{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn00437_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Burlingame, California | 1949 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlingame, California | 1949 | sanborn00437_004 p1 [1]","metadata":[{"label":"streets","value":"67"},{"label":"intersections","value":"126"},{"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":"8074.1"}],"created":"2026-09-22T08:19:26Z","modified":"2026-09-22T08:19:26Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2978.7,0.0 2981.1,1401.3 3031.8,2158.6 0.0,2155.2 -0.0,8074.1 6878.4,8074.1 6878.4,-0.0 2978.7,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4520.6,2610.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.347072,37.5739692]}},{"type":"Feature","properties":{"resourceCoords":[1928.1,3117.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3651973,37.5855588]}}]}}]}