{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08703_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Arthur, Texas | 1918 | mapsnap generated fit (2026-10-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-20"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"32"},{"label":"placed","value":"22"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 14, georef-snap 7, snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p20__1 (tier 4, 29.87733,-93.93620 +/-2220m); p20__2 (tier 4, 29.87733,-93.93620 +/-2220m); p21__1 (tier 1, 29.88519,-93.93506 +/-372m); p21__2 (tier 1, 29.86052,-93.93673 +/-170m); p21__3 (tier 1, 29.88502,-93.93583 +/-235m); p21__4 (tier 1, 29.88495,-93.93407 +/-171m); p21__5 (tier 1, 29.88609,-93.93429 +/-231m); p3__2 (tier 1, 29.88080,-93.93737 +/-154m); p6__4 (tier 1, 29.87590,-93.94972 +/-326m); p8__2 (tier 1, 29.87012,-93.93481 +/-164m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1472.5,1547.8 1464.0,1548.0 1444.7,1792.5 1323.8,1765.1 336.9,1875.8 117.0,1817.5 109.4,1540.5 95.2,1540.3 140.4,1201.4 159.3,1201.7 154.3,630.2 161.3,630.3 145.7,84.7 156.1,84.7 1480.6,102.6 1475.0,1216.0 1472.5,1547.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[947.0,643.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.938959,29.870429]}},{"type":"Feature","properties":{"resourceCoords":[1475.0,1216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.93884,29.868982]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.2,1571.8 141.9,1571.5 141.7,1449.4 141.4,1233.6 136.7,99.5 403.8,101.7 1003.7,102.0 1258.2,105.6 1309.8,107.9 1485.0,106.5 1529.8,1238.0 1516.1,1237.9 1504.2,1899.0 1456.7,1840.5 361.9,1874.4 115.9,1821.0 133.2,1571.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[702.0,1232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9379209,29.8683379]}},{"type":"Feature","properties":{"resourceCoords":[139.0,656.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.938076,29.869804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p12","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.16"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.0,1190.5 103.9,1191.1 105.5,120.6 215.6,124.2 592.1,139.7 646.3,137.3 684.5,112.3 1366.3,122.0 1368.4,64.5 1466.2,113.6 1540.2,84.4 1485.2,395.5 1574.0,642.7 1592.8,1717.2 1535.2,1873.4 690.9,1885.8 209.5,1870.9 70.0,1835.7 54.2,1814.5 91.0,1190.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[708.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.935533,29.866633]}},{"type":"Feature","properties":{"resourceCoords":[708.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.934036,29.868371]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p13","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"37"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"31.8,1249.0 31.0,976.0 29.1,701.2 27.5,428.8 25.8,286.6 26.1,114.7 292.9,114.3 558.8,114.7 825.5,114.9 1091.5,115.8 1225.4,115.1 1372.2,115.8 1372.2,127.7 1612.0,162.8 1612.0,204.5 1581.9,229.1 1603.5,1008.9 1571.2,1682.4 1612.0,1759.4 1612.0,1763.1 1612.0,1776.6 1374.4,1836.8 1374.1,1800.4 1228.2,1798.5 1097.9,1798.7 832.3,1797.0 697.2,1796.9 300.4,1798.3 34.0,1796.2 31.8,1249.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[829.0,976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.93159,29.878323]}},{"type":"Feature","properties":{"resourceCoords":[31.0,976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.934237,29.880195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p14","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1232.7,1810.2 991.3,1774.2 991.3,1762.2 843.5,1761.2 708.7,1761.6 440.8,1760.0 172.2,1759.2 52.4,1758.8 46.7,1486.3 51.4,1486.3 32.2,1214.2 37.6,1214.2 37.0,936.5 35.7,936.5 33.3,659.6 36.8,659.6 35.4,385.1 46.1,385.2 25.2,107.2 35.0,107.0 305.8,109.5 989.5,111.6 989.5,77.2 1492.6,159.9 1494.6,89.3 1534.2,183.5 1525.3,294.5 1425.7,502.7 1409.6,657.1 1517.3,847.9 1554.5,1416.4 1523.2,1592.7 1579.8,1674.1 1592.5,1776.9 1575.3,1842.7 1523.4,1866.0 1388.0,1867.5 1276.1,1816.8 1232.6,1852.2 1232.7,1810.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[990.0,662.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.924518,29.882674]}},{"type":"Feature","properties":{"resourceCoords":[990.0,388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.923784,29.883458]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p15","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"34"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"25.2,1787.3 23.7,1511.9 22.5,668.0 27.0,668.0 21.8,413.2 18.5,413.2 17.3,140.5 1375.8,140.0 1375.9,134.8 1554.6,30.5 1556.2,32.6 1559.9,152.1 1593.8,176.2 1611.9,1089.5 1586.4,1242.3 1578.5,1687.0 1610.0,1761.0 1608.3,1831.3 1107.0,1751.3 1107.2,1785.5 426.5,1786.5 156.9,1785.3 25.2,1787.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[823.0,963.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9217584,29.8872716]}},{"type":"Feature","properties":{"resourceCoords":[1101.0,688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9200963,29.8874068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"227.7,37.4 396.9,38.0 397.1,68.3 666.8,82.2 666.7,38.2 1112.1,39.8 1518.4,39.8 1520.6,594.5 1535.3,594.6 1549.8,867.3 1520.2,867.1 1521.8,1147.0 1525.0,1711.7 1516.7,1711.7 1472.5,1884.2 1418.8,1881.1 800.3,1896.6 134.5,1878.4 134.5,1876.8 126.8,1706.4 127.9,1554.9 124.7,1142.1 120.2,312.4 119.2,35.3 227.7,37.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[665.0,1147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94455392549317,29.875699865123227]}},{"type":"Feature","properties":{"resourceCoords":[955.0,37.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94063571379867,29.878183032499738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1051.4,26.2 1132.7,23.2 1281.0,26.8 1498.4,27.1 1584.7,25.2 1585.7,303.6 1590.6,1136.7 1594.0,1551.3 1592.9,1703.4 1600.8,1874.5 1542.3,1874.6 1421.3,1871.3 1264.6,1837.1 826.2,1889.8 92.3,1878.5 36.3,1809.8 14.6,1479.5 64.8,1009.5 51.0,420.1 79.7,344.3 42.8,293.3 94.3,251.3 78.7,68.6 408.1,23.4 811.8,61.4 847.6,26.0 1051.4,26.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[785.0,1411.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94967173656859,29.87805060815803]}},{"type":"Feature","properties":{"resourceCoords":[1320.0,1137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94719600402057,29.877590393288042]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.37"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.3,1890.4 32.8,1866.3 34.0,1757.6 73.6,1678.6 51.8,1640.2 86.2,1560.7 42.8,1385.4 58.4,1288.5 22.6,1041.4 56.0,415.2 38.4,289.1 71.7,51.5 97.8,25.6 1346.2,13.1 1547.5,46.2 1602.3,647.6 1565.7,1037.7 1602.0,1448.1 1577.5,1870.5 697.9,1901.7 118.3,1890.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.95363382846743,29.876822353574514]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.94830991561433,29.873046052981312]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.95343863498834,29.867532268796253]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.95876254784145,29.871308569389456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p19","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.1,898.9 47.1,537.3 80.7,207.1 47.9,68.2 241.0,14.9 507.3,10.8 1061.7,17.8 1347.5,78.2 1393.6,111.5 1522.9,96.0 1574.6,176.9 1598.4,583.3 1560.6,1825.3 1448.4,1826.9 1378.9,1869.3 1300.0,1824.8 1150.4,1809.6 1115.7,1767.0 960.9,1751.2 881.4,1763.9 700.9,1873.2 272.0,1886.9 216.3,1870.8 212.0,1836.5 93.3,1824.4 229.0,1694.8 217.8,1599.9 150.6,1517.5 176.8,1439.3 94.5,1326.7 111.6,1260.7 65.3,1203.8 51.8,1106.0 91.1,898.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1050.0,959.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.944482,29.867648]}},{"type":"Feature","properties":{"resourceCoords":[981.0,1493.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.942911,29.86621]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p2","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"697.4,1784.7 429.1,1785.0 162.7,1782.6 162.2,1504.7 191.7,1504.9 178.3,1234.0 163.7,1233.9 163.7,682.9 161.4,408.6 163.4,128.4 294.8,132.2 429.2,133.8 697.0,137.0 1095.8,137.2 1231.6,137.8 1498.5,140.7 1498.7,963.9 1497.8,1788.6 830.0,1784.0 697.4,1784.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[697.0,961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.937775,29.874832]}},{"type":"Feature","properties":{"resourceCoords":[697.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.935568,29.877198]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p3 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"49"},{"label":"confidence","value":"0.99"},{"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":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"212.6,1765.4 212.8,1795.3 479.5,1808.6 479.3,1765.1 919.5,1765.8 1321.1,1765.2 1317.2,1492.2 1317.6,1213.4 1448.3,1216.4 1582.2,1217.2 1579.0,670.0 1577.8,397.0 1575.3,122.2 1441.3,121.5 1044.6,124.0 780.6,123.5 467.8,125.4 424.6,123.3 202.4,123.9 61.4,122.4 32.2,198.5 52.8,562.2 23.9,877.0 49.8,1212.8 61.4,1219.9 73.6,1220.0 98.3,1219.9 208.6,1404.5 209.1,1490.3 212.6,1765.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94026,29.881846]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.934973,29.879408]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p4","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.0,132.0 327.9,131.3 622.2,135.0 622.7,208.4 1102.0,86.7 1102.0,52.0 1104.0,55.9 1124.7,94.9 1406.9,34.8 1521.8,82.9 1582.0,365.1 1495.3,861.7 1483.2,1704.5 1538.8,1772.7 1612.0,1765.5 1612.0,1784.5 1190.3,1788.9 634.0,1787.8 336.4,1783.0 73.2,1784.0 65.0,132.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9334766,29.8730897]}},{"type":"Feature","properties":{"resourceCoords":[65.0,132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.932924,29.875326]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p5 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"28"},{"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":"3652.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.5,1627.2 217.3,1731.7 217.3,1753.3 481.9,1754.2 748.8,1754.2 895.8,1754.7 889.8,1484.1 894.5,1484.2 875.2,1213.9 880.5,1214.0 879.7,938.2 878.3,938.2 875.7,663.3 879.1,663.3 877.5,390.8 888.1,390.8 867.0,114.8 745.5,116.2 350.1,115.5 71.2,116.3 48.6,157.3 72.3,555.0 23.8,1077.1 39.5,1627.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[481.1,1212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.930461,29.884247]}},{"type":"Feature","properties":{"resourceCoords":[746.2,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.928098,29.885207]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p5 [2]","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":"3586.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2865.2"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"922.0,1884.5 1202.5,1881.3 1600.2,1878.7 1597.3,1602.2 1591.9,754.7 1596.5,754.7 1589.9,498.9 1586.7,498.9 1584.1,225.0 1581.9,35.5 1533.7,75.4 1446.3,38.5 1281.0,28.1 1081.0,84.6 1012.2,70.3 954.5,103.8 998.7,186.0 950.3,259.4 951.2,386.9 988.0,437.1 952.3,485.8 969.0,1797.3 922.0,1884.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1053.5,1050.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.92616918836062,29.890421946102563]}},{"type":"Feature","properties":{"resourceCoords":[1324.3,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.92379083691328,29.89134687533257]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p6 [1]","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":"4094.0"},{"label":"split_canvas_h","value":"2184.0"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,270.1 1.0,271.1 16.7,273.9 30.2,525.8 11.0,544.9 211.4,544.8 291.4,541.8 437.2,545.0 651.0,545.0 735.8,543.1 842.7,545.0 1010.0,545.0 1006.5,270.3 1006.0,184.5 896.4,1.0 833.6,1.0 806.2,17.2 52.4,19.3 25.6,107.0 1.0,109.8 1.0,110.0 35.4,113.5 171.4,270.2 76.7,270.1 1.0,270.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[736.6,272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94263321745042,29.880902051188436]}},{"type":"Feature","properties":{"resourceCoords":[1000.5,15.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.94106153137443,29.88101964775068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p6 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"3591.6"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1137.0,110.8 1108.4,318.5 1025.3,547.8 707.8,589.0 375.4,571.2 108.8,599.3 79.3,632.9 81.4,768.9 57.8,830.2 200.4,831.8 425.0,831.4 468.6,833.5 784.8,831.8 1051.7,832.5 1452.7,830.1 1588.2,830.9 1586.3,555.5 1584.4,411.9 1584.4,238.0 1317.0,237.8 1317.0,215.9 1137.0,110.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[203.0,564.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.93732806758318,29.884964586806547]}},{"type":"Feature","properties":{"resourceCoords":[1572.0,549.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9327971116617,29.881829054798494]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p6 [3]","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":"3539.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"2662.8"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"15.0,1494.2 1388.0,1484.3 1388.0,1479.1 1567.8,1372.6 1513.1,1306.8 1583.1,1143.6 1528.2,974.1 1493.8,950.0 955.3,918.6 171.5,937.6 51.7,989.2 64.6,1160.1 31.9,1287.6 12.4,1303.8 15.0,1494.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[553.0,1213.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.91968589420979,29.8910502349947]}},{"type":"Feature","properties":{"resourceCoords":[1101.0,1490.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.918655781858,29.88898458053474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p6 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.22"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6938.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"714.0"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"256.1,1743.8 186.2,1744.2 132.3,1749.8 86.8,1838.7 105.7,1910.9 219.0,1912.0 315.6,1901.6 414.3,1891.1 256.1,1743.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0006__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1734.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.94523610623727,29.883678354754178]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1734.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.94060735546732,29.879597544316947]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.94112599159567,29.879149021254065]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.94575474236561,29.883229831691295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1106.4,1781.2 508.8,1778.0 242.7,1774.5 248.9,114.5 512.9,115.4 811.4,122.5 1369.2,127.6 1372.5,564.4 1369.2,682.8 1368.7,1113.6 1364.8,1232.5 1359.9,1786.1 1106.4,1781.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[247.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.935868,29.87217]}},{"type":"Feature","properties":{"resourceCoords":[808.0,1780.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9364154,29.8699379]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p8 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.84"},{"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":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1681.5 1567.3,1661.0 1457.2,1418.7 1190.5,1463.3 1087.9,1394.6 936.0,1394.0 762.0,966.7 894.5,661.4 899.5,127.6 863.7,71.3 487.6,105.3 487.5,124.4 63.8,126.0 67.3,563.6 64.1,682.2 63.9,1113.8 60.0,1233.0 55.5,1787.5 107.0,1790.1 398.2,1789.0 795.9,1790.8 853.0,1786.2 892.4,1758.4 1612.0,1742.3 1612.0,1738.5 1612.0,1681.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[87.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9339969,29.870835]}},{"type":"Feature","properties":{"resourceCoords":[87.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9332602,29.871628]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1918 | sanborn08703_005 p9","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T02:16:27Z","modified":"2026-10-20T02:16:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1476.2,1843.0 1466.6,1564.0 1452.2,1564.0 1495.3,1222.3 1514.4,1222.5 1505.2,646.9 1512.2,647.0 1492.5,97.6 1238.0,99.0 702.1,99.9 169.8,95.3 172.2,1215.9 155.6,1215.8 66.9,1557.8 1.0,1557.5 1.0,1577.4 76.9,1625.8 73.4,1807.1 419.1,1874.6 1425.2,1830.0 1476.2,1843.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g087031918:08703_1918-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1238.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.941485,29.870854]}},{"type":"Feature","properties":{"resourceCoords":[1238.0,99.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.93998,29.872466]}}]}}]}