{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01850_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Elmhurst, Illinois | 1924 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"25"},{"label":"placed","value":"13"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef-snap 7, georef 5, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 15 panels"},{"label":"unplaced pages","value":"p11 (tier 1, 41.89794,-87.93657 +/-489m); p13__1 (tier 1, 41.89459,-87.94473 +/-100m); p13__2 (tier 1, 41.90355,-87.94248 +/-146m); p13__3 (tier 1, 41.89714,-87.94527 +/-119m); p13__4 (tier 1, 41.89754,-87.92699 +/-100m); p13__5 (tier 1, 41.89500,-87.94553 +/-110m); p13__6 (tier 1, 41.89425,-87.94535 +/-100m); p13__8 (tier 1, 41.89713,-87.92687 +/-133m); p14__1 (tier 1, 41.90028,-87.95318 +/-178m); p14__3 (tier 1, 41.88925,-87.94514 +/-100m); p14__4 (tier 1, 41.89414,-87.95203 +/-100m); p14__5 (tier 1, 41.89401,-87.95147 +/-111m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p10","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.38"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"837.8,1854.8 456.0,1850.4 338.4,1847.5 54.8,1845.8 65.5,1822.1 53.8,1486.3 30.9,1485.0 29.4,243.4 98.5,84.1 312.8,93.7 541.4,36.6 999.4,29.7 1387.5,56.5 1520.8,99.9 1577.1,221.4 1573.5,1813.5 1526.0,1873.0 1466.9,1880.8 1182.1,1831.0 864.6,1859.2 865.4,1912.0 839.6,1912.0 837.8,1854.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,893.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9293719,41.9012717]}},{"type":"Feature","properties":{"resourceCoords":[46.0,223.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.926058,41.9040553]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p12 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.43"},{"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":"4212.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.9,255.4 29.6,288.3 32.9,328.6 25.3,346.9 19.4,1322.6 39.8,1858.4 72.6,1880.7 175.6,1856.0 204.7,1882.0 221.2,1874.2 234.0,1886.0 344.0,1890.7 425.2,1843.8 729.3,1883.5 1012.0,1868.0 1016.4,1794.6 1045.9,1772.9 1007.7,1556.1 1052.0,1164.0 1044.0,111.2 1019.0,33.9 964.1,29.7 351.3,31.0 240.9,62.9 65.0,46.5 65.2,1.0 62.5,1.0 60.7,129.0 60.3,191.8 41.5,191.6 40.9,255.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[386.0,1359.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.938409,41.886621]}},{"type":"Feature","properties":{"resourceCoords":[386.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.938388,41.885036]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p12 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.28"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4212.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2240.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1091.3,86.6 1091.0,1773.8 1194.5,1773.7 1361.1,1858.3 1542.2,1876.5 1542.3,1912.0 1550.3,1912.0 1561.2,1912.0 1560.9,1848.7 1561.2,1718.7 1563.9,1718.7 1553.5,103.1 1091.3,86.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1072.0,1368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94246770303081,41.892890171543996]}},{"type":"Feature","properties":{"resourceCoords":[1555.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94008713729872,41.897648662447736]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0013__7/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p13 [7]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.09"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3925.2"},{"label":"split_canvas_w","value":"2160.4"},{"label":"split_canvas_h","value":"1226.8"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0013__7/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"197.6,1270.4 183.9,1230.8 411.1,1232.3 518.7,1269.6 525.4,1206.1 471.5,1189.9 515.3,1039.3 407.8,997.1 116.2,1003.6 109.8,1057.3 20.8,1059.7 23.0,1157.8 66.8,1178.6 25.6,1241.1 123.5,1273.2 197.6,1270.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0013__7/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,981.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.94625078658459,41.89510373609075]}},{"type":"Feature","properties":{"resourceCoords":[540.1,981.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.94426888403295,41.895145477838575]}},{"type":"Feature","properties":{"resourceCoords":[540.1,1288.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.94423722653289,41.894300849707875]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1288.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.94621912908453,41.894259107960046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0014__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p14 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.32"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3305.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3146.4"},{"label":"split_canvas_h","value":"1546.8"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0014__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"877.8,285.4 978.1,375.9 1280.2,317.7 1542.8,368.4 1548.8,134.0 1477.0,73.5 972.4,24.0 877.8,285.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0014__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[952.3,349.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9509176,41.8942231]}},{"type":"Feature","properties":{"resourceCoords":[1534.0,349.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9494796,41.8942504]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.16"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.3,744.1 87.1,745.0 85.3,464.2 79.6,463.9 103.2,79.2 923.2,96.0 922.0,131.4 1596.8,129.2 1587.3,381.8 1569.1,897.2 1548.4,1763.8 1546.5,1844.2 1511.8,1907.3 594.0,1854.9 594.0,1850.7 88.0,1796.8 71.3,1811.2 78.3,744.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1095.0,1355.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9411486819433,41.89850142126329]}},{"type":"Feature","properties":{"resourceCoords":[581.0,1820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94239399814589,41.897629687937595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.26"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.0,981.2 96.4,461.6 109.5,90.2 111.1,45.1 402.1,41.8 1169.9,25.8 1584.5,22.5 1583.5,53.9 1566.0,86.2 1582.0,105.8 1591.1,1291.1 1530.6,1364.2 1535.5,1505.0 1431.7,1510.6 1471.2,1800.2 1425.6,1866.0 210.7,1867.2 99.3,1880.1 58.7,1912.0 60.0,1854.7 79.0,981.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[79.0,967.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94000218632546,41.89938443220593]}},{"type":"Feature","properties":{"resourceCoords":[1565.0,1244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93635472035245,41.898926891047196]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.32"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1590.2,1711.5 1590.3,1827.1 918.5,1855.2 918.5,1819.9 67.0,1835.3 50.8,1103.0 67.6,1102.8 40.5,71.4 325.9,69.8 848.3,68.8 968.1,106.1 1022.5,108.5 1584.1,98.0 1586.3,903.6 1590.1,1666.9 1590.2,1711.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[330.0,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94305404929995,41.902165914990086]}},{"type":"Feature","properties":{"resourceCoords":[1567.0,66.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93994383832775,41.90401382694839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.35"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"755.3,165.3 1366.8,156.5 1339.0,961.0 1577.2,958.5 1551.5,1718.7 1140.0,1720.5 377.7,1733.7 88.8,1736.0 115.7,970.1 145.8,161.7 755.3,165.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93840250067436,41.90250518868775]}},{"type":"Feature","properties":{"resourceCoords":[1558.0,1726.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93634252961269,41.90113874624745]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p6","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.40"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"367.6,1815.2 369.0,1784.0 402.1,1025.4 164.2,1025.5 200.0,222.7 1284.1,225.9 1364.2,228.6 1339.7,791.7 1325.0,1025.0 1287.6,1782.8 1174.0,1782.2 1170.0,1833.3 367.6,1815.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[369.0,1784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9363589,41.901152]}},{"type":"Feature","properties":{"resourceCoords":[1325.0,1025.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.934057,41.9026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p7","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"785.1,83.5 1089.0,83.0 1394.6,83.9 1542.8,83.7 1546.6,83.7 1558.2,605.8 1549.7,605.8 1556.4,976.4 1573.8,976.2 1568.6,1170.4 1571.5,1170.5 1577.3,1312.0 1572.8,1311.7 1587.9,1849.5 1559.5,1875.9 1329.9,1886.8 499.1,1840.2 184.8,1878.3 28.6,1843.7 64.5,1524.4 22.1,1421.3 47.4,1135.5 32.0,120.4 42.5,83.2 193.8,40.1 785.5,31.1 785.1,83.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9474904,41.9021991]}},{"type":"Feature","properties":{"resourceCoords":[1089.0,83.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.9459597,41.904086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.46"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1544.2,86.3 1543.8,201.4 1546.5,1307.8 1545.8,1593.2 1550.5,1867.1 1266.8,1871.6 1239.4,1870.3 1178.9,1851.3 915.1,1851.1 767.2,1851.5 619.3,1851.9 314.3,1851.3 11.0,1852.2 11.4,1799.9 19.8,1799.8 11.6,1300.6 58.2,989.1 13.3,731.0 79.6,489.4 40.4,353.2 69.3,315.8 36.9,146.2 46.8,68.3 98.0,37.9 1247.8,15.2 1538.4,48.8 1544.2,86.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[915.0,694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94292254432266,41.90827090560205]}},{"type":"Feature","properties":{"resourceCoords":[915.0,1845.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.94301550098116,41.90407301225301]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elmhurst, Illinois | 1924 | sanborn01850_005 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.59"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T04:23:26Z","modified":"2026-10-19T04:23:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.9,109.5 46.0,66.7 40.1,29.2 197.6,47.0 488.5,19.4 1488.9,41.2 1537.5,73.5 1565.5,194.8 1593.7,511.6 1591.3,1762.6 1612.0,1762.3 1612.0,1785.2 1276.8,1800.8 1253.0,1790.4 1212.7,1791.0 668.5,1816.4 362.0,1833.0 56.4,1843.2 51.1,1570.0 51.1,1285.3 45.9,181.5 45.9,109.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018501924:01850_1924-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[670.0,1808.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93688574648696,41.904040897875]}},{"type":"Feature","properties":{"resourceCoords":[545.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.93735071751284,41.909945889119555]}}]}}]}