{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03798_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Nahant, Massachusetts | 1914 | 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":"16"},{"label":"placed","value":"15"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef-snap 11, georef 3, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"1 sheet(s) cut into 2 panels"},{"label":"unplaced pages","value":"p3__2 (tier 1, 42.42267,-70.92625 +/-121m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.8,1673.7 567.0,1721.8 274.4,1803.5 276.8,1458.5 281.9,1353.0 281.6,1191.0 288.0,933.9 293.0,575.7 290.3,576.7 266.8,189.5 509.9,38.8 1059.6,57.7 1090.7,21.0 1319.8,143.7 1313.4,144.5 1307.7,482.1 1304.9,802.0 1306.6,1022.0 1301.1,1267.8 1301.0,1555.2 798.4,1667.7 770.8,1673.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[294.0,1183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9196913277763,42.42711838808697]}},{"type":"Feature","properties":{"resourceCoords":[1294.0,1567.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91824015147617,42.425470241110126]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p11","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.6,1605.1 1276.1,1560.9 1276.5,1304.0 1281.5,1014.1 1279.4,798.7 1285.2,334.6 1404.2,333.8 1073.0,1.0 1005.3,1.0 1002.6,24.5 765.1,172.4 243.0,119.8 56.0,344.0 285.6,464.7 279.2,465.6 276.2,802.7 275.9,1122.0 279.4,1341.6 275.8,1587.0 278.0,1874.0 923.0,1717.2 1009.6,1692.3 1204.1,1622.6 1270.6,1605.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,1054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9169964,42.4266929]}},{"type":"Feature","properties":{"resourceCoords":[278.0,1874.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9182088,42.4254801]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1371.8,1742.4 1355.3,1597.7 1334.4,761.8 1336.0,633.9 1334.6,633.9 1307.7,1.0 1279.1,1.0 1188.7,42.6 246.3,101.9 89.3,182.7 75.5,306.4 141.4,306.1 471.3,634.8 353.7,636.1 350.0,1095.1 353.1,1308.2 349.3,1594.9 350.1,1849.0 344.8,1892.7 541.8,1867.8 1210.1,1795.3 1359.9,1750.2 1376.3,1742.9 1371.8,1742.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1323.0,632.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91195111386494,42.42558776998492]}},{"type":"Feature","properties":{"resourceCoords":[360.0,632.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91389568554504,42.426656821191955]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"83.4,1407.1 78.4,1284.7 144.3,981.0 79.9,484.8 109.9,246.8 277.7,97.8 437.1,91.7 488.4,46.2 497.3,109.4 713.2,211.0 723.7,170.9 824.9,180.9 1017.0,197.3 1286.2,222.0 1305.2,228.3 1310.1,327.5 1320.6,663.6 1337.4,740.1 1341.4,751.3 1351.9,751.7 1373.0,840.6 1419.2,980.3 1486.7,1176.8 1503.6,1247.6 1510.4,1331.5 1508.0,1409.3 1537.9,1535.2 1531.9,1539.0 1539.5,1680.2 1589.2,1758.9 1284.9,1701.3 1292.8,1679.7 1307.0,1656.2 1327.0,1633.6 1258.3,1644.8 978.4,1582.5 832.4,1542.9 730.7,1509.8 725.5,1508.8 83.4,1407.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[760.0,1529.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91175385210869,42.420501198239165]}},{"type":"Feature","properties":{"resourceCoords":[707.0,393.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91672951648927,42.42258893261541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.0,925.5 1.0,1753.9 1.0,1912.0 7.7,1912.0 10.1,1911.2 11.7,1890.1 192.4,1854.0 477.0,1771.3 877.6,1649.7 1021.2,1620.7 1190.7,1613.2 1347.2,1623.7 1603.0,1572.7 1518.1,1426.9 1584.3,871.9 1417.8,266.1 1445.3,182.3 1014.0,52.5 739.0,161.8 244.0,111.4 107.2,156.4 133.6,159.4 88.6,797.4 90.0,797.5 86.8,822.9 74.0,925.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[92.0,791.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91191515348099,42.425579194021424]}},{"type":"Feature","properties":{"resourceCoords":[-30.0,1907.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91358113690512,42.42391435928611]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.64"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.7,1284.0 70.6,1178.5 70.1,1029.2 56.2,746.8 27.6,684.5 54.2,697.4 80.2,704.6 102.9,706.3 78.1,401.9 81.4,398.2 96.2,280.8 196.9,318.5 349.4,219.1 782.0,198.4 871.2,99.8 847.2,73.2 1257.0,109.6 1377.7,88.0 1448.5,137.4 1480.1,107.8 1520.5,158.9 1534.8,414.3 1561.3,438.3 1561.3,603.1 1530.5,647.9 1559.8,679.3 1585.3,901.1 1536.0,1476.9 1561.4,1533.9 1522.8,1629.8 1531.9,1827.1 1371.7,1871.2 1337.8,1850.2 1002.0,1880.8 742.5,1806.0 610.1,1686.2 495.8,1679.7 416.2,1767.6 442.9,1796.6 256.9,1831.9 162.9,1912.0 154.2,1912.0 135.7,1912.0 66.0,1289.2 65.7,1284.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.90729795069045,42.42388760365468]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.90179535035617,42.419366706786356]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.90900745103207,42.41451502850345]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.91451005136636,42.41903592537177]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"111.9,1449.3 82.7,1353.1 135.4,1332.6 213.5,1100.8 184.9,687.1 232.0,553.0 236.7,352.5 317.1,232.9 409.2,186.1 543.9,177.8 738.8,68.9 885.0,61.7 959.6,90.5 1009.0,330.7 1132.1,384.8 1193.8,380.2 1240.0,491.8 1359.8,544.5 1382.5,510.9 1435.1,716.6 1425.7,1054.0 1385.2,1155.3 1442.0,1251.8 1531.9,1291.3 1530.1,1485.2 1563.8,1507.9 1513.0,1831.1 669.3,1889.0 364.9,1858.5 111.8,1874.2 116.8,1844.6 82.5,1841.5 77.9,1617.0 111.9,1449.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[726.0,966.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.93318000625086,42.43659654172371]}},{"type":"Feature","properties":{"resourceCoords":[1081.0,1168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.93339118813793,42.43508924230005]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"181.3,309.1 184.5,189.4 1135.1,108.0 1135.9,104.4 1488.7,49.3 1461.6,220.7 1520.0,329.7 1483.0,1875.8 1087.8,1879.9 434.2,1784.2 114.2,1612.3 107.5,1547.2 172.1,639.9 181.3,309.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.93275815698456,42.42080871117]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.93160576411425,42.41793752099838]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.93618607353179,42.41692143864381]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9373384664021,42.41979262881543]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p3 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.09"},{"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":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1409.5,1870.8 1495.5,1664.8 1466.8,1252.1 1558.8,1017.9 1466.2,729.9 1491.7,501.8 1384.5,331.1 1450.7,171.8 1413.2,158.9 1415.5,124.3 1345.5,182.4 1300.8,120.3 1204.6,207.9 1152.8,1050.5 1127.0,1064.2 1026.8,1065.0 651.2,1108.2 470.2,1002.3 574.3,901.2 504.0,806.1 572.6,396.3 506.9,124.0 76.0,60.9 43.2,347.7 208.7,849.4 136.9,1095.3 185.4,1258.7 98.5,1468.8 78.5,1466.5 27.1,1659.0 20.6,1682.7 1027.7,1841.2 1029.5,1837.6 1409.5,1870.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1159.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9314403,42.4187972]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,1308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9308994,42.418916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.9,73.3 49.6,89.8 38.2,336.4 103.6,898.0 79.7,1686.0 57.9,1740.8 1.0,1760.2 1.0,1760.5 844.4,1789.8 1175.7,1786.8 1318.7,1785.3 1506.4,1782.9 1477.7,1604.2 1183.6,1194.8 1235.3,996.5 1346.4,889.3 1341.5,676.2 1454.6,356.0 74.6,143.9 74.9,73.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1320.0,1412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.93325621194336,42.421057321020854]}},{"type":"Feature","properties":{"resourceCoords":[924.0,162.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.93500031744651,42.42310249897619]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p5","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.01"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.2,1630.8 1454.4,1476.6 1389.0,1460.7 1542.0,934.6 1558.0,941.5 1571.3,817.7 1605.2,781.3 1584.4,776.0 1555.5,182.9 1505.0,97.5 1405.5,75.3 894.8,26.6 463.0,93.5 373.4,83.7 316.1,101.9 274.4,226.1 216.8,283.7 73.3,227.2 58.4,772.9 38.2,800.6 64.0,866.5 23.4,1191.7 33.8,1651.7 28.6,1735.9 1.0,1754.1 1.0,1785.6 601.3,1875.4 614.8,1836.8 1349.8,1844.4 1458.6,1863.7 1469.7,1760.4 1436.2,1630.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[393.0,1714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.934983,42.423446]}},{"type":"Feature","properties":{"resourceCoords":[801.0,1714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.932717,42.423875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1589.4,1285.7 1529.8,1248.0 1506.4,1245.5 1276.5,1073.0 1300.0,918.1 1326.5,729.1 1328.0,707.0 1348.6,559.4 1353.0,548.4 1377.2,403.1 1390.0,308.7 1398.9,44.2 1325.6,84.3 884.2,18.8 695.7,22.4 377.6,129.8 342.2,95.2 285.4,188.3 107.7,264.6 113.8,526.2 55.5,669.8 82.0,771.3 58.2,834.0 1.0,865.2 1.0,923.8 85.1,1036.0 66.4,1042.7 348.1,1600.3 414.9,1562.7 519.7,1705.3 648.4,1787.4 719.5,1882.2 815.7,1819.8 1336.2,1871.0 1458.9,1845.4 1499.2,1881.4 1556.9,1858.2 1599.2,1586.7 1569.2,1296.7 1589.4,1285.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[820.0,804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92581018751957,42.427287176003134]}},{"type":"Feature","properties":{"resourceCoords":[1240.0,1223.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92496562506378,42.42517485645751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.3,1512.0 40.2,1133.4 75.0,824.6 34.8,749.2 112.0,629.9 117.7,582.7 470.0,123.2 781.7,174.0 1162.0,231.3 1203.8,384.2 1290.8,561.8 1375.6,760.7 1426.5,960.0 1483.1,1311.8 1523.2,1611.6 1542.7,1819.3 1543.6,1831.5 893.3,1758.7 886.7,1745.2 618.6,1837.2 639.0,1866.9 244.3,1842.8 92.3,1512.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[737.0,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92405595367414,42.426003652143606]}},{"type":"Feature","properties":{"resourceCoords":[506.0,1164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92210773511464,42.424756557621876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1238.9 1.0,1368.7 402.6,1631.7 434.8,1554.8 633.9,1603.2 1012.8,1690.0 1543.4,1815.2 1579.5,1833.0 1576.4,1764.5 1549.4,1560.2 1543.3,1470.5 1526.0,808.5 1518.0,295.5 1517.9,279.7 873.8,164.4 868.1,150.5 594.5,224.7 613.0,255.7 220.7,205.8 316.0,454.9 255.3,658.9 141.9,710.0 140.7,1063.9 64.2,1090.3 113.7,1164.4 1.0,1238.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1513.0,792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91825962102962,42.42547069550333]}},{"type":"Feature","properties":{"resourceCoords":[1114.0,691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91889858183167,42.42487687820567]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nahant, Massachusetts | 1914 | sanborn03798_002 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:12:04Z","modified":"2026-10-19T15:12:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"57.8,1846.4 132.7,1555.2 144.1,1534.2 225.6,1248.2 272.8,1062.0 351.0,533.7 398.6,514.3 424.1,440.6 308.2,194.8 174.2,98.9 379.5,39.1 1248.3,34.0 1521.2,121.0 1536.5,116.0 1466.9,496.7 1469.7,496.4 1379.5,842.1 1311.9,1089.6 1273.5,1246.7 1243.5,1347.7 1158.9,1681.2 802.6,1701.5 598.9,1731.9 392.0,1796.0 206.2,1864.4 49.5,1890.5 57.8,1846.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g037981914:03798_1914-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1370.0,833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91935290028763,42.42751694948415]}},{"type":"Feature","properties":{"resourceCoords":[259.0,1103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92217097499274,42.427827053112885]}}]}}]}