{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08643_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Marshall, Texas | 1899 | 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":"26"},{"label":"placed","value":"19"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef-snap 13, georef 6"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"7 sheet(s) cut into 16 panels"},{"label":"unplaced pages","value":"p12__2 (tier 1, 32.54540,-94.36381 +/-100m); p16__1 (tier 1, 32.55413,-94.36521 +/-140m); p16__2 (tier 1, 32.55351,-94.36429 +/-113m); p16__3 (tier 1, 32.55472,-94.36463 +/-199m); p18__2 (tier 1, 32.54473,-94.37607 +/-100m); p18__3 (tier 1, 32.54192,-94.37260 +/-152m); p2__2 (tier 1, 32.54904,-94.37122 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"113.5,508.9 112.7,1673.3 112.0,1834.4 1477.9,1842.2 1476.0,1391.8 1481.9,509.9 1483.2,120.0 1502.2,32.1 952.9,24.3 929.3,1.0 528.5,1.0 546.9,23.4 113.9,24.8 113.5,508.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1002.0,941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3643187766682,32.546729282111485]}},{"type":"Feature","properties":{"resourceCoords":[1002.0,1385.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3643154620963,32.545888286774975]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.2,162.7 119.1,46.1 1497.0,45.5 1530.2,98.4 1535.8,940.6 1537.0,1735.3 1530.8,1821.8 1502.6,1861.5 121.6,1873.0 119.2,178.2 119.2,162.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[562.0,64.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36532551753898,32.54499542980206]}},{"type":"Feature","properties":{"resourceCoords":[121.0,953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36631343611832,32.543328476321285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p12 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.5,1886.0 758.9,1879.1 873.6,1799.4 849.5,1288.5 913.9,1223.5 1374.5,1228.3 1377.0,1232.5 1450.8,1232.5 1531.2,967.9 1504.7,967.8 1543.6,517.1 1591.6,516.9 1545.4,61.4 1167.7,46.9 978.5,46.9 669.1,67.2 95.9,67.0 129.2,120.0 136.8,963.6 139.6,1759.6 133.6,1846.2 105.5,1886.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1176.0,966.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3608508,32.5433299]}},{"type":"Feature","properties":{"resourceCoords":[1176.0,518.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3608458,32.5441697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.9,1414.5 118.0,524.8 118.9,131.4 137.9,42.7 1556.5,46.1 1554.9,517.1 1549.3,954.5 1552.5,1467.9 1584.6,1469.1 1578.4,1874.6 1185.5,1856.6 996.6,1855.2 687.6,1873.3 115.3,1868.9 112.9,1414.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1101.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36105182072959,32.546728437546285]}},{"type":"Feature","properties":{"resourceCoords":[1101.0,51.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36105651939049,32.54844257014362]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"348.0,1813.0 749.5,1813.8 749.6,1781.9 1186.8,1774.1 1612.0,1770.0 1612.0,1730.1 1612.0,1701.0 1608.2,1702.0 1543.2,711.8 1593.3,474.9 1498.2,1.1 1480.9,1.0 1340.8,1.0 1341.2,72.3 458.9,51.9 459.0,6.2 22.0,3.0 17.7,439.9 22.2,952.5 54.4,953.7 49.3,1358.7 33.4,1358.0 77.4,1812.4 348.0,1813.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.0,1371.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.35840547344827,32.54499704902606]}},{"type":"Feature","properties":{"resourceCoords":[295.0,1371.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.35943581643095,32.54499745702151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p15 [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":"3967.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3684.8"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1513.8,1882.7 1430.9,1882.3 1431.2,1546.5 1431.8,1055.3 993.7,1063.0 993.6,1094.8 591.2,1093.9 272.1,1093.1 230.9,1542.8 257.5,1543.2 175.8,1806.9 102.1,1806.5 164.3,1910.1 1465.9,1910.0 1512.5,1883.5 1513.8,1882.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[989.0,1539.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.35843291102805,32.54333003839059]}},{"type":"Feature","properties":{"resourceCoords":[1438.0,1539.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.35743366451884,32.54332997935652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p15 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"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":"3967.2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.7,149.9 70.1,649.4 71.0,990.8 115.4,990.8 155.4,990.8 208.8,960.0 771.3,928.5 1421.6,947.7 1560.1,866.8 1520.6,129.2 709.1,22.9 501.3,74.0 501.6,144.2 68.7,149.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0015__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[518.0,646.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3564676,32.5433177]}},{"type":"Feature","properties":{"resourceCoords":[518.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3564631,32.5442464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p17","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.7,1856.6 290.9,1873.7 384.4,1814.8 666.5,1804.5 804.7,1868.2 1224.0,1827.5 1535.8,1889.2 1544.0,1912.0 1547.9,1912.0 1549.1,1912.0 1554.0,1645.5 1526.8,1647.0 1550.3,875.6 1552.6,875.7 1550.3,267.8 1542.0,267.9 1469.9,1.0 1459.6,1.0 1443.6,59.4 111.7,23.1 40.2,103.5 26.9,98.7 53.4,287.6 77.2,287.4 42.0,864.5 46.5,864.5 84.5,1288.7 74.8,1288.8 67.7,1856.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[331.0,1285.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3753204,32.5456731]}},{"type":"Feature","properties":{"resourceCoords":[1354.0,871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3730482,32.5464242]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p18 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.61"},{"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":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1552.4,1861.3 1564.2,1290.0 1574.0,1289.9 1539.1,862.6 1534.6,862.6 1574.7,282.0 1550.7,282.1 1525.5,91.7 1363.9,31.6 1269.5,133.8 1029.2,134.5 963.5,69.2 504.7,106.9 439.0,48.8 191.3,34.9 67.6,64.4 62.4,800.0 120.6,763.4 128.1,829.0 375.7,828.2 448.7,893.6 478.9,1301.3 1272.8,1321.0 1273.8,1326.8 1275.1,1326.8 1275.2,1334.5 1361.7,1845.1 1552.4,1861.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[835.0,283.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.377483,32.54754]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,1291.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3762126,32.5456699]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p2 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"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":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1373.4,86.7 1329.6,137.7 680.0,217.6 621.5,429.2 613.8,1144.4 611.2,1144.6 611.3,1149.6 531.6,1150.7 44.5,1187.8 73.3,1837.4 1.0,1836.8 1.0,1859.3 257.2,1859.2 704.4,1856.3 704.3,1890.8 1150.1,1888.1 1607.0,1885.3 1596.3,1756.0 1588.0,1439.0 1578.8,408.2 1573.4,408.4 1587.7,160.4 1373.4,86.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1048.0,425.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36855076874598,32.55110024036674]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,1137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36738538755998,32.549784810764194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p3 [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":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"595.9,1841.2 595.7,1813.4 923.3,1810.5 923.3,764.5 1399.8,764.5 1399.8,758.6 1444.8,758.2 1467.4,496.6 1560.8,316.0 1509.9,142.9 1214.2,215.8 817.0,123.0 138.8,146.2 119.8,139.7 106.4,385.0 111.8,384.7 124.0,1403.9 133.1,1717.4 144.1,1845.2 595.9,1841.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36635590917804,32.548493530838755]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36441324865098,32.548489595502595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p3 [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":"3693.2"},{"label":"split_canvas_y","value":"3058.0"},{"label":"split_canvas_w","value":"2758.8"},{"label":"split_canvas_h","value":"4594.0"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"961.4,1809.7 1515.5,1818.4 1538.2,1725.4 1538.7,1197.0 1535.2,808.8 1458.0,808.5 1458.0,815.4 962.2,827.4 968.1,764.5 923.3,764.5 923.3,1271.1 923.3,1771.9 961.4,1809.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[994.3,1207.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36436938703608,32.54959652559146]}},{"type":"Feature","properties":{"resourceCoords":[994.3,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36436295497855,32.548496764177976]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1224.4"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"6427.6"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.1,1772.1 1548.2,1780.1 1554.5,1321.5 1552.3,1259.0 1546.7,647.0 1525.0,647.0 1517.1,675.5 1198.8,652.0 724.2,462.1 63.9,356.3 61.8,754.7 139.5,755.0 142.8,1146.1 142.0,1678.4 119.1,1772.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1099.0,1143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36104296135746,32.549636318094194]}},{"type":"Feature","properties":{"resourceCoords":[1099.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3610353029793,32.54845482696061]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p4 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"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":"2588.0"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1168.8,603.4 1561.2,565.6 1552.0,187.4 1265.8,39.1 330.8,51.2 74.8,238.2 339.5,350.9 868.2,440.9 1168.8,603.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[704.0,194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36340937376868,32.555163487194335]}},{"type":"Feature","properties":{"resourceCoords":[1562.0,194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36341964105165,32.55354189228509]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"80.5,764.7 77.8,702.3 67.2,89.1 45.5,89.3 59.4,38.1 965.8,79.3 1408.0,27.4 1509.8,128.7 1510.4,389.7 1590.4,498.2 1512.6,1259.8 1570.9,1368.4 1564.4,1665.7 1570.2,1694.4 1411.0,1693.6 1411.7,1766.6 520.1,1747.8 520.1,1701.6 78.5,1699.3 77.9,1224.1 80.5,764.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[948.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3581214892485,32.548468359255644]}},{"type":"Feature","properties":{"resourceCoords":[75.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36004832385011,32.54847247405989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p6","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"23.8,271.2 14.1,271.1 84.6,30.1 873.5,41.5 873.5,63.7 1135.1,65.1 1572.4,64.6 1568.8,547.0 1559.1,1875.0 668.0,1873.0 52.5,1896.6 88.5,1136.2 90.8,1136.2 98.8,536.7 90.6,536.6 23.8,271.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[668.0,987.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3713172,32.5467004]}},{"type":"Feature","properties":{"resourceCoords":[668.0,1873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3713048,32.5450259]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.5,349.6 59.9,85.2 651.9,55.8 1548.2,47.7 1545.9,944.0 1523.4,944.2 1567.4,1877.3 1046.3,1887.0 119.6,1798.3 37.7,1217.2 106.0,513.2 48.4,349.5 53.5,349.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1107.0,947.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3703003,32.5433472]}},{"type":"Feature","properties":{"resourceCoords":[1547.0,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3693146,32.5441829]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"113.9,945.0 136.4,944.9 138.8,49.2 582.2,45.2 582.2,41.5 1481.8,175.2 1487.8,1867.5 390.2,1879.1 157.9,1877.4 113.9,945.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1027.0,948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3673355597831,32.543334317130245]}},{"type":"Feature","properties":{"resourceCoords":[1027.0,1397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36734056621606,32.54249001935226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marshall, Texas | 1899 | sanborn08643_004 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T20:29:53Z","modified":"2026-10-19T20:29:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.6,451.0 123.3,1786.0 566.8,1787.2 566.8,1783.4 1368.1,1912.0 1465.1,1912.0 1466.0,1795.6 1467.3,1633.2 1472.1,460.1 1473.9,1.0 137.1,1.0 133.6,451.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034mm:g4034mm_g086431899:08643_1899-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1019.0,458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36732880665546,32.54754047224126]}},{"type":"Feature","properties":{"resourceCoords":[1019.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.36731583646903,32.54589172978595]}}]}}]}