{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00838_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Santa Rosa, California | 1950 | key map | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364sm:g4364sm_g008381950:00838_1950-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Santa Rosa, California | 1950 | sanborn00838_006 p0","metadata":[{"label":"streets","value":"101"},{"label":"intersections","value":"159"}],"created":"2026-10-18T16:54:21Z","modified":"2026-10-18T16:54:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364sm:g4364sm_g008381950:00838_1950-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364sm:g4364sm_g008381950:00838_1950-0000","type":"ImageService3","width":1637,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1920.0 0.0,0.0 1637.0,0.0 1637.0,1920.0 0.0,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364sm:g4364sm_g008381950:00838_1950-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[907.4,147.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.7152706,38.4587683]}},{"type":"Feature","properties":{"resourceCoords":[1115.0,332.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.7093536,38.4545802]}}]}}]}