{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn05160_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Central City, Nebraska | 1933 | key map | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194cm:g051601933:05160_1933-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Central City, Nebraska | 1933 | sanborn05160_006 p1 [1]","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"103"},{"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":"6550.4"}],"created":"2026-10-19T22:42:34Z","modified":"2026-10-19T22:42:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194cm:g051601933:05160_1933-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194cm:g051601933:05160_1933-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 0.0,0.0 0.0,1035.1 1023.5,1028.8 1023.5,1637.6 1613,1637.6 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194cm:g051601933:05160_1933-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[487.9,662.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.000359,41.111078]}},{"type":"Feature","properties":{"resourceCoords":[438.0,139.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.001678,41.122556]}}]}}]}