{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07545_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Braddock, Pennsylvania | 1901 | 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:gmd382m:g3824m:g3824bm:g3824bm_g075451901:07545_1901-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Braddock, Pennsylvania | 1901 | sanborn07545_004 p1 [2]","metadata":[{"label":"streets","value":"57"},{"label":"intersections","value":"113"},{"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":"2026-09-23T01:05:26Z","modified":"2026-09-23T01:05:26Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075451901:07545_1901-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075451901:07545_1901-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5069.0,8074.1 6878.4,8074.1 6878.4,0.0 0.0,0.0 0.0,5933.1 2004.8,5927.5 2029.1,8074.1 5069.0,8074.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824bm:g3824bm_g075451901:07545_1901-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1424.7,2272.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-79.8739819,40.4043774]}},{"type":"Feature","properties":{"resourceCoords":[2090.2,3668.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-79.8587073,40.4004216]}}]}}]}