{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07660_009.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Erie, Pennsylvania | 1951 | key map | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195101:07660_01_1951-0000__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1951 | sanborn07660_009 p0 [2]","metadata":[{"label":"streets","value":"39"},{"label":"intersections","value":"207"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4792.5"},{"label":"split_canvas_h","value":"5832.0"}],"created":"2026-09-21T21:20:34Z","modified":"2026-09-21T21:20:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195101:07660_01_1951-0000__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195101:07660_01_1951-0000","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088,1350 1088,0.0 -0.0,-0.0 0.0,868.9 666.2,867.9 666.2,1350 1088,1350\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195101:07660_01_1951-0000__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[766.5,353.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0789971,42.1377977]}},{"type":"Feature","properties":{"resourceCoords":[615.3,931.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07419,42.1219218]}}]}}]}