{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01820_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Decatur, Illinois | 1892 | mapsnap generated fit (2026-10-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-20"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"27"},{"label":"placed","value":"18"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef 10, georef-snap 7, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p11__2 (tier 1, 39.84672,-88.94178 +/-146m); p12__2 (tier 1, 39.84075,-88.96128 +/-122m); p12__3 (tier 1, 39.84139,-88.96219 +/-100m); p12__4 (tier 1, 39.84616,-88.95778 +/-110m); p12__6 (tier 1, 39.84031,-88.96138 +/-100m); p12__8 (tier 1, 39.83998,-88.96253 +/-100m); p2__4 (tier 1, 39.84645,-88.94636 +/-100m); p8__2 (tier 1, 39.84149,-88.94945 +/-100m); p8__3 (tier 1, 39.84061,-88.94935 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p10","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"80.7,1841.3 47.5,1724.4 37.6,171.7 134.9,58.2 549.6,50.0 549.2,85.4 930.0,85.0 1510.5,88.9 1506.7,670.2 1507.3,1255.8 1506.0,1359.4 1509.0,1714.0 1506.4,1857.4 80.7,1841.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[930.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9573325,39.8424748]}},{"type":"Feature","properties":{"resourceCoords":[1509.0,1714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9558264,39.8394739]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p11 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.35"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3272.0"},{"label":"split_canvas_h","value":"2334.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.4,53.4 42.9,539.3 794.7,566.8 767.2,171.1 817.0,170.9 817.0,144.0 411.1,53.5 411.1,92.8 71.4,53.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94224384144295,39.84684124084686]}},{"type":"Feature","properties":{"resourceCoords":[818.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.9421567674897,39.845405374258945]}},{"type":"Feature","properties":{"resourceCoords":[818.0,583.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94348259275493,39.845357308572595]}},{"type":"Feature","properties":{"resourceCoords":[0.0,583.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94356966670817,39.84679317516051]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p11 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2334.0"},{"label":"split_canvas_w","value":"4332.0"},{"label":"split_canvas_h","value":"5318.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.9,604.5 87.1,928.7 124.3,927.8 48.8,1316.4 23.4,1317.1 39.4,1854.8 901.6,1886.8 1049.3,1816.7 1071.6,1071.5 890.4,629.3 115.9,604.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[866.0,1499.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.94051186980069,39.845088390466145]}},{"type":"Feature","properties":{"resourceCoords":[363.0,1499.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.94172040589756,39.84506967187295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p11 [4]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.51"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4332.0"},{"label":"split_canvas_y","value":"4332.0"},{"label":"split_canvas_w","value":"2120.0"},{"label":"split_canvas_h","value":"1656.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1357.7,1441.6 1435.2,1480.0 1482.0,1470.8 1521.0,1375.4 1553.7,1362.1 1562.1,1108.1 1468.1,1133.6 1390.6,1095.2 1218.5,1100.3 1156.5,1134.0 1121.3,1115.0 1090.2,1296.7 1130.6,1484.2 1227.0,1494.6 1357.7,1441.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1083.0,1083.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95321565536449,39.83823078947879]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1083.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95061588472859,39.83829682134514]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1497.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95054870045331,39.83673773591565]}},{"type":"Feature","properties":{"resourceCoords":[1083.0,1497.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95314847108921,39.8366717040493]}},{"type":"Feature","properties":{"resourceCoords":[1143.0,1403.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9528694,39.8370329]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p11 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.51"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4332.0"},{"label":"split_canvas_y","value":"5988.0"},{"label":"split_canvas_w","value":"2120.0"},{"label":"split_canvas_h","value":"1664.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1130.2,1881.5 1593.5,1884.4 1595.7,1532.2 1110.4,1579.5 1130.2,1881.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0011__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1083.0,1497.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.93724249250168,39.846349954264014]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1497.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.93595592565627,39.84635615690252]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.93594962900276,39.845575367422626]}},{"type":"Feature","properties":{"resourceCoords":[1083.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.93723619584817,39.845569164784116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p12 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3983.6"},{"label":"split_canvas_h","value":"4329.6"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"19.2,762.2 4.9,1080.9 16.5,1048.7 50.0,1043.5 33.5,1018.5 41.0,1018.6 49.0,1018.7 343.9,1022.4 919.2,1025.2 915.9,439.9 919.8,1.0 864.9,1.0 864.9,29.9 42.6,39.6 20.4,393.6 1.0,398.0 1.0,425.9 99.5,427.4 67.2,753.9 19.2,762.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[344.0,431.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9574366,39.8468798]}},{"type":"Feature","properties":{"resourceCoords":[344.0,1022.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9574034,39.8457549]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p12 [5]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3988.0"},{"label":"split_canvas_y","value":"4776.0"},{"label":"split_canvas_w","value":"2464.0"},{"label":"split_canvas_h","value":"1665.2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1593.3,1569.1 1584.1,1204.9 1025.2,1218.6 1034.2,1603.8 1593.3,1569.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__5/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1037.9,1328.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9619588,39.8412713]}},{"type":"Feature","properties":{"resourceCoords":[1566.1,1328.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9619415,39.8402512]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__7/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p12 [7]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2505.6"},{"label":"split_canvas_y","value":"5915.2"},{"label":"split_canvas_w","value":"1506.0"},{"label":"split_canvas_h","value":"1736.8"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__7/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"641.9,1856.2 650.4,1893.4 750.5,1909.8 987.2,1907.2 1001.9,1861.0 1001.5,1794.4 1001.5,1786.5 671.1,1754.8 669.9,1856.1 641.9,1856.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0012__7/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[626.4,1478.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95737330594545,39.84697056151389]}},{"type":"Feature","properties":{"resourceCoords":[1002.9,1478.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95735559080862,39.846262376049346]}},{"type":"Feature","properties":{"resourceCoords":[1002.9,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95841244465016,39.84624657185349]}},{"type":"Feature","properties":{"resourceCoords":[626.4,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.958430159787,39.84695475731804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p2 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.74"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2836.8"},{"label":"split_canvas_h","value":"2586.8"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.3,606.3 705.4,575.8 705.6,540.1 684.4,541.8 681.8,83.5 189.2,13.7 185.2,1.0 129.3,1.0 127.2,267.2 141.1,570.7 141.3,606.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94607841845782,39.846269022223815]}},{"type":"Feature","properties":{"resourceCoords":[709.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94603383215212,39.84493371653742]}},{"type":"Feature","properties":{"resourceCoords":[709.2,646.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94762102002579,39.84490247949251]}},{"type":"Feature","properties":{"resourceCoords":[0.0,646.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94766560633148,39.84623778517891]}},{"type":"Feature","properties":{"resourceCoords":[141.1,570.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9474703,39.8459759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p2 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.73"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"126.0,1811.0 423.2,1804.3 726.4,1786.0 993.4,1784.2 994.2,1839.8 1045.2,1823.4 1111.8,1616.7 1227.7,1489.2 1549.9,1457.0 1601.8,642.1 1534.0,298.0 1564.2,155.2 1278.3,130.7 1213.0,504.1 1213.0,517.0 1210.7,517.0 1209.6,523.3 766.1,525.6 704.9,644.8 704.9,646.7 703.9,646.7 700.3,653.7 221.2,641.3 172.0,681.4 138.8,678.5 134.6,711.9 150.4,699.1 90.3,1236.8 122.0,1236.4 126.0,1811.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[422.0,1232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9474886,39.8470551]}},{"type":"Feature","properties":{"resourceCoords":[126.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9482001,39.8459571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p2 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.80"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2823.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2028.8"},{"label":"split_canvas_h","value":"2068.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"716.6,384.6 772.6,422.2 727.3,499.6 1198.8,514.7 1186.5,227.7 1207.9,6.3 1172.2,5.2 1163.4,55.0 1100.7,2.9 721.6,5.1 716.6,384.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0002__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[705.8,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94807188467381,39.850399426373116]}},{"type":"Feature","properties":{"resourceCoords":[1213.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94682590784186,39.85042991308479]}},{"type":"Feature","properties":{"resourceCoords":[1213.0,517.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94678549429132,39.84945638786876]}},{"type":"Feature","properties":{"resourceCoords":[705.8,517.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94803147112327,39.84942590115709]}},{"type":"Feature","properties":{"resourceCoords":[1187.0,427.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9468563,39.8496243]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"794.3,1810.5 128.3,1822.5 128.1,1238.2 109.0,1238.4 90.6,606.3 97.3,606.2 39.1,246.5 89.8,53.9 1094.2,37.3 1461.7,87.8 1476.9,44.8 1575.5,176.7 1587.2,689.9 1603.2,677.1 1538.0,1219.6 1569.9,1219.4 1569.0,1799.6 794.3,1810.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1549.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.94827617792227,39.84703681002061]}},{"type":"Feature","properties":{"resourceCoords":[1549.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.94824824145468,39.845935052986256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1598.5,659.7 1599.2,1194.6 1598.8,1797.1 1006.4,1803.4 560.9,1801.8 561.2,1857.4 275.6,1858.8 83.8,1747.8 61.6,154.3 17.3,142.7 374.6,84.2 374.6,90.9 1002.6,71.4 1002.5,52.5 1582.9,51.1 1598.5,659.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1008.0,1181.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9544940634993,39.84690519949621]}},{"type":"Feature","properties":{"resourceCoords":[105.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9560606399003,39.84858188506074]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p5","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.1,61.9 96.9,111.3 45.4,223.9 55.8,1754.8 1.0,1756.5 1.0,1791.1 372.0,1787.0 939.2,1785.2 1511.9,1780.0 1507.8,1273.0 1517.2,1226.4 1519.8,677.6 1544.2,589.9 1542.0,62.8 947.0,63.0 371.6,63.8 76.6,62.0 61.1,61.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[947.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.955977,39.8457744]}},{"type":"Feature","properties":{"resourceCoords":[372.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9573325,39.8424748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"927.2,1795.7 680.1,1796.5 633.8,1795.6 632.7,1861.2 35.7,1859.5 36.0,1810.1 38.3,1297.2 48.4,1250.2 57.9,695.1 83.7,606.6 88.1,73.4 622.5,78.7 1230.5,70.0 1527.8,67.4 1559.6,651.1 1568.0,651.1 1581.1,1238.5 1609.9,1238.5 1610.9,1498.5 1606.3,1796.0 927.2,1795.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1575.0,1256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.95077535931452,39.843649514826]}},{"type":"Feature","properties":{"resourceCoords":[1575.0,1802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.95073678111424,39.84262241499687]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"102.3,693.0 74.5,103.0 442.0,102.5 1219.0,104.4 1484.0,105.1 1509.0,676.0 1545.1,676.6 1576.8,1141.7 1516.5,1806.2 1277.9,1790.4 1013.2,1866.0 574.1,1855.7 141.1,1850.2 147.9,1549.6 148.8,1286.9 119.7,1286.7 110.8,693.1 102.3,693.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1491.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.94754213092143,39.846004059376114]}},{"type":"Feature","properties":{"resourceCoords":[155.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9506281842541,39.842666358924525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p8 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.91"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.6,1260.3 985.0,1335.7 988.0,1335.7 988.0,1363.8 1035.4,1817.0 1148.3,1877.6 1520.6,1881.3 1564.8,1839.6 1597.1,1224.5 1451.0,833.5 1435.8,618.1 1564.4,385.5 1572.8,99.2 1600.5,91.1 1166.4,83.8 738.4,81.3 60.0,80.7 37.3,80.8 44.4,662.6 36.8,662.7 40.6,1251.3 71.6,1260.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95247749202679,39.842747788217245]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94852095285839,39.84283661339641]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.94838373637415,39.83923409274341]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.95234027554255,39.83914526756425]}},{"type":"Feature","properties":{"resourceCoords":[355.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9516009,39.8426148]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Decatur, Illinois | 1892 | sanborn01820_002 p9","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T03:27:18Z","modified":"2026-10-20T03:27:18Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"708.1,86.5 707.5,136.2 1308.3,140.4 1309.7,74.4 1356.3,75.5 1582.1,75.8 1587.0,662.0 1579.3,662.0 1580.9,1255.1 1612.0,1255.0 1612.0,1264.3 1582.0,1261.7 1562.0,1867.3 109.0,1841.1 112.5,1698.5 112.0,1345.8 114.0,1242.8 117.3,660.2 125.0,82.0 708.1,86.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104dm:g018201892:01820_1892-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[703.0,666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9544724,39.8414402]}},{"type":"Feature","properties":{"resourceCoords":[125.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.9559264,39.8424959]}}]}}]}