{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00656_018.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Los Angeles, California | 1921 | 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://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656192107:00656_07_1921-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Los Angeles, California | 1921 | sanborn00656_018 p0","metadata":[{"label":"streets","value":"136"},{"label":"intersections","value":"725"}],"created":"2026-09-21T08:01:39Z","modified":"2026-09-21T08:01:39Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656192107:00656_07_1921-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656192107:00656_07_1921-0000","type":"ImageService3","width":1393,"height":1999},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1999.0 -0.0,-0.0 1393.0,0.0 1393.0,1999.0 -0.0,1999.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656192107:00656_07_1921-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[789.4,1305.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.3025193,34.0445539]}},{"type":"Feature","properties":{"resourceCoords":[933.2,399.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.2979226,34.0712075]}}]}}]}