{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08251_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mitchell, South-Dakota | 1903 | 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:gmd418m:g4184m:g4184mm:g082511903:08251_1903-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mitchell, South-Dakota | 1903 | sanborn08251_005 p1 [2]","metadata":[{"label":"streets","value":"44"},{"label":"intersections","value":"140"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6938.1"},{"label":"split_canvas_h","value":"5398.5"}],"created":"2026-10-19T20:46:15Z","modified":"2026-10-19T20:46:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082511903:08251_1903-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082511903:08251_1903-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1628,0.0 0.0,0.0 0.0,1349.6 1628,1335.0 1628,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082511903:08251_1903-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[111.9,1133.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.035519,43.699772]}},{"type":"Feature","properties":{"resourceCoords":[300.6,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.0311747,43.7186993]}}]}}]}