{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08131_008.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Columbia, South-Carolina | 1950 | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195001:08131_01_1950-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbia, South-Carolina | 1950 | sanborn08131_008 p0 [1]","metadata":[{"label":"streets","value":"64"},{"label":"intersections","value":"275"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6938.2"},{"label":"split_canvas_h","value":"8102.0"}],"created":"2026-09-22T02:56:06Z","modified":"2026-09-22T02:56:06Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195001:08131_01_1950-0000__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195001:08131_01_1950-0000/info.json","type":"ImageService2","height":7680,"width":6512},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6938.2,8102.0 6938.2,7335.8 6938.2,6677.2 6938.2,0.0 2963.4,0.0 2995.6,2485.4 2450.5,3017.2 0.0,3055.1 0.0,8102.0 6938.2,8102.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195001:08131_01_1950-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4455.7,4056.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-81.0361402,34.016447]}},{"type":"Feature","properties":{"resourceCoords":[4046.6,5620.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-81.0265409,34.0019534]}}]}}]}