{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07616_001.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Delaware Co., Pennsylvania | 1919 | key map | mapsnap generated fit (2026-09-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-24"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g07616191901:07616_01_1919-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Delaware Co., Pennsylvania | 1919 | sanborn07616_001 p0","metadata":[{"label":"streets","value":"170"},{"label":"intersections","value":"257"}],"created":"2026-09-24T03:24:24Z","modified":"2026-09-24T03:24:24Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g07616191901:07616_01_1919-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g07616191901:07616_01_1919-0000","type":"ImageService3","width":1393,"height":2008},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1393.0,2008.0 -0.0,2008.0 0.0,319.4 0.0,0.0 1393.0,0.0 1393.0,2008.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g07616191901:07616_01_1919-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[770.8,1056.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.2853032,39.9120851]}},{"type":"Feature","properties":{"resourceCoords":[345.8,1471.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3257817,39.8821016]}}]}}]}