{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03582_008.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Cambridge, Maryland | 1930 | 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://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844cm:g3844cm_g035821930:03582_1930-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Maryland | 1930 | sanborn03582_008 p1","metadata":[{"label":"streets","value":"54"},{"label":"intersections","value":"106"}],"created":"2026-09-23T17:01:00Z","modified":"2026-09-23T17:01:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844cm:g3844cm_g035821930:03582_1930-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844cm:g3844cm_g035821930:03582_1930-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1613.0,1913.0 -0.0,1913.0 0.0,-0.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844cm:g3844cm_g035821930:03582_1930-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[111.5,319.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.08496,38.578487]}},{"type":"Feature","properties":{"resourceCoords":[745.5,572.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.075691,38.562442]}}]}}]}