{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01921_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Herrin, Illinois | 1941 | 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":"38"},{"label":"placed","value":"26"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef-snap 17, georef 9"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 21 panels"},{"label":"unplaced pages","value":"p17__3 (tier 2, 37.79563,-89.03016 +/-571m); p17__4 (tier 2, 37.79563,-89.03016 +/-571m); p23__1 (tier 3, 37.80451,-89.01045 +/-837m); p23__10 (tier 3, 37.80451,-89.01045 +/-837m); p23__2 (tier 3, 37.80451,-89.01045 +/-837m); p23__3 (tier 3, 37.80451,-89.01045 +/-837m); p23__4 (tier 3, 37.80451,-89.01045 +/-837m); p23__5 (tier 3, 37.80451,-89.01045 +/-837m); p23__6 (tier 3, 37.80451,-89.01045 +/-837m); p23__7 (tier 3, 37.80451,-89.01045 +/-837m); p23__8 (tier 3, 37.80451,-89.01045 +/-837m); p23__9 (tier 3, 37.80451,-89.01045 +/-837m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"346.0,1879.2 136.3,1882.2 137.8,1015.1 135.8,891.4 117.9,891.2 118.7,692.6 107.7,692.8 108.5,96.8 286.9,97.1 1113.8,94.7 1565.5,89.2 1588.5,89.2 1590.7,247.4 1586.7,410.6 1587.5,687.8 1564.1,931.1 1568.5,1340.0 1562.5,1878.5 1491.6,1880.2 556.8,1876.3 346.0,1879.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1051.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03239567124896,37.80215918561992]}},{"type":"Feature","properties":{"resourceCoords":[551.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03359588984773,37.80119840249787]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p11","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.4,1332.9 39.3,923.1 63.6,679.2 63.7,401.3 68.2,237.7 66.5,79.2 1091.3,78.5 1571.3,77.0 1563.1,916.6 1573.8,1339.0 1573.1,1866.2 1142.6,1871.1 1087.6,1869.8 563.4,1873.8 34.6,1872.8 42.4,1332.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0299462,37.8021111]}},{"type":"Feature","properties":{"resourceCoords":[567.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0299,37.804439]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p12","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1556.4,53.8 1551.6,109.2 1550.9,1017.0 1559.5,1833.7 1051.2,1832.8 1051.2,1838.8 72.9,1873.1 72.9,1836.2 72.0,1311.1 60.2,890.4 66.0,54.1 1556.4,53.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1044.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.025265,37.803389]}},{"type":"Feature","properties":{"resourceCoords":[540.0,1309.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0264849,37.80206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p13","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.1,1854.5 88.6,1032.1 85.0,118.0 89.5,62.1 601.0,59.5 1502.4,56.8 1504.3,578.0 1509.9,644.0 1511.0,720.3 1522.0,956.5 1545.6,1848.4 1568.3,1848.1 1503.0,1912.0 164.2,1912.0 106.4,1854.3 101.1,1854.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1059.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0218377,37.8020048]}},{"type":"Feature","properties":{"resourceCoords":[88.0,795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.024079,37.803005]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p14","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"924.0,1827.0 924.0,1836.0 261.2,1832.4 221.2,820.2 221.2,802.6 200.5,803.1 232.1,86.0 419.0,83.0 1359.7,85.2 1431.0,83.3 1442.6,794.0 1445.6,1384.3 1440.5,1566.3 1443.5,1824.6 924.0,1827.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[419.0,83.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0335829,37.8011717]}},{"type":"Feature","properties":{"resourceCoords":[924.0,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0324912,37.7979314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.3,1540.5 48.5,1358.8 45.9,769.6 34.8,60.3 564.5,58.9 1089.7,52.5 1144.8,53.5 1576.1,46.6 1577.0,567.9 1579.5,1792.0 46.0,1798.3 43.3,1540.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1104.0,674.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02874509812511,37.79995376843128]}},{"type":"Feature","properties":{"resourceCoords":[58.0,762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0311982758471,37.79983159072405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"82.4,602.2 90.0,123.2 1064.4,104.4 1064.4,98.4 1570.4,107.2 1575.6,107.2 1612.0,145.0 1612.0,1741.5 1523.8,1833.3 63.9,1813.7 82.4,602.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1055.0,1241.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.025337,37.798931]}},{"type":"Feature","properties":{"resourceCoords":[1055.0,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.025342,37.7978355]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p17 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.1,948.3 221.8,923.2 354.5,958.1 916.5,943.0 953.6,975.6 1031.5,1290.5 1030.1,1727.7 1046.8,1794.2 1238.9,1808.3 1238.9,1822.5 1486.1,1815.6 1485.4,1658.2 1483.5,1393.8 1479.1,1167.8 1482.7,912.0 1483.3,647.0 1483.0,418.3 1483.7,155.4 711.0,153.0 449.8,152.1 449.7,156.7 116.4,152.2 132.3,654.6 112.3,654.4 105.0,654.6 144.1,948.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1242.0,1174.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02887507327424,37.79413931122432]}},{"type":"Feature","properties":{"resourceCoords":[1242.0,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02881009898526,37.79787353790203]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p17 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3846.0"},{"label":"split_canvas_w","value":"3746.0"},{"label":"split_canvas_h","value":"3806.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,990.7 1.0,991.2 29.1,1007.6 23.1,1390.2 73.3,1432.9 202.1,1411.1 290.4,1432.1 303.2,1431.8 303.3,1435.2 306.0,1435.8 360.2,1610.8 360.6,1746.7 328.6,1825.4 375.2,1868.2 486.3,1892.9 496.9,1864.2 550.7,1882.0 579.2,1856.8 847.7,1841.8 897.9,1863.0 912.1,1838.0 926.9,1180.8 919.1,1180.7 921.1,1123.9 853.8,1123.6 731.8,1119.2 655.0,1118.0 655.4,1084.2 425.8,993.6 425.6,1015.9 184.7,1020.0 184.8,1006.2 1.0,990.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0017__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[418.2,1372.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02782205557091,37.7904263929158]}},{"type":"Feature","properties":{"resourceCoords":[911.5,1595.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02547250194625,37.78957988865973]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p18 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"281.8,1814.5 281.7,1849.5 361.1,1850.0 487.4,1853.4 557.1,1853.1 555.5,1912.0 563.6,1912.0 565.8,1573.5 732.3,1573.5 1535.1,1570.1 1568.9,1299.3 1553.0,899.4 1583.0,617.5 1596.8,619.9 1594.4,565.5 1596.0,449.1 1594.3,342.6 1596.0,170.5 1507.5,60.4 1508.5,1.0 838.7,1.0 838.9,27.7 793.5,75.7 44.0,71.9 42.8,336.9 42.7,567.5 41.5,834.8 37.5,1092.7 41.5,1320.5 42.9,1587.1 43.3,1722.7 281.8,1814.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[818.0,829.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02416140147474,37.79507630353966]}},{"type":"Feature","properties":{"resourceCoords":[287.0,1577.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02664956398726,37.792375299895106]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p18 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.50"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2255.2"},{"label":"split_canvas_y","value":"6294.0"},{"label":"split_canvas_w","value":"4196.8"},{"label":"split_canvas_h","value":"1358.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"601.9,1873.6 756.9,1901.8 1045.3,1851.9 1380.0,1894.2 1537.7,1882.7 1583.8,1844.3 1583.9,1629.0 1349.2,1613.7 1349.8,1589.3 1141.5,1589.2 1076.8,1587.4 847.0,1586.0 602.8,1585.9 603.3,1696.5 600.1,1817.2 601.9,1873.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[856.6,1827.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0194304766498,37.795967482354804]}},{"type":"Feature","properties":{"resourceCoords":[856.6,1597.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.01943064606176,37.79677358467399]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p19 [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":"2961.2"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"590.2,1876.8 593.4,1912.0 594.8,1912.0 596.7,1912.0 596.2,1871.5 722.3,1846.6 737.4,1675.1 735.6,678.1 703.3,552.2 693.6,80.0 413.7,41.0 79.7,68.8 41.2,314.7 8.3,315.3 19.9,582.0 27.9,845.9 36.7,977.5 43.0,1160.5 40.2,1384.8 43.9,1499.4 43.1,1612.8 43.1,1875.4 588.0,1895.2 590.2,1876.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[313.1,1113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.01944459641975,37.80609811711915]}},{"type":"Feature","properties":{"resourceCoords":[313.1,1866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.01951514428617,37.803367832529524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p19 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.03"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2961.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3490.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"833.4,1706.9 834.7,1884.2 1076.8,1877.3 1304.7,1872.1 1368.9,1872.0 1575.5,1866.2 1573.1,1405.5 1537.4,1093.4 1356.9,1056.6 1356.0,1054.0 1353.0,1054.0 1352.8,1054.0 1352.8,1044.5 1323.5,958.3 1305.2,68.8 1301.7,68.8 1299.8,1.0 1298.7,1.0 1298.2,32.8 1296.0,51.6 740.3,36.1 740.3,73.5 740.3,85.0 740.3,96.7 741.1,113.4 747.4,236.9 762.0,703.2 773.8,703.0 740.3,736.1 740.3,1059.7 740.3,1595.0 833.4,1706.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1292.1,1267.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.01843147863711,37.79894812459347]}},{"type":"Feature","properties":{"resourceCoords":[1292.1,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.01827555012088,37.80322293426054]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p19 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"5412.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1040.0"},{"label":"split_canvas_h","value":"4216.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1528.2,70.2 1473.2,44.6 1390.8,55.7 1389.3,1010.9 1520.0,1025.7 1519.3,919.0 1519.1,767.0 1513.0,540.5 1517.3,368.5 1514.5,127.5 1523.0,127.7 1528.2,70.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0019__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1513.0,377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03116237318832,37.8100756825174]}},{"type":"Feature","properties":{"resourceCoords":[1513.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0311640231574,37.8109399826476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p2","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1731.0 1609.2,1731.0 1586.7,1270.9 1611.9,1248.2 1591.7,1175.0 1609.5,710.1 1520.2,85.8 1426.8,32.9 1313.0,50.5 1061.7,23.6 354.3,26.5 299.3,38.9 285.4,72.5 79.2,77.6 79.3,674.6 41.4,778.8 28.5,1000.2 50.3,1725.8 1.0,1728.8 1.0,1744.5 370.7,1772.5 465.1,1772.9 1207.9,1762.0 1567.5,1756.4 1612.0,1736.8 1612.0,1731.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1198.0,1494.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.024124,37.811881]}},{"type":"Feature","properties":{"resourceCoords":[675.0,750.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.026461,37.814652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.3,705.7 56.5,470.9 49.3,470.9 40.2,226.8 38.3,226.8 50.6,59.4 881.3,26.0 1258.9,61.5 1443.3,33.1 1499.8,66.0 1502.4,192.1 1511.6,457.5 1511.0,950.0 1544.9,950.3 1542.7,1253.8 1548.3,1253.7 1547.3,1354.8 1556.4,1355.0 1557.0,1418.0 1553.5,1859.6 1439.0,1859.2 1437.3,1787.2 991.0,1792.1 787.2,1795.2 674.3,1792.4 413.4,1793.0 329.2,1792.2 329.8,1834.5 163.3,1898.2 71.8,1791.8 70.3,1735.2 53.6,1735.7 45.5,1473.7 64.3,1473.8 60.5,1213.2 58.5,954.0 58.3,705.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1430.0,1586.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03512528307992,37.80218047500916]}},{"type":"Feature","properties":{"resourceCoords":[70.0,953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.04136589690522,37.80455799156451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p21","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"37"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"100.0,1086.2 95.2,801.6 89.9,690.8 86.5,565.6 75.0,566.0 65.0,313.1 108.3,311.5 25.8,215.1 192.2,151.9 191.8,109.7 276.0,110.6 536.6,110.7 649.4,113.8 853.0,111.2 1299.1,107.4 1300.6,179.4 1415.0,180.0 1521.7,179.4 1534.5,179.3 1514.7,541.7 1525.2,541.6 1525.0,550.5 1554.7,1567.7 1534.6,1567.4 1527.2,1567.6 1565.8,1863.0 1500.4,1883.9 1193.8,1883.6 1112.2,1855.0 44.9,1874.3 21.8,1789.7 68.9,1379.1 65.6,1086.1 100.0,1086.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1415.0,180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.034572,37.801176]}},{"type":"Feature","properties":{"resourceCoords":[323.0,563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.039639,37.799822]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p22 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"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":"3410.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"820.6,928.1 816.3,928.2 804.8,103.7 745.9,70.6 517.8,48.6 116.7,59.9 61.5,144.6 36.0,439.1 36.8,1815.8 44.1,1874.7 267.4,1881.9 266.0,1817.6 566.8,1819.0 677.2,1820.7 816.9,1819.0 819.9,1571.7 821.1,1337.8 814.0,1337.8 808.1,1094.7 806.2,1094.6 820.6,928.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[566.8,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0425774,37.8072159]}},{"type":"Feature","properties":{"resourceCoords":[566.8,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0425793,37.8045553]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p22 [2]","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3410.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3041.2"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"897.1,129.3 898.4,129.3 913.2,694.7 891.2,786.5 924.2,834.2 924.2,1003.1 898.6,1006.8 891.4,1697.0 917.1,1704.4 924.5,1847.5 964.8,1858.5 1566.4,1865.8 1566.4,1871.8 1600.5,1872.4 1599.0,1589.4 1594.8,1479.2 1592.9,1354.8 1581.4,1355.1 1574.3,1103.5 1612.0,1102.5 1612.0,1096.2 1447.0,898.9 1446.2,842.6 1429.7,842.9 1425.2,582.6 1443.8,583.0 1443.5,324.1 1445.0,66.7 1305.7,68.4 1195.7,66.7 895.8,65.2 897.1,129.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1193.4,323.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0425902,37.8036135]}},{"type":"Feature","properties":{"resourceCoords":[1380.2,1869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0417224,37.7979329]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.6,72.7 660.5,55.2 659.6,86.2 1394.2,161.4 1581.5,167.2 1564.8,407.6 1562.9,558.4 1583.3,1679.5 1585.3,1876.9 1096.9,1876.6 1096.9,1879.0 576.7,1848.5 576.8,1859.7 47.1,1877.8 45.7,1685.2 45.3,1388.5 33.6,945.9 42.0,610.0 36.6,139.3 53.2,139.5 63.3,27.4 160.6,72.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1097.0,1146.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02867884685129,37.80912119533567]}},{"type":"Feature","properties":{"resourceCoords":[47.0,627.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03113099247452,37.81007491816103]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.5,1616.8 33.3,498.5 35.1,348.1 51.6,108.3 1523.2,124.8 1536.3,399.2 1549.8,1118.2 1546.3,1643.0 1547.6,1687.5 1549.6,1851.2 1039.0,1831.8 1038.8,1825.6 529.9,1822.6 529.7,1813.7 57.2,1869.6 54.5,1616.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1535.0,1114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0240795371554,37.80907078215453]}},{"type":"Feature","properties":{"resourceCoords":[1023.0,109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02527941799208,37.81092747837689]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.1,1645.5 60.0,1601.1 64.4,1078.4 52.5,362.1 40.0,88.8 749.7,97.4 838.5,61.2 838.9,49.7 1494.9,51.5 1566.0,633.4 1610.3,630.8 1524.0,1109.6 1459.8,1109.3 1470.2,1631.1 1472.2,1904.2 1021.1,1849.0 63.1,1830.3 61.1,1645.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1017.0,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02180790322126,37.8090409735636]}},{"type":"Feature","properties":{"resourceCoords":[61.0,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02405299165343,37.80903586930291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.2,1834.8 41.2,855.0 27.1,326.9 24.1,75.9 59.8,97.0 280.0,29.6 1271.7,31.1 1566.5,58.4 1569.2,248.9 1579.9,469.1 1585.2,866.5 1580.7,1404.6 1575.7,1849.0 1118.0,1848.2 280.4,1838.7 32.2,1834.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03347522042405,37.80627592060371]}},{"type":"Feature","properties":{"resourceCoords":[1069.0,862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03229123852093,37.806270621030755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.8,1866.7 52.9,1428.8 55.0,898.6 48.2,507.1 36.7,290.1 33.0,86.6 557.4,62.6 557.1,51.6 1072.7,75.9 1072.6,73.5 1556.2,68.2 1563.2,393.2 1578.0,1437.1 1571.0,1874.7 1093.1,1873.0 72.7,1867.0 49.8,1866.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[584.0,904.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02984690341361,37.806237191164435]}},{"type":"Feature","properties":{"resourceCoords":[71.0,1427.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.03106777309925,37.805273079384456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.9,1449.1 65.5,409.3 60.1,140.8 526.9,81.2 527.2,90.0 1030.5,88.1 1030.8,94.3 1536.0,108.7 1539.0,247.3 1542.0,417.1 1558.3,863.5 1561.8,1117.8 1556.7,1460.9 1558.4,1851.4 1555.4,1900.6 71.4,1885.0 78.9,1449.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1547.0,930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0240342932757,37.806173073714035]}},{"type":"Feature","properties":{"resourceCoords":[546.0,1881.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02642134537861,37.80441184101191]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Herrin, Illinois | 1941 | sanborn01921_006 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:07:34Z","modified":"2026-10-19T19:07:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.8,1832.5 90.0,1435.2 94.3,1086.0 90.0,827.2 72.2,373.0 68.6,200.3 65.7,81.1 1033.7,86.3 1490.2,135.6 1495.4,380.9 1510.3,640.9 1519.5,1002.4 1510.0,1445.2 1515.0,1671.6 1511.4,1895.5 604.5,1886.6 89.9,1882.6 92.8,1832.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104hm:g019211941:01921_1941-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1508.0,911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.02071238065773,37.8061139902404]}},{"type":"Feature","properties":{"resourceCoords":[87.0,911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.0240153934403,37.80614341622614]}}]}}]}