{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08228_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Elk Point, South-Dakota | 1898 | 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"},{"label":"pages","value":"7"},{"label":"placed","value":"5"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 5"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 7 panels"},{"label":"unplaced pages","value":"p1__2 (tier 1, 42.68700,-96.68067 +/-163m); p1__4 (tier 4, 42.68501,-96.68414 +/-371m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_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":"Elk Point, South-Dakota | 1898 | sanborn08228_003 p1 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.93"},{"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":"3904.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-18T06:26:42Z","modified":"2026-10-18T06:26:42Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.5,1809.8 339.6,1877.8 929.1,1821.9 916.0,193.1 841.8,99.7 131.7,142.4 88.0,123.5 81.6,1294.6 81.5,1809.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[666.0,756.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6852278,42.6876822]}},{"type":"Feature","properties":{"resourceCoords":[666.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6840814,42.6871691]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elk Point, South-Dakota | 1898 | sanborn08228_003 p1 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.56"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"5026.0"},{"label":"split_canvas_y","value":"4490.0"},{"label":"split_canvas_w","value":"1486.0"},{"label":"split_canvas_h","value":"1780.0"}],"created":"2026-10-18T06:26:42Z","modified":"2026-10-18T06:26:42Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1535.2,1148.0 1312.2,1165.3 1354.5,1460.1 1567.2,1536.8 1535.2,1148.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1256.5,1122.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68035103342554,42.685337611955234]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1122.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67986435498136,42.68591391204147]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1567.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67892496593248,42.685486664625465]}},{"type":"Feature","properties":{"resourceCoords":[1256.5,1567.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67941164437666,42.68491036453923]}},{"type":"Feature","properties":{"resourceCoords":[1311.4,1475.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6795339,42.6850839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elk Point, South-Dakota | 1898 | sanborn08228_003 p2 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.45"},{"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":"1690.0"},{"label":"split_canvas_h","value":"1240.0"}],"created":"2026-10-18T06:26:42Z","modified":"2026-10-18T06:26:42Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.0,246.9 317.4,287.3 421.5,185.0 421.5,92.3 378.4,119.0 308.8,49.1 16.1,13.2 16.6,308.6 144.0,246.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68695434666454,42.6827520533286]}},{"type":"Feature","properties":{"resourceCoords":[422.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68640152929926,42.68340548299466]}},{"type":"Feature","properties":{"resourceCoords":[422.5,310.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.6857474538804,42.68310745903384]}},{"type":"Feature","properties":{"resourceCoords":[0.0,310.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68630027124567,42.68245402936778]}},{"type":"Feature","properties":{"resourceCoords":[372.4,265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6859079,42.6830733]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elk Point, South-Dakota | 1898 | sanborn08228_003 p2 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.95"},{"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":"2026-10-18T06:26:42Z","modified":"2026-10-18T06:26:42Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3.5,1700.8 75.3,1856.4 398.1,1897.5 1536.0,1887.7 1606.1,1791.2 1598.2,1276.7 1586.6,106.9 1405.3,31.3 472.6,34.0 425.3,596.5 93.2,596.2 42.6,654.3 53.2,1599.6 1.0,1632.5 1.0,1653.1 3.5,1700.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1018.0,1290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6855809,42.6853519]}},{"type":"Feature","properties":{"resourceCoords":[1018.0,1830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6844462,42.6848262]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Elk Point, South-Dakota | 1898 | sanborn08228_003 p2 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1240.0"},{"label":"split_canvas_w","value":"1690.0"},{"label":"split_canvas_h","value":"1136.0"}],"created":"2026-10-18T06:26:42Z","modified":"2026-10-18T06:26:42Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.7,324.0 19.2,320.3 7.8,564.1 382.4,588.0 407.9,352.7 304.2,410.1 205.7,324.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184em:g082281898:08228_1898-0002__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,310.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68372286910407,42.683958960288216]}},{"type":"Feature","properties":{"resourceCoords":[422.5,310.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.6831583777662,42.68460915447474]}},{"type":"Feature","properties":{"resourceCoords":[422.5,594.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68256353690721,42.684331019555266]}},{"type":"Feature","properties":{"resourceCoords":[0.0,594.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.68312802824508,42.68368082536874]}},{"type":"Feature","properties":{"resourceCoords":[257.7,352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6832906,42.6843144]}}]}}]}