{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07523_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Bellwood, Pennsylvania | 1910 | 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:gmd382m:g3824m:g3824bm:g3824bm_g075231910:07523_1910-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bellwood, Pennsylvania | 1910 | sanborn07523_004 p1 [2]","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"50"},{"label":"split_canvas_x","value":"3666.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3212.4"},{"label":"split_canvas_h","value":"8074.1"}],"created":"2026-09-22T20:43:57Z","modified":"2026-09-22T20:43:57Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075231910:07523_1910-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075231910:07523_1910-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,8074.1 6878.4,0.0 3666.0,0.0 3679.6,4527.8 3710.2,4926.7 4474.3,4881.3 4517.4,5455.0 3755.4,5518.8 3934.4,8074.1 6878.4,8074.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075231910:07523_1910-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5222.7,1785.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.340308,40.6071151]}},{"type":"Feature","properties":{"resourceCoords":[5380.6,6735.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.3216145,40.5989438]}}]}}]}