{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01831_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dundee, Illinois | 1922 | 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":"24"},{"label":"placed","value":"15"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef-snap 8, georef 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"7 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p12__1 (tier 2, 42.10679,-88.28627 +/-818m); p13__1 (tier 1, 42.10757,-88.29004 +/-226m); p14__1 (tier 1, 42.09908,-88.29119 +/-100m); p14__2 (tier 1, 42.09006,-88.27679 +/-112m); p14__3 (tier 1, 42.10486,-88.28404 +/-166m); p14__4 (tier 1, 42.10419,-88.28862 +/-108m); p6__2 (tier 1, 42.11263,-88.28952 +/-100m); p8__2 (tier 1, 42.09454,-88.27294 +/-100m); p9__2 (tier 2, 42.10073,-88.27528 +/-126m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.1,1847.5 1328.8,1839.4 1445.2,1843.7 1446.2,1892.9 1577.0,1862.3 1611.6,1230.6 1611.1,361.3 1553.2,14.7 1612.0,7.2 1612.0,1.0 210.2,1.0 28.4,5.8 24.9,1.2 1.0,24.4 1.0,654.0 88.0,840.4 51.5,839.8 9.3,1612.8 1.0,1661.3 1.0,1812.4 711.0,1884.4 711.1,1894.8 771.0,1906.5 770.8,1889.7 770.1,1847.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[778.0,426.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27458177758261,42.09920880210238]}},{"type":"Feature","properties":{"resourceCoords":[762.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27397667398677,42.09648974584853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p11","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.2,1874.4 17.6,1801.3 34.2,66.9 1385.4,16.6 1514.2,96.0 1563.6,67.0 1612.0,133.1 1612.0,155.4 1594.2,1734.0 1612.0,1760.5 1612.0,1762.0 1571.2,1762.2 1570.5,1858.0 764.1,1857.8 230.2,1859.6 230.2,1874.6 58.2,1874.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1161.0,965.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2870097,42.1132971]}},{"type":"Feature","properties":{"resourceCoords":[299.0,965.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2891215,42.1130542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p12 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.6,1032.3 166.1,1359.0 205.7,1467.0 313.0,1467.0 313.0,1681.2 390.9,1695.3 477.9,1912.0 502.1,1912.0 522.0,1788.4 1292.9,1882.2 1566.2,1858.8 1597.1,314.2 1566.6,84.8 1483.7,41.5 1439.2,54.1 1397.9,1.0 1351.8,1.0 1350.7,96.5 538.1,92.0 1.0,90.8 1.0,105.9 21.1,106.0 39.1,273.6 22.5,750.0 11.8,751.5 50.6,848.0 48.8,977.3 54.6,1032.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[916.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.286291,42.109668]}},{"type":"Feature","properties":{"resourceCoords":[1338.0,1074.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2853166,42.1100244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p13 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.04"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3398.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3053.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1595.5,1579.5 1569.8,1569.4 1568.0,1302.8 1491.2,1255.2 1580.7,1027.7 1466.8,982.8 1469.9,851.5 1488.1,457.9 1504.9,397.0 1560.9,260.5 1560.1,141.7 1401.1,102.3 1202.5,23.9 1026.6,106.0 912.0,1459.7 966.2,1815.4 1193.5,1861.7 1487.9,1761.5 1595.5,1579.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1493.1,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28794500937339,42.10911014087676]}},{"type":"Feature","properties":{"resourceCoords":[1842.8,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28729586935994,42.10939509537621]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0014__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p14 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3426.0"},{"label":"split_canvas_y","value":"4950.8"},{"label":"split_canvas_w","value":"3026.0"},{"label":"split_canvas_h","value":"2701.2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0014__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1010.3,1354.3 971.6,1252.6 947.7,1875.3 1013.8,1881.3 1012.1,1800.8 1063.2,1792.5 1577.3,1862.5 1517.2,1424.5 1282.9,1429.2 1235.5,1261.8 1185.8,1336.1 1010.3,1354.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0014__5/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[971.4,1411.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27725882978774,42.09082535010967]}},{"type":"Feature","properties":{"resourceCoords":[971.4,1858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27728146701993,42.0900025087564]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p2 [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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"280.8,1796.4 277.9,1863.1 1583.5,1845.3 1581.8,1300.0 1581.9,719.8 1584.2,85.0 1199.5,16.4 687.4,35.4 685.5,1.0 634.4,1.0 632.8,137.5 379.7,115.7 380.1,66.7 43.1,141.5 90.5,800.1 46.1,887.6 271.6,935.4 290.4,935.5 290.4,939.4 294.5,940.2 290.4,1199.9 290.4,1658.0 283.1,1664.3 70.8,1692.4 30.8,1797.2 280.8,1796.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1054.0,762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28523702770808,42.10010186575308]}},{"type":"Feature","properties":{"resourceCoords":[1054.0,1841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28522164848097,42.09811201799246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p2 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.74"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3734.0"},{"label":"split_canvas_w","value":"1161.6"},{"label":"split_canvas_h","value":"2898.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.4,1174.2 275.9,959.5 93.5,952.6 80.1,1453.5 1.0,1471.7 1.0,1520.7 252.6,1540.2 253.0,1403.8 289.4,1403.5 289.4,1174.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,933.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2869189023461,42.10237772048718]}},{"type":"Feature","properties":{"resourceCoords":[290.4,933.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28619484386336,42.10237647277027]}},{"type":"Feature","properties":{"resourceCoords":[290.4,1658.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28619903738547,42.10103002103836]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1658.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28692309586822,42.10103126875528]}},{"type":"Feature","properties":{"resourceCoords":[252.3,1621.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2862937,42.1010989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.9,1348.7 30.9,781.4 35.3,160.6 73.5,167.6 81.8,38.9 182.2,11.2 1461.5,100.2 1468.6,104.5 1491.4,239.5 1612.0,410.3 1612.0,1289.9 1597.6,1305.0 1593.9,1893.5 1072.8,1888.7 508.3,1886.7 28.8,1882.1 28.9,1348.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1064.0,1873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2812747736787,42.098144540764565]}},{"type":"Feature","properties":{"resourceCoords":[55.0,1873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28383904425556,42.09812722675808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p4","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.4,10.5 262.8,10.0 259.9,76.6 1562.3,57.9 1559.0,570.7 1560.3,1109.7 1558.9,1684.7 1567.7,1684.7 1586.3,1782.2 1546.8,1781.8 1539.2,1832.8 1342.1,1853.7 627.2,1813.6 328.1,1819.3 320.5,1870.4 102.0,1796.3 24.0,1358.2 83.4,1146.9 34.6,701.6 107.8,650.9 110.2,169.3 8.8,22.9 13.4,10.9 125.4,10.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[306.0,1145.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.287022,42.096088]}},{"type":"Feature","properties":{"resourceCoords":[1033.0,1685.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2852037,42.0950964]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"493.9,99.0 1063.0,94.5 1588.3,93.3 1592.9,636.4 1595.0,1169.3 1597.5,1698.5 1596.8,1902.0 1594.0,1902.0 1593.9,1903.3 1575.3,1912.0 1572.5,1828.8 1543.8,1886.6 1190.4,1887.4 1046.0,1808.4 46.8,1803.7 27.6,1707.5 18.9,1707.5 16.1,1139.2 11.0,606.6 10.6,99.8 493.9,99.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[544.0,1182.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28256657935893,42.09608280311754]}},{"type":"Feature","properties":{"resourceCoords":[1059.0,1182.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.28126816401814,42.0960806414617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p6 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0006__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"574.5,1834.0 1114.6,1831.9 1114.5,1808.5 1540.2,1873.2 1588.7,1867.5 1604.1,1749.2 1612.0,1748.7 1612.0,1526.0 1517.9,710.7 1556.5,704.7 1429.5,521.5 1411.0,413.0 1154.3,413.0 1087.0,413.0 942.0,413.0 942.0,1.0 50.0,1.0 50.4,105.0 34.5,121.8 32.9,730.0 33.3,1286.8 31.1,1833.3 574.5,1834.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1114.0,1292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2772616,42.0971006]}},{"type":"Feature","properties":{"resourceCoords":[576.0,736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.278592,42.0981096]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.8,807.4 52.8,604.2 56.3,75.9 585.4,78.4 1111.4,78.2 1111.4,55.4 1525.7,120.0 1515.2,121.2 1571.4,1864.1 52.0,1879.1 28.3,817.1 49.8,807.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[572.0,1580.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2785803,42.0932927]}},{"type":"Feature","properties":{"resourceCoords":[1109.0,605.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2772467,42.0951286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p8 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.92"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1887.9 1612.0,1666.2 1612.0,1181.9 1605.8,866.2 1612.0,804.9 1583.9,126.4 1229.3,98.5 1129.7,20.0 84.8,15.5 33.7,89.8 15.7,700.3 1.0,700.6 1.0,845.5 95.1,1041.6 75.0,1160.2 299.1,1158.3 480.4,1156.7 478.1,890.6 478.1,890.6 681.4,889.1 746.0,888.6 748.3,1154.1 754.5,1906.0 762.7,1912.0 1249.0,1912.0 1270.3,1891.4 1274.2,1896.3 1612.0,1887.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2795871,42.1012918]}},{"type":"Feature","properties":{"resourceCoords":[-290.0,440.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2810948,42.1018582]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p8 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4616.4"},{"label":"split_canvas_w","value":"3018.4"},{"label":"split_canvas_h","value":"3035.6"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1218.5 1.0,1910.9 301.7,1912.0 309.0,1912.0 327.8,1851.0 461.6,1826.2 546.6,1907.0 753.6,1910.5 753.6,1902.0 725.2,1230.6 748.5,1225.4 748.1,1175.2 629.3,1169.2 59.0,1170.3 59.1,1230.6 1.0,1218.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0008__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[94.0,1178.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27385793181493,42.09646824954559]}},{"type":"Feature","properties":{"resourceCoords":[639.6,1178.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27247460397824,42.09666317037541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dundee, Illinois | 1922 | sanborn01831_005 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T06:21:46Z","modified":"2026-10-19T06:21:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"491.2,1869.2 993.1,1885.7 1332.2,1896.9 1332.0,1904.4 1488.9,1889.8 1586.7,1777.2 1609.9,1456.7 1537.1,960.5 1585.3,697.0 1520.8,616.9 1525.9,137.1 1438.0,133.3 1367.1,258.9 1191.2,251.4 1132.0,289.9 1132.0,296.7 1121.5,296.8 1071.1,329.6 840.0,303.1 839.2,300.1 835.0,300.1 835.0,283.8 770.5,36.9 650.1,11.5 543.5,26.0 473.0,114.7 52.5,144.3 26.9,141.4 34.1,859.9 25.6,859.5 21.9,1165.8 1.0,1832.1 1.0,1853.0 491.2,1869.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018311922:01831_1922-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[540.0,1386.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27482618116365,42.10093925169462]}},{"type":"Feature","properties":{"resourceCoords":[30.0,432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27657456713136,42.102482803388234]}}]}}]}