{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03829_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Reading, Massachusetts | 1918 | 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":"22"},{"label":"placed","value":"13"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef-snap 8, georef 5"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 14 panels"},{"label":"unplaced pages","value":"p12 (tier 3, 42.51832,-71.10025 +/-908m); p13__1 (tier 1, 42.52441,-71.09210 +/-100m); p13__2 (tier 1, 42.52388,-71.09015 +/-100m); p13__3 (tier 1, 42.52408,-71.09017 +/-100m); p13__4 (tier 1, 42.52427,-71.09167 +/-100m); p14__1 (tier 4, 42.52389,-71.10524 +/-1115m); p14__2 (tier 1, 42.52824,-71.08059 +/-101m); p14__3 (tier 4, 42.52389,-71.10524 +/-1115m); p14__4 (tier 4, 42.52389,-71.10524 +/-1115m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p10","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1036.7,1392.5 1035.8,1489.8 864.1,1653.6 805.8,1663.9 808.8,1912.0 792.1,1912.0 778.2,1870.8 716.5,1849.9 616.6,1877.5 77.7,1885.1 27.7,1842.2 35.2,1509.9 86.8,1262.0 59.8,1198.9 91.0,1110.2 59.3,1040.6 49.9,861.3 97.8,627.7 75.6,449.6 102.9,95.5 613.0,88.8 698.1,73.5 742.5,28.4 847.4,52.1 1054.0,37.0 1295.7,85.2 1477.3,48.6 1545.3,72.9 1530.0,109.2 1562.9,130.9 1545.7,178.4 1574.7,283.1 1537.5,708.9 1563.3,872.6 1517.4,973.6 1488.7,1232.4 1072.7,1392.0 1036.7,1392.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[629.0,1694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1176039,42.5192191]}},{"type":"Feature","properties":{"resourceCoords":[756.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1185475,42.5215361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p11 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.37"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4272.4"},{"label":"split_canvas_w","value":"3482.8"},{"label":"split_canvas_h","value":"3379.6"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.1,1084.2 175.0,1131.8 96.0,1146.1 95.4,1434.5 104.3,1830.1 481.2,1805.0 502.9,1794.2 571.0,1852.0 637.1,1912.0 656.2,1912.0 709.4,1912.0 703.5,1880.3 775.1,1834.9 750.1,1794.7 752.6,1677.5 462.3,1101.7 175.1,1084.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[96.0,1465.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1085248,42.5281168]}},{"type":"Feature","properties":{"resourceCoords":[96.0,1146.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1087581,42.5292871]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p11 [2]","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":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"789.6,1699.6 834.2,1734.8 851.0,1738.3 879.3,1811.5 878.8,1776.3 894.3,1777.0 914.8,1799.4 968.8,1848.8 1383.9,1883.6 1383.0,1880.2 1609.0,1882.2 1610.8,1881.3 1603.9,1863.7 1569.8,1790.2 1548.7,1734.8 1529.4,1664.2 1529.0,1002.4 1527.6,610.9 1533.5,325.6 1612.0,313.0 1612.0,265.9 1601.5,265.0 1595.0,128.9 1519.8,32.5 1185.0,27.9 1095.7,60.5 259.8,20.0 87.6,89.9 88.3,239.6 36.9,417.1 58.2,464.4 22.8,743.1 34.1,1025.8 107.5,1067.2 447.1,1065.3 580.2,1273.5 788.0,1691.1 762.0,1694.1 768.0,1707.7 768.0,1707.7 789.6,1699.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,1089.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11291068174081,42.52587752466861]}},{"type":"Feature","properties":{"resourceCoords":[550.0,66.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1139097248215,42.52964252629779]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1433.6,1841.5 960.7,1713.8 956.8,1561.6 911.7,1546.4 603.7,1774.9 546.8,1809.3 377.9,1901.8 355.7,1912.0 339.9,1878.1 259.8,1731.0 209.0,1619.8 159.7,1476.6 71.2,111.7 838.8,25.7 882.1,1.4 1026.5,113.3 1167.2,229.7 1315.0,223.0 1299.9,158.9 1441.9,59.5 1530.5,188.5 1582.0,492.7 1593.5,500.6 1570.9,567.7 1495.2,504.9 1419.6,1153.0 1426.4,1325.8 1427.4,1619.9 1432.8,1810.7 1433.6,1841.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[462.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10726660357167,42.52690858503173]}},{"type":"Feature","properties":{"resourceCoords":[946.0,1524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10572487215346,42.524392596791635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.1,1369.3 62.5,1180.9 62.8,890.5 56.8,719.9 134.2,80.3 208.7,142.6 231.2,76.4 295.7,120.9 875.0,159.7 1195.5,60.5 1334.2,75.1 1361.0,42.1 1503.9,387.7 1474.6,402.0 1500.1,832.1 1527.7,833.7 1527.5,1402.1 1506.3,1397.9 1501.0,1868.8 1476.5,1865.6 1148.9,1821.7 1114.5,1814.2 695.6,1672.3 635.8,1658.0 482.1,1633.5 371.8,1625.7 279.9,1636.0 187.6,1666.5 77.4,1719.6 71.1,1670.8 67.8,1404.2 67.1,1369.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1031.0,494.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10230079696923,42.525748342446256]}},{"type":"Feature","properties":{"resourceCoords":[771.0,1256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10274655984054,42.52430626942851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p4","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.6,1797.5 449.0,1797.2 443.0,1864.2 813.7,1794.8 1266.9,1879.0 1474.0,1797.2 1612.0,1813.6 1612.0,1668.3 1539.5,1642.4 1537.3,1511.7 1548.2,1470.2 1568.5,1484.1 1352.1,1023.9 1396.0,1057.8 1419.2,1044.8 1480.3,663.7 1457.8,674.8 1590.4,126.8 1571.7,136.6 1549.7,148.1 1546.0,150.1 1072.8,168.1 1074.9,175.1 202.8,143.0 84.8,44.9 40.8,1.0 7.3,1.0 58.5,850.5 60.3,908.8 313.8,1579.7 332.0,1623.0 294.4,1639.9 293.9,1640.2 398.6,1797.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1156.0,365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1079594,42.5231139]}},{"type":"Feature","properties":{"resourceCoords":[332.0,1623.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1095861,42.5207053]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"453.7,1912.0 878.5,1912.0 959.4,1843.1 1400.2,1886.7 1421.8,1912.0 1424.5,1912.0 1461.2,1892.7 1531.8,1899.7 1540.0,1575.5 1536.0,1576.1 1477.0,1268.8 1438.2,1083.9 1417.5,909.8 1421.6,846.5 1489.2,454.4 1526.4,403.2 1610.4,379.7 1593.3,174.3 1438.3,201.0 1330.2,229.5 1245.7,269.4 1167.3,328.8 1079.3,415.5 1057.4,371.0 967.1,117.0 965.6,112.8 477.6,142.7 425.8,1.0 377.3,1.0 159.5,314.2 116.6,364.9 1.0,490.3 1.0,496.4 58.6,1042.8 75.8,1025.2 145.1,1398.6 127.9,1418.4 76.0,1401.5 428.7,1756.6 405.3,1750.5 408.9,1792.5 453.7,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,1751.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10662198898271,42.52121918393671]}},{"type":"Feature","properties":{"resourceCoords":[692.0,778.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10547513278917,42.5228403128953]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"394.4,97.7 374.6,301.9 288.2,310.1 242.7,353.7 106.8,725.8 91.5,787.0 80.9,961.3 86.0,1149.3 89.3,1460.8 93.3,1461.0 27.7,1777.0 1.0,1769.5 1.0,1853.3 201.8,1894.0 1488.6,1887.8 1568.5,1854.6 1565.2,1618.1 1589.0,1617.0 1578.2,1473.4 1612.0,1473.9 1612.0,1268.5 1519.4,1012.7 1382.7,594.1 1262.0,178.0 929.5,183.4 894.1,181.1 456.0,102.9 394.4,97.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1175.0,216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10105834084621,42.52326593500963]}},{"type":"Feature","properties":{"resourceCoords":[88.0,1444.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10388493076003,42.52111562210854]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.56"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.2,978.8 96.0,752.3 106.1,755.1 127.0,481.5 113.8,479.7 117.4,271.8 132.0,265.9 76.0,94.3 120.0,47.8 285.8,27.7 580.5,64.1 575.2,85.5 680.4,147.8 901.9,111.5 949.4,108.0 977.4,113.3 1177.7,175.4 1309.7,212.6 1312.5,213.2 1520.8,349.5 1515.9,410.3 1572.7,439.9 1570.4,1062.9 1522.5,1068.6 1492.8,1210.9 1509.6,1257.2 1570.5,1279.2 1564.1,1825.8 1200.1,1806.0 886.1,1867.5 743.5,1819.8 555.5,1803.4 450.2,1827.4 267.6,1801.2 204.9,1710.4 62.6,1684.4 73.1,1616.1 88.8,1619.9 110.9,1523.9 95.1,1394.3 76.2,1183.9 64.5,976.4 76.2,978.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[141.0,463.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10092747804522,42.52530203216322]}},{"type":"Feature","properties":{"resourceCoords":[709.0,1451.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09712442924355,42.52199312792819]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_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":"Reading, Massachusetts | 1918 | sanborn03829_006 p8 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.78"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4306.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3346.0"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"812.1,1912.0 964.3,1912.0 1129.3,1912.0 1212.0,1908.5 1243.2,1816.5 1458.1,1817.6 1578.9,1496.8 1549.8,1159.0 1403.7,1125.8 1352.7,1199.6 1003.9,1246.7 876.1,1132.3 733.5,1113.5 631.8,1230.4 172.3,1358.2 148.3,1299.7 134.8,1304.2 186.6,1466.6 247.0,1710.1 252.9,1709.0 769.3,1791.2 812.1,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[247.0,1710.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0952246,42.5270399]}},{"type":"Feature","properties":{"resourceCoords":[1438.0,1356.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0921749,42.5271496]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p8 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"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":"5396.8"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1472.9,381.6 1491.5,92.0 1443.5,35.9 89.5,18.4 26.1,66.8 17.4,1095.2 1.0,1097.2 1.0,1143.5 243.8,1216.0 672.8,1031.2 766.9,1000.2 826.2,996.8 1261.8,1021.4 1547.2,1029.9 1530.8,781.7 1508.5,614.1 1522.5,612.0 1472.9,381.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0008__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1070.0,122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09626353139977,42.5287514040611]}},{"type":"Feature","properties":{"resourceCoords":[666.0,1005.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0974026271475,42.527187128253374]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"3401.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4250.4"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"335.1,997.9 298.2,997.2 294.4,1096.8 113.9,1259.0 54.0,1267.8 49.5,1521.5 32.5,1521.0 43.0,1555.0 28.1,1816.0 76.5,1856.5 139.6,1842.0 576.1,1911.1 870.8,1911.6 1132.0,1808.7 1364.6,1836.7 1426.3,1817.2 1458.1,1830.6 1441.6,1740.5 1461.5,1740.2 1461.7,1717.4 1476.0,1370.2 1486.3,1343.8 1612.0,991.4 1612.0,909.0 1597.2,899.6 1567.2,850.4 1554.5,850.4 1542.5,850.4 1541.4,889.3 1413.1,929.5 1174.6,948.6 1031.0,883.1 876.4,895.5 764.0,856.4 756.4,850.4 335.1,997.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[281.0,1523.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11525533191217,42.51923292296429]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,1342.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11056711061472,42.52198437140035]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Reading, Massachusetts | 1918 | sanborn03829_006 p9 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"},{"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":"3401.6"}],"created":"2026-10-19T03:08:58Z","modified":"2026-10-19T03:08:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,149.8 1.0,359.4 10.3,378.4 65.9,405.2 74.5,475.4 138.1,557.8 126.2,588.5 171.3,612.0 194.1,804.3 224.2,848.8 983.5,847.0 1239.6,796.1 1410.0,815.2 1525.7,797.7 1564.2,731.6 1584.3,598.6 1515.5,439.6 1513.8,65.5 1450.5,61.2 1436.5,25.1 887.5,87.4 687.0,23.8 551.0,88.2 365.9,73.6 206.0,10.7 214.6,1.0 155.2,1.0 1.0,149.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038291918:03829_1918-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[882.0,318.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1041103,42.5176551]}},{"type":"Feature","properties":{"resourceCoords":[687.0,318.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1045643,42.5182968]}}]}}]}