1339.8,1843.8 1056.8,1833.3 812.0,1827.5 537.9,1814.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[802.0,1292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24194625676114,38.56772891472065]}},{"type":"Feature","properties":{"resourceCoords":[709.0,200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24085461622968,38.569498179805834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0078/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 | 1938 | sanborn04858_019 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0078","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1359.6,1649.9 1365.0,1844.3 1086.5,1833.4 883.1,1820.6 342.3,1777.5 330.4,1356.5 148.9,511.6 598.1,334.9 842.1,236.3 1072.2,147.1 1065.2,129.1 1316.8,106.0 1318.3,155.5 1341.8,146.4 1337.4,152.0 1343.8,1399.7 1476.2,1654.0 1359.6,1649.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1083.0,145.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23750077849017,38.569088922289104]}},{"type":"Feature","properties":{"resourceCoords":[169.0,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.23974880563595,38.569381456750996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0079/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 | 1938 | sanborn04858_019 p79","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0079","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"396.2,134.5 1435.3,134.6 1434.0,688.1 1435.8,958.6 1432.1,1234.9 1434.2,1501.4 1432.5,1733.9 1415.2,1787.7 1002.7,1789.0 331.1,1798.2 144.2,1799.0 156.7,1787.6 94.2,1721.2 117.2,595.9 75.5,506.5 159.9,130.1 396.2,134.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[996.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2543983,38.5703955]}},{"type":"Feature","properties":{"resourceCoords":[996.0,134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2565,38.5714948]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0008/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 | 1938 | sanborn04858_019 p8","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"32"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0008","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"259.0,218.0 1418.4,216.8 1425.3,222.7 1292.1,343.6 1332.2,1391.6 1258.9,1693.8 1268.1,1732.0 1013.6,1733.0 251.1,1734.2 250.2,1438.4 304.9,1439.1 282.1,993.4 262.3,993.5 259.0,218.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1269.0,1222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2311083,38.5829704]}},{"type":"Feature","properties":{"resourceCoords":[259.0,218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2337455,38.5814749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0080/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 | 1938 | sanborn04858_019 p80","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0080","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"329.5,114.8 1004.2,114.6 1418.6,118.8 1411.7,222.6 1414.0,427.1 1409.2,695.1 1398.1,974.8 1391.3,1246.2 1392.8,1530.8 1387.2,1800.0 968.8,1797.6 154.9,1787.4 83.6,1693.5 76.4,341.4 95.3,149.3 141.8,113.2 329.5,114.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[985.0,691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2522437,38.5692581]}},{"type":"Feature","properties":{"resourceCoords":[135.0,691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2533045,38.5679819]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0081/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 | 1938 | sanborn04858_019 p81","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0081","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1415.2,1802.7 1274.4,1662.2 562.0,1683.1 251.6,1565.8 245.1,754.2 239.0,337.0 511.8,338.3 784.7,336.7 1333.5,339.2 1342.8,568.4 1352.2,1340.9 1354.2,1601.4 1577.9,1600.2 1581.6,1689.6 1415.2,1802.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[789.0,753.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2491041,38.5676069]}},{"type":"Feature","properties":{"resourceCoords":[239.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2496121,38.5687799]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0082/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 | 1938 | sanborn04858_019 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0082","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"258.1,1604.6 33.9,1603.4 34.5,1342.2 33.3,567.4 26.4,337.5 577.4,336.2 1066.8,341.2 1142.9,564.7 1513.2,1628.4 1519.0,1645.6 1422.0,1710.0 1430.3,1776.8 1023.0,1640.3 492.1,1712.6 300.0,1668.4 260.9,1694.3 258.1,1604.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[593.0,345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24646404623073,38.56709942042447]}},{"type":"Feature","properties":{"resourceCoords":[582.0,1613.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24809166850363,38.56521890833379]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0083/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 | 1938 | sanborn04858_019 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0083","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1291.7,729.1 1296.9,787.8 1282.3,1746.6 479.2,1789.4 243.4,1811.7 269.3,1783.2 199.8,1675.7 234.3,1133.4 224.7,1086.5 1291.7,729.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24538181914865,38.564927780711834]}},{"type":"Feature","properties":{"resourceCoords":[237.0,1082.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24632782049936,38.56429619650936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0084/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 | 1938 | sanborn04858_019 p84","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0084","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"465.0,642.0 474.4,154.4 1217.6,156.9 1204.3,394.1 1309.5,359.2 1298.2,1118.2 1299.8,1385.0 1298.5,1658.8 1013.6,1684.5 758.2,1699.3 235.2,1730.7 247.1,774.2 241.7,715.8 465.0,642.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[465.0,642.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2455554,38.5666356]}},{"type":"Feature","properties":{"resourceCoords":[1924.0,155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2446637,38.5693103]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0085/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 | 1938 | sanborn04858_019 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0085","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"403.6,249.6 1199.5,208.6 1470.7,193.6 1454.4,717.2 1431.3,709.1 1417.2,1274.0 1414.5,1274.2 1445.7,1749.0 1342.4,1755.4 1342.5,1780.1 1176.0,1749.9 788.1,1822.5 192.9,1780.2 98.7,1716.7 85.4,553.8 117.8,328.8 169.9,271.4 403.6,249.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[123.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24389385998066,38.56297924346771]}},{"type":"Feature","properties":{"resourceCoords":[649.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24133303513523,38.56282023900996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0086/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 | 1938 | sanborn04858_019 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0086","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.8,190.4 113.5,712.0 90.5,703.8 75.4,1266.3 72.7,1266.5 102.9,1739.4 1.0,1745.6 1.0,1770.4 144.4,1796.7 353.8,1724.1 902.3,1698.5 1510.1,1820.3 1610.0,1763.8 1610.0,1647.0 1415.8,1659.4 1416.8,1380.5 1422.5,1176.6 1446.3,634.4 1429.5,635.4 916.0,661.6 916.2,382.1 913.1,140.4 631.1,164.2 378.4,177.2 130.8,190.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[901.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24043147401828,38.565803123175264]}},{"type":"Feature","properties":{"resourceCoords":[368.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24110039790949,38.564988514859635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0009/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 | 1938 | sanborn04858_019 p9","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T03:20:01Z","modified":"2026-10-17T03:20:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0009","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"288.2,1648.7 288.1,1455.4 244.0,1181.0 116.8,1101.3 282.0,1102.0 280.4,1009.9 267.0,1002.1 346.5,94.5 1036.2,94.5 1289.7,94.0 1396.3,539.4 1339.5,754.0 1332.0,1607.2 1467.9,1600.6 1471.5,1653.0 1300.3,1652.3 1300.1,1786.7 773.1,1808.9 773.0,1768.8 288.2,1790.5 288.9,1711.3 283.9,1648.7 288.2,1648.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193808:04858_08_1938-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[282.0,1102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2280376,38.580749]}},{"type":"Feature","properties":{"resourceCoords":[1291.0,94.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2299563,38.5828251]}}]}}]}