{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn09010_009.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Danville, Virginia | 1951 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884dm:g3884dm_g090101951:09010_1951-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Danville, Virginia | 1951 | sanborn09010_009 p0","metadata":[{"label":"streets","value":"190"},{"label":"intersections","value":"193"}],"created":"2026-09-22T03:28:36Z","modified":"2026-09-22T03:28:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884dm:g3884dm_g090101951:09010_1951-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884dm:g3884dm_g090101951:09010_1951-0000","type":"ImageService3","width":1640,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1640.0,1920.0 -0.0,1920.0 -0.0,-0.0 1640.0,0.0 1640.0,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884dm:g3884dm_g090101951:09010_1951-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[778.1,1532.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-79.4098744,36.5778823]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,1053.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-79.37934,36.607045]}}]}}]}