{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_022.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1938 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"80"},{"label":"placed","value":"78"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 42, georef-snap 35, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 12 panels"},{"label":"unplaced pages","value":"p67__1 (tier 1, 38.54204,-90.25541 +/-100m); p74__2 (tier 1, 38.53945,-90.26224 +/-194m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1938 | sanborn04858_022 p1","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.62"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0001","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"980.1,327.4 1108.3,303.6 1595.1,160.2 1595.2,201.4 1595.3,216.9 1538.1,259.2 1530.4,1745.5 1535.7,1806.3 926.8,1771.8 926.2,1787.5 505.6,1743.2 505.0,1760.0 314.5,1762.6 61.0,1760.0 100.2,667.7 102.9,411.0 980.1,327.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[61.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2678983,38.5724599]}},{"type":"Feature","properties":{"resourceCoords":[505.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2673718,38.5731268]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0010","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"266.1,1796.5 269.9,1553.3 267.0,1297.0 267.2,1033.9 264.4,703.0 269.3,317.2 269.1,106.3 295.4,109.2 1268.5,116.4 1273.8,1045.1 1269.7,1560.5 1270.1,1802.0 513.5,1800.3 266.1,1796.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[267.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2540694,38.5657722]}},{"type":"Feature","properties":{"resourceCoords":[1271.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2521231,38.5647738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0011","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"297.9,1557.5 300.9,1040.8 293.5,109.8 313.2,109.8 520.4,44.8 1021.1,45.3 1298.9,150.7 1305.7,395.7 1296.3,571.2 1295.2,723.4 1298.0,1305.0 1293.7,1570.4 1298.5,1811.7 298.8,1799.7 297.9,1557.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1298.0,1305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2502082,38.5637617]}},{"type":"Feature","properties":{"resourceCoords":[1298.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2486988,38.5655523]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0012","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.1,153.7 591.9,87.5 1130.1,87.8 1292.6,146.8 1289.6,572.3 1270.1,572.2 1273.3,720.6 1288.6,720.5 1281.0,1807.3 279.6,1801.2 273.6,1562.2 276.7,1296.5 271.1,714.6 271.5,562.4 280.0,386.7 272.1,141.7 304.1,153.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[603.0,121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24807426934454,38.56520309290037]}},{"type":"Feature","properties":{"resourceCoords":[267.0,1801.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25087310757176,38.56301263797265]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0013","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"137.5,713.1 122.3,713.0 120.2,565.1 139.7,565.4 145.8,141.3 285.6,79.6 725.2,58.4 1274.1,123.3 1273.7,143.2 1356.5,144.2 1386.7,659.6 1413.0,1205.7 1409.2,1205.7 1351.1,1530.6 1336.7,1528.3 1079.5,1487.5 1034.4,1748.3 121.2,1834.3 137.5,713.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1160.0,1195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24615249536141,38.561867343256935]}},{"type":"Feature","properties":{"resourceCoords":[372.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2463262787026,38.56426738468946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1938 | sanborn04858_022 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0014","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1448.8,1682.9 1463.1,1530.6 1559.5,846.8 1494.8,120.9 784.8,64.0 107.4,120.6 1.0,110.4 1.0,130.3 83.3,129.6 124.6,646.8 162.7,1195.1 158.9,1195.1 107.5,1522.9 366.0,1558.3 905.5,1621.3 1448.8,1682.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[972.0,1189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24412768521054,38.56078275365503]}},{"type":"Feature","properties":{"resourceCoords":[972.0,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24341767850144,38.561592088050276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p15","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"30"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0015","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"50.5,274.2 49.9,409.0 51.9,929.0 55.5,1297.8 12.2,1312.0 17.5,1372.0 1.0,1372.3 1.0,1390.7 26.5,1860.7 39.8,1860.5 36.4,1583.7 66.0,1582.9 780.6,1640.3 780.0,1675.7 1219.2,1673.9 1218.7,1698.0 1353.4,1730.5 1353.4,1726.5 1508.0,1699.7 1506.1,1516.8 1504.4,1383.7 1536.7,1380.7 1540.6,1258.2 1548.8,897.0 1456.2,902.5 1332.9,906.9 1327.6,375.1 1323.1,250.2 1083.4,283.9 999.4,292.6 879.9,294.4 538.8,286.3 329.2,277.9 174.8,277.4 50.5,274.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1212.0,1410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2662868,38.5710689]}},{"type":"Feature","properties":{"resourceCoords":[303.0,1292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2691164,38.5685869]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0016","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"656.2,1908.2 1033.6,1906.7 1297.0,1908.7 1307.5,737.9 1337.9,552.9 1514.8,242.0 1517.1,170.0 60.3,35.0 1.0,35.8 1.0,1903.8 656.2,1908.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[717.0,1889.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26428462321276,38.56642929408441]}},{"type":"Feature","properties":{"resourceCoords":[57.0,606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.267544597328,38.56671492170002]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0017","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"106.5,130.4 107.3,1.0 1.0,1.0 1.0,1683.8 59.5,1678.5 54.3,1948.0 79.2,1948.0 136.9,1948.0 142.8,1548.7 737.5,1633.2 735.4,1786.0 1115.5,1509.7 1384.8,1316.3 1393.3,143.4 1132.0,139.8 757.5,139.0 106.5,130.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,1725.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26122816984274,38.56483009033071]}},{"type":"Feature","properties":{"resourceCoords":[803.0,143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26425985083611,38.56638453282033]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0018","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1301.1,108.5 1035.2,301.9 660.0,578.2 661.2,426.8 70.8,346.6 67.5,742.6 1.0,743.0 1.0,1777.7 39.7,1818.7 774.0,1819.0 1090.3,1815.3 1266.5,1816.4 1323.3,1816.8 1328.3,1544.1 1327.9,1516.8 1320.4,1053.9 1348.9,976.8 1393.5,926.0 1458.5,878.1 1542.3,468.4 1504.8,478.8 1310.3,103.0 1301.1,108.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[779.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25864864411461,38.56360318994681]}},{"type":"Feature","properties":{"resourceCoords":[55.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2595745735498,38.56251374542409]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0019","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"152.2,1451.2 152.1,1218.9 152.0,710.4 150.2,165.6 194.8,159.4 432.2,158.5 633.4,163.4 1136.1,163.4 1383.7,163.9 1400.3,163.8 1408.3,607.0 1412.0,607.0 1436.8,1765.0 1403.4,1765.6 1151.6,1769.2 652.7,1766.7 411.3,1769.0 158.2,1766.6 152.2,1451.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[147.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25730539553261,38.56520822871585]}},{"type":"Feature","properties":{"resourceCoords":[1145.0,165.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25469132010268,38.56500454424637]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0002","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.1,116.8 718.9,148.1 719.0,132.6 1318.6,148.9 1445.0,1234.4 1361.0,1352.8 1437.4,1482.5 1390.4,1684.4 1452.1,1832.8 1349.5,1909.3 1346.0,1948.0 1340.1,1948.0 1339.9,1788.2 707.8,1762.6 707.7,1773.1 194.7,1775.5 197.3,1384.5 198.2,1115.3 263.6,1110.5 275.6,863.0 304.0,133.3 304.1,116.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,1107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26562790409213,38.572020179760386]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26293796285445,38.57308239894801]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0020","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.3,1762.2 185.3,606.6 181.7,606.6 174.8,164.3 913.6,158.1 1513.5,160.1 1471.1,602.2 1412.0,601.9 1415.0,1350.0 1422.1,1748.3 1399.7,1764.8 421.9,1759.0 207.3,1762.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1415.0,1350.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2533434,38.5617052]}},{"type":"Feature","properties":{"resourceCoords":[415.0,607.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2543093,38.5638372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0021","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"385.9,1704.9 324.2,1703.7 195.4,1781.3 29.3,1761.4 22.7,1368.9 20.4,612.6 80.2,613.0 123.5,166.0 523.8,167.8 523.7,165.4 1531.6,168.8 1529.8,613.6 1536.2,613.4 1535.9,1370.2 1049.5,1368.5 1043.2,1270.5 386.3,1666.3 385.9,1704.5 385.9,1704.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[522.0,619.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25143215001162,38.56232492942474]}},{"type":"Feature","properties":{"resourceCoords":[40.0,1373.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25331556259377,38.561681863247706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__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_022 p22 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3906.8"},{"label":"split_canvas_w","value":"6432.0"},{"label":"split_canvas_h","value":"3889.2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1539.5,1794.3 1548.2,1794.0 1543.9,1567.3 1535.1,1242.6 1530.8,1083.4 1533.8,1079.5 1533.0,976.7 1458.1,976.7 1319.3,976.7 1192.0,1056.7 1025.6,1040.0 1026.0,1050.3 1003.7,1067.3 15.2,1079.6 41.0,1821.7 26.6,1821.9 1.0,1943.6 1.0,1948.0 616.8,1948.0 818.8,1811.1 1295.3,1800.7 1539.5,1794.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1031.0,1815.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25484239147785,38.5599655413782]}},{"type":"Feature","properties":{"resourceCoords":[1524.0,1815.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25391406504369,38.55945859348032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__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_022 p22 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6432.0"},{"label":"split_canvas_h","value":"3906.8"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1017.1,144.9 514.5,139.7 271.3,140.9 16.4,137.2 17.6,874.6 1.0,890.3 1.0,975.7 1490.8,975.7 1516.9,881.1 1531.2,881.2 1521.1,139.4 1270.8,142.5 1017.1,144.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1017.0,872.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25768817158848,38.56149999850124]}},{"type":"Feature","properties":{"resourceCoords":[35.0,138.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25862940026269,38.56357842040327]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p23","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0023","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"430.8,1861.4 301.6,1119.4 295.3,1120.7 227.5,722.2 1114.2,470.1 1111.0,204.0 1372.6,197.3 1380.0,197.1 1382.0,726.0 1382.7,1730.5 1111.0,1745.0 430.8,1861.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1111.0,1745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2491381,38.5594944]}},{"type":"Feature","properties":{"resourceCoords":[1111.0,204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2466803,38.5615037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0024","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1163.4,1644.2 887.2,1659.7 616.4,1679.1 89.4,1709.4 82.8,1709.9 67.2,705.2 57.2,176.2 325.3,165.3 867.5,132.3 1413.4,97.4 1414.6,295.8 1418.6,615.8 1427.9,1200.1 1431.2,1625.4 1163.4,1644.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[875.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24482508192322,38.560183114640175]}},{"type":"Feature","properties":{"resourceCoords":[875.0,1651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24726512221562,38.55824701929358]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p25","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0025","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.9,1649.0 954.0,1770.0 1370.2,1834.4 1364.7,1143.0 1361.0,658.0 1396.9,655.2 1458.6,650.6 1057.2,1.0 1018.1,1.0 1016.9,151.6 914.4,151.6 910.4,148.5 427.4,157.7 201.1,160.1 204.5,661.2 207.9,1416.5 210.9,1649.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,1161.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2519325,38.5584536]}},{"type":"Feature","properties":{"resourceCoords":[1361.0,658.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2513838,38.5606796]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p26","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0026","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"285.1,1281.8 299.1,1199.8 278.6,745.3 256.6,632.8 200.9,426.9 136.2,158.8 891.6,165.6 1314.1,166.1 1326.4,446.0 1344.0,976.1 1356.9,1248.7 1365.8,1526.5 1378.1,1796.0 308.5,1787.0 285.1,1281.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[292.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2489418,38.5568339]}},{"type":"Feature","properties":{"resourceCoords":[1336.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2482052,38.5588635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p27","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0027","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1607.0,1114.4 1514.5,1154.2 1378.3,1194.0 1398.2,1255.8 637.8,1479.1 633.0,1460.5 620.0,1411.0 441.4,1481.6 295.9,1553.0 98.8,1674.2 86.6,1682.9 76.3,95.8 24.3,94.5 254.1,43.6 587.6,89.1 1158.7,53.8 1492.2,114.2 1543.6,255.3 1541.2,1041.5 1607.0,1075.8 1607.0,1114.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[620.0,1411.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2742586,38.5773487]}},{"type":"Feature","properties":{"resourceCoords":[971.0,106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2734514,38.5797241]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0028","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.4,412.7 133.6,195.7 147.5,131.3 198.3,131.8 574.7,151.2 1295.7,162.9 1607.0,364.2 1607.0,410.8 1607.0,431.1 1595.8,439.7 1502.7,544.2 1451.5,653.2 1398.5,868.9 1358.8,976.8 1289.4,1088.6 1214.3,1171.8 1129.8,1242.1 915.5,1392.0 846.6,1444.1 783.0,1498.1 717.2,1559.8 600.3,1688.0 505.9,1803.6 180.1,1216.9 176.4,1131.5 172.2,1065.8 152.3,835.1 149.0,759.7 125.4,412.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[173.0,1077.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27907109602415,38.572552303334014]}},{"type":"Feature","properties":{"resourceCoords":[173.0,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.280426596873,38.57386837101391]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0029","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"434.0,516.1 358.1,464.2 493.1,144.1 687.2,177.0 1017.9,55.9 1400.5,72.2 1525.0,291.9 1557.1,674.3 1538.1,1471.0 1450.5,1831.2 639.5,1843.7 639.9,1838.0 176.6,1848.5 217.2,1325.1 122.3,1016.6 266.9,916.2 256.5,853.7 434.0,516.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.28044916474197,38.58193781590212]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.276952501811,38.58296281604324]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.27537438045611,38.57962633326578]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.2788710433871,38.57860133312466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0003","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"373.8,233.9 886.5,229.4 886.6,219.0 1518.6,242.0 1519.4,401.8 1525.2,401.8 1525.2,402.8 1516.0,506.9 1549.8,1502.9 1517.5,1502.7 1515.0,1753.0 881.0,1787.8 881.0,1771.2 367.9,1774.1 367.8,1791.8 74.0,1794.8 72.6,1794.8 71.5,695.7 56.0,689.6 61.0,262.9 373.8,212.5 373.8,233.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[883.0,866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.262506001417,38.571475222145175]}},{"type":"Feature","properties":{"resourceCoords":[375.0,1797.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26137110884146,38.56979069182848]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0030","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.7,362.1 164.1,128.9 622.8,111.3 622.5,116.9 1425.6,91.9 1491.4,108.5 1539.7,126.9 1024.1,1614.9 944.8,1637.6 463.1,1785.8 236.7,1948.0 200.3,1935.1 189.6,1874.2 193.6,1811.0 186.2,1611.3 156.8,605.2 148.7,362.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[631.0,582.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27718018475132,38.57839169152619]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,46.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27574817816543,38.57983480130548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0031","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.0,241.8 1457.6,345.0 1555.4,655.1 1502.4,1420.1 1509.8,1666.5 1040.0,1681.2 611.4,1689.9 611.4,1684.7 115.1,1695.5 113.4,1181.2 61.8,1013.4 47.4,994.6 77.4,804.5 213.3,647.4 346.4,608.2 404.6,446.8 573.5,484.0 654.5,259.5 1064.6,177.5 1058.4,238.7 1398.2,329.6 1462.8,194.3 1578.2,204.2 1591.0,178.9 1602.0,241.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[610.0,1681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.28015571801824,38.57748214836421]}},{"type":"Feature","properties":{"resourceCoords":[1529.0,1681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27815570729983,38.57804626827651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0032","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"149.1,1845.5 58.0,1350.1 54.5,1112.2 55.4,614.4 52.1,134.8 554.2,122.1 554.2,127.4 987.9,117.2 1463.0,100.5 1493.5,1132.1 1501.0,1336.8 1497.0,1401.6 1508.0,1464.0 1520.4,1508.8 1537.2,1564.5 1440.8,1600.6 1347.8,1655.0 1308.0,1687.8 1278.0,1718.5 1263.5,1733.5 1240.4,1768.6 1217.9,1703.9 849.5,1614.2 149.1,1845.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,603.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27976975016962,38.576669945374285]}},{"type":"Feature","properties":{"resourceCoords":[1479.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27815270230671,38.57802093640097]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0033","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"97.7,1573.9 110.2,1531.6 143.1,1437.8 182.7,1318.7 165.8,1326.0 222.9,1224.3 323.2,815.9 427.1,675.7 377.1,627.2 369.9,516.3 282.8,427.3 331.4,239.9 299.7,118.4 414.3,126.7 473.5,225.2 686.9,325.3 683.4,403.1 799.3,474.2 974.7,311.6 1171.9,228.8 1235.5,161.4 1472.3,129.6 1473.2,127.2 1478.4,138.1 1486.7,226.6 1386.4,717.1 1334.4,961.0 1311.5,1077.8 1304.9,1330.0 1112.4,1344.5 1086.5,1347.5 1083.6,1381.1 1093.5,1491.9 1128.0,1666.7 1129.0,1672.4 1134.5,1704.8 1144.6,1751.4 831.4,1867.5 914.0,1813.3 690.8,1905.7 596.3,1948.0 556.4,1948.0 511.7,1845.0 242.2,1525.0 97.7,1573.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[599.0,660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.28404583711642,38.57504955491459]}},{"type":"Feature","properties":{"resourceCoords":[905.0,1149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2816858333779,38.574134424046974]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p34","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0034","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"166.8,303.6 124.7,383.6 108.9,436.0 104.5,527.6 95.0,1576.0 92.7,1854.7 210.3,1844.1 1602.0,1604.9 1602.0,1380.7 1602.0,1215.1 1365.3,421.5 1064.6,396.2 1120.5,329.2 1254.3,185.1 1419.3,1.0 1382.4,1.0 1269.5,86.7 1124.4,87.8 1126.7,195.6 855.7,330.1 567.9,257.4 166.8,303.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[95.0,1576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2828591,38.5686804]}},{"type":"Feature","properties":{"resourceCoords":[566.0,1576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.282237,38.569377]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p35","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0035","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1437.0,1784.1 1387.8,1948.0 1369.6,1948.0 1345.5,1948.0 1341.4,1911.2 1241.2,1797.7 1059.3,1705.9 724.8,1777.8 359.5,1779.8 239.7,1716.7 341.1,1448.6 285.9,847.0 178.9,644.4 165.3,466.1 278.8,365.9 763.7,231.2 1008.3,277.4 1027.5,268.7 1012.0,357.1 1013.0,411.4 1036.7,499.4 1346.0,1493.0 1437.0,1784.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[145.0,442.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2865598,38.5688789]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,1493.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2828591,38.5686804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p36","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.58"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0036","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1353.7,261.0 1316.3,727.1 1385.0,848.9 1490.8,916.0 1487.5,1204.7 1390.8,1325.0 1362.0,1501.7 1493.5,1583.7 1491.7,1864.3 1345.1,1904.8 1178.5,1893.0 946.6,1785.1 882.6,1796.3 866.1,1751.3 755.3,1666.5 674.0,1646.0 510.9,1641.5 459.6,1708.7 313.1,1670.6 206.3,1538.1 314.8,1408.4 316.8,1188.0 217.2,913.1 178.6,879.0 97.7,567.5 69.7,259.5 106.9,126.2 404.1,76.0 928.4,97.7 1139.5,69.5 1312.4,109.3 1422.8,170.6 1353.7,261.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[673.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.293353,38.5647999]}},{"type":"Feature","properties":{"resourceCoords":[897.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.292517,38.5652996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0037","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"418.6,1919.0 565.0,1839.3 565.1,1825.3 795.1,1826.4 1030.1,1828.5 1510.8,1797.5 1516.5,1622.2 1522.2,1280.8 1519.5,1161.3 1510.2,1077.4 1474.8,837.8 1411.5,413.5 1396.6,351.8 1314.4,118.8 1341.9,117.3 1307.0,74.8 1180.6,49.2 750.3,48.7 546.3,75.1 557.4,91.0 530.7,133.8 486.1,189.3 512.0,209.1 263.3,519.1 255.9,512.9 236.4,496.2 183.2,576.6 143.8,647.7 97.5,754.1 81.0,800.5 1.0,1039.1 1.0,1200.2 5.5,1201.9 32.6,1211.2 19.4,1260.2 14.5,1313.0 16.2,1338.5 21.7,1369.4 31.7,1395.4 69.0,1455.3 114.5,1495.7 211.2,1552.1 257.8,1586.7 301.9,1636.2 331.4,1684.4 353.4,1735.4 395.4,1860.4 410.7,1901.2 418.6,1919.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[422.0,653.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27396522135462,38.57649827935304]}},{"type":"Feature","properties":{"resourceCoords":[799.0,1434.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27459121840248,38.5733923052735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1938 | sanborn04858_022 p38","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0038","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"197.2,1797.2 267.3,1846.5 260.6,1866.6 261.1,1866.7 458.4,1909.0 643.5,1863.7 940.5,1863.8 1091.3,1900.3 1408.0,1909.5 1434.2,1948.0 1449.0,1948.0 1453.0,1948.0 1459.1,1701.8 1462.1,1580.5 1468.6,1465.5 1474.3,1227.8 1477.8,990.5 1483.5,708.2 1488.0,399.5 1491.3,275.3 1491.9,120.9 1493.3,86.5 1012.8,113.9 778.1,110.0 548.3,107.1 548.0,121.1 401.2,199.7 410.1,220.4 430.2,261.1 475.0,336.2 516.9,398.6 186.3,469.9 174.6,466.9 144.7,459.3 112.3,451.6 44.0,437.2 39.9,500.0 22.3,765.1 6.9,669.1 1.0,872.3 1.0,1044.1 67.2,1044.8 169.4,1681.9 178.4,1738.4 183.1,1796.9 197.2,1797.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1019.0,114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2747291,38.5717264]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,1460.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2779261,38.5675189]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p39","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0039","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"275.9,1461.8 283.6,1347.8 291.7,1112.2 297.6,877.0 306.2,597.2 313.9,291.2 447.4,293.2 962.7,296.9 1328.3,297.3 1341.9,340.4 1401.4,335.8 1401.5,353.1 1598.0,355.2 1598.0,489.9 1555.3,525.0 1598.0,553.8 1598.0,823.0 1585.0,824.0 1583.2,1479.7 1436.5,1520.0 1429.2,1579.8 1184.1,1580.8 888.0,1579.1 271.7,1581.9 275.9,1461.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.0,867.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2732317,38.5671466]}},{"type":"Feature","properties":{"resourceCoords":[1062.0,1580.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2741093,38.5644675]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p4","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0004","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1519.1,1.0 1487.1,1.0 1486.2,246.9 861.1,285.0 861.0,268.6 355.0,274.6 355.0,292.0 65.2,296.8 47.2,296.9 57.6,990.8 96.1,983.3 95.3,1715.8 283.1,1674.4 590.5,1608.6 856.4,1559.4 1057.3,1515.8 1471.7,1687.3 1471.3,1948.0 1476.4,1948.0 1485.8,1948.0 1484.3,1891.2 1540.8,1656.6 1458.1,1533.7 1525.6,1461.4 1560.7,1035.8 1519.1,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[898.0,1550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2582549,38.5693261]}},{"type":"Feature","properties":{"resourceCoords":[355.0,292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2613903,38.5697851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__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_022 p40 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.93"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3838.0"},{"label":"split_canvas_w","value":"6396.0"},{"label":"split_canvas_h","value":"3958.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.3,1904.4 404.3,1948.0 406.2,1948.0 624.6,1894.7 742.5,1947.7 900.5,1948.0 1350.6,1948.0 1370.2,1784.9 1429.1,1313.4 1455.4,1084.2 1298.6,1087.2 1203.0,959.5 257.1,959.5 235.7,999.1 280.9,999.9 95.0,1111.2 140.7,1110.5 122.1,1574.7 265.0,1567.2 230.3,1904.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1195.0,1333.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2687799,38.5606189]}},{"type":"Feature","properties":{"resourceCoords":[265.0,1567.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2729675,38.5618564]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__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_022 p40 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6396.0"},{"label":"split_canvas_h","value":"3838.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.5,408.4 72.6,806.8 97.5,942.5 271.6,954.3 376.5,936.9 404.1,904.8 720.7,954.4 1316.0,958.4 1418.7,924.5 1467.5,937.4 1506.0,598.9 1362.3,604.9 1386.0,138.7 1340.2,138.9 1528.2,29.1 1482.8,27.8 1497.6,1.0 1438.5,1.0 1438.6,12.8 1438.8,32.6 1275.5,79.0 1268.7,139.3 1021.7,142.6 723.4,143.5 102.5,151.9 96.0,397.8 77.2,397.8 84.5,408.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0040__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1172.0,378.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27367566908612,38.563200032467506]}},{"type":"Feature","properties":{"resourceCoords":[1501.0,611.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27301997960843,38.561828142380506]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0041","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1150.3,1871.7 1286.9,1755.0 1296.9,1738.2 1312.9,1620.0 1333.5,1368.2 1348.1,1296.6 1376.5,1026.6 1412.2,790.1 1435.2,555.7 1454.4,321.8 1475.2,86.2 1457.2,87.2 1456.5,1.0 1.0,1.0 1.0,37.1 85.0,145.2 170.5,142.0 242.8,139.3 220.6,370.5 170.2,846.1 153.5,1011.2 113.2,1012.2 130.8,1118.9 80.4,1499.7 106.4,1852.7 622.8,1887.5 922.2,1863.5 928.6,1872.4 1150.3,1871.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[768.0,826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26701192328439,38.557687666974026]}},{"type":"Feature","properties":{"resourceCoords":[768.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2663618389487,38.5583899675468]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0042","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"708.1,1862.1 706.7,1878.4 1249.4,1840.2 1270.7,1618.8 1280.4,1619.0 1364.5,968.8 1406.3,966.6 1457.2,489.7 1486.6,150.1 1262.8,122.0 1261.8,140.1 976.3,60.1 978.3,40.4 1023.3,34.3 992.2,1.0 292.2,1.0 293.5,75.5 311.6,74.5 292.6,311.2 275.2,546.2 254.1,781.9 220.2,1019.7 193.9,1291.0 179.8,1363.0 161.2,1616.1 146.1,1734.9 136.2,1751.8 1.0,1869.3 1.0,1870.2 708.1,1862.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1227.0,519.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26015510139638,38.55510357686282]}},{"type":"Feature","properties":{"resourceCoords":[156.0,1619.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2671512814386,38.554198265929514]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p43","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0043","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.2,1896.9 612.1,1829.6 611.6,1807.3 1281.3,1693.2 1513.0,1661.2 1495.3,895.6 1495.0,376.4 1497.0,39.0 1006.1,117.3 759.4,159.6 294.3,237.2 115.4,400.2 1.0,416.7 1.0,1948.0 43.2,1948.0 42.2,1896.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1037.0,915.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2550546,38.5583697]}},{"type":"Feature","properties":{"resourceCoords":[1497.0,39.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2528847,38.5589591]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p44","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0044","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"275.9,1046.3 289.4,528.8 300.4,192.4 1041.4,96.0 1269.2,64.5 1263.9,566.8 1273.2,1028.6 1273.7,1616.3 726.1,1628.2 726.1,1745.6 273.0,1810.0 275.9,1046.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1265.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2516766,38.5573786]}},{"type":"Feature","properties":{"resourceCoords":[273.0,1810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2554328,38.5567904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0045","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1478.5,1644.5 1477.3,1571.9 1474.7,1305.6 1472.0,362.6 1240.3,390.1 569.9,491.1 569.9,513.3 1.0,569.5 1.0,1416.5 87.9,1492.9 1.0,1513.5 1.0,1553.2 579.9,1655.0 578.2,1619.2 1026.0,1630.8 1026.2,1652.5 1478.5,1644.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1023.0,437.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25632457226818,38.55723678930773]}},{"type":"Feature","properties":{"resourceCoords":[1479.0,385.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25545576111693,38.55675153313503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p46","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0046","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1008.2,1747.0 739.0,1753.0 739.0,1744.9 284.6,1672.4 282.9,1559.3 280.8,1294.3 279.7,355.9 730.5,289.0 729.9,172.1 1275.0,157.0 1275.8,677.8 1279.5,983.5 1270.4,1216.4 1277.7,1748.0 1008.2,1747.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[739.0,1753.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2568175,38.5543294]}},{"type":"Feature","properties":{"resourceCoords":[1275.0,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2533916,38.5558445]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p47","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0047","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"228.0,1244.7 217.6,971.7 214.0,698.4 202.8,428.5 206.8,166.3 734.9,169.3 1328.3,169.5 1342.5,703.1 1359.1,1514.6 1359.0,1790.0 226.9,1788.5 228.0,1244.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[751.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2515157,38.5545839]}},{"type":"Feature","properties":{"resourceCoords":[1359.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2496406,38.5547493]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0048","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1074.3,1775.3 229.6,1778.2 228.8,1503.8 209.5,695.5 193.6,163.9 658.1,153.5 1163.3,157.8 1220.7,425.2 1270.7,630.8 1289.6,743.0 1298.4,1194.1 1282.5,1275.0 1292.9,1776.6 1074.3,1775.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[735.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25072754528243,38.55673293732058]}},{"type":"Feature","properties":{"resourceCoords":[1292.0,1235.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24894219208234,38.55683831812171]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0049","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"292.8,1246.4 273.2,431.6 263.6,167.3 801.0,160.1 1036.5,169.2 1345.8,165.6 1343.6,427.1 1356.7,696.2 1362.2,968.6 1374.4,1240.8 1377.2,1783.0 838.3,1788.8 675.5,1787.2 303.6,1789.5 292.8,1246.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[857.0,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25216044647851,38.55251179310495]}},{"type":"Feature","properties":{"resourceCoords":[288.0,705.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2549106001784,38.55306117642805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p5","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0005","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1198.7,146.6 1197.4,195.2 1468.8,262.4 1466.6,680.6 1482.2,686.5 1490.3,1784.1 1188.8,1785.6 644.0,1787.0 107.3,1794.2 110.5,636.5 139.3,453.4 312.4,144.9 1198.7,146.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[644.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2628414,38.568076]}},{"type":"Feature","properties":{"resourceCoords":[644.0,635.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2650381,38.5692333]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__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_022 p50 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.59"},{"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":"2536.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.7,1203.5 47.0,1743.2 46.9,1761.7 633.0,1700.5 633.0,1678.7 560.1,1615.6 586.2,1485.4 571.6,1025.2 611.8,740.0 577.9,144.4 479.5,222.2 355.6,83.6 120.1,116.1 94.7,1.1 90.6,351.4 93.3,429.0 89.0,529.5 88.2,551.9 83.2,691.8 73.5,988.0 64.7,1203.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[71.0,1462.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24707181175171,38.55687557601451]}},{"type":"Feature","properties":{"resourceCoords":[71.0,1728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.24787811467414,38.556170393920794]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__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_022 p50 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.81"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2536.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3848.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050","type":"ImageService3","width":1596,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1232.9,1887.7 1244.7,1877.2 1445.5,1889.0 1510.8,1816.0 1474.4,1307.3 1506.0,813.2 1410.8,356.9 1443.1,212.9 1315.6,102.0 1315.5,123.5 736.9,182.3 736.2,273.8 737.0,698.0 737.3,1264.4 738.8,1534.8 737.6,1616.5 737.8,1778.8 1232.9,1851.0 1232.9,1887.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0050__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[737.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2496406,38.5547493]}},{"type":"Feature","properties":{"resourceCoords":[737.0,164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2480056,38.5561872]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0051","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"169.0,786.1 163.5,130.5 616.1,124.3 616.6,165.6 1073.4,239.6 1073.4,247.8 1344.2,242.5 1347.0,242.5 1340.8,783.6 1332.4,783.9 1335.8,1315.1 1340.0,1315.0 1353.1,1847.3 1348.8,1847.5 1074.3,1846.8 1077.7,1608.5 619.5,1675.8 157.8,1739.1 169.0,786.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1079.0,1309.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25845166087727,38.55288451470786]}},{"type":"Feature","properties":{"resourceCoords":[34.0,1771.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2609782064556,38.55352431495579]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p52","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0052","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"647.0,1819.1 375.4,1822.4 119.0,1829.5 109.6,1298.8 105.5,1298.8 105.7,769.1 114.1,768.9 123.9,229.5 391.3,233.0 653.4,225.8 1461.6,213.9 1456.6,1272.5 1455.0,1795.4 914.9,1811.5 647.0,1819.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[917.0,1285.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2565758,38.5516055]}},{"type":"Feature","properties":{"resourceCoords":[917.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2549369,38.5530591]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p53","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0053","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1445.2,500.4 1447.2,917.5 1519.6,1032.6 1517.2,1613.1 1575.6,1678.8 1575.4,1695.2 1575.2,1721.3 617.0,1812.1 616.9,1790.0 72.0,1795.0 71.4,1268.4 72.0,202.4 614.5,194.3 614.4,146.0 1600.0,289.7 1600.0,362.8 1445.2,500.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[72.0,730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2547838,38.5516997]}},{"type":"Feature","properties":{"resourceCoords":[72.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.256422,38.5502589]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0054","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.3,1356.2 182.8,1357.0 383.9,53.5 468.2,51.3 939.8,43.2 1408.5,30.8 1376.4,269.8 1271.8,1203.0 1185.9,1915.5 916.7,1905.6 376.5,1890.5 100.5,1874.3 163.3,1356.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[165.0,1367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26301604689131,38.551793485478626]}},{"type":"Feature","properties":{"resourceCoords":[308.0,83.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26105740691156,38.55353576188941]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p55","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0055","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"245.7,1110.7 254.5,187.6 527.7,192.9 787.8,188.4 1059.0,187.9 1326.4,183.1 1323.0,708.0 1303.6,1773.3 748.1,1778.2 480.4,1795.2 232.9,1816.2 245.7,1110.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1323.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2581985,38.5501665]}},{"type":"Feature","properties":{"resourceCoords":[243.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2610066,38.5506415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p56","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0056","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1047.2,1746.0 773.0,1755.0 236.1,1768.6 238.0,695.2 232.8,166.4 775.8,146.9 1319.9,140.9 1320.8,272.0 1324.8,1204.5 1320.5,1740.5 1047.2,1746.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[773.0,683.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2572544,38.5495372]}},{"type":"Feature","properties":{"resourceCoords":[773.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2589093,38.5480872]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p57","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.44"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0057","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"325.6,1749.8 565.5,1744.2 577.2,1482.0 585.7,1481.9 587.1,1249.5 672.2,1480.3 676.1,1480.2 539.9,949.7 327.0,947.0 190.4,951.6 51.5,959.5 54.9,690.5 55.1,222.8 55.0,168.1 535.1,124.0 535.4,102.6 560.6,131.2 722.9,72.4 862.4,83.6 1063.3,170.0 1190.2,127.5 1284.2,233.8 1511.7,919.5 1552.2,1207.6 1542.6,1405.3 1502.5,1455.8 1498.3,1524.2 1557.6,1591.3 1576.5,1596.7 1576.3,1634.8 677.5,1758.6 325.0,1797.1 325.6,1749.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[327.0,947.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2569481,38.5468201]}},{"type":"Feature","properties":{"resourceCoords":[55.0,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2554717,38.5496102]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__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_022 p58 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.04"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4905.2"},{"label":"split_canvas_w","value":"2386.0"},{"label":"split_canvas_h","value":"2890.8"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"505.7,1850.8 505.4,1766.1 497.2,1546.2 502.6,1381.0 504.6,1335.5 293.4,1384.5 293.0,1367.3 38.0,1456.3 67.0,1486.1 15.9,1604.1 21.8,1610.0 26.6,1779.5 71.3,1814.8 57.2,1843.1 85.5,1876.0 212.9,1880.7 250.6,1913.7 347.3,1925.4 465.2,1901.8 498.2,1934.7 503.5,1948.0 505.7,1850.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[505.4,1766.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2703009,38.5457214]}},{"type":"Feature","properties":{"resourceCoords":[505.4,1315.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2686493,38.547012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__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_022 p58 [2]","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.83"},{"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":"6404.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"18.9,240.5 99.9,331.6 47.8,777.9 94.6,1185.6 256.9,1223.8 593.9,1225.0 595.2,1226.4 596.5,1226.3 596.5,1227.6 631.0,1261.2 648.4,1857.8 750.5,1900.3 852.5,1898.5 875.8,1924.7 939.9,1797.5 909.8,1762.7 1197.1,1680.8 1196.4,1700.0 1432.7,1659.5 1435.0,1637.1 1448.3,1487.4 1468.1,1407.7 1492.7,1349.5 1484.0,907.5 1463.8,909.1 1464.0,381.5 1463.3,110.8 1463.4,74.2 933.2,161.3 933.1,145.1 18.9,240.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0058__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[655.0,455.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2676989,38.5521383]}},{"type":"Feature","properties":{"resourceCoords":[935.0,426.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2666305,38.5515367]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0059","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1082.3,1721.0 906.9,1724.8 816.9,1840.5 786.6,1817.7 509.9,1840.2 245.2,1862.9 243.1,799.0 240.3,253.2 513.5,236.5 1046.2,187.7 1312.0,165.6 1315.0,414.1 1315.4,895.4 1345.9,955.4 1214.2,1188.8 1322.0,1185.9 1329.1,1716.5 1082.3,1721.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[781.0,744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26362899709918,38.54979589813017]}},{"type":"Feature","properties":{"resourceCoords":[1324.0,1190.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26337985859332,38.54853629358642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p6","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0006","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"106.0,1366.4 97.0,1372.0 93.7,214.8 625.0,209.0 1164.3,208.9 1446.0,208.2 1455.0,903.8 1493.5,896.2 1491.2,1630.4 1437.0,1642.2 1165.0,1690.0 1167.7,1496.4 301.0,1739.5 106.0,1366.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[625.0,209.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2628414,38.568076]}},{"type":"Feature","properties":{"resourceCoords":[1165.0,1690.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2592853,38.5673931]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0060","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"216.2,1230.7 108.0,1233.7 240.1,999.2 209.5,939.0 209.0,455.7 205.8,206.2 455.6,180.6 726.0,158.5 1287.6,143.6 1293.6,406.3 1298.3,1738.6 223.5,1763.7 216.2,1230.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[755.0,1223.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26243781921654,38.547905707401014]}},{"type":"Feature","properties":{"resourceCoords":[1290.0,1223.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26151711918509,38.54726127637377]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p61","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0061","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"243.6,440.7 238.9,178.1 777.5,166.4 1052.5,158.4 1326.7,153.9 1328.0,687.3 1331.0,900.8 1328.2,1187.5 1328.0,1747.0 1048.2,1754.7 241.7,1772.0 243.6,440.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1328.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2595687,38.5460046]}},{"type":"Feature","properties":{"resourceCoords":[1328.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2603795,38.5452889]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1938 | sanborn04858_022 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0062","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"200.9,1214.7 201.6,927.1 196.8,712.9 191.3,177.8 469.9,159.6 743.7,147.9 1042.9,149.1 1170.7,149.6 1453.5,1211.2 1445.6,1211.4 1270.8,750.1 1272.0,1216.1 1255.0,1216.5 1236.2,1742.5 755.2,1758.1 205.2,1776.0 200.9,1214.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[751.0,696.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25778035941595,38.54607730064277]}},{"type":"Feature","properties":{"resourceCoords":[751.0,1762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2594232618869,38.544649652009596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p63","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0063","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"192.3,1516.9 235.7,1354.8 287.9,1236.8 285.9,333.7 513.0,318.6 793.6,301.5 823.8,325.1 917.3,209.8 1095.1,209.4 1325.6,209.8 1331.3,1806.0 1315.3,1805.8 439.9,1820.4 159.9,1822.1 192.3,1516.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[265.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2676637,38.5476201]}},{"type":"Feature","properties":{"resourceCoords":[1325.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2658231,38.5463829]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p64","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0064","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"736.4,1794.1 242.9,1798.9 201.7,214.2 221.1,213.8 1297.5,186.2 1299.9,723.8 1303.0,858.6 1303.5,1242.5 1308.6,1782.4 736.4,1794.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[765.0,737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2640591,38.5464609]}},{"type":"Feature","properties":{"resourceCoords":[227.0,1799.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2666186,38.5456856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p65","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0065","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.6,1812.5 750.0,1810.0 483.3,1810.8 212.8,1807.8 222.9,1265.8 233.3,880.4 234.0,745.0 246.9,205.3 1058.9,204.9 1340.7,203.1 1334.0,501.4 1328.2,886.1 1310.6,1585.4 1308.0,1808.0 1026.6,1812.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1318.0,1273.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2620096,38.5438508]}},{"type":"Feature","properties":{"resourceCoords":[234.0,745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2631217,38.5458337]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p66","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0066","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.7,1574.2 214.9,877.2 215.6,493.9 218.2,196.5 768.3,187.1 766.4,281.9 1316.0,225.5 1305.2,1231.1 1303.5,1231.0 1299.0,1776.4 767.0,1789.0 490.4,1792.5 326.8,1791.1 207.1,1796.0 206.7,1574.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[215.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2611904,38.544571]}},{"type":"Feature","properties":{"resourceCoords":[767.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2618396,38.5424761]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0067__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_022 p67 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.74"},{"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":"6404.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0067__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0067","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"598.0,1473.0 594.4,1473.0 593.0,1734.0 1577.8,1736.1 1577.4,1712.8 1505.0,1628.8 1497.5,1552.2 1519.8,1006.0 1482.4,662.4 1497.8,419.7 1426.5,427.6 1322.7,307.1 1232.4,145.8 1258.4,113.7 1041.0,49.2 1040.4,87.0 148.7,198.4 70.7,205.9 62.2,702.6 61.5,702.5 57.5,971.9 325.6,970.2 480.8,968.5 598.0,1218.8 598.0,1473.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0067__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[598.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2581679,38.5413184]}},{"type":"Feature","properties":{"resourceCoords":[598.0,1473.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2605132,38.53919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0068","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1525.2,1579.1 1479.2,1592.0 1245.1,1925.8 1230.0,1908.8 602.2,1902.8 120.3,1687.4 108.1,1538.4 130.3,1274.8 141.3,1084.0 152.9,587.8 187.8,216.4 203.2,68.9 482.4,63.0 1355.2,35.3 1351.5,1063.0 1318.4,1063.8 1448.0,1579.5 1525.2,1579.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.27029971404666,38.54572049966251]}},{"type":"Feature","properties":{"resourceCoords":[1342.0,571.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26745668331313,38.54498124865138]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p69","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.64"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0069","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1585.0,299.8 1585.0,318.0 1588.0,345.0 1596.1,345.7 1595.3,371.5 1590.0,372.0 1590.0,388.0 1594.7,388.5 1594.2,406.7 1586.0,409.0 1586.0,427.0 1591.0,434.0 1591.0,470.0 1592.1,470.1 1588.5,585.0 1588.0,585.0 1583.0,590.0 1583.0,609.0 1587.0,610.0 1587.5,613.3 1582.8,762.1 1582.7,775.9 1582.0,776.0 1581.7,858.0 1577.2,1252.2 1566.4,1251.8 1567.1,1255.0 1572.4,1514.7 1565.0,1782.0 1050.5,1762.0 1050.0,1802.6 73.6,1717.9 32.6,732.4 84.3,526.5 155.8,496.6 152.3,153.4 580.1,147.7 790.9,41.8 1229.7,84.6 1263.9,56.5 1585.0,299.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1057.0,1225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2678938,38.5416367]}},{"type":"Feature","properties":{"resourceCoords":[1565.0,1782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2661445,38.541707]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p7","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0007","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.3,1058.1 170.0,981.0 214.0,930.2 278.4,882.0 358.5,473.4 1187.6,237.0 1185.7,430.8 1430.0,386.9 1445.8,1814.2 1203.0,1814.7 659.0,1817.0 151.3,1817.5 154.1,1546.0 142.3,1058.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[659.0,618.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2596103,38.5664111]}},{"type":"Feature","properties":{"resourceCoords":[659.0,1817.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2573054,38.565192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0070","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,276.2 1.0,822.8 1.9,869.6 10.1,1266.7 1.0,1269.5 1.0,1300.5 13.7,1531.3 14.7,1800.7 516.5,1803.0 1038.5,1807.7 1547.2,1808.1 1542.2,1542.5 1540.8,1273.2 1536.3,701.0 1537.7,191.7 514.6,183.0 514.0,150.0 1.0,276.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1022.0,1267.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2655383357307,38.54370755637954]}},{"type":"Feature","properties":{"resourceCoords":[1510.0,187.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2666688614093,38.54565365562466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p71","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0071","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1681.9 1.0,1734.7 383.7,1793.8 383.6,1773.7 1054.7,1829.8 1054.6,1869.8 1565.0,1836.5 1564.0,1775.0 1561.1,1775.0 1553.1,1244.8 1560.8,1244.9 1559.8,690.4 1545.5,690.0 1545.6,418.7 1549.0,144.0 1034.8,136.1 1035.3,176.7 58.3,115.0 39.8,1648.4 1.0,1681.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1549.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2661445,38.541707]}},{"type":"Feature","properties":{"resourceCoords":[1564.0,1775.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2632484,38.5397896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0072","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"12.0,1778.0 9.3,1243.0 17.1,1243.2 21.8,683.8 7.3,683.2 10.2,409.6 16.5,132.5 518.2,144.1 1040.0,158.4 1548.7,168.2 1545.3,443.6 1549.2,723.8 1552.0,843.5 1548.1,1007.0 1547.1,1283.5 1551.2,1815.2 14.9,1778.0 12.0,1778.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[521.0,155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26535411201475,38.5423757957692]}},{"type":"Feature","properties":{"resourceCoords":[1519.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.26098040336039,38.5418419415438]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p73","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0073","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"252.5,1736.5 254.0,209.5 793.0,199.0 1030.6,193.3 1104.8,191.5 1347.2,691.5 1349.9,899.0 1354.0,1202.4 1346.7,1202.6 1350.9,1727.2 1281.2,1729.5 790.5,1735.3 790.6,1720.7 252.5,1736.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[253.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2624592,38.5404854]}},{"type":"Feature","properties":{"resourceCoords":[793.0,199.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2599442,38.5412286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0074__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_022 p74 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.14"},{"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":"4500.4"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0074__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0074","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"237.1,91.7 194.9,126.5 149.2,108.3 107.8,132.3 53.6,264.0 42.3,891.1 102.8,1229.0 87.9,1685.4 118.2,1839.0 333.0,1870.4 694.0,1831.8 1032.7,1852.4 1052.8,1785.1 1028.2,1784.5 1056.3,441.4 1064.0,441.7 1065.0,189.6 794.1,201.9 794.5,180.7 439.4,143.9 439.2,154.6 236.5,119.1 237.1,91.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0074__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[809.1,431.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2630391,38.538513]}},{"type":"Feature","properties":{"resourceCoords":[1065.1,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2632484,38.5397896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0008","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.5,367.3 333.4,316.6 643.1,254.0 911.1,207.7 1113.5,166.2 1528.2,343.6 1524.9,605.8 1539.4,605.9 1553.4,1644.3 1501.1,1822.3 1052.8,1815.0 65.7,1803.0 57.5,1802.9 61.6,371.9 89.5,367.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[925.0,205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2582784506749,38.56927739810551]}},{"type":"Feature","properties":{"resourceCoords":[1505.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.25442551064074,38.568556141853335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_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_022 p9","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T14:49:58Z","modified":"2026-10-18T14:49:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0009","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.3,1556.9 287.9,573.9 289.1,127.4 298.8,130.1 502.0,46.5 1252.1,119.4 1255.2,329.7 1255.5,714.5 1262.9,1044.4 1266.2,1306.7 1272.7,1562.3 1272.2,1804.8 771.2,1805.2 570.8,1800.3 334.1,1801.5 289.7,1807.6 289.3,1556.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858193812:04858_12_1938-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[289.0,1303.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.255947,38.5667726]}},{"type":"Feature","properties":{"resourceCoords":[289.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2544056,38.5685558]}}]}}]}