{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07604_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Coraopolis, Pennsylvania | 1911 | 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:gmd382m:g3824m:g3824cm:g3824cm_g076041911:07604_1911-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Coraopolis, Pennsylvania | 1911 | sanborn07604_004 p1","metadata":[{"label":"streets","value":"31"},{"label":"intersections","value":"107"}],"created":"2026-09-23T03:46:07Z","modified":"2026-09-23T03:46:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g076041911:07604_1911-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g076041911:07604_1911-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 -0.0,1913.0 0.0,0.0 1613.0,-0.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g076041911:07604_1911-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[797.0,786.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1597234,40.5140159]}},{"type":"Feature","properties":{"resourceCoords":[458.6,725.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1703045,40.5198128]}}]}}]}