{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07575_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chambersburg, Pennsylvania | 1916 | 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:g3824cm:g3824cm_g075751916:07575_1916-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chambersburg, Pennsylvania | 1916 | sanborn07575_006 p1","metadata":[{"label":"streets","value":"61"},{"label":"intersections","value":"170"}],"created":"2026-09-23T10:09:50Z","modified":"2026-09-23T10:09:50Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075751916:07575_1916-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075751916:07575_1916-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 0.0,0.0 6452.0,0.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075751916:07575_1916-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2463.8,2929.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.6575887,39.9450926]}},{"type":"Feature","properties":{"resourceCoords":[1453.5,3168.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.6650458,39.9445812]}}]}}]}