{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08877_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ogden, Utah | 1949 | 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:gmd434m:g4344m:g4344om:g088771949:08877_1949-0000__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ogden, Utah | 1949 | sanborn08877_004 p0 [2]","metadata":[{"label":"streets","value":"88"},{"label":"intersections","value":"525"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6798.8"},{"label":"split_canvas_h","value":"8217.7"}],"created":"2026-09-21T13:52:07Z","modified":"2026-09-21T13:52:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771949:08877_1949-0000__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771949:08877_1949-0000/info.json","type":"ImageService2","height":7796,"width":6372},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6798.8,0.0 -0.0,0.0 0.0,5257.8 1347.2,5260.1 1368.6,7866.2 1368.6,8217.7 6798.8,8217.7 6798.8,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771949:08877_1949-0000__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3492.2,1941.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-111.967217,41.2396859]}},{"type":"Feature","properties":{"resourceCoords":[3749.4,5275.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-111.9651027,41.2115663]}}]}}]}