{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00533_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Eureka, California | 1957 | 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:g4364em:g4364em_g005331957:00533_1957-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Eureka, California | 1957 | sanborn00533_007 p0","metadata":[{"label":"streets","value":"90"},{"label":"intersections","value":"182"}],"created":"2026-09-21T14:48:11Z","modified":"2026-09-21T14:48:11Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364em:g4364em_g005331957:00533_1957-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364em:g4364em_g005331957:00533_1957-0000","type":"ImageService3","width":1110,"height":1359},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1110.0,1359.0 -0.0,1359.0 0.0,-0.0 1110.0,0.0 1110.0,1359.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364em:g4364em_g005331957:00533_1957-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.8,1110.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-124.172643,40.7766585]}},{"type":"Feature","properties":{"resourceCoords":[384.2,1109.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-124.1821237,40.7768545]}}]}}]}