{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/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://cdn.chronoscope.io/mapsnap/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://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"744.7,0.0 745.3,350.3 758.0,539.6 0.0,538.8 -0.0,1913 1613,1913 1613,-0.0 744.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364bm:g4364bm_g004371949:00437_1949-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1130.2,652.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.347072,37.5739692]}},{"type":"Feature","properties":{"resourceCoords":[482.0,779.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3651973,37.5855588]}}]}}]}