{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00656_050.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Los Angeles, California | 1950 | 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_g00656195001:00656_01_1950-0000a/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 | 1950 | sanborn00656_050 p0a","metadata":[{"label":"streets","value":"78"},{"label":"intersections","value":"272"}],"created":"2026-09-21T09:30:28Z","modified":"2026-09-21T09:30:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000a/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000a","type":"ImageService3","width":1412,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1384.8,2038.0 -0.0,2038.0 0.0,770.2 0.0,-0.0 1412.0,-0.0 1412.0,16.4 1383.2,24.1 1403.2,106.8 1412.0,121.8 1412.0,128.9 1379.7,129.1 1377.5,236.9 1378.1,256.8 1384.8,266.1 1381.4,482.1 1383.5,486.4 1393.4,490.1 1389.8,615.6 1412.0,615.6 1412.0,770.1 1366.0,769.8 1361.0,923.0 1367.2,923.1 1367.8,1077.3 1407.7,1077.5 1409.3,1094.6 1406.8,1204.3 1410.4,1235.1 1406.8,1354.2 1395.9,1392.8 1387.0,1715.6 1364.6,1717.3 1412.0,1810.0 1412.0,1851.1 1394.1,1851.6 1412.0,1889.6 1412.0,1931.8 1380.2,1948.4 1370.9,1953.4 1371.0,1999.2 1366.7,2001.4 1384.8,2038.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000a/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.2,189.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.2803387,34.0729354]}},{"type":"Feature","properties":{"resourceCoords":[1314.0,846.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.2744856,34.0533792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000b/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 | 1950 | sanborn00656_050 p0b","metadata":[{"label":"streets","value":"122"},{"label":"intersections","value":"537"}],"created":"2026-09-21T09:30:28Z","modified":"2026-09-21T09:30:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000b/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000b","type":"ImageService3","width":1420,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"387.9,2038.0 1.1,2038.0 14.0,2031.3 -0.0,2002.8 -0.0,1946.2 58.2,1916.5 23.6,1845.4 62.1,1845.1 -0.0,1722.3 -0.0,1711.0 16.9,1710.3 27.0,1390.1 37.4,1359.2 42.0,1233.7 38.6,1203.1 39.9,1077.3 -0.0,1076.7 -0.0,771.5 48.3,772.3 54.8,619.1 23.6,618.7 27.7,494.2 17.9,490.5 15.8,486.2 19.9,271.8 12.7,260.3 15.3,135.8 52.1,136.0 38.9,113.9 19.1,31.7 48.0,24.2 48.0,8.0 0.0,7.5 0.0,0.0 1420.0,-0.0 1420.0,2038.0 387.9,2038.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g00656195001:00656_01_1950-0000b/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[195.1,590.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.2653064,34.0560618]}},{"type":"Feature","properties":{"resourceCoords":[121.8,1189.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-118.2747528,34.044664]}}]}}]}