{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08210_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Britton, 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":"15"},{"label":"placed","value":"10"},{"label":"unplaced","value":"5"},{"label":"fit sources","value":"georef 7, georef-snap 3"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 10 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 45.79096,-97.74836 +/-281m); p8__2 (tier 1, 45.78946,-97.75081 +/-100m); p8__3 (tier 1, 45.78831,-97.75267 +/-100m); p8__4 (tier 1, 45.79078,-97.75105 +/-100m); p8__5 (tier 1, 45.79021,-97.75567 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p2","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.8,181.1 93.7,752.0 130.6,752.0 98.4,1317.1 84.5,1317.2 128.8,1883.0 180.1,1883.0 1304.6,1882.9 1597.6,1882.8 1582.0,1314.0 1574.2,1314.0 1580.2,752.0 1571.3,752.0 1584.1,180.2 1627.0,179.7 1627.0,111.7 1575.4,120.0 1508.8,32.4 1362.6,99.3 1156.8,19.9 269.8,40.2 50.4,136.9 1.0,142.4 1.0,181.2 75.8,181.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1304.0,752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7534834,45.7964975]}},{"type":"Feature","properties":{"resourceCoords":[180.0,752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7564493,45.7965105]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p3 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"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":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"365.6,1876.7 1502.8,1875.7 1501.7,1580.8 1503.3,998.5 1285.3,998.5 1180.6,1024.2 389.7,999.6 389.6,998.5 385.0,998.5 385.5,938.6 332.8,179.7 265.6,69.2 126.7,91.5 125.7,160.2 82.4,160.8 69.6,737.0 78.5,737.0 72.5,1303.5 80.4,1303.5 96.1,1876.7 365.6,1876.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[364.0,737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7520072,45.796491]}},{"type":"Feature","properties":{"resourceCoords":[1506.0,737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7490173,45.7964778]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p3 [2]","metadata":[{"label":"streets","value":"4"},{"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":"1540.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4972.0"},{"label":"split_canvas_h","value":"3994.0"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1627.0,886.8 1627.0,849.7 1582.1,842.5 1548.2,36.0 526.2,19.0 392.6,50.5 392.6,54.2 392.5,66.8 538.4,68.0 531.7,635.4 530.2,922.7 1099.0,928.5 1099.2,910.1 1627.0,886.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.0,362.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7490329,45.7954494]}},{"type":"Feature","properties":{"resourceCoords":[1099.0,928.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7475155,45.7943912]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"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":"2762.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"483.4,71.5 125.3,115.5 115.1,1327.2 103.5,1328.2 105.8,1528.1 109.1,1807.2 627.9,1802.3 578.5,1239.6 592.3,1239.5 619.1,676.7 582.4,677.0 559.3,109.1 483.8,110.0 483.4,71.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[114.1,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75794107152602,45.795480866471785]}},{"type":"Feature","properties":{"resourceCoords":[114.1,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75789392813542,45.797584299253344]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p4 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2691.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3820.4"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1035.7,100.5 1035.6,88.5 717.0,95.7 746.0,576.4 791.0,656.8 936.6,679.4 1039.8,679.1 1056.0,697.9 1075.8,1161.1 1043.1,1214.9 1043.1,1215.5 1042.7,1215.5 1039.8,1220.4 753.9,1289.8 766.9,1789.8 1017.3,1838.5 1252.1,1806.5 1546.0,1803.2 1561.4,1861.8 1618.2,1869.3 1616.4,1520.5 1610.3,1234.8 1612.2,675.8 1609.2,97.7 1035.7,100.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1072.5,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75791445895479,45.792336754779676]}},{"type":"Feature","properties":{"resourceCoords":[1072.5,101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75788074825158,45.79443471895103]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p4 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.56"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2724.4"},{"label":"split_canvas_y","value":"2720.0"},{"label":"split_canvas_w","value":"1448.0"},{"label":"split_canvas_h","value":"2154.0"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1030.8,761.1 1039.4,718.6 1039.4,718.6 1006.8,724.7 701.1,815.8 719.6,1216.7 1027.6,1214.2 1030.8,761.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0004__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1020.1,1198.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75799810561688,45.79448818418248]}},{"type":"Feature","properties":{"resourceCoords":[1020.1,704.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.75800238059297,45.79542867210569]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p5","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.0,1527.9 107.3,1241.1 112.0,679.6 112.0,99.0 1244.9,99.1 1555.7,99.1 1530.3,678.8 1537.7,678.8 1548.8,1239.7 1560.8,1239.8 1549.3,1806.3 1245.5,1806.5 677.0,1807.0 677.1,1926.0 624.0,1926.0 623.7,1874.4 158.4,1884.6 111.9,1878.2 112.0,1527.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[677.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7550153,45.7913045]}},{"type":"Feature","properties":{"resourceCoords":[112.0,99.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7564678,45.7944298]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p6","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"107.0,1805.2 118.5,1238.7 106.6,1238.7 95.5,677.8 88.1,677.8 113.6,98.1 367.5,98.2 1504.1,97.6 1501.9,674.8 1496.4,931.4 1501.0,1236.0 1481.7,1236.0 1429.2,1804.8 1385.5,1804.8 941.9,1804.6 373.0,1805.0 107.0,1805.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[373.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7520339,45.7912935]}},{"type":"Feature","properties":{"resourceCoords":[1501.0,1236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7490706,45.7923204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p7","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0007","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"59.0,1799.8 1.0,1798.9 1.0,1799.8 18.6,1817.7 143.4,1892.8 262.1,1842.2 1591.5,1840.4 1600.4,164.1 1520.2,59.9 1331.3,28.5 1330.0,66.4 788.2,86.5 787.9,105.2 204.3,95.1 193.0,672.0 183.5,928.5 183.3,1233.0 164.0,1232.7 102.6,1800.5 59.0,1799.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[193.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7490595,45.7933453]}},{"type":"Feature","properties":{"resourceCoords":[760.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.747545,45.7912749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Britton, South-Dakota | 1921 | sanborn08210_006 p8 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.96"},{"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":"2026-10-19T05:43:15Z","modified":"2026-10-19T05:43:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"443.6,1839.7 468.2,1355.5 473.6,1354.4 473.7,1349.0 500.8,1349.2 709.7,1309.1 1120.7,1349.0 1130.9,1306.4 1131.0,1296.9 1133.2,1296.9 1134.8,1290.2 1450.1,1294.5 1522.9,1235.1 1506.6,1073.9 908.6,661.8 1038.8,484.6 1585.1,853.1 1587.2,325.1 1535.3,267.0 1278.7,269.5 1267.4,238.5 1258.0,238.4 1258.0,212.6 1188.3,21.1 139.8,24.1 138.5,1.0 104.5,1.0 104.8,95.0 107.4,659.7 110.0,1225.3 112.6,1789.7 230.7,1789.1 230.9,1841.8 443.6,1839.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184bm:g082101921:08210_1921-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[686.0,94.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7505564,45.7902188]}},{"type":"Feature","properties":{"resourceCoords":[686.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.7550232,45.7902495]}}]}}]}