{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01763_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Canton, Illinois | 1896 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017631896:01763_1896-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Canton, Illinois | 1896 | sanborn01763_003 p1 [2]","metadata":[{"label":"streets","value":"26"},{"label":"intersections","value":"107"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"8074.1"}],"created":"2026-09-23T03:59:47Z","modified":"2026-09-23T03:59:47Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017631896:01763_1896-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017631896:01763_1896-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,1913 1613,0.0 0.0,0.0 0.0,292.1 56.6,292.1 635.9,293.5 638.1,1913 1613,1913\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017631896:01763_1896-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1148.8,760.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.033555,40.553349]}},{"type":"Feature","properties":{"resourceCoords":[1193.6,584.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.032772,40.5557639]}}]}}]}