{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07508_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Avoca, Pennsylvania | 1913 | 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:g3824am:g3824am_g075081913:07508_1913-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p1 [2]","metadata":[{"label":"streets","value":"29"},{"label":"intersections","value":"32"},{"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":"5265.1"}],"created":"2026-09-22T06:35:25Z","modified":"2026-09-22T06:35:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,3397.7 6878.4,3134.3 6878.4,0.0 0.0,0.0 0.0,5265.1 6878.4,5224.4 6878.4,3397.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2657.5,1580.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7375816,41.3420791]}},{"type":"Feature","properties":{"resourceCoords":[2043.3,806.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7389148,41.3466558]}}]}}]}