{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01778_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Champaign, Illinois | 1897 | 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:g017781897:01778_1897-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Champaign, Illinois | 1897 | sanborn01778_003 p1 [1]","metadata":[{"label":"streets","value":"46"},{"label":"intersections","value":"138"},{"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":"2026-09-23T05:07:58Z","modified":"2026-09-23T05:07:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017781897:01778_1897-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017781897:01778_1897-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1251.8,1913 1249.3,998.3 1613,997.2 1613,0.0 0.0,-0.0 0.0,1282.7 838.8,1282.7 839.4,1913 1251.8,1913\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017781897:01778_1897-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[220.2,701.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.248484,40.119205]}},{"type":"Feature","properties":{"resourceCoords":[488.4,896.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.2435226,40.1163037]}}]}}]}