{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08131_010.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Columbia, South-Carolina | 1956 | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195601:08131_01_1956-0000/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 | 1956 | sanborn08131_010 p0","metadata":[{"label":"streets","value":"56"},{"label":"intersections","value":"215"}],"created":"2026-09-21T21:42:18Z","modified":"2026-09-21T21:42:18Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195601:08131_01_1956-0000/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195601:08131_01_1956-0000/info.json","type":"ImageService2","height":5520,"width":4400},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5520.0 0.0,-0.0 4400.0,0.0 4400.0,263.0 4400.0,567.2 4400.0,952.0 4400.0,952.8 4400.0,1469.5 4400.0,1666.0 4400.0,1792.2 4400.0,1899.9 4400.0,3981.3 4400.0,4302.0 4400.0,5520.0 -0.0,5520.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd391m:g3914m:g3914cm:g3914cm_g08131195601:08131_01_1956-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2348.0,4507.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-81.0177173,33.9913853]}},{"type":"Feature","properties":{"resourceCoords":[1646.0,1973.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-81.0484856,34.00578]}}]}}]}