{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn09068_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Salem, Virginia | 1903 | 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:gmd388m:g3884m:g3884sm:g3884sm_g090681903:09068_1903-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Salem, Virginia | 1903 | sanborn09068_004 p1 [2]","metadata":[{"label":"streets","value":"32"},{"label":"intersections","value":"96"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3967.1"},{"label":"split_canvas_h","value":"4613.0"}],"created":"2026-09-23T01:07:49Z","modified":"2026-09-23T01:07:49Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884sm:g3884sm_g090681903:09068_1903-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884sm:g3884sm_g090681903:09068_1903-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3967.1,2683.6 3966.8,2461.8 3963.5,0.0 -0.0,0.0 0.0,1912.4 0.0,2519.6 0.0,4587.5 2601.2,4613.0 2601.8,4613.0 2655.2,2480.7 3967.1,2708.0 3967.1,2683.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884sm:g3884sm_g090681903:09068_1903-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[646.2,1770.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.059057,37.293478]}},{"type":"Feature","properties":{"resourceCoords":[3284.9,744.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.048634,37.281253]}}]}}]}