{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn09064_016.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Richmond, Virginia | 1952 | 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:gmd388m:g3884m:g3884rm:g3884rm_g09064195201:09064_01_1952-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Richmond, Virginia | 1952 | sanborn09064_016 p0","metadata":[{"label":"streets","value":"91"},{"label":"intersections","value":"267"}],"created":"2026-09-21T23:30:29Z","modified":"2026-09-21T23:30:29Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884rm:g3884rm_g09064195201:09064_01_1952-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884rm:g3884rm_g09064195201:09064_01_1952-0000","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,1350.0 -0.0,1350.0 -0.0,-0.0 319.1,-0.0 319.1,-0.0 857.1,-0.0 1088.0,-0.0 1088.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884rm:g3884rm_g09064195201:09064_01_1952-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[771.9,397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4337727,37.5353287]}},{"type":"Feature","properties":{"resourceCoords":[90.5,295.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4605835,37.5568254]}}]}}]}