{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01824_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Des Plaines, Illinois | 1956 | 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":"57"},{"label":"placed","value":"45"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef-snap 33, georef 10, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 21 panels"},{"label":"unplaced pages","value":"p14__2 (tier 1, 42.03980,-87.89988 +/-121m); p20__2 (tier 1, 42.02945,-87.87893 +/-105m); p26__2 (tier 1, 42.04990,-87.91782 +/-177m); p31__2 (tier 1, 42.03661,-87.87989 +/-117m); p32 (tier 1, 42.04074,-87.87697 +/-265m); p34__2 (tier 1, 42.04785,-87.89259 +/-134m); p43__2 (tier 1, 42.01232,-87.87377 +/-230m); p44__1 (tier 1, 42.02365,-87.88329 +/-228m); p45__1 (tier 1, 42.02222,-87.91057 +/-247m); p45__2 (tier 1, 42.03545,-87.91736 +/-343m); p45__3 (tier 1, 42.02196,-87.91389 +/-252m); p45__4 (tier 1, 42.02092,-87.91027 +/-355m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0001","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"244.8,311.6 74.3,206.5 110.5,180.6 166.9,155.8 559.2,139.4 1564.0,102.4 1563.8,266.7 1553.9,857.4 1553.9,914.7 1558.9,1099.3 1560.4,1210.6 1553.5,1240.2 1466.3,1395.1 1100.8,1995.8 550.3,1664.6 460.4,1631.6 484.1,1487.7 488.9,1348.2 465.1,1205.2 528.8,1194.1 689.3,1147.1 745.4,1150.2 777.0,1170.0 389.2,400.6 340.9,370.9 244.8,311.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[540.0,1660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89180820860572,42.04129082203748]}},{"type":"Feature","properties":{"resourceCoords":[536.0,516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89185171879315,42.0433886560128]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0010","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.8,1711.9 135.4,1034.5 186.9,1017.2 880.7,851.1 880.7,799.1 880.6,655.6 880.5,511.6 880.5,483.6 880.4,369.0 884.5,153.9 895.6,129.2 1245.7,125.9 1347.4,124.3 1488.3,122.1 1491.6,1453.5 1492.0,1729.0 1493.4,1945.8 881.6,1946.7 753.9,1946.9 634.5,1947.1 318.9,1887.7 291.4,1713.6 241.6,1713.3 221.8,1711.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[877.0,945.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88972329723732,42.034186530123705]}},{"type":"Feature","properties":{"resourceCoords":[337.0,1944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89211307943648,42.03046319951116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p11","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0011","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"195.5,135.9 196.3,1455.6 196.2,1728.6 197.2,1943.6 464.9,1943.7 591.6,1944.6 1492.1,1980.0 1435.9,1798.0 1436.3,1753.7 1421.8,1752.5 1416.0,1733.4 1407.0,1699.8 1380.3,1599.2 1375.2,1580.1 1371.0,1564.2 1199.9,1.0 1134.3,1.0 1020.2,102.6 1025.0,130.2 823.8,131.4 641.8,132.1 466.4,132.8 195.5,135.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[196.0,952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8867277,42.0342979]}},{"type":"Feature","properties":{"resourceCoords":[657.0,381.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8846043,42.0364762]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0012","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1530.9,2020.8 1243.2,2034.0 1106.1,2040.3 1061.8,2057.0 683.9,2072.6 683.3,2067.2 305.8,2072.7 194.8,2053.6 161.7,2009.0 230.2,1631.8 205.2,1454.1 142.9,1320.5 210.0,1235.7 209.0,691.6 271.9,691.9 298.1,651.3 298.7,518.1 221.2,477.0 222.5,225.3 184.4,225.7 180.9,100.2 517.1,94.7 517.2,99.5 1111.7,89.7 1111.4,96.5 1338.1,85.9 1414.6,84.7 1452.5,585.8 1474.5,586.6 1492.5,600.9 1494.6,626.6 1478.4,693.7 1472.5,747.3 1464.0,738.3 1482.5,984.2 1458.7,1005.9 1474.0,1021.1 1478.8,1038.8 1481.7,1496.2 1468.2,1496.8 1468.8,1762.0 1449.6,1762.8 1529.1,2015.0 1530.9,2020.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[886.0,1530.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91009493498328,42.03984673212914]}},{"type":"Feature","properties":{"resourceCoords":[1481.0,1530.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90717508883085,42.03985760783522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0013","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.3,160.9 606.5,139.1 687.8,100.9 796.7,199.9 937.9,198.2 1241.3,90.5 1449.6,88.0 1459.8,195.8 1457.7,195.9 1485.6,2039.4 1234.7,2052.1 988.8,2068.5 738.8,2083.6 504.5,2099.0 420.8,2099.0 412.7,2099.0 328.5,1847.1 347.8,1846.1 342.6,1579.9 356.2,1579.0 345.4,1119.9 340.3,1102.3 324.6,1087.2 348.2,1065.1 325.3,818.5 334.1,827.4 339.1,773.5 354.1,705.9 351.6,680.1 333.3,666.0 311.1,665.7 264.3,160.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1475.0,1267.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90168536298225,42.041064087378935]}},{"type":"Feature","properties":{"resourceCoords":[1475.0,740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90165409712162,42.04297707252087]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p14 [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":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0014__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0014","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"110.3,2053.5 366.2,2041.4 617.0,2028.2 948.1,2018.2 1382.7,1996.5 1473.7,1994.9 1528.7,1994.0 1549.6,1994.5 1395.0,1460.0 1381.5,1462.1 1198.2,675.4 1201.2,675.2 1080.3,86.3 811.5,95.6 624.4,42.6 208.6,45.1 141.0,86.2 103.8,86.0 112.4,194.9 110.3,195.0 110.3,2053.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[622.0,1492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89920629765079,42.0402873613906]}},{"type":"Feature","properties":{"resourceCoords":[622.0,712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89921761158591,42.04309636283563]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0015","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"692.6,2043.3 229.4,2067.6 233.9,2038.2 231.7,1814.3 338.0,1703.2 295.5,1650.2 273.3,1611.6 245.3,1539.4 234.5,1481.5 232.1,1419.6 231.7,1065.0 235.3,640.1 251.6,566.8 267.2,527.4 302.5,468.4 337.6,426.4 233.5,347.2 233.1,91.8 475.4,78.6 722.1,66.5 964.7,53.0 1212.2,43.1 1448.5,31.0 1445.9,675.5 1460.4,675.6 1454.7,1331.4 1462.3,2002.9 1183.9,2017.5 1080.3,2023.8 730.7,2041.3 692.6,2043.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[288.0,364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90626332552016,42.03708206226653]}},{"type":"Feature","properties":{"resourceCoords":[1459.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90045909691348,42.03591363679272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0016","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.5,77.3 456.9,67.4 784.8,61.7 1215.2,45.6 1227.2,45.5 1373.7,750.6 1417.6,751.6 1452.9,752.5 1405.5,832.9 1398.8,850.0 1392.1,898.0 1423.6,1414.0 1380.6,1413.3 1164.1,1410.0 1085.5,1926.8 1083.3,2031.6 1259.5,2025.1 1412.9,2019.5 1412.3,2044.5 281.3,2073.8 281.3,2069.7 175.0,2073.4 178.7,1393.8 195.5,730.3 180.8,730.0 194.4,77.8 208.5,77.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[439.0,1401.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89920826511874,42.03350341234379]}},{"type":"Feature","properties":{"resourceCoords":[188.0,739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90048845759785,42.03589764429684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p17","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0017","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"366.9,2049.9 365.6,2043.3 204.3,2031.3 121.0,1935.1 166.4,1624.8 121.1,1574.6 119.0,1047.2 276.4,1047.3 336.4,1047.3 482.7,468.5 487.1,384.4 487.5,377.2 451.7,377.1 385.7,64.0 506.5,65.2 508.0,40.5 819.2,62.8 862.0,65.9 911.3,66.2 938.4,238.4 1250.5,297.4 1368.6,297.3 1495.0,297.2 1495.0,1917.7 1495.0,2039.7 414.6,2017.8 412.7,2050.7 366.9,2049.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1495.0,1382.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8891767,42.0265754]}},{"type":"Feature","properties":{"resourceCoords":[1495.0,1721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8890905,42.0253322]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p18","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0018","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"523.9,1931.8 481.4,1931.7 310.1,1930.3 309.7,1789.1 305.9,160.8 914.0,158.9 1182.6,158.1 1309.6,158.6 1296.1,466.0 1246.7,1590.3 1235.7,1824.7 1230.7,1933.6 904.6,1930.9 733.5,1931.3 523.9,1931.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[918.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8862634,42.0279215]}},{"type":"Feature","properties":{"resourceCoords":[918.0,1931.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8860173,42.0242022]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0019","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"269.1,1945.2 171.4,1945.2 181.2,1717.1 226.5,584.1 238.2,290.9 238.9,274.3 1149.1,303.3 1155.1,322.6 1227.9,554.4 1242.2,603.4 1386.5,1057.1 1385.7,1057.1 1342.6,1397.7 1265.1,1397.4 1185.3,1701.7 1172.7,1989.9 669.8,2038.7 668.5,2070.0 525.1,2067.2 437.6,2065.9 316.2,2064.6 315.8,1974.4 269.1,1945.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[686.0,1387.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.882095159588,42.02678353703117]}},{"type":"Feature","properties":{"resourceCoords":[200.0,290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88470740774339,42.030678587950305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0002","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1131.2,209.9 1310.4,205.6 1339.5,196.3 1435.2,137.6 1449.5,256.8 1442.0,921.7 1456.8,977.9 1457.1,1135.8 1450.5,1636.5 1444.0,1860.8 1423.6,1921.4 1103.7,1918.9 290.8,1905.5 301.4,1847.0 319.9,1566.0 371.2,1413.0 316.0,1412.5 392.7,1266.5 423.0,1172.4 430.8,1099.5 433.9,909.1 402.0,716.5 417.6,597.0 422.6,202.8 1131.2,209.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1114.0,909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88806750647477,42.04113231845078]}},{"type":"Feature","properties":{"resourceCoords":[1114.0,1914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88593671196062,42.040216140035845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p20 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.81"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1855.2 1.0,1859.0 166.2,1867.5 162.6,1929.2 408.6,1936.8 408.1,1945.5 721.8,1957.4 714.1,1931.7 937.2,2030.2 939.2,2012.9 1167.1,2037.5 1301.3,2019.5 1318.2,1983.6 1362.9,1978.8 1369.9,1860.9 1506.9,1795.1 1510.7,1669.6 1475.6,1575.1 1492.2,1420.8 1406.1,1375.0 1425.5,1172.7 1340.5,1171.4 1334.5,1148.8 1318.2,1173.8 1200.5,1163.1 1179.7,1139.7 1170.5,1168.7 1118.9,1165.7 1040.4,1133.0 1037.2,1133.0 1037.2,1131.7 1035.9,1131.1 1026.8,786.7 1016.5,793.9 1003.2,781.3 1009.8,512.0 1046.8,510.6 1038.4,465.7 795.4,384.7 629.9,119.7 630.0,118.3 420.3,146.3 173.6,186.6 242.5,417.6 256.0,466.4 392.9,918.7 392.1,918.7 344.6,1256.1 267.7,1254.7 184.2,1555.5 167.7,1841.4 1.0,1855.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[502.0,1259.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8781161,42.0268756]}},{"type":"Feature","properties":{"resourceCoords":[604.0,1606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8775141,42.0256318]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p20 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.73"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4148.8"},{"label":"split_canvas_y","value":"3152.0"},{"label":"split_canvas_w","value":"2451.2"},{"label":"split_canvas_h","value":"1380.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1098.2,1085.4 1102.0,1098.4 1104.1,1105.5 1357.7,1064.8 1361.0,1064.3 1579.4,1035.8 1593.1,876.2 1042.2,847.4 1042.2,847.5 1041.4,895.0 1098.2,1085.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0020__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1373.1,1068.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.878783570562,42.03090675680131]}},{"type":"Feature","properties":{"resourceCoords":[1091.2,1095.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88010559059623,42.03075058128873]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0021","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.9,114.2 222.1,81.2 1304.2,48.4 1305.2,66.9 1475.9,60.0 1475.0,1046.2 1484.3,1045.8 1452.8,1343.2 1421.2,1427.5 1401.2,1548.8 1433.0,1668.2 1522.3,1996.2 1483.2,1994.6 1453.7,2042.4 1394.8,2053.4 980.4,2066.7 933.2,2067.4 231.5,2048.7 180.3,1710.1 210.1,1349.5 169.6,1257.5 214.2,782.8 203.7,223.4 176.0,115.8 221.9,114.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1226.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88939325163336,42.02224390307959]}},{"type":"Feature","properties":{"resourceCoords":[477.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89308455297312,42.01853192059552]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0022","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"147.9,1696.2 116.4,1576.3 136.9,1454.7 168.8,1370.3 201.5,1072.0 192.1,1072.3 196.3,83.1 238.8,81.2 261.8,80.2 700.1,223.7 700.2,202.4 944.7,203.6 944.7,197.1 1096.9,126.3 1093.7,46.7 1214.2,43.1 1286.5,41.2 1442.6,184.1 1440.8,531.3 1433.4,2014.6 1375.1,2043.5 1024.2,2060.5 236.4,2025.5 147.9,1696.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[941.0,1052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8844797087717,42.02059234791702]}},{"type":"Feature","properties":{"resourceCoords":[941.0,1544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88446956220933,42.01879457948813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0023","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.2,568.8 208.2,2061.1 216.5,2057.1 1331.2,2047.3 1331.3,2049.5 1649.0,2041.4 1649.0,2023.0 1561.7,2026.9 1559.8,864.3 1513.6,600.2 1469.3,559.0 1449.5,246.8 1475.5,243.3 1476.0,180.2 1505.8,176.7 1509.0,123.7 1279.6,36.2 1288.7,61.6 972.9,65.9 972.8,57.1 725.2,62.2 725.7,1.0 522.8,1.0 225.7,41.0 225.6,72.3 82.4,74.8 67.8,75.2 224.3,219.5 221.2,568.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1215.0,803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.87716472621452,42.02168074674438]}},{"type":"Feature","properties":{"resourceCoords":[470.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88079660841086,42.02070410066116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0024","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"785.9,1697.1 793.4,1701.5 906.5,1769.2 967.6,1805.6 953.4,1835.2 401.6,1924.2 225.0,1343.9 183.8,1317.8 193.0,778.1 201.0,438.2 228.1,81.3 280.4,48.4 1205.2,35.9 1397.9,78.8 1454.3,358.0 1453.5,630.0 1450.0,630.2 1446.0,721.4 1443.1,1238.6 1442.8,1291.6 1251.4,1395.0 1251.1,1395.2 691.8,1638.2 768.9,1686.5 785.9,1697.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[814.0,1384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.912120754084,42.05369483596181]}},{"type":"Feature","properties":{"resourceCoords":[300.0,1384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91463467714114,42.05367504099438]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0025","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1106.1,1963.7 1099.1,1938.2 1378.4,1906.2 1390.1,1946.4 1384.8,2004.2 1418.5,2023.6 1536.8,1845.1 1398.2,1837.2 1350.4,1738.9 1348.2,1435.2 1414.8,989.9 1347.2,835.3 1349.9,679.9 1324.5,667.7 1242.4,771.7 1084.0,750.3 1054.4,482.4 1065.6,123.8 1097.0,80.6 840.5,103.3 497.4,70.5 383.6,136.2 313.4,133.2 309.2,233.1 217.6,299.6 251.3,378.8 310.4,381.2 334.0,437.7 326.7,792.9 259.6,1249.3 336.9,1348.8 328.6,1548.3 273.7,1623.8 279.6,1838.8 228.4,1910.8 1.0,1903.0 1.0,1906.5 90.7,1913.2 605.6,1932.0 658.4,1934.0 681.0,1979.1 1106.1,1963.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[978.0,1674.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90770993167409,42.05293003351476]}},{"type":"Feature","properties":{"resourceCoords":[737.0,546.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90222598862333,42.05397838630924]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0026__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p26 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0026__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0026","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"192.8,754.6 198.6,1065.8 257.0,1228.8 255.3,1326.0 203.3,1418.8 203.7,1807.7 241.8,1894.8 359.8,1947.3 752.2,1946.9 887.8,2021.3 1362.0,2022.9 1339.4,583.4 1189.0,614.3 1183.8,586.5 746.8,680.2 192.8,754.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0026__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[325.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91882116595092,42.045384945745816]}},{"type":"Feature","properties":{"resourceCoords":[1182.0,606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91460233258573,42.049883177056316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0027","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"244.2,655.0 435.8,612.8 350.4,175.8 374.7,172.1 375.2,198.0 837.2,223.9 860.9,169.3 1283.7,292.2 1316.6,312.7 1497.2,425.9 1494.2,519.8 1400.6,617.7 1371.6,816.2 1360.0,1077.6 1386.8,1251.2 1352.8,1999.2 761.2,2002.5 761.1,1997.7 426.5,1999.5 403.5,651.6 249.6,683.5 244.2,655.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[758.0,1250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91201506370912,42.04780825860343]}},{"type":"Feature","properties":{"resourceCoords":[1048.0,1826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9105396886025,42.04571639841685]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.30"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0028","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1389.1,1209.0 1417.1,1171.4 1419.6,1161.7 1457.6,1098.8 1504.1,1038.2 1511.5,1028.0 1484.1,479.1 1429.5,491.6 1441.7,1.0 1437.8,1.0 1433.7,65.6 1400.0,109.0 1224.6,120.3 867.6,87.6 597.1,108.0 367.7,81.5 304.6,131.7 273.8,215.6 288.9,377.6 210.7,456.9 225.3,644.6 159.3,845.4 175.5,1136.0 132.3,1293.2 152.3,1947.7 235.0,2011.8 373.0,2047.5 792.7,2048.4 870.0,2016.8 902.1,2017.5 907.0,2009.5 907.9,1969.9 1346.0,1251.3 1362.8,1246.5 1389.1,1209.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88419132714361,42.05499271493975]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88403159356754,42.04889415505353]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,2100.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.89441139497488,42.04874213350078]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2100.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.89457112855095,42.054840693387]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p29","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.20"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0029","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"293.1,1906.8 304.6,1172.7 284.9,1182.4 296.6,958.5 279.1,951.2 288.0,786.7 297.0,553.0 305.4,297.7 310.2,111.0 304.1,75.5 471.4,36.5 815.4,56.8 1097.4,116.2 1208.0,178.0 1501.4,186.8 1514.0,286.2 1455.2,321.6 1440.2,436.8 1519.5,904.0 1531.6,1639.4 1506.0,1758.8 1470.6,1764.3 1477.2,1884.7 1197.5,2088.4 773.8,2089.8 293.1,1906.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[297.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8828835,42.0477751]}},{"type":"Feature","properties":{"resourceCoords":[297.0,54.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8827434,42.049659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0003","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.2,145.7 335.9,117.4 799.2,633.9 854.0,609.3 1381.0,977.5 1406.9,1035.4 1346.8,1052.2 1165.2,1487.1 1088.9,1504.1 1132.3,2030.0 803.6,2047.3 798.1,2062.1 738.9,2041.7 444.3,2041.7 136.7,2035.4 156.7,1974.5 161.2,1749.5 163.3,1247.4 161.6,1089.1 146.3,1032.9 147.8,366.1 132.4,246.8 289.2,145.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1174.0,505.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88747085807458,42.04373015268102]}},{"type":"Feature","properties":{"resourceCoords":[177.0,2040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88548123456903,42.04075551112197]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.40"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0030","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.3,1227.8 146.2,1851.3 217.9,1946.2 175.7,1992.6 198.1,2009.5 397.6,1979.5 754.0,2048.3 1084.8,2064.1 1325.2,2056.3 1430.7,2010.4 1498.1,1466.7 1446.5,631.4 1481.2,440.8 1409.2,345.5 1506.0,262.7 1419.2,135.1 1426.0,129.9 1072.3,1.0 11.6,1.0 107.6,480.7 165.3,1234.6 174.3,1227.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[143.0,1246.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.87670587344519,42.03656355530857]}},{"type":"Feature","properties":{"resourceCoords":[771.0,798.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.87660598614728,42.03926259194849]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p31 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0031__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0031","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"315.6,1814.7 317.0,1819.7 319.8,1829.2 346.1,1921.7 355.8,1955.9 361.9,1974.6 916.0,1988.4 916.2,1984.9 1270.3,2035.3 1314.4,2038.2 1524.2,2013.7 1572.5,1707.2 1584.0,1271.5 1545.0,988.3 1649.0,990.5 1196.1,587.6 1195.8,598.5 589.9,179.0 246.9,1.0 1.0,1.0 1.0,8.8 16.4,25.8 35.4,61.7 60.6,89.2 69.9,98.2 77.8,156.1 38.5,192.3 104.2,191.2 306.9,1784.0 311.5,1800.2 315.6,1814.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[271.0,1668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88097283693749,42.032695724081954]}},{"type":"Feature","properties":{"resourceCoords":[1366.0,1307.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.87574306389186,42.03412884563796]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0033","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1434.6,1919.7 689.8,1697.0 654.6,1705.9 586.5,1701.1 569.3,1699.9 531.1,1708.5 364.9,926.4 368.4,875.4 357.8,776.0 314.1,687.2 223.8,262.6 251.1,283.2 319.3,334.9 433.2,436.7 1476.5,187.2 1510.2,187.1 1467.0,679.0 1431.2,1025.0 1467.5,1042.2 1419.7,1513.0 1462.1,1494.5 1434.6,1919.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1472.0,1025.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88298811409148,42.04627490458319]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88297569935918,42.04775603435652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0034__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p34 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.10"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0034__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0034","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"803.5,1214.7 504.7,2072.2 520.5,2071.4 806.7,2057.8 806.5,2039.2 1316.9,1695.5 1315.8,1132.6 1294.2,1132.8 1164.5,872.8 1047.5,1134.4 1025.8,1134.6 880.5,1135.6 853.7,1138.7 828.0,1151.2 812.5,1167.8 803.5,1214.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0034__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1333.0,1552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89177481929248,42.047670210569514]}},{"type":"Feature","properties":{"resourceCoords":[1333.0,1103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8917703522543,42.0485374529747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.47"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0035","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1493.6,337.9 1245.1,1149.0 1349.7,1196.2 1286.9,2085.5 1270.8,2085.6 1236.8,2085.7 1094.3,1075.0 1038.2,1046.8 966.4,1162.2 867.1,1320.8 832.8,1375.6 824.1,1389.8 820.9,1394.6 803.1,1421.8 770.8,1471.2 708.0,1567.3 264.9,489.5 118.5,205.4 124.7,205.1 933.4,166.8 919.6,118.1 1454.7,50.7 1477.8,127.5 1469.0,238.6 1534.0,275.1 1493.6,337.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[956.0,378.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90964338559418,42.052364684949104]}},{"type":"Feature","properties":{"resourceCoords":[221.0,2308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.91463779689474,42.053649085825114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0036","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"287.9,1176.5 251.7,1115.2 206.6,1038.9 1257.1,36.9 1340.7,169.9 1399.1,262.9 1451.0,353.8 1450.6,531.2 1431.4,1180.7 1445.7,1834.3 1475.5,1899.3 905.3,1906.8 619.3,1898.1 265.8,1896.5 273.9,1879.2 272.1,1176.8 287.9,1176.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1445.0,554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89413858440615,42.038289433412594]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,1891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89135404036335,42.037045712539616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0037","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"558.1,2015.3 462.6,2000.2 428.8,1986.3 283.3,1897.0 660.0,1312.7 676.0,1302.7 388.0,1114.0 383.3,1111.0 150.4,949.8 138.3,365.2 135.9,74.2 363.9,70.2 417.9,69.2 419.9,69.1 706.6,64.0 888.5,60.8 992.3,59.0 1032.3,58.2 1096.0,57.1 1342.2,1013.9 1450.2,1433.1 1607.2,1877.5 1600.1,1874.4 1589.2,1869.6 1588.5,1971.1 558.1,2015.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[271.0,1860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89422083303215,42.035920461935014]}},{"type":"Feature","properties":{"resourceCoords":[649.0,1292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8927956644497,42.03526642756056]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0038","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"390.3,580.2 720.8,580.2 807.1,580.2 909.2,577.5 901.8,595.9 1242.1,462.9 1482.7,1809.8 1435.6,1808.8 803.9,1795.6 496.1,1811.6 164.7,1828.8 142.7,1829.9 143.9,1619.4 286.2,580.1 390.3,580.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[890.0,583.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89418206675619,42.03350731689528]}},{"type":"Feature","properties":{"resourceCoords":[820.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8943509285198,42.031318979500846]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p39","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0039","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"309.5,1868.5 280.8,1745.0 170.3,1716.2 118.0,1613.8 115.1,1126.3 263.6,469.3 264.6,431.8 221.5,422.1 236.9,353.8 273.6,275.3 299.5,277.4 352.8,108.3 478.0,38.5 733.0,62.2 1027.2,45.7 1172.7,120.1 1220.7,191.3 1340.2,263.6 1560.3,324.7 1557.9,394.8 1436.5,915.6 1471.0,949.5 1515.1,1475.5 1515.3,1993.4 1319.3,1995.5 862.5,1998.4 292.7,1957.6 309.5,1868.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[879.0,1764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.916967,42.050428]}},{"type":"Feature","properties":{"resourceCoords":[758.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9188165,42.054491]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p4","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0004","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.1,2048.0 181.0,2045.0 181.0,1728.0 187.6,1424.0 187.9,1132.9 208.1,1074.4 193.5,1068.9 176.8,744.1 200.9,734.5 150.5,679.8 535.6,338.1 1534.6,213.9 1588.7,185.9 1649.0,154.7 1649.0,2051.6 1373.6,1976.8 1368.2,1971.3 1279.5,1878.8 1233.8,1859.1 1178.0,1796.5 636.9,2054.1 263.1,2048.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[181.0,1728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.885541,42.0406969]}},{"type":"Feature","properties":{"resourceCoords":[181.0,2045.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.885939,42.0401955]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p40","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0040","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"548.9,2026.5 245.9,1998.2 311.2,1863.0 339.7,1633.0 338.9,1373.9 298.1,1162.3 336.4,530.8 284.6,87.4 657.1,69.0 700.7,52.2 835.8,45.0 1196.6,25.4 1197.5,279.9 1301.4,358.5 1266.5,400.4 1231.4,459.3 1216.0,498.6 1199.8,571.7 1197.0,995.0 1198.0,1348.2 1200.6,1409.9 1211.5,1467.6 1239.5,1539.5 1261.7,1577.8 1304.1,1630.7 1198.5,1741.5 1201.0,1964.6 1196.6,1993.8 708.6,2025.8 549.4,2031.1 548.9,2026.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[951.0,995.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9077706,42.0345035]}},{"type":"Feature","properties":{"resourceCoords":[1197.0,995.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9065464,42.0345008]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p41","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0041","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"529.8,85.2 1024.1,52.7 1491.5,27.2 1502.3,26.6 1531.3,1027.0 1559.2,1025.6 1550.3,1032.0 1555.9,1627.0 1516.3,1978.3 1479.5,2015.3 1317.0,2052.8 577.7,2062.6 318.9,2052.3 207.8,2008.3 181.8,1971.4 188.8,1819.9 114.3,1642.7 112.8,1173.3 138.4,1099.3 304.3,954.7 303.9,821.6 411.1,821.3 451.6,791.6 451.2,665.9 509.9,514.2 512.6,211.2 497.7,174.2 375.7,159.8 368.5,90.6 529.8,85.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[783.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9077635,42.0271022]}},{"type":"Feature","properties":{"resourceCoords":[1025.0,2053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9065898,42.0235078]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0042","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1172.8,2057.9 160.1,2039.5 159.9,2011.5 158.2,1654.1 156.6,1548.1 154.5,1263.4 153.8,1156.1 158.0,1156.3 160.6,137.8 478.9,68.2 478.7,31.8 485.9,32.1 492.7,32.4 571.7,36.0 1162.1,180.7 1162.2,203.3 1162.5,241.7 1163.6,402.0 1161.2,402.0 1147.6,708.5 1289.6,714.7 1310.7,745.6 1271.2,792.5 1282.6,957.8 1252.2,1053.8 1276.2,1358.2 1193.2,1455.6 1174.0,1552.1 1161.2,2012.0 1172.6,2029.7 1172.8,2057.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[175.0,1664.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.90238859434471,42.03090444766543]}},{"type":"Feature","properties":{"resourceCoords":[501.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89450404402274,42.02998617682589]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0043__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p43 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0043__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0043","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"444.4,60.9 443.6,79.3 127.6,91.2 159.1,565.6 134.8,931.5 221.6,1333.9 204.8,1740.4 231.8,1999.0 354.0,2046.5 501.9,2053.2 1481.2,2001.0 1439.8,1823.8 1357.8,1657.8 1297.4,1373.6 1300.4,1225.8 1374.0,1155.2 1358.5,989.0 1435.9,925.9 1103.3,945.8 958.5,798.6 883.5,540.3 922.6,178.0 878.0,133.9 637.4,49.9 444.4,60.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0043__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[246.0,577.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.87597638939572,42.015381662187984]}},{"type":"Feature","properties":{"resourceCoords":[1006.0,1556.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8722626845453,42.01179558520876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0044__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p44 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.85"},{"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":"6600.0"},{"label":"split_canvas_h","value":"2273.6"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0044__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0044","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1349.0,237.2 688.5,234.8 342.0,237.2 1.0,239.5 1.0,253.6 829.9,562.7 831.1,562.7 841.1,523.1 1335.7,545.4 1336.3,532.3 1649.0,401.9 1649.0,58.6 1556.8,1.0 1358.7,1.0 1358.0,16.5 1349.0,237.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0044__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[342.0,237.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8869236,42.0241681]}},{"type":"Feature","properties":{"resourceCoords":[1349.0,237.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8844801,42.0242489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p5 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"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":"6600.0"},{"label":"split_canvas_h","value":"8400.0"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"621.6,1627.2 1069.6,1319.8 1325.4,1147.1 438.9,835.8 498.6,790.8 546.5,752.6 1084.7,62.0 875.2,59.5 238.8,52.1 156.3,49.5 153.0,859.2 175.4,859.1 177.9,897.5 240.8,1889.7 390.9,1786.2 621.6,1627.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[642.0,1601.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88686560566754,42.03730623863767]}},{"type":"Feature","properties":{"resourceCoords":[174.0,1897.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88822720762802,42.03727920037363]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p5 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.29"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3081.6"},{"label":"split_canvas_y","value":"4065.6"},{"label":"split_canvas_w","value":"3518.4"},{"label":"split_canvas_h","value":"4334.4"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"864.8,1648.8 840.7,1650.5 803.4,1652.2 1081.4,2028.0 1103.0,2028.1 1111.4,2028.2 1285.3,2029.2 1487.0,2030.0 1482.4,2002.5 1638.2,1867.4 1632.0,1810.8 1623.2,1801.8 1599.1,1774.2 1581.5,1738.7 1565.9,1716.2 1565.8,1720.7 1423.3,1556.4 1422.7,1552.7 1411.8,1489.6 1398.3,1468.7 1392.7,1427.3 1095.3,1382.4 1201.9,1456.6 1287.7,1516.2 871.2,1648.3 864.8,1648.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[770.4,1016.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88668814259013,42.04102698558745]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,1016.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88236472175421,42.041228284182736]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,2100.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88203319227291,42.03724501807115]}},{"type":"Feature","properties":{"resourceCoords":[770.4,2100.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.88635661310883,42.03704371947587]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0006","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"480.9,1335.4 319.1,1344.0 208.3,1332.8 181.3,1600.5 205.1,1863.4 132.2,1863.7 129.4,1872.2 254.4,1946.5 464.1,2071.2 510.9,2099.0 533.1,2087.8 561.7,2074.7 761.9,2063.0 1274.7,2035.8 1275.3,1796.7 1271.9,1546.0 1271.8,1295.0 1269.0,1049.7 1268.5,642.5 1299.0,590.7 1235.8,544.3 1170.6,506.7 1160.7,504.4 1135.2,486.3 1121.5,476.6 1082.5,450.3 1077.2,433.2 333.7,1.0 283.2,1.0 283.6,89.8 238.7,120.1 206.0,368.2 157.5,439.8 157.8,522.4 206.9,567.3 211.4,751.4 125.7,890.7 186.4,1048.2 210.2,1314.9 208.5,1331.3 318.7,1342.5 478.9,881.9 483.7,856.6 489.9,849.9 492.0,847.7 505.9,841.0 509.2,840.6 520.3,839.3 542.3,839.1 598.4,838.7 610.1,838.6 673.0,697.8 742.8,837.6 754.5,837.5 755.2,1140.3 480.8,1325.3 480.9,1335.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[765.0,1568.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8917797768683,42.045857309051655]}},{"type":"Feature","properties":{"resourceCoords":[265.0,1814.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89420265757073,42.04498187783134]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0007","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.0,113.8 820.3,80.8 807.1,25.1 1306.5,33.1 1306.5,29.1 1500.9,39.5 1545.4,66.2 1581.3,60.3 1585.1,97.8 1567.3,292.4 1540.9,558.2 1524.2,558.0 1005.2,672.9 949.6,621.5 903.0,584.9 944.1,796.0 965.0,840.4 969.5,889.7 967.3,915.0 1043.1,1303.8 1062.0,1299.8 1104.3,1303.5 1121.8,1299.5 1488.9,1416.0 1443.5,1971.1 1493.1,1999.4 1236.0,2046.8 1243.5,2083.9 1235.0,2083.9 993.4,1963.5 1005.9,1926.4 866.4,1735.3 874.8,1705.1 843.2,1701.2 548.0,1831.7 544.3,1861.7 202.1,1926.3 202.1,1924.6 206.8,1624.9 206.8,1541.5 211.1,1304.0 211.4,1055.0 215.1,805.6 216.0,561.9 221.6,157.4 252.7,106.4 263.0,113.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[452.0,806.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88817027758374,42.04683746911081]}},{"type":"Feature","properties":{"resourceCoords":[452.0,1373.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88814063016564,42.0447881993788]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0008","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"392.5,2013.3 362.7,2004.6 351.0,1456.4 337.6,1455.0 362.5,659.5 365.4,660.1 399.7,68.7 522.9,96.9 620.3,203.5 705.8,226.5 689.5,287.1 710.6,308.1 767.8,323.5 878.3,438.1 1044.6,610.7 1084.8,652.4 1123.3,692.4 1154.6,724.8 1169.0,739.8 1193.8,765.6 1213.6,786.1 1306.1,1208.4 1293.2,1194.8 1266.3,1186.3 1206.2,1188.3 1182.5,1189.2 1150.2,1186.6 1143.8,1259.1 1124.1,1326.3 1094.6,1393.2 1134.2,1420.5 813.3,1739.1 603.0,1938.1 453.1,2076.7 392.5,2013.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[295.0,372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.8971131336609,42.04418464862564]}},{"type":"Feature","properties":{"resourceCoords":[295.0,1468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89570962679247,42.04031686234642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Plaines, Illinois | 1956 | sanborn01824_001 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:07:23Z","modified":"2026-10-18T21:07:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0009","type":"ImageService3","width":1650,"height":2100},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1030.8,1193.5 999.3,1208.8 679.7,1223.5 361.6,1221.8 360.9,1019.4 356.3,732.5 338.4,284.7 657.8,273.2 852.2,267.7 911.5,273.0 1005.8,253.4 1099.7,251.1 1135.8,253.4 1182.8,266.5 1256.3,301.4 1255.5,274.1 1331.9,296.4 1470.8,299.8 1499.8,303.9 1511.0,303.5 1557.8,812.9 1549.9,818.7 1270.4,1020.8 1275.5,1046.9 1394.7,1222.2 1276.5,1304.3 1041.2,1472.4 1030.8,1193.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018241956:01824_1956-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[674.0,735.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.89157431880483,42.03921745092768]}},{"type":"Feature","properties":{"resourceCoords":[1515.0,865.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.88839488486168,42.03715074102841]}}]}}]}