{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01802_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Collinsville, Illinois | 1915 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Collinsville, Illinois | 1915 | sanborn01802_004 p1","metadata":[{"label":"streets","value":"83"},{"label":"intersections","value":"123"}],"created":"2026-09-22T18:36:57Z","modified":"2026-09-22T18:36:57Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 0.0,0.0 6452.0,0.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[768.2,2821.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.998612,38.668956]}},{"type":"Feature","properties":{"resourceCoords":[2834.9,1418.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.9800417,38.6787189]}}]}}]}