{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01790_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chicago, Illinois | 1896 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"137"},{"label":"placed","value":"130"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef 72, georef-snap 58"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"1 sheet(s) cut into 2 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 41.90919,-87.72278 +/-216m); p75 (tier 1, 41.88973,-87.70025 +/-260m); p76 (tier 2, 41.88860,-87.69750 +/-100m); p77 (tier 2, 41.88862,-87.69544 +/-100m); p78 (tier 1, 41.89206,-87.69284 +/-262m); p81__1 (tier 1, 41.88654,-87.72580 +/-149m); p81__2 (tier 2, 41.88805,-87.71260 +/-915m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p1","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0001","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1320.8,113.6 1241.9,113.5 1244.3,2126.0 315.9,2126.0 76.7,2028.2 24.4,2028.2 45.1,2126.0 -0.0,2126.0 -0.0,-0.0 1320.8,9.9 1320.8,113.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[756.0,2034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7251948,41.9062979]}},{"type":"Feature","properties":{"resourceCoords":[1244.0,2034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7239819,41.9063156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p10","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0010","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"218.0,2058.0 217.4,1.2 1419.0,0.0 1419.0,55.6 1202.6,56.0 1208.8,2059.1 218.0,2058.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[218.0,2058.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6944869,41.9066108]}},{"type":"Feature","properties":{"resourceCoords":[1202.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6921156,41.9102792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0100","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.8,241.4 957.5,310.1 952.6,1979.7 174.4,1975.0 167.8,241.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70418091408871,41.884659199937566]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70067720731956,41.88470836762717]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70057888715425,41.8807697936053]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7040825939234,41.8807206259157]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p101","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0101","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1216.2,1986.7 -0.0,1982.9 -0.0,313.8 1203.5,305.6 1216.2,1986.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0101/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70181306497796,41.884699437502]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69830817554832,41.88474102624896]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6982250112329,41.88080110810501]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70172990066254,41.88075951935805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p102","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0102","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1198.9,1953.8 204.6,1944.4 203.8,330.2 1203.0,338.1 1198.9,1953.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1199.0,961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6963409,41.8828936]}},{"type":"Feature","properties":{"resourceCoords":[1199.0,1454.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6963134,41.8819918]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p103","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0103","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.7,1999.2 245.8,271.9 1229.5,232.9 1245.6,191.7 1265.9,231.8 1418.0,226.1 1418.0,1997.8 263.7,1999.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0103/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6969822046223,41.88475570823176]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69349808082194,41.88478155705754]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69344639131894,41.88086498519042]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6969305151193,41.880839136364635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0104","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"550.6,222.2 1046.8,204.8 1067.1,1992.2 546.1,1991.6 550.6,222.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69485403700611,41.88476235359596]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69136532414632,41.884794823018076]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69130039507961,41.88087312016951]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6947891079394,41.880840650747395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p105","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0105","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1418.0,2038.2 117.2,2019.7 122.0,205.0 1418.0,171.4 1418.0,2038.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[122.0,1015.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6922204,41.8829371]}},{"type":"Feature","properties":{"resourceCoords":[122.0,205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6922722,41.8844085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p106","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0106","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1418.0,2034.2 250.2,2031.3 233.0,165.3 1339.1,125.7 1340.2,0.0 1418.0,0.0 1418.0,2034.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[456.0,1022.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6885298,41.8829809]}},{"type":"Feature","properties":{"resourceCoords":[456.0,158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6885656,41.8845512]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p107","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0107","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"168.2,0.0 167.7,52.1 241.3,52.6 241.4,96.7 982.3,84.9 982.3,2055.6 37.5,2049.7 37.5,2126.0 -0.0,2126.0 -0.0,-0.0 168.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1228.0,1088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7231529,41.8789072]}},{"type":"Feature","properties":{"resourceCoords":[1228.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7232129,41.8807638]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p108","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0108/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0108","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2032.0 -0.0,82.9 1264.9,85.1 1265.7,0.0 1418.0,0.0 1418.0,2038.9 -0.0,2032.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[243.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7231529,41.8789072]}},{"type":"Feature","properties":{"resourceCoords":[243.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7232129,41.8807638]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p109","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0109/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0109","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1418.0,0.0 1418.0,2056.3 85.8,2038.8 86.0,2126.0 -0.0,2126.0 -0.0,-0.0 1418.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0109/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71651012630618,41.88096670732702]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71301512201872,41.881047714052954]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7128531436104,41.87711868062276]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71634814789786,41.87703767389682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p11","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0011","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"219.0,2058.0 210.6,49.8 1206.7,0.0 1209.0,2058.0 219.0,2058.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[219.0,2058.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.692036,41.9066322]}},{"type":"Feature","properties":{"resourceCoords":[1209.0,2058.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6895932,41.9066535]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p110","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0110","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"430.3,0.0 1005.9,0.0 1005.8,73.1 1234.0,75.0 1234.0,2040.0 445.0,2037.5 430.3,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1234.0,2040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.710893,41.8772772]}},{"type":"Feature","properties":{"resourceCoords":[1234.0,75.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7110079,41.8809214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p111","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0111/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0111","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"244.0,64.8 1016.2,70.7 1008.2,2053.2 244.0,2043.0 244.0,64.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[244.0,785.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7109661,41.8795947]}},{"type":"Feature","properties":{"resourceCoords":[244.0,2043.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.710893,41.8772772]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p112","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0112","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1191.9,2048.3 -0.0,2042.7 -0.0,76.5 238.8,77.4 238.9,129.3 411.2,128.8 411.1,77.9 1193.0,80.0 1191.9,2048.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0112/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1193.0,1478.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7060524,41.8783827]}},{"type":"Feature","properties":{"resourceCoords":[1193.0,80.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7061202,41.8809807]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p113","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0113/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0113","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"73.5,2046.5 65.4,79.7 812.4,81.1 822.3,2045.5 73.5,2046.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0113/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70628529852725,41.88112708339038]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70276922560119,41.88116625995469]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70269088927519,41.87721354879019]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70620696220125,41.87717437222588]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p114","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0114/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0114","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1231.0,2049.0 -0.0,2045.2 -0.0,72.5 1231.3,80.2 1231.0,2049.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0114/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7029747,41.8810114]}},{"type":"Feature","properties":{"resourceCoords":[1231.0,2049.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7011099,41.8773847]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p115","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0115/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0115","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.2,2046.8 210.6,84.1 1210.3,92.2 1208.2,435.3 977.6,515.1 977.3,577.9 1203.5,580.0 1206.2,2056.8 208.2,2046.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0115/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70173153403714,41.88117765889178]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69821960050794,41.88123275749562]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69810942679536,41.87728470466113]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70162136032455,41.87722960605729]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0116/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p116","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0116/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0116","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1221.0,71.7 1228.8,2054.1 237.2,2054.2 227.0,562.0 -0.0,561.1 -0.0,497.6 231.0,415.8 231.3,69.2 1221.0,71.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0116/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1225.0,1060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6962375,41.8792609]}},{"type":"Feature","properties":{"resourceCoords":[227.0,562.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6987207,41.8801474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0117/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p117","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0117/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0117","type":"ImageService3","width":1417,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"227.7,69.9 1417.0,79.7 1417.0,2059.8 1202.8,2058.9 1204.0,2126.0 227.9,2126.0 227.7,69.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0117/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[228.0,565.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6962611,41.8801687]}},{"type":"Feature","properties":{"resourceCoords":[228.0,2055.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6961894,41.8774338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0118/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p118","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0118/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0118","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"413.7,76.2 1419.0,77.1 1419.0,2062.2 428.2,2065.2 413.7,76.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0118/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69436251706034,41.88123208050778]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69090382122872,41.881264084453456]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69083987201964,41.87737862441164]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69429856785126,41.877346620465964]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0119/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p119","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0119/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0119","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"342.0,2063.6 387.6,67.2 1233.5,86.8 1201.5,2079.5 342.0,2063.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0119/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6918459611268,41.88122028166599]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68840968810078,41.88131098356771]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68822845053221,41.877450714666075]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69166472355823,41.877360012764356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p12","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0012","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"220.0,2044.2 220.3,104.7 237.2,15.3 237.3,0.8 1419.0,0.0 1419.0,2126.0 1401.1,2054.2 220.0,2044.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[716.0,2049.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6883528,41.9066643]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.687207,41.9103236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0120/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p120","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0120/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0120","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.0,2062.8 232.0,2053.0 235.9,82.0 1027.2,89.2 1216.7,89.4 1334.7,89.2 1335.0,0.0 1419.0,0.0 1419.0,2062.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0120/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[232.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6888356,41.8802342]}},{"type":"Feature","properties":{"resourceCoords":[232.0,2053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6887591,41.8775213]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0121/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p121","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0121/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0121","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2126.0 -0.0,66.1 971.2,72.5 971.2,2126.0 -0.0,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0121/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1194.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7230345,41.8753]}},{"type":"Feature","properties":{"resourceCoords":[1194.0,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7230943,41.8771205]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0122/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p122","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0122/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0122","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,70.5 1419.0,77.9 1419.0,795.1 1195.2,794.2 1273.5,1274.1 1271.8,2126.0 -0.0,2126.0 -0.0,70.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0122/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[222.0,563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7230645,41.8762143]}},{"type":"Feature","properties":{"resourceCoords":[222.0,72.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7230943,41.8771205]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0123/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p123","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0123/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0123","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.4,778.4 -0.0,776.6 -0.0,71.6 880.2,85.2 880.9,2126.0 131.2,2126.0 144.4,778.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0123/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1066.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7134952,41.8772379]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,1561.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7129237,41.8745256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0124/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p124","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0124/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0124","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,63.0 1245.4,79.9 1226.0,2126.0 -0.0,2126.0 -0.0,63.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0124/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7139618749684,41.87734814566762]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71047258241819,41.877435195651415]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71029865258038,41.87351512661641]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71378794513059,41.873428076632614]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0125/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p125","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0125/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0125","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.0,74.7 1419.0,2126.0 221.2,2105.5 221.1,61.0 1419.0,74.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0125/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[221.0,1052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7108353,41.8754489]}},{"type":"Feature","properties":{"resourceCoords":[221.0,2041.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7107774,41.8736224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0126/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p126","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0126/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0126","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1211.8,66.5 1237.5,2126.0 463.6,2126.0 434.0,70.1 1211.8,66.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0126/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70898162545667,41.877424847634785]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70552415905077,41.877449164637646]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70547557251001,41.8735648556938]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70893303891592,41.87354053869094]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0127/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p127","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0127/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0127","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"229.8,2126.0 218.1,82.3 982.3,82.1 998.5,2126.0 229.8,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0127/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[225.0,864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7059799,41.8758906]}},{"type":"Feature","properties":{"resourceCoords":[1218.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7035643,41.8773541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0128/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p128","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0128/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0128","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1221.8,84.3 1216.5,2126.0 -0.0,2126.0 -0.0,75.5 1221.8,84.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0128/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[728.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7023377,41.8773691]}},{"type":"Feature","properties":{"resourceCoords":[225.0,2043.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7034695,41.8737184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0129/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p129","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0129/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0129","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"215.2,2126.0 199.6,78.3 1196.5,81.0 1199.5,864.0 994.3,863.9 996.0,1466.5 1200.5,1448.4 1205.0,2126.0 215.2,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0129/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[206.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7010675,41.8759368]}},{"type":"Feature","properties":{"resourceCoords":[1205.0,2051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6985499,41.8737696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p13","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0013","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"100.5,93.2 274.0,191.6 1211.5,199.9 1201.9,2081.8 29.6,2061.9 28.6,2126.0 -0.0,2126.0 -0.0,90.4 100.5,93.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[714.0,1109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7251377,41.9044535]}},{"type":"Feature","properties":{"resourceCoords":[1212.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7239819,41.9063156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0130/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p130","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0130/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0130","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.1,2126.0 205.7,1451.6 -0.0,1469.1 -0.0,863.4 206.3,864.2 205.7,77.2 1198.5,77.9 1202.8,2126.0 208.1,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0130/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[704.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6974087,41.8774167]}},{"type":"Feature","properties":{"resourceCoords":[1201.0,1457.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.696127,41.8749018]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0131/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p131","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0131/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0131","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1182.9,144.3 1199.9,868.5 1419.0,868.7 1419.0,1454.6 1184.8,1454.7 1211.4,2126.0 219.4,2122.4 209.0,150.3 1182.9,144.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0131/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1197.0,2057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6936807,41.8738181]}},{"type":"Feature","properties":{"resourceCoords":[219.0,2057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6960984,41.873794]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0132/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p132","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0132/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0132","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"181.5,1457.8 165.9,77.3 1015.6,68.3 1419.0,1446.7 1419.0,1446.7 1419.0,2126.0 214.2,2126.0 181.5,1457.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0132/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6941921170578,41.877602110168645]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69071673215453,41.87761438095554]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69069221447096,41.87370995116219]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69416759937423,41.873697680375294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0133/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p133","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0133/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0133","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1461.1 -0.0,80.1 1201.6,66.8 1213.0,866.0 1419.0,864.5 1419.0,1449.0 1216.0,1450.8 1232.2,2054.9 1006.0,2056.7 1014.5,2119.0 402.1,2126.0 402.4,1457.7 -0.0,1461.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0133/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69170491856995,41.87763263448448]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68822716301074,41.877646221737834]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68820001494849,41.87373912989481]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69167777050771,41.87372554264145]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0134/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p134","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0134/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0134","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"209.7,1454.8 414.1,1455.1 420.0,866.2 212.4,865.6 208.9,60.5 1412.9,63.4 1419.0,2126.0 -0.0,2126.0 -0.0,2063.2 220.0,2063.6 209.7,1454.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0134/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68926942474073,41.87762580421918]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68581788284236,41.87766484025558]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6857398867433,41.873787198250994]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68919142864168,41.873748162214596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0135/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p135","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0135/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0135","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2065.7 -0.0,78.8 1354.3,75.3 1353.4,-0.0 1419.0,-0.0 1419.0,2126.0 1336.0,2126.0 1335.4,1983.2 481.0,1985.1 -0.0,2065.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0135/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71553245651968,41.875908730140615]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71546122761629,41.87329730370017]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7207161294005,41.8732178468799]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7207873583039,41.87582927332035]}},{"type":"Feature","properties":{"resourceCoords":[1271.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7180924,41.87353]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p14","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0014","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1220.8,2066.5 233.0,2056.0 227.5,82.8 1218.1,92.4 1220.8,2066.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[233.0,2056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7238681,41.9026965]}},{"type":"Feature","properties":{"resourceCoords":[724.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.722758,41.9063229]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p15","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0015","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.0,2076.0 77.1,2073.5 65.5,102.9 1050.0,105.2 1057.1,1058.0 761.4,1639.4 1419.0,2000.4 1419.0,2076.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[555.0,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7203316,41.9063478]}},{"type":"Feature","properties":{"resourceCoords":[1050.0,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7190697,41.9045451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0016","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"379.1,1045.8 377.4,194.8 1192.6,196.7 1151.5,2073.2 876.3,2070.4 752.2,2001.5 736.8,2069.8 737.2,1993.8 79.2,1627.9 379.1,1045.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[870.0,1081.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7178449,41.9045648]}},{"type":"Feature","properties":{"resourceCoords":[372.0,1081.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7190697,41.9045451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0017","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2069.6 -0.0,93.9 1171.0,78.0 1195.0,1068.8 998.2,1070.8 1011.8,1967.7 213.3,1985.6 214.9,2067.1 -0.0,2069.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71709841249847,41.90655308812857]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71362837905042,41.90655234181107]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71362987090751,41.90265568826888]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71709990435556,41.902656434586376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0018","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1184.1,69.6 1202.8,2057.2 -0.0,2048.5 -0.0,1058.8 196.8,1059.7 187.6,69.0 1184.1,69.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71469632506329,41.90653076757276]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71122564705585,41.90656921734627]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71114878758797,41.90267183991672]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7146194655954,41.902633390143215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p19","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0019","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.8,2062.8 192.2,76.8 1419.0,79.8 1419.0,2071.3 207.8,2062.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[200.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7117389,41.9046152]}},{"type":"Feature","properties":{"resourceCoords":[1197.0,1566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7092614,41.903733]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0002","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.3,104.1 273.3,103.8 272.6,0.0 972.9,0.0 976.5,2028.4 207.6,2026.2 194.3,104.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[700.0,2029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.722758,41.9063229]}},{"type":"Feature","properties":{"resourceCoords":[1190.0,2029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7215401,41.9063354]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0020","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"445.0,2062.2 431.1,81.0 1416.0,72.1 1416.0,2126.0 1400.5,2071.3 445.0,2062.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[211.0,1068.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7092964,41.9046422]}},{"type":"Feature","properties":{"resourceCoords":[1202.0,1068.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7068419,41.9046589]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0021","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1199.7,78.9 1203.2,2052.4 -0.0,2052.2 -0.0,-0.0 201.0,0.0 201.6,77.4 1199.7,78.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.697457243537,41.90672772279661]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69395423572718,41.906762335799534]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69388489899671,41.90282033199163]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69738790680654,41.9027857189887]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0022","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1218.7,83.2 1231.0,2061.8 230.9,2062.7 224.9,83.0 1218.7,83.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69504397254205,41.90675918805837]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69155175535894,41.9067904565548]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69148911831063,41.90286059751503]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69498133549374,41.9028293290186]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0023","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"186.4,2069.9 195.6,89.7 1186.8,100.8 1183.8,2079.8 186.4,2069.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69252293521959,41.90678961915728]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68903428724082,41.90684934794493]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68891463845279,41.90292350827845]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69240328643156,41.9028637794908]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p24","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0024","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"229.9,76.6 1416.0,85.6 1415.7,2126.0 231.0,2126.0 229.9,76.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1222.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6870721,41.9048414]}},{"type":"Feature","properties":{"resourceCoords":[728.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6883528,41.9066643]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0025","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2126.0 -0.0,72.3 1179.9,74.6 1200.2,2063.6 128.4,2063.1 129.0,2126.0 -0.0,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72675826257682,41.902804252051574]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72329268704257,41.90283914965588]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72322278449677,41.898939029349144]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72668836003102,41.898904131744835]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p26","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0026","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1179.5,2076.5 193.0,2066.0 191.9,72.6 1181.7,85.5 1179.5,2076.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[193.0,2066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7237529,41.8990482]}},{"type":"Feature","properties":{"resourceCoords":[691.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7226404,41.9027058]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p27","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0027","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.7,2047.3 210.0,73.4 1416.0,83.5 1416.0,1068.0 1195.0,1065.8 1196.6,2059.0 208.7,2047.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[706.0,1061.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7201478,41.9009121]}},{"type":"Feature","properties":{"resourceCoords":[706.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7202028,41.9027268]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p28","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0028","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"455.8,1058.8 464.9,65.8 595.6,68.0 611.7,0.0 735.1,70.2 1224.0,80.0 1219.8,2075.7 225.3,2056.2 232.9,1054.5 455.8,1058.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[728.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7177168,41.9009349]}},{"type":"Feature","properties":{"resourceCoords":[1224.0,80.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7165742,41.9027643]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0029","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.9,2060.1 193.0,0.0 986.0,0.0 985.3,92.5 952.5,92.0 977.9,2068.7 207.9,2060.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71705336824647,41.902905771794515]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71356678327659,41.90296375663902]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71345063504384,41.89903999914639]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71693722001372,41.898982014301886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0003","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2055.9 0.0,-0.0 1419.0,0.0 1419.0,34.3 1283.2,34.8 1283.9,121.0 1186.3,120.1 1197.9,727.4 1364.9,1080.5 1103.3,1080.2 1199.7,1309.2 1205.7,2059.0 -0.0,2055.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72214990071012,41.91011528887707]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71866498807393,41.91015623623092]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7185831314628,41.90624309335362]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72206804409899,41.90620214599978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0030","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2047.2 -0.0,63.1 1416.0,101.3 1416.0,2081.1 -0.0,2047.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71470834497849,41.902891049324765]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71123567494637,41.90298218132251]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71105313034471,41.89907408346777]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71452580037683,41.898982951470025]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p31","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0031","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"418.9,68.2 1139.6,75.8 1141.0,1937.0 442.7,1929.1 418.9,68.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1141.0,1937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7093416,41.8993884]}},{"type":"Feature","properties":{"resourceCoords":[665.0,71.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7106187,41.9028006]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p32","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0032","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1416.0,2043.2 407.2,2047.7 182.0,1930.5 152.4,67.7 1416.0,75.7 1416.0,2043.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1245.0,1056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7067317,41.9010085]}},{"type":"Feature","properties":{"resourceCoords":[182.0,1931.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7093416,41.8993884]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0033","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1216.0,1389.1 1219.1,2037.4 -0.0,2033.0 0.0,-0.0 1416.0,0.0 1416.0,82.9 1212.6,81.8 1215.9,1062.0 1416.0,1062.7 1416.0,1389.5 1216.0,1389.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70237581975154,41.90302256520983]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69886133929121,41.90306473813848]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69877686346942,41.899109592476385]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70229134392974,41.899067419547734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0034","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.8,2047.7 205.8,1398.5 406.1,1399.2 425.1,1072.0 206.3,1070.9 204.6,89.4 408.3,90.8 408.5,7.8 1000.9,0.0 1000.5,94.8 1205.0,95.6 1206.0,2058.2 207.8,2047.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6998740272002,41.90306571099317]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69636458513666,41.903112294949935]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69627127358041,41.89916282301413]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69978071564394,41.89911623905736]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0035","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.3,95.5 1209.3,97.0 1217.6,1981.3 217.7,1986.5 210.3,95.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69740688200208,41.9030991142944]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69390593136727,41.90313684461961]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69383035434913,41.899196930129285]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69733130498395,41.899159199804075]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p36","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0036","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1206.1,84.5 1227.0,2050.0 237.2,2058.0 217.0,89.0 1206.1,84.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[217.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6944136,41.9029515]}},{"type":"Feature","properties":{"resourceCoords":[1227.0,2050.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.691854,41.8993274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0037","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1195.5,91.7 1202.0,2055.0 210.6,2053.0 203.7,89.0 1195.5,91.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69245537291411,41.90313460915134]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68894646167344,41.90317577495012]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68886400304721,41.89922690484557]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69237291428789,41.899185739046786]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0038","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"226.3,169.6 1415.9,165.1 1416.0,2056.2 230.8,2054.8 226.3,169.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69005380933184,41.90316458901962]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68654254447037,41.903208231594725]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68645512462116,41.89925671400926]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68996638948263,41.899213071434154]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p39","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0039","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1416.0,2061.1 -0.0,2049.8 -0.0,65.7 1416.0,80.0 1416.0,2061.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,2053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7248571,41.8953853]}},{"type":"Feature","properties":{"resourceCoords":[568.0,71.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.72497,41.899037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0004","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"231.4,1272.5 136.0,1043.4 397.3,1044.6 231.8,691.4 222.3,84.9 319.8,86.2 319.1,0.0 1267.8,0.0 1218.1,430.0 1222.9,2126.0 235.3,2126.0 231.4,1272.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71978247927606,41.91007704572699]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71629327753654,41.91012726904837]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71619287765233,41.90620930877585]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71968207939186,41.906159085454476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p40","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0040","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"225.5,76.7 1416.0,89.1 1416.0,2066.2 227.4,2053.8 225.5,76.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[362.0,2055.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7224238,41.8954097]}},{"type":"Feature","properties":{"resourceCoords":[362.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7225319,41.8990594]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p41","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0041","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.9,2055.7 141.9,69.2 1217.1,81.0 1196.2,2066.2 141.9,2055.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[72.0,2055.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7199817,41.8954304]}},{"type":"Feature","properties":{"resourceCoords":[564.0,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7188752,41.8990901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p42","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0042","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1334.0,70.2 1356.1,2070.9 -0.0,2070.0 -0.0,70.4 1334.0,70.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[350.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7163766,41.8972946]}},{"type":"Feature","properties":{"resourceCoords":[1345.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7139377,41.8973156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p43","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0043","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.0,68.7 1216.0,80.0 1216.0,2059.7 1375.6,2061.2 1375.9,2126.0 230.2,2126.0 230.0,68.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1216.0,2060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.711442,41.8955055]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,80.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7115524,41.8991524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0044","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.3,2091.0 196.5,0.0 1096.5,0.0 1320.3,129.7 1228.9,128.6 1243.7,2100.4 194.3,2091.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71204290369856,41.8993574951366]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70855530494958,41.89941954703479]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70843101700804,41.89549443006989]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71191861575701,41.8954323781717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0045","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,64.9 1101.4,78.4 1102.7,0.0 1256.6,0.0 1230.4,2047.4 15.4,2035.2 -0.0,64.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70901240552836,41.899293931726234]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7055220396544,41.899355106108366]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7053995095527,41.8954268683557]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70888987542666,41.89536569397357]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0046","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2058.2 -0.0,-0.0 1416.0,0.0 1416.0,2057.6 -0.0,2058.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70591508670574,41.89935535340441]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70243549360997,41.899383012453264]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70238009341257,41.89546690677162]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70585968650835,41.89543924772276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0047","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1229.5,2059.4 -0.0,2033.3 -0.0,-0.0 29.4,0.0 28.2,92.1 1243.8,110.8 1229.5,2059.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7023717411715,41.89941067300625]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69884804503863,41.89948431204349]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69870054836538,41.895518571107196]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70222424449825,41.89544493206996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p48","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0048","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"196.0,2057.0 196.0,93.0 1190.7,106.2 1189.0,2062.3 196.0,2057.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[196.0,2057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6991692,41.895633]}},{"type":"Feature","properties":{"resourceCoords":[196.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.699269,41.8992686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p49","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0049","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.0,1974.5 207.5,0.0 1205.8,0.0 1203.7,1973.9 207.0,1974.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,2042.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6966994,41.8956607]}},{"type":"Feature","properties":{"resourceCoords":[704.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6955647,41.8992904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0005","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1177.1,39.9 1196.2,2026.2 203.7,2022.8 194.9,429.1 243.3,0.0 1419.0,0.0 1419.0,39.8 1177.1,39.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71726468711351,41.91011402779951]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7137687412534,41.91015741002321]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71368201650665,41.90623190807736]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71717796236676,41.90618852585366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p50","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0050","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1192.1,74.8 1198.9,2050.6 196.1,2047.1 189.9,75.7 1192.1,74.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[193.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6942766,41.8974856]}},{"type":"Feature","properties":{"resourceCoords":[1196.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6918077,41.8975142]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p51","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0051","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.4,2064.7 203.6,86.7 1202.2,88.5 1208.8,2068.5 210.4,2064.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1206.0,1077.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6893513,41.8975426]}},{"type":"Feature","properties":{"resourceCoords":[207.0,1077.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6918077,41.8975142]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0052","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"197.6,2054.3 178.9,89.0 1393.1,81.6 1372.6,0.0 1416.0,0.0 1416.0,2126.0 1402.2,2048.7 197.6,2054.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68983950594777,41.89951357434568]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6863545781125,41.89953823646113]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68630518056973,41.895616135367966]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.689790108405,41.895591473252516]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p53","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0053","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1230.6,2065.9 114.8,2057.1 114.7,2126.0 -0.0,2126.0 -0.0,0.0 45.5,0.0 45.6,89.0 1237.6,97.8 1230.6,2065.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[606.0,2061.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7247449,41.8917082]}},{"type":"Feature","properties":{"resourceCoords":[606.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7248571,41.8953853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p54","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0054","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1318.6,84.6 1325.3,2059.9 -0.0,2054.1 -0.0,75.1 1318.6,84.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1322.0,1072.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7199261,41.8935966]}},{"type":"Feature","properties":{"resourceCoords":[340.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7224238,41.8954097]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p55","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0055","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.0,72.8 1416.0,73.6 1416.0,2027.0 95.5,2034.6 76.0,72.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[584.0,1073.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7186993,41.8936081]}},{"type":"Feature","properties":{"resourceCoords":[86.0,1073.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7199261,41.8935966]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p56","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0056","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.3,79.3 1323.9,92.4 1324.5,2126.0 212.8,2126.0 213.1,2058.1 179.1,2057.8 198.3,79.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[836.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7150403,41.8936421]}},{"type":"Feature","properties":{"resourceCoords":[836.0,2063.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7149856,41.8918158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p57","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0057","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1416.0,2062.8 87.0,2048.9 92.0,149.1 1233.0,152.2 1232.9,87.6 1416.0,89.4 1416.0,2062.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[576.0,2054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.712557,41.8918426]}},{"type":"Feature","properties":{"resourceCoords":[1074.0,86.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.711442,41.8955055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0058","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"180.2,2054.2 183.2,80.0 1320.1,93.2 1304.7,2067.7 180.2,2054.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[822.0,1078.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7089394,41.893702]}},{"type":"Feature","properties":{"resourceCoords":[325.0,2056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7101086,41.8918696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p59","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0059","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.6,2055.9 217.6,78.9 1203.3,88.3 1210.0,2062.1 213.6,2055.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[712.0,2059.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7064384,41.8919101]}},{"type":"Feature","properties":{"resourceCoords":[712.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7065414,41.8955597]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p6","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0006","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1200.0,2036.0 205.7,2026.2 201.7,15.6 1216.8,0.0 1200.0,2036.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1200.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.711885,41.9091399]}},{"type":"Feature","properties":{"resourceCoords":[1200.0,2036.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7117977,41.9064352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0060","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"94.5,2065.0 75.8,80.7 1245.4,85.3 1369.4,2065.6 94.5,2065.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70551098509598,41.89571425772681]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70204128010248,41.895753671338184]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70196234041079,41.89184847054354]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7054320454043,41.89180905693217]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p61","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0061","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.3,1999.3 -0.0,1988.1 -0.0,7.9 107.4,0.0 107.0,15.1 1032.4,70.0 1416.0,324.6 1416.0,2126.0 169.9,2126.0 179.3,1999.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70245757748299,41.895606800225465]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69896729594562,41.89580768041917]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6985622138324,41.89190597456564]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70205249536977,41.891705094371936]}},{"type":"Feature","properties":{"resourceCoords":[1032.0,70.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6998994,41.8956248]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0062","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,110.2 -0.0,58.3 1205.9,48.0 1216.2,775.5 996.6,656.3 1016.8,2117.6 438.7,2071.0 311.2,284.6 -0.0,110.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69967851384457,41.89573517608591]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69618121852189,41.895751994470714]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6961475337833,41.8918157376648]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69964482910599,41.89179891927999]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0063","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.1,791.8 216.8,0.0 1212.4,0.0 1210.3,1335.6 1416.0,1451.7 1416.0,2126.0 -0.0,2126.0 -0.0,670.0 217.1,791.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69724013533758,41.895776879453045]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69373026962437,41.89583005719508]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69362376227589,41.89187965936208]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6971336279891,41.89182648162005]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0064","type":"ImageService3","width":1416,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"407.8,2126.0 406.4,1457.0 199.0,1340.5 198.5,70.7 1004.8,75.7 1009.1,2126.0 407.8,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69472313354754,41.895807262889655]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69123794956364,41.895854828921905]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6911426816432,41.891932211400245]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6946278656271,41.891884645367995]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0065","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"613.2,2126.0 297.8,1953.3 11.4,1950.5 -0.0,66.2 1199.7,70.8 1217.0,2126.0 613.2,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69224908240875,41.89582288903048]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68878997464238,41.895863304537016]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68870874133613,41.89195624092657]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6921678491025,41.89191582542003]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p66","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0066","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1411.0,76.8 1411.0,2126.0 1376.2,2126.0 1375.9,2053.6 214.8,2046.9 210.5,66.7 1411.0,76.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1210.0,1562.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.686754,41.8930207]}},{"type":"Feature","properties":{"resourceCoords":[208.0,568.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6892835,41.8948057]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0067","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.2,2126.0 60.9,67.8 1411.0,69.2 1411.0,1783.3 870.0,1787.5 872.6,2126.0 70.2,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72613020421355,41.891817986098054]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72265397759047,41.89185908767181]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7225713704645,41.887932443817796]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72604759708757,41.88789134224404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0068","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"180.4,1773.8 183.3,59.2 1312.2,62.3 1317.5,1059.3 1258.7,1059.1 1259.5,2126.0 1045.7,2126.0 1043.6,1768.7 180.4,1773.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72310526023931,41.891834677802024]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7196299843127,41.89188007007183]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71953875360256,41.88795450094649]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72301402952917,41.88790910867669]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0069","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1238.1,1781.8 1268.5,1837.9 1356.6,1862.4 1357.2,2126.0 -0.0,2126.0 -0.0,1037.2 58.9,1037.5 54.1,0.0 1376.8,0.0 1376.6,43.0 1411.0,43.1 1411.0,797.6 1220.4,797.0 1219.2,1042.7 1411.0,1043.0 1411.0,1188.2 1363.3,1366.5 1244.8,1382.3 1238.1,1781.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72000596258256,41.891831706893115]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71653615752132,41.89187894103909]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71644122497835,41.88795955066249]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7199110300396,41.88791231651651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0007","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1198.0,2029.0 206.3,2019.7 221.4,0.0 1419.0,31.2 1419.0,77.7 1196.8,76.4 1198.0,2029.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[206.0,1535.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7118263,41.9073262]}},{"type":"Feature","properties":{"resourceCoords":[1198.0,2029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7093477,41.9064604]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p70","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0070","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.2,2126.0 139.4,1874.7 52.4,1850.8 22.1,1795.3 16.8,1416.4 143.7,1381.8 189.9,1204.5 189.2,1060.2 -0.0,1060.8 -0.0,816.6 188.1,816.3 184.9,134.4 1293.9,124.5 1312.4,2126.0 141.2,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[309.0,66.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7162242,41.8918035]}},{"type":"Feature","properties":{"resourceCoords":[806.0,66.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7149856,41.8918158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0071","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1198.0,77.4 1186.2,2126.0 1093.6,2126.0 1093.3,1998.6 108.8,2000.2 105.0,70.8 1198.0,77.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71403470001269,41.8919567335585]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7105390910944,41.892011009608375]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71043000550378,41.888062472926]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71392561442207,41.88800819687613]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p72","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0072","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1411.0,2126.0 -0.0,2126.0 -0.0,67.0 1411.0,67.0 1411.0,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,67.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7088869,41.8918831]}},{"type":"Feature","properties":{"resourceCoords":[1339.0,67.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.707675,41.8918965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0073","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1224.1,71.5 1223.0,1855.1 604.0,1854.0 604.7,2126.0 164.3,2126.0 172.8,66.9 1224.1,71.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7079222726527,41.89201615590475]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70444200076662,41.892065990160425]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70434184213576,41.888134789039505]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70782211402184,41.88808495478383]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0074","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1395.2,2126.0 -0.0,2126.0 -0.0,64.5 1317.6,69.5 1315.7,195.4 1411.0,189.9 1395.2,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70490261646287,41.89204691286629]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70140653307195,41.89209546445775]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70130895254846,41.888146396544506]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70480503593939,41.888097844953045]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0079","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1411.0,1490.8 1411.0,1887.6 -0.0,1910.6 -0.0,-0.0 290.6,0.0 612.6,172.0 981.0,168.3 985.4,371.3 1222.8,498.2 1237.3,1444.7 1411.0,1490.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69214648839508,41.892238733391125]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68873812270868,41.8922529775795]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68870949416423,41.88840300959557]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69211785985063,41.88838876540719]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p8","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0008","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.9,2020.4 211.0,84.0 431.4,85.5 431.4,39.4 -0.0,35.7 -0.0,-0.0 1419.0,0.0 1419.0,2028.4 210.9,2020.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[211.0,1540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.709376,41.9073509]}},{"type":"Feature","properties":{"resourceCoords":[211.0,84.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7094626,41.9100497]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0080","type":"ImageService3","width":1411,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1241.2,1997.6 1242.8,2126.0 1215.8,2126.0 1221.8,1879.1 386.9,1864.0 395.3,1473.5 225.3,1424.5 230.9,492.9 -0.0,363.0 -0.0,163.2 240.4,165.9 242.7,91.3 1411.0,103.2 1411.0,2126.0 1299.9,2126.0 1302.0,2006.5 1241.2,1997.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68978529410114,41.892243913438996]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68632368053672,41.892313921130274]}},{"type":"Feature","properties":{"resourceCoords":[1411.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68618297608812,41.88840381087126]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.68964458965254,41.88833380317998]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0082","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1413.0,2126.0 -0.0,2126.0 -0.0,-0.0 1413.0,0.0 1413.0,2126.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7239172967967,41.88854197137633]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72045898994297,41.88860251511834]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72033748591234,41.88470144014532]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72379579276607,41.884640896403305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p83","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0083","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,204.2 18.4,204.3 18.6,193.7 1193.2,212.1 1177.7,1954.4 1413.0,1980.0 1413.0,2126.0 -0.0,2126.0 -0.0,204.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[198.0,1505.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7160339,41.8855633]}},{"type":"Feature","properties":{"resourceCoords":[198.0,512.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7161054,41.8873987]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p84","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0084","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.6,1878.4 202.7,0.0 1188.0,0.0 1182.8,2126.0 -0.0,2126.0 -0.0,2051.9 435.8,2049.1 434.9,1902.5 198.6,1878.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1188.0,1054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7111648,41.8863445]}},{"type":"Feature","properties":{"resourceCoords":[1188.0,448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7111985,41.8874613]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0085","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"228.3,1905.5 224.8,40.0 319.1,39.8 318.9,79.6 1049.6,82.2 1056.6,1984.1 228.3,1905.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0085/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71176596766875,41.88811583605203]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70832340602877,41.88816312555044]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70822850229233,41.884279786427804]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71167106393231,41.88423249692939]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0086","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1179.8,30.9 1178.1,2080.8 -0.0,1963.4 -0.0,62.7 1179.8,30.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70920844250948,41.888115404847035]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70576389757726,41.88817217284953]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7056499717254,41.88428659710642]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70909451665763,41.88422982910392]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p87","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0087","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1179.5,2049.6 -0.0,2053.8 -0.0,1440.5 286.6,1440.2 284.9,56.8 1182.5,72.3 1179.5,2049.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[586.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7038566,41.887555]}},{"type":"Feature","properties":{"resourceCoords":[586.0,75.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.701393,41.8875869]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0088","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1334.3,86.7 1156.5,2058.2 54.9,2062.2 58.6,91.9 1334.3,86.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70113353428945,41.886594122599206]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70107121744951,41.88394725951626]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7063830416538,41.883876962741134]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70644535849374,41.88652382582408]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0089","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1206.0,129.6 1203.3,2059.0 -0.0,2038.8 -0.0,0.0 28.7,-0.0 28.3,126.3 1206.0,129.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69629420395755,41.888788067359904]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69623481545624,41.88615546488511]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70151820387615,41.88608847375445]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70157759237746,41.888721076229245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p9","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0009","type":"ImageService3","width":1419,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1188.3,0.0 1212.0,2069.0 207.9,2079.1 206.4,2000.7 4.2,2003.0 0.0,-0.0 1188.3,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1212.0,2069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6944869,41.9066108]}},{"type":"Feature","properties":{"resourceCoords":[178.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.697038,41.9102312]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p90","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0090","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.8,2048.1 66.2,134.4 1293.7,134.2 1291.5,69.9 1413.0,69.2 1413.0,1051.9 1325.7,1052.6 1352.3,2039.5 67.8,2048.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6988635,41.8854887]}},{"type":"Feature","properties":{"resourceCoords":[616.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6964046,41.8855158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0091","type":"ImageService3","width":1413,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1197.4,124.7 1194.5,2126.0 -0.0,2126.0 -0.0,118.6 1197.4,124.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6913980309089,41.88878648754639]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69134913938022,41.886190977673024]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69655809034518,41.88613582732858]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69660698187386,41.888731337201946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0092","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1342.0,1076.8 1378.1,2126.0 138.6,2126.0 143.4,131.8 1310.6,138.9 1341.2,1040.4 1301.0,1060.5 1342.0,1076.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0092/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69135955391302,41.8868515083669]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6913068058137,41.88423918441421]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69653085177136,41.88417989175649]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.69658359987068,41.88679221570918]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p93","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0093","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1215.5,0.8 1218.7,2126.0 -0.0,2126.0 -0.0,75.1 248.2,84.0 247.7,57.0 118.7,60.9 126.5,-0.0 1215.5,0.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1216.0,1558.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6902654,41.8865981]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6865891,41.8866227]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p94","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0094","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1218.3,-0.0 1310.2,2126.0 138.8,2126.0 135.4,-0.0 1218.3,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[136.0,1553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6902654,41.8865981]}},{"type":"Feature","properties":{"resourceCoords":[136.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6865891,41.8866227]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p95","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0095","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1418.0,1864.7 0.0,1915.3 0.0,-0.0 1418.0,0.0 1418.0,1864.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0095/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72854928581971,41.88528380610482]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7285053287686,41.88789372509338]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72324975667311,41.88784465581881]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72329371372422,41.885234736830256]}},{"type":"Feature","properties":{"resourceCoords":[95.0,1590.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7246145,41.885422]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0096","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1336.6,1958.3 1292.4,2126.0 -0.0,2126.0 -0.0,0.0 1309.1,-0.0 1336.6,1958.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72070228781965,41.88319220072147]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72065010999658,41.8805990814715]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.72583548358674,41.880540426820886]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7258876614098,41.88313354607085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p97","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"1"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0097","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2065.3 -0.0,193.7 227.4,193.7 228.2,44.7 1418.0,163.3 1418.0,2126.0 1244.0,2126.0 1244.1,2073.6 -0.0,2065.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71169111124856,41.884715678697084]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70818635668373,41.884774284569616]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7080683425271,41.88086192558068]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.71157309709193,41.88080331970815]}},{"type":"Feature","properties":{"resourceCoords":[230.0,2067.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.7110079,41.8809214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0098","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1176.1,2053.8 377.0,2056.9 357.9,135.4 1156.6,207.7 1176.1,2053.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7090553678498,41.88471319579546]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70559316534789,41.884746089681656]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70552738779179,41.88085416903769]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7089895902937,41.8808212751515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1896 | sanborn01790_003 p99","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T03:50:05Z","modified":"2026-09-21T03:50:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0099","type":"ImageService3","width":1418,"height":2126},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1206.8,272.6 1212.5,2003.7 217.8,1998.4 210.4,176.8 1206.8,272.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g01790189611:01790_11_1896-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7067540787165,41.884680242948306]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70324548961997,41.88473083783271]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.7031443159512,41.88078675817728]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2126.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.70665290504773,41.88073616329287]}}]}}]}