{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01802_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Collinsville, Illinois | 1907 | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021907:01802_1907-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Collinsville, Illinois | 1907 | sanborn01802_003 p1 [1]","metadata":[{"label":"streets","value":"66"},{"label":"intersections","value":"78"},{"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":"4936.9"}],"created":"2026-09-23T01:07:35Z","modified":"2026-09-23T01:07:35Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021907:01802_1907-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021907:01802_1907-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,4352.1 226.2,4352.1 3113.0,4380.7 3121.6,4934.0 6878.4,4936.9 6878.4,0.0 0.0,-0.0 -0.0,2252.0 0.0,4352.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021907:01802_1907-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[759.3,2662.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.998149,38.666684]}},{"type":"Feature","properties":{"resourceCoords":[3704.8,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.972171,38.686722]}}]}}]}