{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01790_078.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chicago, Illinois | 1911 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"119"},{"label":"placed","value":"93"},{"label":"unplaced","value":"26"},{"label":"fit sources","value":"georef 71, georef-snap 20, georef-street 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 14 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 41.68756,-87.62676 +/-4762m); p101__1 (tier 1, 41.68525,-87.60823 +/-263m); p101__2 (tier 1, 41.68539,-87.61160 +/-100m); p102 (tier 3, 41.68008,-87.60888 +/-579m); p103 (tier 2, 41.68552,-87.60599 +/-100m); p104 (tier 4, 41.68756,-87.62676 +/-4762m); p105__1 (tier 3, 41.67768,-87.60572 +/-579m); p105__2 (tier 3, 41.67768,-87.60572 +/-579m); p105__3 (tier 3, 41.67768,-87.60572 +/-579m); p106 (tier 3, 41.67507,-87.60909 +/-579m); p108 (tier 1, 41.65182,-87.61479 +/-263m); p52__2 (tier 1, 41.68082,-87.64433 +/-187m); p53__1 (tier 1, 41.69202,-87.63457 +/-100m); p53__3 (tier 1, 41.69386,-87.63508 +/-156m); p68 (tier 2, 41.67554,-87.65278 +/-228m); p83 (tier 3, 41.71791,-87.60905 +/-579m); p87 (tier 3, 41.70962,-87.60081 +/-579m); p88 (tier 3, 41.70967,-87.59748 +/-579m); p89 (tier 1, 41.70425,-87.60235 +/-257m); p90 (tier 2, 41.70104,-87.60241 +/-100m); p92 (tier 2, 41.70002,-87.60528 +/-100m); p93 (tier 2, 41.69469,-87.60698 +/-215m); p94 (tier 2, 41.69279,-87.60552 +/-100m); p95 (tier 2, 41.69279,-87.60464 +/-100m); p96__1 (tier 2, 41.69450,-87.60442 +/-1119m); p96__2 (tier 2, 41.69450,-87.60442 +/-1119m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p1","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0001/info.json","type":"ImageService2","height":8508,"width":5744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5744.0,0.0 5744.0,8262.8 -0.0,8268.5 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4584.0,8264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6392365,41.7087891]}},{"type":"Feature","properties":{"resourceCoords":[4584.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6393314,41.7124338]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p10","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"14"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0010/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,309.7 5716.0,319.2 5716.0,8504.0 -0.0,8504.0 -0.0,309.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3820.0,4224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6304431,41.6979613]}},{"type":"Feature","properties":{"resourceCoords":[1808.0,4224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6304677,41.6988825]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0100/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0100/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,8504.0 487.7,8435.4 478.1,206.2 4188.5,235.7 4189.9,0.0 5728.0,0.0 5728.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60847203107105,41.68925750804648]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60498671707745,41.689318972005324]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60486537973526,41.685427548964434]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60835069372885,41.68536608500559]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p107","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0107/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0107/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.4,8504.0 -0.0,8504.0 -0.0,-0.0 5728.0,0.0 5728.0,8504.0 1436.4,8492.8 1436.4,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1460.0,4156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6172334,41.6518163]}},{"type":"Feature","properties":{"resourceCoords":[4076.0,4156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6156215,41.651823]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p109","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0109/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0109/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"16.7,8504.0 -0.0,0.0 5728.0,-0.0 5728.0,8504.0 16.7,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0109/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61211687522534,41.64969464430728]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61223065150092,41.64705668759274]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6174351144766,41.64718379882805]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61732133820102,41.6498217555426]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p11","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0011/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5064.4,374.1 5111.8,8504.0 290.7,8504.0 253.9,388.0 5064.4,374.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2384.0,4344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6303945,41.696141]}},{"type":"Feature","properties":{"resourceCoords":[4396.0,376.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6279796,41.6952614]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p110","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0110/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0110/info.json","type":"ImageService2","height":8504,"width":5676},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5676.0,-0.0 5676.0,8504.0 -0.0,8504.0 -0.0,0.0 5676.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[68.0,8284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6172265,41.6470452]}},{"type":"Feature","properties":{"resourceCoords":[5304.0,8284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6172309,41.6445879]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p12","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0012/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,272.0 5414.0,287.9 5369.4,8504.0 -0.0,8504.0 -0.0,272.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3356.0,4248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6303216,41.6934146]}},{"type":"Feature","properties":{"resourceCoords":[1360.0,276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6279573,41.6943491]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p13","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"24"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0013/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5629.7,364.3 5567.6,8206.9 -0.0,8176.9 -0.0,374.7 5629.7,364.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1336.0,8184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6282535,41.7061898]}},{"type":"Feature","properties":{"resourceCoords":[5420.0,364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6234414,41.7044236]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p14","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0014/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5198.6,391.7 5215.9,8227.5 -0.0,8241.2 -0.0,413.0 5198.6,391.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1772.0,6256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6269782,41.7034791]}},{"type":"Feature","properties":{"resourceCoords":[1772.0,2344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6245964,41.7035084]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0015/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5266.5,360.8 5268.8,8223.6 4743.6,8223.4 4705.6,8223.4 -0.0,8224.6 -0.0,375.2 5266.5,360.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2592.0,4284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6257196,41.7007558]}},{"type":"Feature","properties":{"resourceCoords":[2592.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6281142,41.7007224]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"16"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0016/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,356.3 5376.3,349.5 5353.7,8244.8 -0.0,8241.1 -0.0,356.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3352.0,4288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6256492,41.6980248]}},{"type":"Feature","properties":{"resourceCoords":[3352.0,352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6232637,41.6980586]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p17","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"20"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0017/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0017/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5716.0,308.9 5716.0,8241.9 422.8,8285.4 374.8,363.3 5716.0,308.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2432.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6256021,41.6961969]}},{"type":"Feature","properties":{"resourceCoords":[4424.0,320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6231893,41.6953165]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0018/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0018/info.json","type":"ImageService2","height":8504,"width":5716},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"448.1,8261.8 485.8,358.9 5197.8,332.5 5207.3,8244.5 448.1,8261.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6229602426018,41.694957774835046]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62290904086076,41.692351467094895]}},{"type":"Feature","properties":{"resourceCoords":[5716.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62806547859086,41.69229418449676]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6281166803319,41.69490049223691]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0019/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0019/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,8225.4 5115.6,8224.1 5122.4,8504.0 -0.0,8504.0 -0.0,0.0 5712.0,-0.0 5712.0,8225.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61861035045962,41.71466362513567]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61855372989008,41.7120165418604]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62379611139849,41.71195317191687]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62385273196803,41.71460025519214]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0002/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5704.0,0.0 5704.0,8256.2 303.5,8255.9 311.5,0.0 5704.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3120.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6368139,41.708826]}},{"type":"Feature","properties":{"resourceCoords":[1124.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6380281,41.7088075]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p20","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0020/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,8146.7 604.5,8162.9 804.5,-0.0 5724.0,-0.0 5724.0,2282.1 5440.6,2263.1 5340.7,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6186451,41.7123831]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6185025,41.7097688]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62370550000001,41.7096107]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6238481,41.712225]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p21","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"19"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0021/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1259.9,8224.2 1256.7,8504.0 -0.0,8504.0 384.5,8424.5 -0.0,8430.7 -0.0,2168.1 284.6,2182.5 249.7,-0.0 5724.0,-0.0 5724.0,8285.0 1259.9,8224.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3768.0,8256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6235517,41.7080715]}},{"type":"Feature","properties":{"resourceCoords":[1784.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.618691,41.7090653]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p22","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"29"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0022/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5363.0,8224.0 492.2,8235.3 471.6,-0.0 5724.0,-0.0 5322.9,85.7 5363.0,8224.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2496.0,6268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6223084,41.7062793]}},{"type":"Feature","properties":{"resourceCoords":[4500.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6234721,41.7053438]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p23","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0023/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0023/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5607.3,8263.3 -0.0,8218.2 -0.0,-0.0 5724.0,-0.0 5607.3,8263.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3312.0,6280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6222278,41.7034818]}},{"type":"Feature","properties":{"resourceCoords":[3308.0,200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6185527,41.7035653]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0024/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5625.2,-0.0 5596.3,8214.2 -0.0,8201.7 66.9,-0.0 5625.2,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61841026333154,41.702507679295245]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61832819445415,41.699897011939875]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62348663695195,41.69980533529928]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62356870582934,41.70241600265465]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p25","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0025/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"988.5,8320.6 985.1,453.5 5724.0,451.4 5724.0,8318.9 988.5,8320.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2920.0,8320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6220173,41.6962453]}},{"type":"Feature","properties":{"resourceCoords":[2916.0,4368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6220683,41.6980735]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p26","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0026/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1718.1,8337.6 1762.0,372.7 5106.6,389.6 5107.3,0.0 5724.0,0.0 5724.0,8504.0 5524.5,8504.0 5525.5,8357.2 1718.1,8337.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4900.0,4368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6183944,41.698122]}},{"type":"Feature","properties":{"resourceCoords":[852.0,368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6209335,41.6999027]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p27","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"20"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0027/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0027/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4315.3,7196.3 4303.2,8262.0 928.2,8255.4 928.0,296.0 4868.0,296.1 4774.9,5027.7 4315.3,7196.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[928.0,4284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6231646,41.6944026]}},{"type":"Feature","properties":{"resourceCoords":[928.0,296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.623214,41.6962273]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p28","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0028/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0028/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5724.0,8239.9 564.5,8238.5 574.6,7181.3 1026.7,5029.1 1110.6,335.0 5724.0,326.9 5724.0,8239.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5088.0,4344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.618297,41.6944484]}},{"type":"Feature","properties":{"resourceCoords":[5088.0,328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6183427,41.6963007]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0029/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0029/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 0.0,0.0 1932.4,0.0 1931.2,195.9 2116.4,198.2 2824.3,206.8 3012.2,209.2 5724.0,242.5 5724.0,8504.0 4096.2,8504.0 4097.7,8169.4 2114.1,8145.3 2113.3,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63403173919045,41.692534367351904]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63055829655963,41.69260737738898]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63041405876353,41.68872667020872]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63388750139436,41.688653660171646]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0003/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1989.3,0.0 1989.3,314.5 5411.0,311.1 5419.1,8477.6 -0.0,8508.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4552.0,8204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6403604,41.7051309]}},{"type":"Feature","properties":{"resourceCoords":[4552.0,312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.640455,41.7087705]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p30","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"19"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0030/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0030/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2688.4,8193.5 2690.7,8504.0 556.7,8485.9 466.6,199.9 4800.3,204.5 4855.7,8192.0 2688.4,8193.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[876.0,4184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6302637,41.6906868]}},{"type":"Feature","properties":{"resourceCoords":[4836.0,4184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.62785,41.6907172]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p31","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"20"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0031/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0031/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1299.7,8185.4 1289.3,197.9 5724.0,293.5 5724.0,8194.6 1299.7,8185.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4724.0,6200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6257374,41.6898319]}},{"type":"Feature","properties":{"resourceCoords":[1304.0,2184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6278765,41.6916243]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p32","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"24"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0032/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0032/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1688.8,8195.1 1639.3,300.5 5072.6,233.9 5126.7,8504.0 683.3,8504.0 680.5,8194.6 1688.8,8195.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[664.0,4208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6257653,41.6907429]}},{"type":"Feature","properties":{"resourceCoords":[5112.0,6200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6230322,41.6898685]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p33","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"24"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0033/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0033/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4662.5,339.3 4545.9,8212.4 1311.5,8193.4 1312.0,324.0 4662.5,339.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1312.0,6220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6230322,41.6898685]}},{"type":"Feature","properties":{"resourceCoords":[1312.0,324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6231153,41.6925855]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p34","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0034/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0034/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5724.0,8207.7 433.7,8206.8 500.2,288.8 5724.0,280.0 5724.0,8207.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.621357,41.6927423]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.617844,41.6927855]}},{"type":"Feature","properties":{"resourceCoords":[5724.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6177583,41.6888881]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6212713,41.6888449]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p35","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"18"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0035/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.3,7966.6 170.0,262.0 4975.4,282.2 4898.9,7985.4 179.3,7966.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2160.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6276783,41.6852649]}},{"type":"Feature","properties":{"resourceCoords":[2160.0,276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6277968,41.6888934]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p36","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"30"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0036/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0036/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8237.4 -0.0,275.2 587.9,271.8 591.3,580.5 5025.2,572.7 5088.9,8222.1 -0.0,8237.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6256535,41.6871013]}},{"type":"Feature","properties":{"resourceCoords":[5056.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6229489,41.6871305]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p37","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"27"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0037/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1195.1,8178.0 1192.0,228.0 4454.7,245.7 4610.5,8211.4 1195.1,8178.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1192.0,6200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6229229,41.6862309]}},{"type":"Feature","properties":{"resourceCoords":[1192.0,228.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6230047,41.6889591]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0038/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0038/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5016.0,232.0 5079.0,8243.7 552.9,8230.8 341.2,232.4 5016.0,232.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,6240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6208425,41.6862525]}},{"type":"Feature","properties":{"resourceCoords":[5016.0,232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6181602,41.6890175]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p39","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0039/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4444.8,8299.5 416.1,8260.0 424.0,248.0 1078.9,249.9 1080.9,0.0 5724.0,0.0 5724.0,7220.0 4455.6,7204.5 4444.8,8299.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2468.0,8280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6167962,41.6853866]}},{"type":"Feature","properties":{"resourceCoords":[424.0,248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6181602,41.6890175]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p4","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0004/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,188.1 5129.6,188.0 5159.9,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3128.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6380281,41.7088075]}},{"type":"Feature","properties":{"resourceCoords":[1136.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6392365,41.7087891]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p40","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0040/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"787.8,6933.3 87.8,6896.1 369.5,0.0 5724.0,0.0 5724.0,384.0 5523.8,429.8 5724.0,475.4 5724.0,8504.0 4823.9,8504.0 4865.9,8255.5 741.0,7979.2 787.8,6933.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6168.0,4284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6110875,41.6873272]}},{"type":"Feature","properties":{"resourceCoords":[1080.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6144748,41.6890746]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p41","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0041/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0041/info.json","type":"ImageService2","height":8504,"width":5724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,766.2 167.1,764.4 164.2,425.5 2025.5,427.5 2027.5,743.6 5565.5,743.9 5563.3,451.4 5724.0,450.9 5724.0,7963.0 -0.0,7966.0 -0.0,766.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2048.0,4200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6313506,41.6870363]}},{"type":"Feature","properties":{"resourceCoords":[3912.0,4200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6301448,41.6870516]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p42","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"27"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0042/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0042/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1837.2,7361.0 -0.0,7431.7 -0.0,-0.0 5728.0,0.0 5728.0,8236.8 1837.6,8210.9 1837.2,7361.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3808.0,4232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6360539,41.6833434]}},{"type":"Feature","properties":{"resourceCoords":[3808.0,8224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6359981,41.6815209]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p43","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0043/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4130.7,0.0 4129.1,265.0 5728.0,274.0 5728.0,8299.8 334.7,8261.6 338.1,0.0 4130.7,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2372.0,8276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6335874,41.6815501]}},{"type":"Feature","properties":{"resourceCoords":[2372.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6337007,41.6851857]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p44","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0044/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5319.8,309.6 5368.2,8300.4 821.3,8295.2 774.1,310.1 5319.8,309.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5344.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6288328,41.6834328]}},{"type":"Feature","properties":{"resourceCoords":[1436.0,8296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6311749,41.6815792]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p45","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0045/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"418.4,8227.9 393.5,0.0 5120.0,0.0 5118.4,257.9 4950.8,257.4 4910.0,8274.7 418.4,8227.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2384.0,4232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6276251,41.6834489]}},{"type":"Feature","properties":{"resourceCoords":[4304.0,8276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6264023,41.6816225]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p46","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0046/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8243.8 -0.0,247.4 5728.0,237.3 5728.0,8307.8 5323.4,8309.8 5325.2,8504.0 -0.0,8504.0 -0.0,8248.1 -0.0,8243.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1328.0,8248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6252191,41.6816361]}},{"type":"Feature","properties":{"resourceCoords":[5248.0,236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6228939,41.6853273]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p47","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0047/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4163.6,8460.1 4162.2,8226.4 1052.9,8231.4 1078.3,155.2 5057.2,178.4 5020.8,8471.3 4163.6,8460.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2416.0,6260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6217126,41.6825518]}},{"type":"Feature","properties":{"resourceCoords":[648.0,8232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6227721,41.6816358]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0048/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5514.0,126.1 5594.7,8504.0 3561.7,8504.0 3492.1,8504.0 -0.0,8368.3 -0.0,121.1 5514.0,126.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62016626194821,41.685408683039334]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61666655022728,41.68544594809567]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61659298940472,41.68153818738846]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62009270112566,41.68150092233213]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0049/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1340.4,8278.9 1353.4,6296.2 262.8,6289.3 280.5,4284.9 1366.2,4285.2 1463.9,-0.0 4544.5,-0.0 4453.2,8291.2 1340.4,8278.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61178528054717,41.68607779623886]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61171264734674,41.683461521403146]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61687724645375,41.68338042111197]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61694987965419,41.685996695947686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0005/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,218.1 2581.0,228.2 2581.8,0.0 5704.0,0.0 5704.0,8233.8 5196.9,8230.9 5195.4,8508.0 -0.0,8508.0 -0.0,218.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6368165695264,41.70892581079324]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63334414519052,41.70898873933198]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63321929790467,41.70509472754444]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63669172224056,41.7050317990057]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p50","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0050/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"320.0,8352.0 387.5,171.9 -0.0,172.9 -0.0,0.0 5728.0,-0.0 5728.0,2115.0 4175.1,2115.9 4175.4,2606.4 5728.0,2911.9 5728.0,8301.1 320.0,8352.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3320.0,8352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6167306,41.6825854]}},{"type":"Feature","properties":{"resourceCoords":[320.0,8352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6167642,41.6839647]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p51","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0051/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1428.5,8297.2 1437.7,6256.9 1495.6,6256.5 1569.8,806.0 -0.0,496.0 -0.0,0.0 5728.0,-0.0 5728.0,7563.8 4967.3,7560.5 4968.0,8288.0 1428.5,8297.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1828.0,3008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6146922,41.6813876]}},{"type":"Feature","properties":{"resourceCoords":[4968.0,8288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6178705,41.6799149]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0052__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 | 1911 | sanborn01790_078 p52 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4452.0"},{"label":"split_canvas_w","value":"5712.0"},{"label":"split_canvas_h","value":"4052.0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0052__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0052/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,6806.8 5712.0,6654.8 5712.0,6424.0 5712.0,4458.0 3211.3,4455.4 3217.1,5401.9 -0.0,5421.0 -0.0,8504.0 5712.0,8428.1 5712.0,6806.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0052__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1312.0,8428.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.646597,41.6722866]}},{"type":"Feature","properties":{"resourceCoords":[5232.0,8428.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6441561,41.6723221]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0053__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 | 1911 | sanborn01790_078 p53 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"2351.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3360.8"},{"label":"split_canvas_h","value":"8504.0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0053__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0053/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2555.8,7242.4 2555.7,8004.7 2733.2,8202.5 5712.0,8211.6 5712.0,240.3 5337.8,237.6 5338.2,27.2 2431.2,0.7 2405.2,2837.2 2363.2,7243.8 2555.8,7242.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0053__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4525.1,8208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6455698,41.6777618]}},{"type":"Feature","properties":{"resourceCoords":[4525.1,232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6456835,41.681402]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p54","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0054/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0054/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5300.3,8184.4 392.3,8172.8 374.2,212.0 190.0,211.1 -0.0,210.2 -0.0,-0.0 5068.7,0.0 5091.8,4187.2 5293.0,4130.6 5300.3,8184.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2520.0,8176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6435403,41.6777918]}},{"type":"Feature","properties":{"resourceCoords":[1160.0,216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6444763,41.6814166]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0055/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0055/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"725.6,8381.0 737.1,4504.1 543.0,4557.3 539.9,552.7 -0.0,550.0 -0.0,-0.0 5712.0,0.0 5712.0,8436.8 725.6,8381.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64243937648415,41.6818103381565]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63881062842432,41.68188124456294]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63867027587305,41.677817821077426]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64229902393288,41.67774691467099]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0056/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0056/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"990.7,0.0 3538.9,0.0 3536.8,761.8 5461.0,781.2 5436.1,8504.0 989.0,8461.8 990.7,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63942905685133,41.68182137173811]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63585380517962,41.68189176368238]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63571447087217,41.67788824719434]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63928972254388,41.67781785525007]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p57","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0057/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5592.5,615.8 5643.5,7927.0 225.3,7920.0 174.9,617.6 5592.5,615.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[200.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6359426,41.6796984]}},{"type":"Feature","properties":{"resourceCoords":[5616.0,4272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6323244,41.6797413]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0058/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,8253.9 226.7,8204.7 232.0,240.0 5712.0,280.3 5712.0,8253.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4148.0,8240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6298646,41.6779446]}},{"type":"Feature","properties":{"resourceCoords":[232.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6323802,41.6815647]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p59","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0059/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0059/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1147.7,8286.7 1110.5,279.0 5398.1,322.2 5437.7,8306.0 1147.7,8286.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3496.0,4288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.627518,41.6797982]}},{"type":"Feature","properties":{"resourceCoords":[1512.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6287756,41.6816083]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p6","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"16"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0006/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4514.1,8191.2 4514.8,8508.0 -0.0,8508.0 -0.0,364.9 5126.4,364.9 5212.1,8147.0 4514.1,8191.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[496.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6259611,41.7089647]}},{"type":"Feature","properties":{"resourceCoords":[496.0,368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6235679,41.7089886]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p60","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0060/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"875.3,317.0 872.9,572.7 5712.0,617.8 5712.0,4314.9 5712.0,8305.6 4513.0,8298.4 4512.3,8132.8 4128.9,8127.1 4126.3,8296.2 265.3,8263.8 271.5,311.5 875.3,317.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2200.0,4284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6251595,41.6798263]}},{"type":"Feature","properties":{"resourceCoords":[2200.0,8280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6250992,41.6779976]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p61","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"19"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0061/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0061/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1199.1,8196.0 1229.8,507.7 1711.2,514.1 1712.0,320.0 5220.9,350.1 5176.0,8232.0 1199.1,8196.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5176.0,8232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6205113,41.6780611]}},{"type":"Feature","properties":{"resourceCoords":[1712.0,320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6227721,41.6816358]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p62","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"20"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0062/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"601.6,8504.0 535.3,568.3 3876.1,597.2 4039.6,680.1 4961.6,713.6 4986.1,4246.5 5712.0,4242.6 5712.0,8233.3 5011.9,8235.9 5013.6,8504.0 601.6,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[596.0,6260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6205326,41.6789688]}},{"type":"Feature","properties":{"resourceCoords":[4972.0,2408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6178953,41.6807523]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p63","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0063/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4875.5,8048.9 4074.5,8060.8 4080.7,8504.0 716.4,8442.2 912.1,8262.1 849.0,365.4 4832.1,313.6 4875.5,8048.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4840.0,4404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.644281,41.6759726]}},{"type":"Feature","properties":{"resourceCoords":[896.0,6468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6455698,41.6777618]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p64","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0064/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"936.3,331.8 4616.2,218.0 4667.1,4846.3 4884.9,4844.0 4894.6,6410.8 951.7,6459.1 936.3,331.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[936.0,4424.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.644281,41.6759726]}},{"type":"Feature","properties":{"resourceCoords":[936.0,432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6418421,41.6759969]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0065/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0065/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,7346.5 5712.0,8398.4 117.2,8252.2 -0.0,8504.0 -0.0,707.0 4105.1,837.4 4072.5,7339.2 5712.0,7346.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64635763637698,41.678191314710155]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64625229674598,41.675572987963584]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65143479702824,41.67545502480142]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65154013665924,41.678073351547994]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p66","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0066/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,8504.0 -0.0,8504.0 -0.0,0.0 5712.0,-0.0 5712.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[868.0,8296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6565246,41.6776057]}},{"type":"Feature","properties":{"resourceCoords":[4808.0,8296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6565146,41.6757823]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p67","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0067/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1604.5 800.0,1604.0 807.1,-0.0 5712.0,-0.0 5712.0,8504.0 -0.0,8504.0 -0.0,1604.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64553685773802,41.67632178940334]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6454474778966,41.6737121053827]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6506657764264,41.67361302933104]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.65075515626782,41.67622271335168]}},{"type":"Feature","properties":{"resourceCoords":[800.0,1604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6465086,41.6759376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p69","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0069/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0069/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4914.9,8504.0 607.3,8504.0 478.6,332.3 4888.5,358.7 4914.9,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4320.0,4336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6394422,41.6760227]}},{"type":"Feature","properties":{"resourceCoords":[2352.0,344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6406949,41.6778268]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0007/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,637.1 1721.7,641.7 1721.9,330.4 1897.8,293.0 5644.8,279.1 5654.6,8334.4 -0.0,8379.2 -0.0,637.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6281140907237,41.707918110949855]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62805693629747,41.705260009178836]}},{"type":"Feature","properties":{"resourceCoords":[5704.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63333044787824,41.70519591516072]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8508.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63338760230447,41.70785401693174]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p70","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0070/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5325.1,8504.0 -0.0,8504.0 -0.0,335.3 5325.2,383.9 5325.1,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3352.0,4344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6370364,41.6760489]}},{"type":"Feature","properties":{"resourceCoords":[1392.0,348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6382929,41.677853]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p71","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0071/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0071/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"598.1,8504.0 523.8,303.0 5712.0,303.2 5712.0,8504.0 598.1,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4500.0,4292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6334261,41.6760882]}},{"type":"Feature","properties":{"resourceCoords":[560.0,4292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6358294,41.676062]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p72","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0072/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5204.0,300.7 5223.1,8504.0 1260.6,8504.0 1259.1,7901.1 461.8,7897.8 501.4,276.2 5204.0,300.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3232.0,4296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6310148,41.6761144]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6322686,41.6779185]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p73","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0073/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0073/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"359.9,8504.0 363.8,288.1 5712.0,332.6 5712.0,8504.0 359.9,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2344.0,4308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6286062,41.6761406]}},{"type":"Feature","properties":{"resourceCoords":[2344.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6286612,41.6779577]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__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 | 1911 | sanborn01790_078 p74 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4392.0"},{"label":"split_canvas_w","value":"5712.0"},{"label":"split_canvas_h","value":"4112.0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5712.0,8504.0 5712.0,4747.1 5426.8,4748.5 5424.3,4504.6 377.0,4553.4 374.0,4392.7 0.0,4392.8 145.2,8504.0 5712.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5472.0,8384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6204577,41.6762403]}},{"type":"Feature","properties":{"resourceCoords":[2016.0,4544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.622653,41.6780271]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__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 | 1911 | sanborn01790_078 p74 [2]","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":"5712.0"},{"label":"split_canvas_h","value":"4392.8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5193.4,312.1 792.6,312.0 818.5,4392.7 825.0,4392.7 5273.0,4313.7 5193.4,312.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0074__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3236.0,312.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6250992,41.6779976]}},{"type":"Feature","properties":{"resourceCoords":[1320.0,312.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6262861,41.6779832]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p75","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"17"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0075/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0075/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5576.8,6099.8 5712.0,8504.0 -0.0,8504.0 -0.0,516.5 1732.6,497.6 1727.9,232.5 2420.4,222.3 2418.0,0.0 5450.0,0.0 5453.7,177.6 5565.1,176.1 5690.0,6097.9 5576.8,6099.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3792.0,4136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6165379,41.6763032]}},{"type":"Feature","properties":{"resourceCoords":[1832.0,6152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6177426,41.6753715]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p76","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0076/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0076/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.5,8504.0 -0.0,6179.0 113.7,6179.9 112.0,232.0 -0.0,231.2 -0.0,-0.0 5712.0,0.0 5712.0,8504.0 87.5,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[112.0,4176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6153938,41.6763215]}},{"type":"Feature","properties":{"resourceCoords":[112.0,232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6154527,41.6781299]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0077/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0077/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4324.3 982.5,4329.0 1001.0,225.2 -0.0,220.4 -0.0,-0.0 4717.3,0.0 4741.5,518.4 5337.9,520.7 5362.1,8504.0 -0.0,8504.0 -0.0,4324.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64450868263164,41.674267405212255]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64108052690449,41.67432967735835]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64095745157526,41.670495803547276]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.64438560730241,41.67043353140118]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p78","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0078/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0078/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4492.7,678.3 4483.3,8504.0 -0.0,8504.0 -0.0,623.2 4492.7,678.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5064.0,4448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6381213,41.6723957]}},{"type":"Feature","properties":{"resourceCoords":[1152.0,8360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6404644,41.6705493]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p79","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0079/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0079/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5720.0,8309.8 2748.0,8274.9 2746.3,8504.0 -0.0,8504.0 -0.0,571.8 5720.0,653.0 5720.0,8309.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4456.0,4360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6357141,41.6724211]}},{"type":"Feature","properties":{"resourceCoords":[2496.0,8272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.636866,41.6705872]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0008/info.json","type":"ImageService2","height":8504,"width":5712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 8.6,256.3 5439.4,252.8 5442.9,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.62806583316735,41.70529195965203]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6279979221441,41.70253145089927]}},{"type":"Feature","properties":{"resourceCoords":[5712.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63346413744529,41.702455433540706]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63353204846854,41.705215942293464]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0080/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0080/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5651.4,8295.6 5720.0,8504.0 3287.2,8504.0 3286.6,8291.8 584.7,8287.5 505.0,599.3 4324.7,603.5 4325.3,0.0 5115.8,0.0 5184.3,8294.8 5651.4,8295.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63530538027102,41.67442441244316]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63180001029902,41.67446555982937]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63171868608458,41.67054533763072]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63522405605659,41.67050419024451]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p81","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0081/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0081/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5720.0,8504.0 600.0,8376.0 658.5,667.2 4563.5,712.5 4563.4,728.3 5720.0,738.4 5720.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4528.0,4488.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6297032,41.6724846]}},{"type":"Feature","properties":{"resourceCoords":[600.0,8376.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.632049,41.6706379]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0082/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0082/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8504.0 -0.0,314.9 5720.0,339.9 5720.0,8504.0 -0.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63671332982211,41.67073373152257]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63321576016348,41.67078200852776]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.63312035033667,41.66687028608245]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6366179199953,41.66682200907726]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p84","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"20"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0084/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0084/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8317.7 -0.0,-0.0 5720.0,0.0 5720.0,7798.9 5580.7,7800.9 5582.8,8279.3 -0.0,8317.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[352.0,6316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6071442,41.7046781]}},{"type":"Feature","properties":{"resourceCoords":[5536.0,300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6040099,41.7074792]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p85","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0085/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0085/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2261.1,0.0 2234.9,464.0 4785.0,494.9 4746.4,8305.1 5720.0,8309.5 5720.0,8504.0 -0.0,8504.0 -0.0,-0.0 2261.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,8344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6081901,41.7000859]}},{"type":"Feature","properties":{"resourceCoords":[2236.0,464.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6073536,41.7037554]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0086/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0086/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5720.0,0.0 5720.0,8504.0 -0.0,8504.0 -0.0,465.7 3123.3,489.1 3128.0,0.0 5720.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60578172726564,41.70399073401683]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60236306705457,41.70406648311575]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60221328636014,41.70024499939316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60563194657121,41.70016925029424]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p9","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0009/info.json","type":"ImageService2","height":8508,"width":5704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5704.0,264.2 5704.0,8508.0 -0.0,8508.0 -0.0,264.0 5704.0,264.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3816.0,264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6281142,41.7007224]}},{"type":"Feature","properties":{"resourceCoords":[228.0,264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6281607,41.7025451]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p91","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0091/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0091/info.json","type":"ImageService2","height":8504,"width":5720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 963.2,0.0 965.0,794.1 5720.0,783.8 5720.0,8504.0 -0.0,8498.8 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[796.0,4668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6085942,41.6982164]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,632.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6081901,41.7000859]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0097/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0097/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5728.0,0.0 5728.0,8097.2 -0.0,8134.6 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61070275516224,41.69288627494324]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60718414879716,41.69292102102459]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60711555244566,41.68899261848219]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.61063415881074,41.68895787240084]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0098/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0098/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,8504.0 4085.7,8504.0 4078.7,7900.6 2533.1,7918.5 2534.4,8155.4 546.6,8162.7 544.8,0.0 5728.0,0.0 5728.0,8504.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60751364941123,41.69289494576852]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.60404478490382,41.692925953473924]}},{"type":"Feature","properties":{"resourceCoords":[5728.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6039835683813,41.68905312025222]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8504.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-87.6074524328887,41.689022112546816]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago, Illinois | 1911 | sanborn01790_078 p99","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T09:12:30Z","modified":"2026-09-21T09:12:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0099/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0099/info.json","type":"ImageService2","height":8504,"width":5728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5728.0,252.2 5728.0,8504.0 588.2,8504.0 251.3,237.0 5728.0,252.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g017901911G:01790_G_1911-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,4168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6110875,41.6873272]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.6106772,41.6891392]}}]}}]}