{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01846_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Elgin, Illinois | 1903 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"64"},{"label":"placed","value":"40"},{"label":"unplaced","value":"24"},{"label":"fit sources","value":"georef 23, georef-snap 15, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 39 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 42.04156,-88.27842 +/-289m); p14 (tier 1, 42.03412,-88.28003 +/-259m); p21__1 (tier 1, 42.03472,-88.29627 +/-100m); p21__2 (tier 1, 42.04275,-88.29177 +/-224m); p24__1 (tier 1, 42.05589,-88.28442 +/-100m); p24__3 (tier 2, 42.04868,-88.27931 +/-398m); p24__5 (tier 2, 42.04868,-88.27931 +/-398m); p24__6 (tier 2, 42.04868,-88.27931 +/-398m); p30__1 (tier 2, 42.03285,-88.28849 +/-100m); p30__2 (tier 1, 42.03180,-88.28826 +/-100m); p30__6 (tier 2, 42.03285,-88.28849 +/-100m); p31__1 (tier 1, 42.02686,-88.26980 +/-113m); p31__2 (tier 1, 42.02660,-88.27102 +/-100m); p31__4 (tier 1, 42.02765,-88.27270 +/-100m); p31__5 (tier 1, 42.02620,-88.27200 +/-128m); p32__1 (tier 4, 42.03981,-88.28057 +/-2473m); p32__2 (tier 4, 42.03981,-88.28057 +/-2473m); p32__3 (tier 4, 42.03981,-88.28057 +/-2473m); p32__4 (tier 4, 42.03981,-88.28057 +/-2473m); p33__2 (tier 1, 42.05092,-88.28576 +/-179m); p34__2 (tier 1, 42.04014,-88.26822 +/-104m); p34__3 (tier 1, 42.03434,-88.29890 +/-100m); p3__1 (tier 2, 42.03877,-88.28395 +/-208m); p3__2 (tier 2, 42.03877,-88.28395 +/-208m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,634.1 -0.0,170.2 807.4,165.5 888.1,0.0 1613.0,0.0 1613.0,1743.8 -0.0,1805.5 88.0,1629.3 83.1,633.9 -0.0,634.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1225.0,625.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2771675,42.0428695]}},{"type":"Feature","properties":{"resourceCoords":[1284.0,1745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2770407,42.0407874]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1543.6,1880.1 207.9,1873.7 205.2,1121.8 66.8,1120.6 62.6,364.4 202.3,364.8 201.2,47.5 -0.0,48.2 -0.0,9.8 1613.0,0.0 1613.0,134.5 1527.2,135.3 1529.3,368.9 1587.5,369.1 1587.6,1124.0 1536.5,1124.1 1543.6,1880.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27902433121012,42.04081223396703]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27490452812629,42.040808993542434]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2749096664498,42.03715457623774]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27902946953364,42.03715781666234]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p12","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.2,198.8 578.1,196.9 577.9,-0.0 1060.2,-0.0 1060.3,195.1 1543.1,193.2 1542.0,-0.0 1613.0,2.0 1613.0,1760.6 738.0,1748.4 528.1,1893.5 87.3,1895.6 91.2,198.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[577.0,740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2781574,42.0363203]}},{"type":"Feature","properties":{"resourceCoords":[1060.0,1322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2796277,42.0354193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p13 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2466.4"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5185.6"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"80.0,1913.0 1502.3,1913.0 1482.7,618.2 638.1,617.3 636.7,699.1 100.2,701.5 80.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1500.0,701.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2736679,42.0345159]}},{"type":"Feature","properties":{"resourceCoords":[90.0,701.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2736718,42.0372102]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p13 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"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":"2473.6"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,78.6 46.3,69.4 58.4,616.7 1613.0,618.4 1613.0,78.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1046.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.271111,42.0371411]}},{"type":"Feature","properties":{"resourceCoords":[58.0,556.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2736639,42.0362836]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.7,1847.3 46.8,1600.7 -0.0,1812.3 -0.0,-0.0 1613.0,0.0 1613.0,1023.1 1514.8,1050.4 1516.7,1847.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28098753610035,42.03230199579871]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27772754245544,42.034081233785656]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27490653670655,42.03118916891789]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27816653035147,42.029409930930946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 535.3,1913.0 -0.0,1185.3 -0.0,1132.1 8.0,1123.5 37.0,1074.7 -0.0,1024.3 -0.0,35.8 1613.0,0.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27630390782791,42.034576826089705]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27220632591322,42.03456675715529]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27222229061371,42.03093169713337]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2763198725284,42.030941766067784]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p17","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1460.0,56.2 1483.5,210.8 1613.0,267.6 1613.0,1913.0 -0.0,1913.0 -0.0,138.9 1460.0,56.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1554.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2740721,42.0297602]}},{"type":"Feature","properties":{"resourceCoords":[1554.0,1355.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2736196,42.0289876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 15.6,1913.0 46.1,-0.0 1613.0,-0.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28629597190161,42.036959409681785]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28424683362066,42.03433398347518]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28840967979139,42.032516200945516]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29045881807234,42.03514162715212]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"97.3,1913.0 90.5,234.9 -0.0,235.7 -0.0,-0.0 1613.0,-0.0 1613.0,57.7 1559.8,58.4 1550.2,1913.0 97.3,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28802317694826,42.039457302977866]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28604261729362,42.03684776251271]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29018044046987,42.03509088598298]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29216100012451,42.03770042644814]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1613.0,1362.3 692.2,1913.0 -0.0,1913.0 -0.0,1815.6 121.8,1795.5 94.2,1238.3 -0.0,1239.0 -0.0,723.6 88.6,723.9 85.0,152.3 511.4,144.2 707.9,-0.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28066891509386,42.03740243944404]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28073937881793,42.034282850745164]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28568585048448,42.03434535773862]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28561538676041,42.037464946437495]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,0.0 1613.0,-0.0 1605.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29047229964716,42.04174654992954]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28842021209097,42.039095037130984]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29262473993143,42.037274776453216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29467682748762,42.039926289251774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p21 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2504.8"},{"label":"split_canvas_w","value":"2573.6"},{"label":"split_canvas_h","value":"1180.0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"630.8,888.0 636.0,887.3 643.4,626.2 0.0,627.3 0.0,912.9 635.0,921.2 635.5,901.8 630.8,888.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[268.2,621.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2982487,42.0377198]}},{"type":"Feature","properties":{"resourceCoords":[171.1,662.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2988534,42.0376864]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p21 [4]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3651.6"},{"label":"split_canvas_w","value":"2540.0"},{"label":"split_canvas_h","value":"4000.4"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 608.3,1913.0 635.0,921.2 51.6,913.6 28.3,981.4 -0.0,976.7 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0021__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,912.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29676626552562,42.0362712120954]}},{"type":"Feature","properties":{"resourceCoords":[635.0,912.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29514866406153,42.03627734036603]}},{"type":"Feature","properties":{"resourceCoords":[635.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2951356766645,42.03438059926922]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29675327812859,42.03437447099859]}},{"type":"Feature","properties":{"resourceCoords":[119.0,1754.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2964522,42.0346769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1542.8,317.4 1542.4,1913.0 -0.0,1913.0 -0.0,-0.0 1613.0,0.0 1613.0,317.4 1542.8,317.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29074301274757,42.04727003932732]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28666436212461,42.04726675457525]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28666957136247,42.043649274742464]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29074822198542,42.04365255949454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p23","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1876.3 0.0,0.0 1613.0,3.9 1613.0,1865.8 -0.0,1876.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1285.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2824883,42.0481609]}},{"type":"Feature","properties":{"resourceCoords":[129.0,26.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2853876,42.0499109]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p24 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"1501.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4950.4"},{"label":"split_canvas_h","value":"3812.4"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1536.9,-0.0 440.8,-0.0 466.6,950.2 1554.5,953.0 1536.9,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[839.2,765.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2810528,42.0512817]}},{"type":"Feature","properties":{"resourceCoords":[1541.0,214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2796668,42.0499218]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p24 [4]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3800.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3852.0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 1613.0,953.1 1463.6,952.7 376.6,972.5 376.7,1025.7 71.7,1025.8 78.3,1443.5 276.0,1433.8 276.0,1427.1 368.0,1423.9 527.8,1418.4 527.7,1421.4 802.3,1407.9 806.6,1913.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0024__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1199.0,1404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2767479,42.0455698]}},{"type":"Feature","properties":{"resourceCoords":[628.0,973.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2781967,42.04641]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1613.0,1913.0 -0.0,1913.0 -0.0,0.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27730607313673,42.05503912634928]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27726762623834,42.052030489224144]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28203949855053,42.051996393217955]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28207794544892,42.05500503034309]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p26 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2181.6"},{"label":"split_canvas_h","value":"5109.2"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"545.4,0.0 -0.0,-0.0 0.0,1080.1 545.4,1277.3 545.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[519.4,1198.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2681424,42.0568579]}},{"type":"Feature","properties":{"resourceCoords":[519.4,152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2654911,42.056845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p26 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"2181.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4270.4"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1187.0,1913.0 1613.0,1913.0 1613.0,0.0 545.4,-0.0 545.4,1277.3 626.1,1309.5 626.1,1913.0 1187.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1012.2,1306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2706325,42.0512979]}},{"type":"Feature","properties":{"resourceCoords":[574.4,171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2717861,42.0533879]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p26 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4320.4"},{"label":"split_canvas_w","value":"2504.4"},{"label":"split_canvas_h","value":"3331.6"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"626.1,1309.5 545.4,1277.3 0.0,1080.1 -0.0,1913.0 626.1,1913.0 626.1,1309.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0026__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[259.1,1297.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2676621,42.0540955]}},{"type":"Feature","properties":{"resourceCoords":[259.1,1786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2677116,42.0531897]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p27","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0027","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1015.2 52.1,1015.6 59.3,240.6 -0.0,239.9 -0.0,-0.0 1489.3,0.0 1473.6,1841.3 -0.0,1791.4 -0.0,1015.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1048.0,1032.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2724771,42.0386468]}},{"type":"Feature","properties":{"resourceCoords":[569.0,247.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2736935,42.0401]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p28","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0028","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 680.0,1913.0 681.0,1852.2 -0.0,1849.9 -0.0,-0.0 1613.0,0.0 1613.0,323.1 1476.8,324.0 1482.1,1441.8 1613.0,1440.9 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[313.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2705954,42.0386396]}},{"type":"Feature","properties":{"resourceCoords":[1484.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.26761,42.0371525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p29","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0029","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,0.0 1228.8,-0.0 1228.8,-0.0 1381.1,-0.0 1592.1,530.0 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[295.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.284845,42.029835]}},{"type":"Feature","properties":{"resourceCoords":[731.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2848078,42.0290341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p30 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2490.8"},{"label":"split_canvas_w","value":"4548.4"},{"label":"split_canvas_h","value":"3095.2"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1137.1,951.1 617.0,952.2 619.5,623.0 0.0,622.7 0.0,1038.5 0.0,1325.8 698.8,1328.1 871.6,1396.5 1137.1,1393.9 1137.1,951.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[154.0,675.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2957883,42.0436918]}},{"type":"Feature","properties":{"resourceCoords":[419.0,675.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2952021,42.0437922]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p30 [4]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2468.0"},{"label":"split_canvas_y","value":"2309.6"},{"label":"split_canvas_w","value":"2080.8"},{"label":"split_canvas_h","value":"1499.2"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"619.5,623.0 617.0,952.2 1137.1,951.1 1137.2,577.4 619.8,584.0 619.5,623.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[665.0,900.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.285269,42.026289]}},{"type":"Feature","properties":{"resourceCoords":[1112.2,900.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.284059,42.02632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p30 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5303.2"},{"label":"split_canvas_w","value":"3486.4"},{"label":"split_canvas_h","value":"2348.8"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"575.2,1327.7 0.0,1325.8 -0.0,1913.0 582.7,1913.0 575.2,1327.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0030__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1325.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29758899352997,42.04340559120185]}},{"type":"Feature","properties":{"resourceCoords":[871.6,1325.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29537965341545,42.043767136064865]}},{"type":"Feature","properties":{"resourceCoords":[871.6,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29505367261612,42.04265295843328]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29726301273064,42.04229141357026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0031__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p31 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"4137.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2314.4"},{"label":"split_canvas_h","value":"4785.2"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0031__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0031","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1046.5,0.0 1040.7,516.5 1034.4,1033.6 1034.4,1036.0 1613.0,1196.3 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0031__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1095.3,783.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.27141,42.0266644]}},{"type":"Feature","properties":{"resourceCoords":[1518.1,929.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2702268,42.0266666]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0033__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p33 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2574.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5078.0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0033__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0033","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 1613.0,643.5 0.0,645.4 0.0,1228.0 0.0,1363.4 0.0,1459.5 -0.0,1913.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0033__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,643.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29025141824472,42.0534600588958]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,643.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28614793128848,42.05361855889339]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28598015814458,42.05121531093794]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.29008364510082,42.05105681094035]}},{"type":"Feature","properties":{"resourceCoords":[1247.0,696.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.287072,42.0534823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p34 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2482.8"},{"label":"split_canvas_h","value":"3198.0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 0.0,794.4 618.8,799.5 620.7,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[315.9,560.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2685,42.0191956]}},{"type":"Feature","properties":{"resourceCoords":[315.9,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2685394,42.0200356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p34 [4]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3177.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4474.4"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.7,1913.0 1613.0,1913.0 1613.0,808.1 1226.2,805.0 618.8,799.5 66.6,795.0 64.7,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0034__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[70.0,1354.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.26761,42.0389774]}},{"type":"Feature","properties":{"resourceCoords":[70.0,850.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.267618,42.0399308]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p35","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0035","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,261.8 233.9,254.4 784.7,0.0 1613.0,0.0 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[648.0,1399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2811694,42.0254195]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,1399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.279008,42.025449]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0003__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p3 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"2021.6"},{"label":"split_canvas_y","value":"5193.2"},{"label":"split_canvas_w","value":"2371.2"},{"label":"split_canvas_h","value":"2458.8"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0003__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1096.2,1823.5 1098.2,1789.9 1086.5,1790.2 1086.5,1354.9 1086.5,1298.3 616.4,1304.0 505.6,1305.4 505.7,1305.8 513.9,1319.0 798.2,1774.2 976.6,1763.9 977.5,1775.4 976.5,1828.6 1096.2,1823.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0003__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[505.4,1298.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28535344811394,42.03825956671114]}},{"type":"Feature","properties":{"resourceCoords":[1098.2,1298.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28386231639645,42.03824892676806]}},{"type":"Feature","properties":{"resourceCoords":[1098.2,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28387707001423,42.03709228830708]}},{"type":"Feature","properties":{"resourceCoords":[505.4,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28536820173171,42.03710292825016]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1847.6 10.2,1831.6 11.1,1793.4 -0.0,1740.6 -0.0,152.8 598.7,157.2 597.9,232.7 804.9,233.7 929.1,0.0 1613.0,0.0 1613.0,321.0 1471.6,320.1 1473.1,1085.2 1613.0,1086.8 1613.0,1847.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28258268921044,42.040712983862164]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27851063820279,42.04072110352673]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27849776290935,42.03710904010289]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28256981391701,42.03710092043833]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,91.7 434.9,89.7 434.6,31.6 1583.5,34.6 1585.7,1867.3 1613.0,1867.2 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28794454605057,42.043823400982504]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28387468777106,42.04380564013209]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28390285238693,42.04019569653989]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28797271066644,42.0402134573903]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1514.9 1406.8,1913.0 1197.7,1913.0 1198.1,1836.8 593.3,1835.5 593.7,1913.0 37.5,1913.0 41.4,62.6 1532.0,63.8 1529.8,524.9 1613.0,525.1 1613.0,1514.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28405270346799,42.043857948773216]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28002163215115,42.04385025581074]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28003383143107,42.04027472022864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28406490274791,42.040282413191115]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1546.9,1785.3 -0.0,1786.4 -0.0,1357.7 121.6,1358.8 126.7,52.3 1551.5,52.5 1546.9,1785.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28235261332485,42.04665957069912]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28236127265752,42.04362754228955]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2871696105738,42.0436352226909]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28716095124112,42.04666725110047]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.2,29.0 -0.0,29.0 -0.0,-0.0 395.6,29.1 1613.0,0.0 1613.0,1881.5 108.5,1874.1 131.2,29.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28196312641448,42.04997582711962]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27787152988923,42.04997758954635]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.2778687348144,42.04634871762383]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28196033133966,42.046346955197095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elgin, Illinois | 1903 | sanborn01846_004 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T14:42:10Z","modified":"2026-09-22T14:42:10Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"529.6,-0.0 1338.8,-0.0 1338.8,85.2 1500.3,164.6 1504.9,958.1 1505.2,1849.1 98.8,1856.2 93.0,734.1 559.1,730.7 529.6,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g018461903:01846_1903-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27775670662184,42.04658368681025]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.27778692398921,42.043512227332634]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28265778756983,42.0435390286816]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.28262757020246,42.04661048815922]}}]}}]}