{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08235_008.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Groton, South-Dakota | 1930 | key map | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184gm:g082351930:08235_1930-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Groton, South-Dakota | 1930 | sanborn08235_008 p1 [1]","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"72"},{"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":"4144.3"}],"created":"2026-10-18T22:54:26Z","modified":"2026-10-18T22:54:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184gm:g082351930:08235_1930-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184gm:g082351930:08235_1930-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 0.0,0.0 0.0,843.9 671.1,838.5 671.1,1036.1 1613,1028.5 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184gm:g082351930:08235_1930-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[728.1,434.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.0958302,45.449275]}},{"type":"Feature","properties":{"resourceCoords":[779.5,530.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.094536,45.4472727]}}]}}]}