{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01776_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Centralia, Illinois | 1916 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"25"},{"label":"placed","value":"17"},{"label":"unplaced","value":"8"},{"label":"fit sources","value":"georef-snap 9, georef 6, georef-street 1, snap:2 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 13 panels"},{"label":"unplaced pages","value":"p10__2 (tier 1, 38.52596,-89.13836 +/-100m); p15__1 (tier 4, 38.52967,-89.13407 +/-2116m); p1__1 (tier 1, 38.52551,-89.12667 +/-261m); p1__2 (tier 1, 38.52595,-89.12608 +/-131m); p2__2 (tier 1, 38.53211,-89.13734 +/-109m); p8__1 (tier 1, 38.52715,-89.13800 +/-100m); p9__1 (tier 1, 38.52621,-89.13398 +/-271m); p9__2 (tier 1, 38.52711,-89.13479 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p10 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.74"},{"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":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.2,323.0 157.6,625.2 160.4,922.5 156.6,1213.5 103.0,1212.3 102.3,1367.4 1.0,1347.1 1.0,1361.6 652.4,1496.5 673.5,1496.5 673.5,1500.9 1466.1,1665.0 1489.8,1648.0 1497.4,1646.3 1318.8,1566.6 1363.0,1230.5 1294.9,1230.0 1110.5,635.1 1096.8,634.7 1333.7,47.9 912.9,45.1 168.6,20.4 159.2,323.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[822.0,626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1387774,38.525858]}},{"type":"Feature","properties":{"resourceCoords":[822.0,42.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1402175,38.5261089]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p11","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1913.0 0.0,0.0 1613.0,0.0 1613.0,1913.0 0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[137.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1354236,38.5238638]}},{"type":"Feature","properties":{"resourceCoords":[1508.0,1745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1317255,38.5258656]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1380.3,1896.1 1368.5,1878.1 1527.0,1861.6 1569.5,1803.3 1561.2,79.7 233.8,46.7 141.1,127.2 139.2,531.1 76.6,705.1 108.4,928.2 29.9,987.0 30.7,1600.0 1.0,1608.0 1.0,1609.4 154.8,1784.7 731.1,1776.2 805.2,1780.5 798.9,1828.7 1380.3,1896.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[810.0,926.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1311996002756,38.53435322562291]}},{"type":"Feature","properties":{"resourceCoords":[810.0,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13122691986584,38.53273160194204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p13 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.80"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3264.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4388.0"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1113.0,1894.8 1391.3,1506.1 1335.7,1506.2 1344.8,1192.0 1314.6,1192.2 1447.9,1011.4 1447.8,1032.4 1605.7,883.8 1562.7,851.2 1217.3,845.4 1107.0,868.3 1107.0,875.0 762.0,875.0 628.8,877.1 86.8,877.5 71.2,876.6 69.2,1816.6 150.2,1813.2 387.4,1778.2 391.4,1777.2 403.8,1768.0 1151.5,1912.0 1198.7,1912.0 1113.0,1894.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1321038,38.5245792]}},{"type":"Feature","properties":{"resourceCoords":[1107.0,875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.1324848,38.5233239]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p13 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"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":"3264.0"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.8,97.3 37.4,97.4 64.0,192.0 33.0,311.7 23.2,643.2 64.1,812.9 769.9,792.3 1437.4,814.6 1542.5,800.5 1565.2,723.9 1536.2,61.2 1538.1,60.9 1188.0,61.7 1172.3,60.8 626.0,63.1 491.7,65.8 143.9,67.0 143.9,73.8 32.8,97.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[841.0,380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13026704527029,38.525565568505314]}},{"type":"Feature","properties":{"resourceCoords":[149.0,380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13103657088446,38.523070117269185]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p14","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.66"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1465.7,81.8 1539.6,132.0 1563.0,131.2 1561.8,293.8 1564.8,456.0 1570.2,615.5 1572.0,771.8 1543.2,771.8 1544.8,855.0 1489.7,845.4 1489.8,853.1 1514.4,857.6 1471.7,859.0 1559.0,875.7 1280.2,1273.3 1336.7,1272.7 1330.6,1591.8 1361.3,1591.4 1227.8,1776.3 1227.7,1755.0 1068.8,1907.6 1048.1,1892.2 48.4,1879.7 23.9,1172.2 73.2,929.7 37.9,787.5 49.9,546.6 19.2,271.1 46.3,45.4 864.8,12.2 999.0,20.4 1150.8,84.7 1465.8,67.5 1465.7,81.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1430003,38.5193889]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1411725,38.5251528]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.132435,38.5234568]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1342628,38.5176929]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p15 [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":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"993.9,1876.5 1129.0,1810.5 1194.0,1543.8 1194.0,1537.0 1195.7,1537.0 1197.2,1530.7 1540.6,1533.7 1589.7,1447.2 1573.8,131.1 1537.2,60.0 1466.2,103.8 1329.5,41.1 499.5,22.4 392.9,81.0 304.5,291.8 304.5,295.5 302.9,295.5 302.5,296.6 66.5,306.6 45.9,371.3 49.4,1859.2 993.9,1876.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1276.0,1520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.12828877776296,38.54725343919117]}},{"type":"Feature","properties":{"resourceCoords":[796.0,1514.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.12944592182687,38.54727563595904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p15 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.70"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4776.0"},{"label":"split_canvas_y","value":"6148.0"},{"label":"split_canvas_w","value":"1676.0"},{"label":"split_canvas_h","value":"1504.0"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1203.6,1898.8 1593.0,1907.1 1593.0,1893.0 1595.0,1892.9 1602.5,1658.5 1524.3,1644.0 1432.2,1565.6 1254.5,1558.0 1211.7,1586.2 1203.6,1898.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0015__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1194.0,1537.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13104058340387,38.54538600543068]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1537.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13002407210206,38.545388520294544]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13002118870763,38.54467456621149]}},{"type":"Feature","properties":{"resourceCoords":[1194.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13103770000944,38.544672051347625]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,1775.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13067,38.544935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p1 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.51"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4498.4"},{"label":"split_canvas_w","value":"2154.0"},{"label":"split_canvas_h","value":"1508.8"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"522.0,1192.4 257.6,1247.1 54.4,1197.5 16.6,1197.8 47.1,1497.2 246.3,1441.5 459.1,1470.9 522.0,1192.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1124.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1276716183443,38.524464608803456]}},{"type":"Feature","properties":{"resourceCoords":[538.5,1124.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1273656535124,38.525454245101024]}},{"type":"Feature","properties":{"resourceCoords":[538.5,1501.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.12648310211276,38.52528487912588]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1501.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.12678906694465,38.52429524282831]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p1 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.16"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5990.8"},{"label":"split_canvas_w","value":"2154.0"},{"label":"split_canvas_h","value":"1661.2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.0,1881.2 189.8,1836.8 450.3,1831.5 478.8,1599.6 258.6,1512.6 198.8,1588.2 33.4,1576.9 32.1,1900.7 226.1,1910.2 178.0,1881.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0001__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1497.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.12638152024002,38.52447861272985]}},{"type":"Feature","properties":{"resourceCoords":[538.5,1497.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.12630143748075,38.52549300806098]}},{"type":"Feature","properties":{"resourceCoords":[538.5,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1253058643555,38.52544422206054]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.12538594711476,38.52442982672942]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p2 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"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":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"20.4,1776.5 22.4,1832.6 517.4,1821.3 1597.2,1813.4 1586.5,1123.0 1580.4,885.4 1579.3,885.3 1578.6,885.3 1563.3,885.1 1300.8,886.3 1298.2,881.5 1294.4,881.4 1262.2,812.4 1189.8,673.1 1093.8,609.4 1081.6,87.5 680.1,26.4 86.2,71.0 14.7,460.4 43.7,1758.1 20.4,1776.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[617.0,789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13667958263827,38.532781501127]}},{"type":"Feature","properties":{"resourceCoords":[50.0,911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13809222214053,38.53281491314153]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"733.0,44.7 970.0,42.8 970.5,25.8 1531.1,49.1 1574.3,438.9 1427.7,636.1 1554.2,1185.6 1565.3,1257.3 1517.9,1261.2 1572.9,1831.1 1523.0,1881.5 20.4,1880.6 27.8,1262.2 29.9,952.7 34.6,648.8 42.1,395.7 44.7,43.5 733.0,44.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1302.0,52.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13425395507188,38.532777865290825]}},{"type":"Feature","properties":{"resourceCoords":[1555.0,1272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13120865522467,38.532729612396004]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p4","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.8,580.2 44.7,372.1 53.0,370.4 24.6,90.6 428.4,19.8 1127.2,65.8 1417.5,27.8 1531.7,68.4 1578.6,236.9 1599.2,1668.1 1612.0,1668.4 1612.0,1721.7 1479.8,1857.8 1030.5,1859.5 730.0,1857.0 29.2,1857.0 34.9,1331.2 43.7,1144.6 41.6,947.0 47.5,580.2 46.8,580.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[730.0,584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.142398,38.529155]}},{"type":"Feature","properties":{"resourceCoords":[730.0,1857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.139463,38.528618]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.0,1630.5 122.7,1451.3 124.3,1146.7 121.5,892.0 123.8,521.8 122.8,206.2 417.0,207.8 856.7,204.6 985.2,70.2 985.9,17.7 1399.4,26.1 1539.9,207.8 1483.4,209.3 1491.8,711.1 1493.2,1805.7 772.7,1808.9 466.6,1799.5 230.1,1803.0 123.0,1808.4 125.0,1630.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.14001361951443,38.52848255736201]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13911287737817,38.53145269092669]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13464152847226,38.53061110375987]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13554227060852,38.527640970195186]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"244.1,27.6 477.9,25.4 780.4,36.2 1492.3,36.7 1490.8,388.5 1484.2,641.3 1480.4,944.8 1479.2,1253.8 1473.9,1871.5 802.7,1872.5 124.6,1868.0 138.3,32.5 244.1,27.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[132.0,1848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13139212923952,38.52711637399503]}},{"type":"Feature","properties":{"resourceCoords":[132.0,50.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.13567964632672,38.5278941555772]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1533.6,58.6 1428.7,78.5 1049.3,15.8 101.9,27.0 53.0,69.1 35.6,447.2 32.5,1689.0 1.0,1690.6 1.0,1719.5 145.6,1818.5 191.5,1817.0 977.9,1825.2 1507.9,1816.5 1565.3,1817.5 1562.9,1293.9 1568.8,1107.9 1563.7,911.1 1563.8,545.9 1563.1,545.9 1557.8,338.7 1566.0,336.8 1533.6,58.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.14493051823824,38.52533050669475]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.1440056492227,38.528261588422275]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.13959323830322,38.52739742990882]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-89.14051810731875,38.52446634818129]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0008__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centralia, Illinois | 1916 | sanborn01776_006 p8 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"},{"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":"2026-10-24T14:55:19Z","modified":"2026-10-24T14:55:19Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0008__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"661.9,139.1 423.8,759.4 438.2,759.5 642.4,1380.8 714.0,1380.1 673.5,1733.8 1333.4,1743.1 1494.3,1735.8 1496.3,1558.0 1494.0,1379.0 1495.6,1074.7 1492.8,820.1 1495.0,450.2 1494.0,135.0 804.3,139.4 747.2,138.2 661.9,139.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g017761916:01776_1916-0008__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1494.0,1379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.136553,38.52807]}},{"type":"Feature","properties":{"resourceCoords":[1494.0,135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.139463,38.528618]}}]}}]}