{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08234_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Frederick, South-Dakota | 1898 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"3"},{"label":"placed","value":"1"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p1__2 (tier 4, 45.83281,-98.50697 +/-100m); p1__3 (tier 4, 45.83281,-98.50697 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184fm:g082341898:08234_1898-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, South-Dakota | 1898 | sanborn08234_002 p1 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.51"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-17T22:42:53Z","modified":"2026-10-17T22:42:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184fm:g082341898:08234_1898-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184fm:g082341898:08234_1898-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1541.3,1476.5 1593.0,198.9 1548.3,71.8 1049.5,31.3 895.5,89.0 283.8,33.5 89.0,150.6 63.0,110.3 71.8,423.3 384.6,427.9 385.8,433.0 390.0,433.0 390.0,450.8 403.4,508.0 390.0,695.4 390.0,739.0 386.9,739.0 386.8,740.8 87.1,743.1 46.2,809.1 90.8,1868.4 544.9,1775.1 1090.4,1809.6 1107.5,1550.2 1229.0,1482.2 1229.0,1479.5 1233.7,1479.5 1235.0,1478.8 1541.3,1476.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184fm:g082341898:08234_1898-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1082.0,218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.5048001,45.8322866]}},{"type":"Feature","properties":{"resourceCoords":[73.0,218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.5048425,45.8343309]}}]}}]}