{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08877_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ogden, Utah | 1906 | 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:g088771906:08877_1906-0000__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 | 1906 | sanborn08877_003 p0 [2]","metadata":[{"label":"streets","value":"63"},{"label":"intersections","value":"507"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6870.5"},{"label":"split_canvas_h","value":"8217.6"}],"created":"2026-09-21T13:28:27Z","modified":"2026-09-21T13:28:27Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771906:08877_1906-0000__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771906:08877_1906-0000/info.json","type":"ImageService2","height":7796,"width":6444},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6870.5,8217.6 6870.5,0.0 -0.0,-0.0 0.0,5228.3 1488.4,5228.3 1475.6,8217.6 6870.5,8217.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd434m:g4344m:g4344om:g088771906:08877_1906-0000__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3685.3,2044.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-111.9672661,41.2377395]}},{"type":"Feature","properties":{"resourceCoords":[4699.4,6661.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-111.9569877,41.199566]}}]}}]}