{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08247_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Madison, South-Dakota | 1921 | 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"},{"label":"pages","value":"18"},{"label":"placed","value":"16"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef-snap 9, georef 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 9 panels"},{"label":"unplaced pages","value":"p12__2 (tier 1, 44.00352,-97.11872 +/-120m); p13__2 (tier 1, 44.00178,-97.11089 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0010","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"403.9,76.0 1057.9,67.4 1033.6,103.2 1439.3,91.2 1470.8,62.0 1466.2,1219.4 1465.7,1338.4 1510.7,1822.2 1160.8,1813.4 1016.0,1790.8 994.7,1732.7 635.7,1779.1 635.8,1731.5 394.0,1738.0 139.0,1749.2 111.7,1237.2 114.5,1237.2 144.7,636.9 149.5,636.9 82.8,80.3 403.9,76.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[942.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.109693,44.005136]}},{"type":"Feature","properties":{"resourceCoords":[394.0,1738.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1110944,44.003068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p11 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.52"},{"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":"1614.8"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"96.7,1389.3 119.6,1812.8 348.1,1788.1 399.0,652.9 330.3,101.2 156.3,39.1 48.6,71.7 20.2,239.4 74.1,938.8 37.8,1227.5 96.7,1389.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[157.9,1318.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.12278,44.012456]}},{"type":"Feature","properties":{"resourceCoords":[157.9,1854.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.122766,44.01138]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p11 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1614.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4897.2"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"506.7,1872.8 532.9,1873.4 632.7,1816.7 774.9,1874.2 1550.8,1869.5 1601.5,1627.5 1620.0,295.6 1578.1,32.0 873.3,44.0 816.2,86.5 517.4,42.8 462.4,124.8 462.4,141.9 461.2,1280.1 461.0,1396.7 506.7,1872.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1273.2,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.10618756785055,44.004168636841854]}},{"type":"Feature","properties":{"resourceCoords":[447.7,149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.10837157441573,44.006188211968855]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p12 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"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":"5782.4"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,172.3 1.0,172.5 26.7,175.9 50.5,1387.3 1.6,1444.6 87.7,1444.6 1541.4,1438.1 1541.6,1444.6 1551.4,1444.6 1575.5,1387.2 1578.7,1387.0 1573.7,609.4 1563.5,77.9 1025.0,110.4 497.0,142.3 1.0,172.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[525.0,1421.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11680698054836,44.00045790524406]}},{"type":"Feature","properties":{"resourceCoords":[525.0,124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11676008023831,44.00291374188947]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p12 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.06"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4255.2"},{"label":"split_canvas_y","value":"5782.4"},{"label":"split_canvas_w","value":"2256.8"},{"label":"split_canvas_h","value":"1925.6"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1169.5,1896.3 1151.3,1912.8 1597.2,1887.8 1574.8,1462.7 1312.0,1498.6 1081.0,1466.0 1085.0,1841.0 1157.5,1873.0 1169.5,1896.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0012__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1236.5,1862.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1198494,44.0003703]}},{"type":"Feature","properties":{"resourceCoords":[1236.5,1477.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1198563,44.0012001]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p13 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.48"},{"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":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.3,1358.7 35.0,1411.4 40.0,1847.9 92.6,1894.3 1565.6,1886.3 1597.0,486.2 1531.2,386.9 1491.8,381.1 1330.5,380.0 1330.5,360.7 1330.5,357.5 1300.2,353.1 1267.9,148.2 1330.5,139.9 1330.5,117.0 1330.5,96.5 1110.0,103.0 709.6,121.6 601.2,126.7 77.0,145.4 78.0,638.0 70.2,1358.7 67.3,1358.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[78.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1140194,44.0019679]}},{"type":"Feature","properties":{"resourceCoords":[1110.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1110944,44.003068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p14 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"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":"4124.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"992.5,67.5 936.7,24.6 767.1,22.6 729.7,73.8 708.1,29.3 131.9,118.3 40.9,331.1 36.7,1311.8 110.0,1349.5 60.0,1835.7 752.4,1895.5 1014.7,1836.6 1015.7,1804.1 1029.0,1381.4 1029.0,1345.5 1029.0,1294.5 975.8,1293.1 989.2,577.3 992.5,67.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[984.0,570.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11405372012646,44.01267761796214]}},{"type":"Feature","properties":{"resourceCoords":[984.0,1846.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11401529995112,44.01034332864612]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p14 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4116.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2396.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1538.3,1912.7 1574.5,1184.1 1578.1,1184.1 1584.6,61.0 1502.9,76.0 1109.2,54.0 1072.7,163.3 1130.3,1847.6 1494.9,1818.6 1538.3,1912.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0014__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1581.0,591.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1227851,44.0050458]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,1756.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.122789,44.0028904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"340.6,1888.2 90.8,1892.0 39.0,1827.2 30.9,314.1 78.3,73.3 1415.5,12.5 1554.7,253.6 1575.0,253.0 1575.0,1848.5 1575.0,1903.8 868.6,1909.5 365.7,1919.6 340.6,1888.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1575.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1097973,44.0113089]}},{"type":"Feature","properties":{"resourceCoords":[1575.0,788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1111765,44.0113237]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1562.5,815.9 1561.7,1346.6 1548.8,1346.9 1511.5,1876.5 1352.0,1878.3 1305.6,1891.3 1199.6,1893.0 1198.5,1869.8 720.5,1868.4 724.9,1886.3 693.5,1886.1 200.3,1882.3 204.9,317.7 185.0,318.2 49.2,81.4 1304.8,27.9 1462.0,47.5 1487.8,79.9 1491.3,303.6 1564.1,303.9 1558.2,816.0 1562.5,815.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[753.0,1348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11252325285912,44.010295945047]}},{"type":"Feature","properties":{"resourceCoords":[1318.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11383455794454,44.009238810675576]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1623.0,1839.9 1337.5,1843.8 972.3,1849.0 419.9,1851.8 84.9,1847.7 40.8,1676.5 58.3,67.6 436.9,22.1 837.8,90.8 1259.2,30.7 1624.6,81.3 1623.0,1839.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[427.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.12136673083099,44.00709176351127]}},{"type":"Feature","properties":{"resourceCoords":[427.0,699.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.12135554896523,44.00825588559202]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.0,129.5 347.6,21.9 517.5,21.1 659.5,112.4 1175.7,32.1 1289.2,88.2 1423.4,45.0 1444.9,94.5 1627.0,87.3 1627.0,192.5 1586.4,192.4 1594.7,739.0 1602.3,1247.8 1627.0,1306.9 1627.0,1441.6 1627.0,1495.1 1624.5,1840.1 1343.0,1847.5 1085.2,1851.5 24.9,1866.3 30.1,125.5 58.0,129.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[573.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1167645914637,44.00931789700039]}},{"type":"Feature","properties":{"resourceCoords":[83.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11806318577277,44.009322404367126]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"410.9,1910.4 940.9,1900.2 1002.3,1874.1 1557.7,1874.3 1541.3,1299.2 1525.1,733.0 1506.1,67.5 1543.0,91.7 1534.2,61.6 1502.8,65.4 1454.0,33.5 60.6,39.0 36.2,8.3 36.0,11.0 35.0,11.0 38.0,237.9 113.2,238.4 105.5,767.6 110.0,767.5 107.6,1316.0 94.4,1316.2 54.2,1863.5 1.0,1864.0 1.0,1918.4 410.9,1910.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[974.0,1318.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11257047915828,44.007181695626045]}},{"type":"Feature","properties":{"resourceCoords":[974.0,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11112046938266,44.00717209438362]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0007","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.6,1169.3 124.2,1169.3 136.2,48.0 257.6,26.3 672.5,21.4 1235.0,25.4 1576.4,24.6 1592.2,577.1 1579.8,1173.0 1571.5,1173.0 1602.8,1792.7 1613.4,1792.3 1627.0,1791.7 1627.0,1822.7 969.4,1902.0 80.8,1896.5 120.6,1169.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[673.0,1748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.12137022425131,44.00288161832838]}},{"type":"Feature","properties":{"resourceCoords":[1243.0,579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11991776591218,44.00505329485316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p8","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.6,1849.2 141.1,1849.7 104.1,1228.9 112.5,1228.9 119.4,631.7 98.6,78.1 129.2,77.8 420.5,74.8 1513.7,60.7 1512.4,619.1 1514.0,1780.5 973.4,1807.7 166.3,1848.4 166.6,1879.4 165.6,1879.5 151.6,1849.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[969.0,624.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1168343,44.0050684]}},{"type":"Feature","properties":{"resourceCoords":[413.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.1182752,44.0028313]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Madison, South-Dakota | 1921 | sanborn08247_006 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T00:55:48Z","modified":"2026-10-19T00:55:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"359.3,84.4 649.7,77.6 1219.4,65.7 1456.7,60.7 1528.3,621.3 1523.4,621.3 1497.7,1226.8 1494.9,1226.8 1526.3,1742.7 1340.8,1752.3 1221.0,1758.5 641.6,1782.2 89.7,1808.8 90.7,646.5 93.2,87.6 359.3,84.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184mm:g082471921:08247_1921-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1224.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11252894055396,44.00400897693331]}},{"type":"Feature","properties":{"resourceCoords":[109.0,651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.11539040965576,44.00506528417634]}}]}}]}