{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07372_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Gresham, Oregon | 1922 | 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:gmd429m:g4294m:g4294gm:g4294gm_g073721922:07372_1922-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Gresham, Oregon | 1922 | sanborn07372_002 p1 [2]","metadata":[{"label":"streets","value":"22"},{"label":"intersections","value":"61"},{"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":"4497.9"}],"created":"2026-09-23T03:34:38Z","modified":"2026-09-23T03:34:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd429m:g4294m:g4294gm:g4294gm_g073721922:07372_1922-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd429m:g4294m:g4294gm:g4294gm_g073721922:07372_1922-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,0.0 2029.8,0.0 1309.2,0.0 0.0,-0.0 0.0,4474.0 6878.4,4497.9 6878.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd429m:g4294m:g4294gm:g4294gm_g073721922:07372_1922-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5466.5,2271.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.4258716,45.4996424]}},{"type":"Feature","properties":{"resourceCoords":[4781.8,2255.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.4325561,45.4997247]}}]}}]}