{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02833_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Spencer, Iowa | 1946 | 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":"18"},{"label":"placed","value":"14"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef 8, georef-snap 5, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 9 panels"},{"label":"unplaced pages","value":"p12__1 (tier 1, 43.15620,-95.15431 +/-173m); p13__2 (tier 1, 43.13104,-95.14394 +/-145m); p13__3 (tier 1, 43.14981,-95.13506 +/-103m); p7__2 (tier 2, 43.14258,-95.13323 +/-308m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p10","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"126.4,1394.9 114.2,1393.2 122.4,995.6 84.6,995.7 85.8,150.2 412.1,150.6 828.6,110.8 949.0,117.1 1149.7,72.5 1222.8,80.0 1318.5,147.5 1498.4,149.6 1497.9,439.9 1505.6,464.3 1522.2,466.9 1552.2,806.5 1525.1,1462.9 1533.6,1493.8 1506.3,1515.8 1505.4,1583.5 1503.8,1661.0 1502.8,1712.5 1502.5,1725.8 690.2,1676.4 601.4,1675.5 394.0,1673.2 393.9,1661.5 77.5,1631.8 126.4,1394.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[901.0,996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.133979,43.14613]}},{"type":"Feature","properties":{"resourceCoords":[901.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.134202,43.149232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"199.8,191.5 219.0,192.1 117.3,53.9 335.1,69.0 939.7,28.5 1263.2,81.1 1572.2,70.4 1555.2,1020.3 1577.8,1284.7 1572.5,1284.6 1402.9,1552.0 1397.3,1552.0 1394.8,1802.6 850.4,1839.4 850.6,1814.3 818.2,1814.8 552.9,1814.5 210.6,1809.3 82.0,1810.5 144.0,737.3 172.0,737.5 199.8,191.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1405.0,1549.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14251540226246,43.15091068254133]}},{"type":"Feature","properties":{"resourceCoords":[1405.0,214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14292174470684,43.15581557112859]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p12 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"834.6,1856.3 1191.2,1829.2 1191.6,1818.0 1465.6,1818.8 1519.0,743.1 1547.0,743.0 1570.5,195.9 1589.7,196.3 1486.7,58.8 1298.3,47.2 722.0,101.7 181.6,33.0 69.1,74.9 36.8,411.5 46.0,728.1 79.0,869.5 49.4,1224.6 67.0,1240.2 78.1,1450.4 158.9,1450.9 142.7,1479.5 638.6,1487.0 785.9,1623.4 782.6,1825.4 834.6,1856.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1506.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14889677751349,43.14967750036121]}},{"type":"Feature","properties":{"resourceCoords":[1506.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14932546465835,43.15566207503881]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p13 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.89"},{"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":"6452.0"},{"label":"split_canvas_h","value":"3738.8"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1230.0,862.8 1612.0,825.6 1612.0,820.0 1559.6,810.3 1537.0,746.5 1195.0,725.4 1158.5,646.1 1150.5,439.2 1019.5,403.1 1025.7,64.1 499.9,30.1 262.1,65.9 260.9,53.4 255.5,53.4 87.7,323.8 82.1,323.8 82.0,581.1 355.5,581.4 355.5,593.6 902.2,592.0 902.4,863.0 1230.0,862.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[82.0,54.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.142622,43.151885]}},{"type":"Feature","properties":{"resourceCoords":[82.0,863.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.142416,43.148923]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p13 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2566.8"},{"label":"split_canvas_w","value":"3506.8"},{"label":"split_canvas_h","value":"5085.2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.3,1843.3 501.1,1883.7 482.2,1868.7 519.8,1853.5 768.5,1853.0 832.4,1781.3 830.3,865.9 800.1,835.9 796.0,704.0 728.1,659.0 566.0,651.8 392.9,697.4 321.2,663.7 159.2,660.3 140.4,690.5 117.7,667.9 72.6,698.1 28.8,1297.2 75.0,1764.2 41.3,1843.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[312.9,977.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14416088117079,43.13338567917968]}},{"type":"Feature","properties":{"resourceCoords":[826.7,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14164953790527,43.13033917343161]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p13 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.30"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3474.4"},{"label":"split_canvas_y","value":"3715.2"},{"label":"split_canvas_w","value":"2977.6"},{"label":"split_canvas_h","value":"3936.8"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1552.0,1168.6 1525.5,963.6 1480.0,991.7 1124.3,954.4 931.1,1066.2 929.4,1117.8 896.4,1220.2 919.2,1316.9 903.5,1689.2 936.9,1804.8 1251.3,1855.5 1503.2,1860.2 1533.2,1664.7 1537.8,1665.3 1552.0,1168.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0013__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[868.6,928.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.15698805382988,43.14399235381488]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,928.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.15328623288127,43.14408033018214]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.15312793434566,43.140483959472185]}},{"type":"Feature","properties":{"resourceCoords":[868.6,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.15682975529427,43.14039598310492]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"789.0,216.8 788.5,163.6 1359.9,90.0 1356.5,222.2 1360.5,764.9 1362.8,1851.9 783.9,1851.5 326.5,1852.0 331.9,1347.0 254.2,1346.5 251.9,775.9 245.0,220.2 789.0,216.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[337.0,1830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.1472217627177,43.14034725155868]}},{"type":"Feature","properties":{"resourceCoords":[248.0,224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14764375613697,43.14328947282428]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p3","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"211.3,164.3 218.0,705.0 225.6,1788.1 814.4,1783.8 998.2,1781.5 1503.8,1268.5 1338.0,1270.0 1329.0,144.8 786.0,73.7 305.4,1.0 214.8,1.0 211.3,164.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[218.0,705.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.1447762,43.1423959]}},{"type":"Feature","properties":{"resourceCoords":[1338.0,1270.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.141883,43.141445]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p4","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.5,1543.1 143.5,1543.0 176.3,1074.3 172.4,1074.3 239.4,591.4 294.5,591.5 296.2,104.6 872.0,105.7 1459.9,105.1 1457.7,1541.7 1460.1,1541.7 1511.3,1851.2 1454.8,1876.0 877.6,1876.2 779.6,1791.0 547.1,1764.7 301.1,1861.9 112.0,1845.1 40.5,1768.5 138.5,1543.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[870.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.1445183,43.1386074]}},{"type":"Feature","properties":{"resourceCoords":[870.0,591.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14458,43.139503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1404.6,1797.3 1092.3,1798.8 698.2,1655.9 209.2,1633.1 111.7,1664.7 226.4,1519.8 339.0,1481.6 348.0,1316.2 278.6,1032.3 224.9,933.6 168.1,893.6 117.0,883.5 48.3,791.4 32.8,790.7 66.8,596.4 71.3,597.1 96.5,104.6 375.5,103.1 711.1,164.7 712.1,134.8 853.6,136.9 1270.5,138.4 1272.5,417.2 1272.2,703.6 1311.2,704.1 1307.2,957.5 1536.7,958.4 1535.0,1204.0 1507.2,1203.9 1472.4,1447.4 1474.4,1447.4 1457.0,1683.8 1454.4,1683.8 1404.6,1797.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1273.0,422.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14756226270092,43.142258744209016]}},{"type":"Feature","properties":{"resourceCoords":[1273.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.14763604816298,43.14325415081433]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p6","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1341.0,1852.2 742.8,1878.1 155.1,1838.1 115.8,1855.4 89.8,1699.2 88.5,1699.2 88.9,974.6 181.5,973.8 437.4,716.9 353.9,717.1 352.3,150.6 351.8,114.6 933.9,77.2 934.1,137.2 1482.0,187.0 1483.6,400.4 1483.7,712.9 1545.7,712.7 1521.1,965.8 1545.8,965.7 1529.9,1127.4 1520.2,1205.1 1509.0,1205.1 1485.8,1452.0 1498.2,1452.0 1474.3,1694.8 1483.6,1694.8 1453.3,1856.8 1341.0,1852.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[914.0,969.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.139011,43.140624]}},{"type":"Feature","properties":{"resourceCoords":[1492.0,1452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.135992,43.13896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p7 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.0,1852.1 380.8,1872.7 652.0,1832.9 1131.8,1845.5 1119.4,1658.3 1189.3,1313.1 1324.1,1304.3 1364.5,1262.5 1370.4,1181.0 1505.8,1164.8 1549.6,1074.8 1584.2,600.3 1571.2,62.7 1519.3,59.0 1454.8,24.4 1287.2,23.4 1286.5,20.7 1258.3,42.4 1256.0,111.0 1250.8,241.5 1250.2,255.0 428.5,188.2 128.6,178.7 125.4,382.5 118.0,698.0 180.6,699.2 149.7,954.2 174.7,954.6 154.7,1117.5 143.1,1195.8 131.8,1195.5 102.5,1444.2 114.9,1444.5 85.0,1689.0 94.4,1689.2 60.0,1852.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[85.0,1689.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.136021,43.138068]}},{"type":"Feature","properties":{"resourceCoords":[118.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.136216,43.141664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p8","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.0,1774.7 34.4,1350.2 107.8,448.7 103.2,123.5 87.6,114.2 441.7,87.6 442.1,76.4 714.3,77.5 842.2,75.2 1182.8,78.0 1446.8,76.3 1449.4,629.4 1449.4,912.6 1481.3,912.8 1478.0,1048.0 1464.8,1185.2 1464.1,1554.7 1463.1,1724.0 1462.4,1746.6 1178.2,1782.0 1178.4,1808.5 908.0,1809.0 495.1,1808.0 354.9,1805.9 354.0,1835.6 21.6,1774.9 52.0,1774.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[908.0,1809.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.1476518,43.1432961]}},{"type":"Feature","properties":{"resourceCoords":[911.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.147954,43.147653]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Iowa | 1946 | sanborn02833_007 p9","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:20:33Z","modified":"2026-10-18T23:20:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.0,113.6 104.0,138.6 646.0,97.0 646.0,102.5 917.0,103.0 917.0,115.0 1458.7,113.9 1458.8,382.4 1458.3,1223.5 1496.0,1223.4 1488.2,1618.8 1500.3,1620.5 1452.0,1856.3 1223.5,1835.0 1223.5,1775.4 646.1,1811.2 646.5,1846.9 375.7,1809.3 132.7,1770.7 90.7,1770.4 90.9,1764.0 91.5,1594.5 91.7,1224.6 104.7,1087.2 107.8,951.8 75.8,951.6 75.3,668.0 71.8,114.3 104.0,113.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028331946:02833_1946-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[917.0,952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.140896,43.146873]}},{"type":"Feature","properties":{"resourceCoords":[917.0,115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.141114,43.149962]}}]}}]}