{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01790_075.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chicago, Illinois | 1910 | mapsnap generated fit (2026-09-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-24"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"125"},{"label":"placed","value":"113"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef 80, georef-snap 28, georef-street 3, snap:0 1, snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"7 sheet(s) cut into 15 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.02233,-87.95415 +/-260m); p105 (tier 1, 41.72988,-87.65071 +/-261m); p112__1 (tier 1, 41.72156,-87.59195 +/-170m); p114 (tier 1, 41.71774,-87.64979 +/-263m); p18__2 (tier 1, 41.76654,-87.62734 +/-106m); p24__2 (tier 2, 41.75623,-87.63805 +/-252m); p42__2 (tier 1, 41.75170,-87.63482 +/-134m); p42__3 (tier 1, 41.74999,-87.63999 +/-100m); p52__1 (tier 1, 41.72872,-87.64282 +/-224m); p52__2 (tier 1, 41.72992,-87.64407 +/-225m); p77__1 (tier 2, 41.75986,-87.59940 +/-211m); p96__2 (tier 1, 41.74826,-87.58405 +/-100m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p1","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0001/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 0.0,0.0 5764.0,0.0 5764.0,8418.9 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4456.0,4416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6516413,41.7632764]}},{"type":"Feature","properties":{"resourceCoords":[2440.0,8404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6528096,41.7614493]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0010/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,467.1 4966.5,443.7 4969.5,8504.0 -0.0,8504.0 -0.0,467.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65420168775648,41.76164078070217]}},{"type":"Feature","properties":{"resourceCoords":[5744.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.650740762623,41.76167816503601]}},{"type":"Feature","properties":{"resourceCoords":[5744.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65066708468143,41.757829040101605]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65412800981491,41.75779165576777]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p100","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0100/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0100/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4277.7,8214.6 -0.0,8200.9 -0.0,-0.0 5740.0,0.0 5740.0,8504.0 4221.3,8504.0 4277.7,8214.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5060.0,4192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6016012,41.7348758]}},{"type":"Feature","properties":{"resourceCoords":[5832.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.601184,41.7366967]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p101","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0101/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0101/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,-0.0 1438.8,0.0 1456.2,2274.3 5486.7,2278.4 5474.7,8313.7 5457.4,8313.7 5457.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4128.0,4288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6095344,41.7311008]}},{"type":"Feature","properties":{"resourceCoords":[4128.0,260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6095827,41.732924]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p102","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0102/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0102/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8330.2 -0.0,2284.7 1681.0,2276.3 1661.6,258.3 5740.0,248.7 5740.0,8316.8 -0.0,8330.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2624.0,4288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6071184,41.7311383]}},{"type":"Feature","properties":{"resourceCoords":[2624.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6071618,41.7329603]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p103","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"19"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0103/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0103/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"499.3,8241.2 591.6,218.6 5740.0,265.5 5740.0,8200.0 499.3,8241.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1416.0,6248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6046601,41.7302604]}},{"type":"Feature","properties":{"resourceCoords":[5520.0,2232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6022265,41.7321394]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p104","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"22"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0104/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0104/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"500.5,208.5 4500.4,270.8 4334.1,8504.0 3513.3,8504.0 3516.9,8201.2 346.6,8210.0 500.5,208.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0104/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1240.0,6224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6045757,41.7266188]}},{"type":"Feature","properties":{"resourceCoords":[3444.0,4232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6032742,41.7275621]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p106","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0106/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0106/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,174.0 5744.0,160.6 5744.0,8192.6 -0.0,8178.8 -0.0,174.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2620.0,6176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6070097,41.7265773]}},{"type":"Feature","properties":{"resourceCoords":[2620.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6070749,41.7293144]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p107","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0107/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0107/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1665.7,0.0 1667.8,270.2 4788.8,245.0 4910.9,8204.3 5744.0,8197.7 5744.0,8504.0 -0.0,8504.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0107/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6096249882548,41.725761531889134]}},{"type":"Feature","properties":{"resourceCoords":[5744.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60606996135417,41.72578857553858]}},{"type":"Feature","properties":{"resourceCoords":[5744.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60601669279647,41.72183258821099]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6095717196971,41.72180554456154]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p108","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0108/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0108/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,316.4 5752.0,272.7 5752.0,8504.0 840.2,8504.0 842.2,8370.0 -0.0,8363.7 -0.0,316.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0108/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60666453889603,41.72581566904933]}},{"type":"Feature","properties":{"resourceCoords":[5752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60314405660678,41.72588304927911]}},{"type":"Feature","properties":{"resourceCoords":[5752.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6030115205119,41.7219709557465]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60653200280115,41.72190357551672]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p109","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0109/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0109/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8156.3 -0.0,259.5 1192.4,172.1 1190.3,0.0 5752.0,0.0 5752.0,8504.0 -0.0,8504.0 -0.0,8300.3 -0.0,8156.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0109/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4744.0,4216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.599765,41.7276099]}},{"type":"Feature","properties":{"resourceCoords":[4744.0,244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5998059,41.7294254]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0011/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,478.2 5744.0,452.0 5744.0,8504.0 -0.0,8504.0 -0.0,478.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1344.0,472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6503796,41.7614841]}},{"type":"Feature","properties":{"resourceCoords":[5304.0,7432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6478838,41.7583264]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p110","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0110/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0110/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8216.1 -0.0,-0.0 5752.0,0.0 5752.0,344.2 5235.3,344.8 5265.8,8204.6 -0.0,8216.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0110/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5990991086936,41.729597359069054]}},{"type":"Feature","properties":{"resourceCoords":[5752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59555241845435,41.729640890076084]}},{"type":"Feature","properties":{"resourceCoords":[5752.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59546678845473,41.72569990509301]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59901347869398,41.72565637408598]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p111","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0111/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0111/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,204.5 522.4,205.7 523.2,0.0 5752.0,0.0 5752.0,2590.3 5277.7,2589.0 5273.3,4212.8 5442.9,4213.2 5431.3,8504.0 1932.6,8504.0 1932.8,8227.5 -0.0,8227.4 -0.0,204.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5432.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5924576,41.7258859]}},{"type":"Feature","properties":{"resourceCoords":[1488.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5949602,41.7294891]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0112__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p112 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5752.0"},{"label":"split_canvas_h","value":"4557.6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0112__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0112/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5752.0,-0.0 61.3,-0.0 61.1,4556.4 5752.0,4557.6 5752.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0112__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3956.0,4425.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5972727,41.7240253]}},{"type":"Feature","properties":{"resourceCoords":[3956.0,480.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5948408,41.7240602]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p113","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0113/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0113/info.json","type":"ImageService2","height":8504,"width":5752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1608.0,8336.0 1608.1,8504.0 -0.0,8504.0 -0.0,2538.7 5752.0,2521.2 5752.0,8336.0 1608.0,8336.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0113/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1608.0,8336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5924999,41.7277068]}},{"type":"Feature","properties":{"resourceCoords":[5580.0,8336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5924576,41.7258859]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p115","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0115/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0115/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2540.0,8326.3 -0.0,8317.7 -0.0,-0.0 5728.0,0.0 5702.5,8141.4 2540.6,8107.9 2540.0,8326.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0115/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58897982399951,41.729673592163685]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58547926253964,41.72972759633187]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58537258544224,41.725821577954505]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58887314690212,41.72576757378632]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0116/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p116","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0116/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0116/info.json","type":"ImageService2","height":8504,"width":5792},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5792.0,0.0 5792.0,8504.0 -0.0,8504.0 -0.0,362.7 2321.4,440.4 2328.7,220.1 5487.6,350.5 5502.5,0.0 5792.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0116/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58875411243395,41.72602133493807]}},{"type":"Feature","properties":{"resourceCoords":[5792.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58521770039937,41.726155813905855]}},{"type":"Feature","properties":{"resourceCoords":[5792.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58495500750395,41.72225317566221]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58849141953853,41.72211869669442]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p12","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0012/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"696.1,8504.0 744.3,489.8 5744.0,497.8 5744.0,8504.0 696.1,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2248.0,4468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6466998,41.7597133]}},{"type":"Feature","properties":{"resourceCoords":[2248.0,492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6467503,41.7615359]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p13","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0013/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1049.1,391.5 5448.3,428.9 5335.7,8504.0 3719.2,8504.0 3729.7,8336.2 986.2,8164.0 1049.1,391.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1432.0,7336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6442387,41.7583831]}},{"type":"Feature","properties":{"resourceCoords":[5416.0,4388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6418343,41.7597891]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p14","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0014/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"725.4,440.0 726.4,0.0 4941.1,31.1 4969.3,8500.1 0.1,8459.4 50.3,440.3 725.4,440.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2008.0,4380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6406232,41.759808]}},{"type":"Feature","properties":{"resourceCoords":[5440.0,8328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6384485,41.7580185]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p15","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0015/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2816.9,8504.0 -0.0,8482.9 -0.0,-0.0 1405.7,0.0 1428.6,682.6 5744.0,533.5 5744.0,4356.4 4934.6,4353.8 4909.8,8318.2 2866.6,8344.3 2816.9,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2972.0,4356.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6369592,41.7598668]}},{"type":"Feature","properties":{"resourceCoords":[472.0,8312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6384485,41.7580185]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0016/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2280.0,360.0 5744.0,372.0 5744.0,8348.8 256.0,8336.0 283.0,4333.4 1100.2,4336.5 1102.2,476.8 2279.7,435.6 2280.0,360.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[256.0,8336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6357039,41.7580631]}},{"type":"Feature","properties":{"resourceCoords":[2280.0,360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.63458,41.7617225]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p17","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0017/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0017/info.json","type":"ImageService2","height":8504,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"964.5,8316.9 898.8,310.5 5466.2,275.6 4255.1,3571.7 4256.5,8307.5 964.5,8316.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3424.0,288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6309175,41.7617825]}},{"type":"Feature","properties":{"resourceCoords":[5408.0,8308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6296311,41.7581531]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p18 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5728.0"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0018__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0018/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.1,8286.8 108.1,8504.0 1988.0,8504.0 5728.0,8504.0 5728.0,8375.2 5728.0,279.4 1497.0,297.1 1446.0,522.0 0.0,3913.2 -0.0,8286.8 108.1,8286.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3784.0,8264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6280127,41.7581829]}},{"type":"Feature","properties":{"resourceCoords":[3784.0,288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.62809,41.7618258]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p19","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0019/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0019/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"915.2,263.3 1608.0,268.0 1611.3,0.0 4260.9,0.0 4256.4,275.3 4587.2,276.0 4517.2,0.0 5728.0,0.0 5728.0,8504.0 825.6,8504.0 915.2,263.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1608.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6264111,41.7600366]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6264761,41.76185]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0002/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"606.5,8386.2 573.7,0.0 5245.6,23.1 5235.8,8389.0 606.5,8386.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3264.0,8388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6491668,41.7615013]}},{"type":"Feature","properties":{"resourceCoords":[3264.0,392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6492634,41.7651337]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p20","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0020/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5703.1,8202.3 -0.0,8207.0 -0.0,161.3 5728.0,237.4 5703.1,8202.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3708.0,8204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6514083,41.7541724]}},{"type":"Feature","properties":{"resourceCoords":[3708.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6514955,41.7576279]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0021/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.4,8170.2 -0.0,385.8 5728.0,257.1 5728.0,8045.0 105.4,8170.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65024147084216,41.75798957839632]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64669596370712,41.757982022586525]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64671089563701,41.75402759231034]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65025640277206,41.75403514812013]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p22","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0022/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8319.4 -0.0,383.0 2976.6,220.4 2964.6,0.0 5728.0,0.0 5728.0,169.0 4785.4,228.1 4997.9,4088.2 5626.5,4053.8 5728.0,8036.6 -0.0,8319.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1856.0,8220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6453501,41.7542608]}},{"type":"Feature","properties":{"resourceCoords":[5420.0,252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6429983,41.7578439]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p23","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0023/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0023/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4175.8 -0.0,294.3 5728.0,282.6 5728.0,8490.1 2606.3,8504.0 2607.0,8171.9 620.5,8174.4 632.0,4176.0 -0.0,4175.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2616.0,4176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6417386,41.7561237]}},{"type":"Feature","properties":{"resourceCoords":[632.0,4176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6429509,41.7561047]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0024__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p24 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5728.0"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0024__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0024/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4360.6,7868.1 5431.1,7770.4 4836.6,936.6 4995.6,161.3 402.0,540.6 1115.3,8504.0 1639.6,8504.0 1654.0,7544.8 1720.4,7560.8 1696.8,7779.2 1887.6,7768.8 2466.8,7736.8 2771.2,7808.4 2745.2,7915.6 2651.2,8504.0 2762.0,8504.0 2860.0,8504.0 4229.7,8504.0 4360.6,7868.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0024__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2676.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6384485,41.7580185]}},{"type":"Feature","properties":{"resourceCoords":[992.0,8200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6398457,41.7543364]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p25","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0025/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1215.4 288.2,252.4 409.0,310.8 5728.0,4234.6 5728.0,8192.5 368.0,8216.0 304.3,8216.3 -0.0,8217.6 -0.0,1215.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[368.0,8216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6368226,41.754399]}},{"type":"Feature","properties":{"resourceCoords":[2336.0,244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6357039,41.7580631]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p26","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0026/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.3,8281.3 274.9,4316.7 1488.8,4310.2 1515.9,300.3 5728.0,286.2 5728.0,8504.0 491.8,8504.0 492.3,8279.8 286.3,8281.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4136.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6312056,41.756303]}},{"type":"Feature","properties":{"resourceCoords":[4136.0,8268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6311675,41.7544887]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p27","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0027/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0027/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,-0.0 783.4,0.0 783.4,227.0 5728.0,222.6 5728.0,8194.6 5233.7,8194.8 5234.1,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2492.0,4192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.652578,41.7523435]}},{"type":"Feature","properties":{"resourceCoords":[2492.0,8196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.652532,41.7505152]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p28","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0028/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0028/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,8504.0 -0.0,8504.0 -0.0,8187.4 495.5,8187.8 505.0,195.7 5728.0,197.5 5728.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3216.0,8184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6488833,41.7505699]}},{"type":"Feature","properties":{"resourceCoords":[1236.0,196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6501906,41.7541902]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p29","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0029/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0029/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1101.5,8504.0 1095.0,217.6 2376.6,216.8 2305.8,0.0 2673.5,0.0 2662.0,216.7 5728.0,215.4 5728.0,8251.9 4096.2,8247.8 4095.9,8504.0 1101.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4536.0,8248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6452566,41.7506218]}},{"type":"Feature","properties":{"resourceCoords":[4536.0,216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6453501,41.7542608]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0003/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"552.1,0.0 5475.0,0.0 5404.6,8365.0 528.0,8352.0 552.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[528.0,8352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6479637,41.7615186]}},{"type":"Feature","properties":{"resourceCoords":[4520.0,368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6456291,41.7651905]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p30","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0030/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0030/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5232.0,8288.0 412.2,8289.0 407.7,245.5 5230.1,259.2 5232.0,8288.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5232.0,8288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6416009,41.7506713]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6441332,41.7542716]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p31","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0031/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0031/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1111.9,598.4 4166.2,577.9 4140.2,4247.3 5728.0,4320.1 5728.0,8263.9 1112.0,8276.0 1111.9,598.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1112.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6416468,41.7524897]}},{"type":"Feature","properties":{"resourceCoords":[1112.0,8276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6416009,41.7506713]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0032/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0032/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1657.8,8222.6 1566.3,4323.6 -0.0,4265.1 -0.0,598.3 3278.4,882.5 3469.9,246.3 4951.3,240.6 4953.8,8229.6 1657.8,8222.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63983489845278,41.75446638684107]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63635326151878,41.75451556019223]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63625608948294,41.75063215711811]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63973772641694,41.75058298376695]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p33","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"23"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0033/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0033/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,8185.7 223.8,8214.5 180.5,266.6 5728.0,214.4 5728.0,8185.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2184.0,8208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6355213,41.7507659]}},{"type":"Feature","properties":{"resourceCoords":[2160.0,248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6356023,41.7544198]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0034/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0034/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"404.8,8504.0 379.2,1953.1 1502.9,-0.0 4346.7,-0.0 5728.0,1614.0 5728.0,2002.5 4295.1,8504.0 404.8,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63165414310927,41.75830920478755]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63155947391877,41.7556576593977]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63679928754122,41.75555206706742]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63689395673173,41.75820361245727]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p35","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0035/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1686.5,8504.0 -0.0,8504.0 -0.0,268.1 5127.2,268.1 5073.3,8269.1 1686.3,8269.0 1686.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4452.0,8264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6427174,41.7470185]}},{"type":"Feature","properties":{"resourceCoords":[2436.0,272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6440364,41.7506362]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p36","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0036/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0036/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8365.8 -0.0,329.5 4760.2,284.4 4795.9,4327.2 5187.8,4325.1 5355.2,8350.3 -0.0,8365.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3312.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6403787,41.7506886]}},{"type":"Feature","properties":{"resourceCoords":[3312.0,4316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6403513,41.7488719]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p37","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0037/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4310.3 -0.0,314.0 1153.8,312.5 1154.2,0.0 1243.6,293.5 5178.1,306.2 5067.9,7949.6 506.5,7946.8 387.4,4311.7 -0.0,4310.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4500.0,8268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6366315,41.7471029]}},{"type":"Feature","properties":{"resourceCoords":[4500.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6367298,41.7507508]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0038/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0038/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1841.3,8327.9 1805.3,8504.0 255.7,8504.0 253.8,8358.5 -0.0,8363.4 -0.0,318.5 4889.6,250.6 4887.6,0.0 5728.0,0.0 5728.0,8504.0 4361.4,8504.0 4411.4,8278.4 1841.3,8327.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3400.0,8284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6342144,41.7471546]}},{"type":"Feature","properties":{"resourceCoords":[1300.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6355213,41.7507659]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p39","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0039/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,186.9 3475.4,191.2 3430.8,8434.7 795.5,8504.0 795.1,8213.7 -0.0,8214.5 -0.0,186.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2768.0,4120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6426718,41.7452305]}},{"type":"Feature","properties":{"resourceCoords":[2768.0,8212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6426244,41.7433713]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p4","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0004/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5359.8,0.0 5361.5,305.2 5661.9,305.9 5697.5,8319.3 -0.0,8360.0 -0.0,77.9 286.1,75.5 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3272.0,4376.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6429956,41.7634114]}},{"type":"Feature","properties":{"resourceCoords":[1072.0,8352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6443216,41.7615706]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p40","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"2"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0040/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,305.5 5728.0,8504.0 -0.0,8504.0 -0.0,315.2 5728.0,305.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5216.0,312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6390811,41.7470555]}},{"type":"Feature","properties":{"resourceCoords":[5216.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6390151,41.7434363]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0041/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0041/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1359.5,8504.0 1404.9,341.2 889.1,344.7 877.4,0.0 5479.0,0.0 5474.7,314.0 5728.0,312.3 5728.0,7153.2 4827.5,8504.0 1359.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0041/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6396273855651,41.7472055888839]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63613418167184,41.74725616451154]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63603424985405,41.74335942016874]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63952745374732,41.7433088445411]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0042__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p42 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5728.0"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0042__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0042/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2328.0,8504.0 3410.8,8504.0 2834.8,7169.6 2491.2,6958.4 2501.6,5156.4 2747.2,4072.4 5728.0,4093.6 5728.0,299.4 3238.9,310.5 3200.1,488.0 1667.6,467.7 1668.8,7165.1 784.7,8504.0 2328.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0042__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[856.0,2276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6366072,41.7462113]}},{"type":"Feature","properties":{"resourceCoords":[4800.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6341106,41.7435057]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p43","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0043/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8160.6 -0.0,-0.0 5728.0,0.0 5728.0,8181.1 -0.0,8160.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2056.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6486389,41.741463]}},{"type":"Feature","properties":{"resourceCoords":[3968.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6474393,41.7414794]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p44","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0044/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8212.8 0.0,-0.0 2854.6,0.0 2854.0,279.2 3640.0,280.0 3639.8,566.9 5728.0,571.3 5728.0,1721.5 3640.9,3180.8 3637.8,6494.3 4301.2,7447.2 3636.6,7442.7 3491.3,8229.0 -0.0,8212.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3640.0,4248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6437767,41.7415298]}},{"type":"Feature","properties":{"resourceCoords":[3640.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6438283,41.7433535]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p45","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0045/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,-0.0 5728.0,0.0 5728.0,266.2 5319.4,265.8 5355.5,8232.1 111.8,8240.9 111.6,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4588.0,8232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6509166,41.7359735]}},{"type":"Feature","properties":{"resourceCoords":[4588.0,264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6510082,41.7396136]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p46","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0046/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5167.2,8277.4 -0.0,8262.3 -0.0,271.7 409.8,273.9 411.0,6.9 1105.4,0.0 1104.0,275.8 5224.3,313.6 5167.2,8277.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5208.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6473166,41.7378415]}},{"type":"Feature","properties":{"resourceCoords":[3224.0,300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.648587,41.7396403]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0047/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4683.1,4985.9 4710.7,8353.2 233.4,8364.7 207.2,440.0 5728.0,421.3 5728.0,1502.3 4683.1,4985.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64749299144962,41.73985546818598]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64400381795268,41.73988937827686]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64393682306061,41.73599668386795]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64742599655756,41.735962773777075]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0048/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5415.6 1061.8,1893.4 1063.3,800.2 1368.5,799.6 1511.8,0.0 2193.1,0.0 5022.1,3602.9 5728.0,3094.1 5728.0,8504.0 -0.0,8504.0 -0.0,5415.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6446476938368,41.74005166751258]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6411982249788,41.740088751570994]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64112495918907,41.73624036461274]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64457442804708,41.73620328055433]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p49","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0049/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3440.6,8323.9 -0.0,8398.4 -0.0,2724.2 1904.3,0.0 5728.0,0.0 5453.9,7549.2 3440.6,8323.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6447349,41.741506]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6418927,41.743053]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6388146,41.7399045]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6416568,41.7383575]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0005/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,355.4 0.0,-0.0 5764.0,0.0 5764.0,7971.4 294.4,7948.3 303.8,357.9 -0.0,355.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64174267315377,41.76545805840055]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6382245333777,41.76550813486289]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6381261778856,41.76160919377042]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64164431766167,41.761559117308074]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p50","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0050/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,3529.5 5716.0,8504.0 -0.0,8504.0 -0.0,8282.6 235.9,8189.1 393.9,1395.5 378.6,530.5 -0.0,537.9 -0.0,-0.0 489.0,0.0 5716.0,3529.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3848.0,7568.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6377189,41.7413497]}},{"type":"Feature","properties":{"resourceCoords":[4748.0,2560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6390151,41.7434363]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p51","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0051/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"666.2,8477.2 699.7,3089.2 2515.9,1744.7 3696.0,69.5 3818.7,252.3 4194.5,0.0 5716.0,0.0 5716.0,8504.0 562.5,8504.0 666.2,8477.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4544.0,4976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6388023,41.737867]}},{"type":"Feature","properties":{"resourceCoords":[4544.0,1112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6388504,41.7396225]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p53","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0053/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0053/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,410.8 5164.9,398.7 5175.5,8118.7 5716.0,8116.1 5716.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2516.0,8120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6520291,41.7324203]}},{"type":"Feature","properties":{"resourceCoords":[2516.0,404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.652115,41.7359551]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p54","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0054/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0054/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,4380.4 5716.0,8504.0 543.2,8504.0 543.7,8136.3 -0.0,8138.1 -0.0,371.2 5233.1,366.8 5231.1,4378.7 5716.0,4380.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1272.0,8132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6496149,41.732457]}},{"type":"Feature","properties":{"resourceCoords":[1272.0,372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6497073,41.7359904]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p55","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0055/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0055/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"462.6,4351.8 464.7,330.0 5716.0,357.2 5716.0,8504.0 948.7,8487.3 1032.5,8023.5 948.7,7988.3 948.7,4353.5 462.6,4351.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2440.0,324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6460799,41.7360481]}},{"type":"Feature","properties":{"resourceCoords":[3920.0,324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6451761,41.7360612]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0056/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0056/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5605.1,113.5 5623.9,8150.8 3603.2,8132.8 3604.3,8504.0 804.0,8504.0 792.1,336.5 -0.0,327.2 -0.0,5.9 5710.2,31.5 5605.1,113.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64456129387432,41.73620761887989]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64112181206505,41.736254646727964]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64102871108264,41.73240911921788]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6444681928919,41.7323620913698]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p57","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0057/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,8073.9 4704.8,8063.1 4704.4,8504.0 4332.7,8504.0 4332.5,8059.0 609.6,8018.4 609.0,0.0 5716.0,0.0 5716.0,8073.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[608.0,4128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.641137,41.7343314]}},{"type":"Feature","properties":{"resourceCoords":[2600.0,8040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6398761,41.7325766]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0058/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"225.5,0.0 5716.0,0.0 5716.0,8504.0 5166.2,8504.0 5164.6,8039.1 260.5,8005.6 225.5,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63821259544045,41.73620155521404]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63477934957756,41.73624302895665]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63469724404011,41.73240447413011]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.638130489903,41.732363000387494]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p59","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0059/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0059/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,551.3 129.4,551.6 129.3,189.9 5716.0,253.2 5716.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2080.0,4008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.641039,41.7308065]}},{"type":"Feature","properties":{"resourceCoords":[2080.0,212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.641088,41.7325681]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0006/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5764.0,4491.8 5515.9,8504.0 -0.0,8504.0 -0.0,-0.0 5764.0,0.0 5728.9,2967.1 5220.1,4459.3 5764.0,4491.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6382656811608,41.76546459783176]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63472596562549,41.76561693915917]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6344267508669,41.76169408967443]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6379664664022,41.761541748347014]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p60","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0060/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5724.0,8504.0 -0.0,8504.0 -0.0,177.5 5724.0,234.6 5724.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1860.0,3996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6373915,41.7308335]}},{"type":"Feature","properties":{"resourceCoords":[1860.0,196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6374372,41.7325936]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p61","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0061/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0061/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5724.0,-0.0 5724.0,8504.0 -0.0,8504.0 0.0,0.0 5724.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1768.0,7000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6331055,41.7343943]}},{"type":"Feature","properties":{"resourceCoords":[1768.0,3360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6308955,41.7344374]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0062/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5724.0,0.0 5699.0,8299.3 -0.0,8504.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61518343818038,41.76593709044433]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61163531063845,41.76598590348919]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61153876596056,41.76202627868107]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6150868935025,41.761977465636214]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p63","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0063/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"652.6,0.0 5521.4,0.0 5519.1,317.7 5571.1,317.8 5724.0,483.8 5724.0,8312.2 600.0,8308.0 652.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[600.0,8308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6115566,41.7621214]}},{"type":"Feature","properties":{"resourceCoords":[4560.0,316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6092467,41.7658151]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p64","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0064/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5724.0,0.0 5724.0,8274.7 262.9,8317.2 205.6,510.9 -0.0,346.8 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1064.0,4328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6079624,41.7640097]}},{"type":"Feature","properties":{"resourceCoords":[1064.0,8312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6079209,41.7621849]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0065/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0065/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1634.1,0.0 5724.0,0.0 5724.0,8074.1 1757.7,8195.9 1634.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60613788854297,41.76599587190895]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60264254598225,41.76600111367676]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6026321785691,41.76210039732129]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60612752112982,41.76209515555348]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p66","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0066/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1526.4,8147.2 1766.8,0.0 5724.0,11.9 5724.0,8503.3 5087.1,8492.3 4852.1,8249.1 1526.4,8147.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4912.0,4228.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6006527,41.7641169]}},{"type":"Feature","properties":{"resourceCoords":[972.0,324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6031187,41.7658251]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p67","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0067/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5724.0,0.0 5724.0,384.2 4939.3,385.1 4968.0,4240.0 4144.8,4239.2 4177.8,8276.8 4973.6,8279.7 4974.9,8504.0 1850.3,8504.0 1704.3,0.0 5724.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4968.0,4240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5982252,41.7641411]}},{"type":"Feature","properties":{"resourceCoords":[2976.0,8272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5993978,41.7623084]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p68","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0068/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0068/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4169.1 821.2,4176.6 824.0,330.6 4804.0,340.0 4784.0,8254.9 -0.0,8197.4 -0.0,4169.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4804.0,6244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5957773,41.7632464]}},{"type":"Feature","properties":{"resourceCoords":[4804.0,340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5958579,41.765917]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p69","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0069/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0069/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1050.2,418.6 -0.0,419.6 -0.0,-0.0 5724.0,2.4 5724.0,8313.8 1056.0,8272.0 1050.2,418.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1056.0,2268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5958326,41.7650739]}},{"type":"Feature","properties":{"resourceCoords":[1056.0,8272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.595762,41.7623366]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0007/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"514.7,8384.8 634.6,4415.1 86.1,4399.9 550.1,2881.7 493.2,0.0 5764.0,0.0 5764.0,8406.3 514.7,8384.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63502343218657,41.76556282828474]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63150347513232,41.7656295113317]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6313725024268,41.76172855974394]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63489245948105,41.761661876696984]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p70","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0070/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1451.6,8287.9 1470.7,0.0 4752.9,0.0 4734.9,8504.0 1885.6,8504.0 1886.4,8293.0 1451.6,8287.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[776.0,2276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5933974,41.7651003]}},{"type":"Feature","properties":{"resourceCoords":[776.0,8280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5933181,41.7623554]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0071/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0071/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5704.0,0.0 5704.0,8364.7 1044.5,8504.0 953.2,72.9 5704.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59156822148664,41.76620959575788]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58808353276767,41.7662324517423]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58803816900813,41.76232995678684]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5915228577271,41.762307100802424]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0072/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1363.6,23.4 5704.0,0.0 5704.0,8504.0 1285.4,8335.4 1363.6,23.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58892197385174,41.76623185838674]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58541573101611,41.76627962518956]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58532092397486,41.76235303984922]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58882716681049,41.7623052730464]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0073/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0073/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,167.9 5555.2,160.0 5518.6,8156.6 1500.1,8168.3 1497.5,8504.0 -0.0,8504.0 -0.0,167.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61358868354833,41.76216250282399]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61012700248648,41.76221922637565]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61001442523697,41.758342302233565]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61347610629882,41.75828557868191]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p74","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0074/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0074/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5635.3,235.5 5649.8,8122.7 -0.0,8159.3 -0.0,271.6 5635.3,235.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3696.0,4188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6078791,41.7603637]}},{"type":"Feature","properties":{"resourceCoords":[3696.0,248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6079209,41.7621849]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p75","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0075/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0075/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"507.7,257.2 5470.5,216.3 5425.2,8250.0 492.0,8236.0 507.7,257.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[492.0,8236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6066244,41.7585604]}},{"type":"Feature","properties":{"resourceCoords":[2520.0,252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6054823,41.7622276]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p76","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0076/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0076/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,221.0 5064.2,185.4 5304.2,426.0 5704.0,426.4 5704.0,8345.0 -0.0,8328.0 -0.0,221.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3084.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.601771,41.7604487]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.602977,41.760435]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0077__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p77 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3458.0"},{"label":"split_canvas_w","value":"1607.2"},{"label":"split_canvas_h","value":"3140.0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0077__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0077/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,6593.6 1607.2,6598.0 1597.2,3458.0 0.0,3473.2 0.0,6593.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0077__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,3458.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61777943136113,41.765776543342]}},{"type":"Feature","properties":{"resourceCoords":[1607.2,3458.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61679316465263,41.7657924740472]}},{"type":"Feature","properties":{"resourceCoords":[1607.2,6598.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61675138310272,41.76435853056009]}},{"type":"Feature","properties":{"resourceCoords":[0.0,6598.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61773764981122,41.764342599854885]}},{"type":"Feature","properties":{"resourceCoords":[1463.3,3690.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6168784,41.7656851]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p78","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0078/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0078/info.json","type":"ImageService2","height":8504,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,515.8 761.0,516.8 760.0,296.0 4102.0,313.6 4117.7,8069.1 -0.0,8097.5 -0.0,515.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4744.0,4292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5956955,41.7605148]}},{"type":"Feature","properties":{"resourceCoords":[760.0,296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5981868,41.7623178]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p79","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0079/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0079/info.json","type":"ImageService2","height":8508,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"469.9,8250.0 16.2,8248.1 -0.0,8112.4 -0.0,189.4 5716.0,232.2 5716.0,8248.4 580.7,8250.1 329.6,7903.4 469.9,8250.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4600.0,4232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5932747,41.7605317]}},{"type":"Feature","properties":{"resourceCoords":[4600.0,8240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5932313,41.7587083]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0008/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"274.1,8379.9 178.9,0.0 5065.7,0.0 5384.5,8342.2 274.1,8379.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63161155660939,41.76560369986767]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62810257535767,41.76564021838393]}},{"type":"Feature","properties":{"resourceCoords":[5764.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6280308489836,41.761751434093725]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63153983023531,41.761714915577464]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0080/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0080/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4271.4 -0.0,-0.0 3169.3,0.0 3170.0,282.2 5157.0,293.1 5175.5,3986.6 3090.9,3972.9 3088.8,4296.7 -0.0,4271.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59155010636194,41.76066738047488]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58807999458904,41.76071227364217]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58799108083693,41.75683419300059]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59146119260983,41.7567892998333]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p81","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0081/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0081/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1963.0,4298.0 -0.0,4293.8 -0.0,300.3 5716.0,324.3 5716.0,8504.0 5671.7,8326.1 1995.8,8310.6 1963.0,4298.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0081/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5896513,41.7625191]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5861616,41.7625553]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5860893,41.758682500000006]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.589579,41.7586463]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0082/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0082/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5674.7,8504.0 -0.0,8504.0 -0.0,336.8 5625.2,278.9 5674.7,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61257308863885,41.758611369632426]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60901062375113,41.75864878550773]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6089365258576,41.7546671389779]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61249899074532,41.754629723102596]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p83","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0083/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0083/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,8504.0 151.5,8504.0 161.9,258.8 5716.0,245.1 5716.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2152.0,4228.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6077857,41.7567141]}},{"type":"Feature","properties":{"resourceCoords":[2152.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6078374,41.7585391]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p84","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0084/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0084/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,209.3 5716.0,220.4 5716.0,4239.8 4758.1,4240.8 4772.5,8251.8 340.0,8244.0 341.5,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[340.0,4232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6053375,41.7567578]}},{"type":"Feature","properties":{"resourceCoords":[340.0,8244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6052983,41.7549393]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p85","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0085/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0085/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1550.6,8504.0 1552.0,8244.0 -0.0,8235.7 -0.0,4245.2 953.0,4247.7 967.4,248.9 4159.5,273.5 4160.7,0.0 5716.0,0.0 5633.9,277.2 5716.0,8271.5 5537.9,8269.2 5537.1,8504.0 1550.6,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3548.0,272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6005246,41.7586278]}},{"type":"Feature","properties":{"resourceCoords":[1552.0,8244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6016501,41.7549781]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p86","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0086/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0086/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5262.3,245.0 5716.0,247.3 5716.0,4139.0 5211.1,4129.9 5159.7,8029.6 1858.0,8002.2 1856.0,8212.0 -0.0,8182.3 -0.0,178.0 82.3,176.9 82.8,0.0 5247.3,0.0 5262.3,245.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1856.0,8212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5980033,41.7550083]}},{"type":"Feature","properties":{"resourceCoords":[1864.0,3084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5980692,41.7573408]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0087/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0087/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4786.4,3985.2 4893.5,4089.2 4930.7,7691.5 -0.0,7790.6 -0.0,3919.5 505.7,3922.1 454.4,59.7 5716.0,17.6 5716.0,3982.1 4786.4,3985.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59603241638555,41.75869669964345]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59254433092538,41.75872158802281]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59249504221019,41.754823081187574]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59598312767037,41.75479819280822]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0088/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0088/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5647.5,117.4 5632.8,7937.6 5062.2,8504.0 -0.0,8504.0 -0.0,3964.1 811.6,3969.8 843.8,0.0 5647.5,117.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59307246921631,41.758735109813216]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58953340792456,41.75878782252026]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58942901912644,41.75483222979598]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.59296808041819,41.754779517088934]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0089/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0089/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.1,8201.3 90.5,320.1 -0.0,319.9 -0.0,-0.0 2059.9,0.0 2063.5,309.8 5716.0,313.5 5641.0,8208.4 148.1,8201.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58963211042978,41.758879897925624]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58611991829225,41.75890795161802]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.58606436089558,41.754982510451974]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5895765530331,41.75495445675958]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p9","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0009/info.json","type":"ImageService2","height":8504,"width":5764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2892.4,8402.2 -0.0,8311.6 -0.0,10.1 5764.0,0.0 5764.0,8481.5 5500.5,8474.4 5511.6,8203.4 2902.2,8138.4 2892.4,8402.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3040.0,4452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6265109,41.7636678]}},{"type":"Feature","properties":{"resourceCoords":[976.0,436.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6279108,41.7654634]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p90","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0090/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0090/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,288.7 5716.0,309.1 5716.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4288.0,4252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5930057,41.7495861]}},{"type":"Feature","properties":{"resourceCoords":[4288.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5930503,41.7514087]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p91","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0091/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0091/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,8504.0 -0.0,8504.0 -0.0,371.4 5716.0,395.7 5716.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3912.0,4316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6027948,41.7531354]}},{"type":"Feature","properties":{"resourceCoords":[3912.0,8240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6027493,41.7513072]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p92","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0092/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0092/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,583.8 3744.5,586.7 3745.5,355.4 5688.7,382.1 5716.0,175.9 5716.0,8504.0 -0.0,8504.0 -0.0,583.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3728.0,4320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5991715,41.7531682]}},{"type":"Feature","properties":{"resourceCoords":[3728.0,8264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5991215,41.7513438]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p93","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0093/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0093/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,0.0 5716.0,8311.5 4140.1,8312.1 4140.8,8504.0 546.2,8504.0 494.3,0.0 5716.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[496.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5979509,41.7531778]}},{"type":"Feature","properties":{"resourceCoords":[4500.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5955262,41.7532036]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p94","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0094/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0094/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"266.4,68.6 -0.0,-0.0 1046.1,0.0 3280.0,0.0 3282.5,903.5 4158.5,900.8 4100.7,8282.3 245.2,8273.7 266.4,68.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3024.0,4280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5930917,41.7532355]}},{"type":"Feature","properties":{"resourceCoords":[3024.0,8280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5930503,41.7514087]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p95","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0095/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0095/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8174.5 -0.0,799.1 4238.3,752.9 4808.8,170.3 4841.8,170.5 4859.0,8496.1 370.2,8504.0 367.2,8172.5 -0.0,8174.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0095/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5924352,41.7551528]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5889178,41.7551766]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.5888706,41.7512891]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.592388,41.7512653]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0096__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p96 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5740.0"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0096__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0096/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 4627.6,8504.0 4953.6,8504.0 5137.2,8504.0 5297.2,8504.0 4865.6,7842.4 3023.6,5871.6 3914.0,6543.6 3915.3,6544.9 4768.0,7188.4 5740.0,7929.2 5740.0,7771.2 5740.0,0.0 5436.1,0.0 5440.0,224.0 -0.0,215.1 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0096__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1416.0,8152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5885406,41.7514579]}},{"type":"Feature","properties":{"resourceCoords":[5440.0,224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.5861124,41.7551186]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0097/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0097/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5740.0,6021.1 5740.0,6539.1 4127.6,6534.7 4131.6,6012.3 5740.0,6021.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64988891018322,41.73771269175084]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64997276848761,41.74033806974485]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64479703624308,41.7404314357624]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64471317793868,41.737806057768395]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0098/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0098/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5740.0,8251.2 -0.0,8205.8 -0.0,-0.0 5086.0,0.0 5083.8,223.7 5740.0,230.2 5740.0,8251.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61131983799915,41.73571607473402]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6078501234089,41.735788095922636]}},{"type":"Feature","properties":{"resourceCoords":[5740.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60770813965271,41.73192497685621]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61117785424297,41.7318529556676]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1910 | sanborn01790_075 p99","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"16"}],"created":"2026-09-24T16:41:40Z","modified":"2026-09-24T16:41:40Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0099/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0099/info.json","type":"ImageService2","height":8504,"width":5740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"649.8,2263.6 -0.0,2263.8 -0.0,-0.0 5740.0,0.0 5740.0,8262.6 707.4,8274.3 649.8,2263.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901910E:01790_E_1910-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1664.0,4256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6072054,41.734786]}},{"type":"Feature","properties":{"resourceCoords":[1664.0,8272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6071618,41.7329603]}}]}}]}