{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn06975_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Altus, Oklahoma | 1914 | 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:gmd402m:g4024m:g4024am:g4024am_g069751914:06975_1914-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Altus, Oklahoma | 1914 | sanborn06975_003 p1 [1]","metadata":[{"label":"streets","value":"27"},{"label":"intersections","value":"104"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"5447.2"}],"created":"2026-09-23T12:33:52Z","modified":"2026-09-23T12:33:52Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd402m:g4024m:g4024am:g4024am_g069751914:06975_1914-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd402m:g4024m:g4024am:g4024am_g069751914:06975_1914-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,5447.2 6878.4,0.0 -0.0,-0.0 0.0,5445.6 2305.0,5446.1 6779.8,5447.2 6878.4,5447.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd402m:g4024m:g4024am:g4024am_g069751914:06975_1914-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1115.5,2878.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-99.3365921,34.6345671]}},{"type":"Feature","properties":{"resourceCoords":[1257.3,537.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-99.3352327,34.6522161]}}]}}]}