{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03863_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Swampscott, Massachusetts | 1907 | 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":"28"},{"label":"placed","value":"21"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef-snap 16, georef 3, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p20__1 (tier 2, 42.46487,-70.90558 +/-100m); p20__2 (tier 1, 42.46481,-70.90195 +/-168m); p22 (tier 3, 42.46437,-70.89725 +/-100m); p23 (tier 3, 42.46723,-70.89355 +/-494m); p24__1 (tier 1, 42.47331,-70.89196 +/-100m); p25__2 (tier 1, 42.47582,-70.88401 +/-100m); p9__2 (tier 2, 42.47058,-70.91866 +/-187m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.8,592.0 179.6,609.8 125.2,428.0 161.5,395.4 136.6,439.6 139.2,442.2 327.1,327.0 439.9,161.0 537.0,71.2 614.9,112.0 700.8,145.9 753.8,156.1 1403.5,421.9 1316.2,458.8 1426.3,618.7 1565.7,795.1 1301.3,1020.4 1478.0,1209.7 1485.5,1250.7 1467.4,1273.8 1314.1,1374.8 1279.4,1437.3 1339.2,1464.6 1506.3,1841.2 1481.0,1825.2 1264.9,1823.7 1050.0,1733.0 245.4,1685.7 214.6,1441.5 290.2,1186.5 203.0,715.9 115.8,706.6 119.8,592.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1282.0,1022.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91495665997085,42.46798281163594]}},{"type":"Feature","properties":{"resourceCoords":[945.0,627.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91595661003704,42.468587924401184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1504.0,1073.3 1489.0,1036.5 1470.3,965.0 1464.5,898.9 1467.5,730.2 1552.0,535.7 1589.8,407.1 1569.7,321.4 1516.9,246.0 1441.0,156.5 1413.8,102.6 1397.5,6.7 1390.0,3.9 1277.3,70.5 970.6,40.8 806.8,111.9 547.6,36.7 118.4,50.2 85.7,74.9 33.6,344.7 73.8,567.9 29.6,1355.2 1.0,1383.6 1.0,1493.8 275.6,1884.5 391.3,1877.5 497.9,1875.0 849.1,1550.3 849.7,1462.0 876.9,1419.0 1504.0,1073.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[368.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91717712339685,42.47370014720816]}},{"type":"Feature","properties":{"resourceCoords":[1487.0,1014.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91371371687505,42.47312880306882]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1124.8,1611.3 1048.0,1617.4 965.7,1605.9 796.2,1662.0 664.7,1670.9 538.5,1647.8 425.6,1613.2 325.5,1558.4 235.6,1486.5 169.1,1417.7 97.2,1310.3 20.1,1219.3 245.5,564.1 346.1,601.0 793.8,427.0 826.9,344.6 868.1,314.4 1581.5,222.4 1581.5,223.5 1587.0,366.4 1563.1,504.7 1469.5,701.5 1427.5,868.0 1422.5,913.9 1421.8,958.7 1443.2,1068.3 1612.0,1262.0 1612.0,1277.7 1612.0,1300.4 1542.9,1314.0 1456.5,1360.1 1413.3,1437.6 1345.4,1523.6 1295.3,1651.0 1289.1,1670.5 1124.8,1611.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[250.0,560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91713906772536,42.47366072337892]}},{"type":"Feature","properties":{"resourceCoords":[663.0,719.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91641925537094,42.4730376087441]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1317.2,1350.2 746.5,1751.2 709.6,1790.0 635.2,1843.6 559.3,1886.9 515.5,1845.7 451.8,1734.7 353.8,1521.2 304.8,1381.5 275.2,1261.2 251.3,1078.7 250.4,1024.4 257.1,887.7 293.9,784.5 310.0,697.2 377.1,625.8 438.2,590.9 425.9,554.4 204.0,424.9 148.6,328.0 145.1,317.0 940.8,123.2 1509.5,218.8 1469.7,339.7 1418.8,508.4 1358.2,725.7 1343.3,986.0 1344.5,1191.5 1317.2,1350.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[874.0,700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9144819322721,42.47052618872864]}},{"type":"Feature","properties":{"resourceCoords":[1330.0,792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91387394078578,42.469791875322606]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"107.0,1340.1 53.2,1302.8 98.2,1247.8 265.9,1176.0 287.7,1156.6 287.6,1115.2 148.2,898.9 446.4,725.2 341.2,528.1 261.6,352.3 510.8,296.4 700.4,216.8 946.6,131.2 1170.7,104.2 1346.1,86.8 1486.1,76.6 1483.4,257.9 1485.0,459.9 1463.7,618.0 1420.8,827.6 1425.0,871.3 1451.8,932.9 1458.5,1584.7 1500.2,1590.2 1372.5,1882.2 1373.6,1841.3 1273.5,1796.3 309.6,1835.1 203.9,1737.8 107.0,1340.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[147.0,881.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91492833869273,42.46802234631176]}},{"type":"Feature","properties":{"resourceCoords":[1496.0,476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91211203808169,42.46959307022323]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.7,1148.3 217.6,1077.5 206.9,1011.1 197.5,840.6 268.5,638.1 297.1,505.6 270.6,420.6 211.8,348.3 128.6,263.5 97.2,211.1 73.7,115.5 231.3,160.2 329.9,86.3 698.3,53.1 1143.4,202.2 1290.0,51.4 1260.0,902.5 1294.8,931.8 1252.8,1039.9 1173.8,1631.7 431.4,1912.0 430.9,1912.0 416.9,1881.7 401.4,1837.8 366.9,1668.3 366.1,1448.7 327.3,1312.7 260.0,1185.3 241.7,1148.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,816.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91313379167387,42.4735076658475]}},{"type":"Feature","properties":{"resourceCoords":[1247.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91181274278597,42.471856338842905]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"262.9,1115.9 304.8,1007.4 270.1,978.4 300.5,126.4 329.9,96.0 1100.2,77.0 1503.0,193.6 1562.5,236.3 1576.0,418.4 1612.0,444.2 1602.0,531.6 1593.1,497.4 1490.2,1341.2 1414.5,1320.4 1309.9,1492.3 1250.8,1578.4 1195.2,1683.8 1166.0,1808.3 969.9,1756.8 794.8,1706.7 792.3,1719.6 212.7,1697.4 183.6,1708.6 262.9,1115.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.91019304546084,42.47330274139221]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9078602307026,42.470887323386016]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.91171667258111,42.46883215709229]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.91404948733935,42.47124757509848]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"224.1,93.1 341.6,105.2 442.6,127.8 639.4,160.4 648.0,238.2 1462.7,18.4 1434.4,39.4 1514.6,32.6 1489.2,136.2 1588.1,1236.0 1559.0,1446.9 1563.8,1448.1 1552.9,1494.6 1612.0,1510.1 1606.7,1535.7 1536.2,1776.0 1558.1,1796.1 1503.6,1912.0 1495.4,1890.1 803.8,1735.6 169.5,1745.6 150.8,1540.2 244.2,1235.1 202.1,1234.5 120.3,586.9 86.5,528.8 77.4,485.8 95.8,272.4 98.8,112.6 224.1,93.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[94.0,59.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91219562934789,42.46970805065623]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,1494.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9076855302172,42.46779505967824]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.0,437.9 100.5,190.6 105.6,164.7 42.8,154.3 49.4,106.7 269.8,139.7 397.4,32.4 821.3,229.6 1287.0,247.2 1364.4,177.0 1356.5,279.9 1527.7,327.8 1478.6,1004.3 1528.4,1019.2 1528.8,1115.8 1463.5,1403.4 1527.8,1420.5 1557.8,1618.2 1495.3,1787.2 938.4,1882.4 516.0,1774.6 301.2,1868.8 175.3,1716.2 199.6,1504.3 113.0,1387.3 131.4,1115.0 28.0,588.1 75.8,456.0 52.0,437.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[980.0,296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.90543447127502,42.46777180653485]}},{"type":"Feature","properties":{"resourceCoords":[102.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.90763321799383,42.46772409294964]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1559.5,1487.0 1440.1,1559.3 1364.0,1773.0 732.1,1858.5 415.1,1798.5 134.2,1665.2 130.1,1519.8 44.8,1419.5 26.3,419.6 120.4,142.7 500.6,61.3 1042.2,132.2 1379.2,68.9 1485.6,122.0 1500.7,202.2 1554.8,225.3 1583.0,392.8 1495.0,861.2 1564.3,1070.8 1559.5,1487.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[996.0,1484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.90003929589025,42.468419066799065]}},{"type":"Feature","properties":{"resourceCoords":[828.0,312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.90124894698376,42.47041608417462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p2","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1404.3,1558.7 1384.8,1561.7 1371.3,1495.3 1561.0,287.2 1477.2,288.9 1505.9,237.1 1273.5,1.0 1263.8,1.0 1267.5,27.4 1008.7,144.5 514.6,122.1 486.5,170.6 215.2,151.9 29.8,178.7 221.3,525.6 344.9,725.7 366.1,813.6 334.6,862.4 165.8,1059.7 33.1,1221.3 21.6,1316.4 70.2,1415.5 141.7,1460.2 221.7,1451.6 164.9,1789.2 129.1,1815.5 163.3,1807.3 877.5,1848.8 1097.4,1808.6 1386.0,1628.3 1404.3,1558.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[384.0,786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.925101,42.477654]}},{"type":"Feature","properties":{"resourceCoords":[1205.0,1463.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.926527,42.476012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p21","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"475.5,1876.5 433.7,1797.7 75.4,1782.9 45.1,1439.5 139.0,1166.0 162.4,826.8 65.0,323.9 319.8,213.2 293.4,241.6 325.7,268.8 367.6,254.7 383.9,189.7 639.5,55.5 1336.0,53.9 1464.0,220.1 1612.0,268.7 1432.6,252.1 1538.2,636.8 1612.0,861.8 1612.0,900.1 1612.0,952.8 1569.7,993.1 1357.8,1146.4 1189.8,1273.2 1156.2,1363.6 1180.3,1472.0 1239.8,1532.7 1320.1,1543.1 1184.8,1860.2 1143.6,1877.5 475.5,1876.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[961.0,603.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.924926,42.479013]}},{"type":"Feature","properties":{"resourceCoords":[1636.0,930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.925101,42.477654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0024__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p24 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"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":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0024__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1160.7 1593.9,1155.5 1564.9,881.0 1596.1,256.9 1579.4,131.8 1535.4,71.8 1076.3,96.5 1024.3,61.7 893.7,72.4 755.9,31.6 384.6,15.8 130.3,35.2 56.8,125.1 34.7,314.8 86.9,536.8 92.0,1154.3 118.7,1154.2 127.3,1197.7 380.6,1201.5 463.8,1678.2 431.5,1698.9 426.1,1799.8 572.4,1803.7 739.9,1881.8 1260.0,1885.3 1392.2,1826.5 1458.4,1835.3 1495.1,1602.0 1427.6,1457.7 1384.5,1362.5 1557.5,1185.5 1612.0,1160.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0024__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[531.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.89184548000428,42.47296907507634]}},{"type":"Feature","properties":{"resourceCoords":[894.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.89373593993133,42.474755738160155]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0025__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p25 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.51"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0025__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.8,856.6 121.9,942.5 210.7,1072.2 212.8,1305.2 147.3,1307.0 28.8,1385.0 46.8,1657.5 93.6,1823.8 285.8,1809.1 509.5,1835.7 537.4,1810.4 585.5,1827.8 698.9,1798.2 1170.3,1860.0 1503.9,1874.7 1557.5,1853.3 1581.7,1769.7 1567.9,536.6 1527.2,475.7 1479.3,189.4 1494.3,78.0 1060.0,18.8 624.0,48.6 570.0,593.8 570.0,611.5 566.5,611.5 566.2,612.6 256.8,621.5 203.7,657.1 64.8,856.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0025__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.89100740743845,42.47635043731687]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.88752784169237,42.481812855970595]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.8788056617843,42.47874774505838]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.88228522753037,42.47328532640465]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1566.0,1813.1 1561.0,1813.3 1430.8,1193.0 1439.3,1189.8 1400.5,1040.3 1324.1,749.0 1226.7,362.4 1218.0,308.6 1227.5,268.5 1235.2,241.8 944.5,135.9 932.7,176.4 555.4,240.4 555.6,275.3 537.3,399.1 537.0,399.8 196.7,380.6 376.5,656.5 338.6,701.0 419.9,715.8 1.0,1842.6 1.0,1912.0 20.0,1912.0 81.9,1786.1 318.4,1879.8 1371.3,1884.8 1552.4,1845.5 1566.0,1813.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[944.0,122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92168417435683,42.47504408513307]}},{"type":"Feature","properties":{"resourceCoords":[38.0,1738.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92627035101991,42.4756980870705]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p4","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"484.8,1912.0 510.3,1857.3 1251.1,1852.5 1295.6,1910.8 1280.1,1249.5 1289.4,1252.3 1369.0,740.0 1380.2,744.0 1449.1,240.2 793.0,1.0 728.6,1.0 725.1,23.1 694.5,136.6 577.0,448.0 420.2,389.1 212.0,305.8 209.2,314.0 203.1,332.5 191.9,372.8 198.6,427.8 281.9,823.6 339.9,1086.2 347.9,1122.0 381.2,1275.0 372.4,1278.0 479.6,1912.0 484.8,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[577.0,448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.921752,42.473742]}},{"type":"Feature","properties":{"resourceCoords":[722.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.923063,42.473095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1553.3,1152.2 1576.1,1268.8 1583.2,1410.2 1576.8,1532.4 1562.5,1644.9 1551.5,1677.4 1491.5,1643.9 1496.1,1878.6 1247.4,1829.3 1088.4,1877.8 280.9,1881.3 89.1,1842.4 53.0,1788.0 82.1,1129.5 91.2,1132.9 204.7,628.8 215.6,633.5 318.1,137.1 383.4,166.1 440.6,190.3 499.3,201.5 603.6,174.4 691.0,136.0 729.6,119.1 884.9,105.1 1192.3,66.0 1321.8,38.2 1382.0,188.8 1493.8,511.9 1533.3,599.8 1546.7,629.4 1370.5,702.1 1379.9,725.3 1553.3,1152.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[679.0,797.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92163184866895,42.47127293580867]}},{"type":"Feature","properties":{"resourceCoords":[520.0,1274.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92287852613654,42.47117597056249]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"210.8,1796.1 590.7,1879.2 1530.2,1879.5 1496.5,294.4 1577.9,87.6 1468.0,53.1 1500.7,1.0 1454.5,1.0 1310.8,4.1 970.8,185.2 601.3,396.7 460.4,468.9 321.3,528.1 286.4,542.1 210.9,571.6 107.9,611.8 116.9,635.2 210.9,880.4 282.7,1067.5 303.3,1185.0 307.6,1327.3 298.8,1449.9 282.2,1562.7 270.5,1595.1 210.8,1560.2 210.8,1796.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1212.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92227552387038,42.467391811008916]}},{"type":"Feature","properties":{"resourceCoords":[678.0,651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92017987897812,42.46921545952682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"357.6,1809.0 390.6,1686.7 394.5,1651.6 781.3,1631.8 798.0,1592.3 1077.7,1733.1 1278.3,1832.0 1429.8,1902.7 1570.7,1602.1 1609.8,1491.6 1612.0,1482.6 1612.0,1469.0 1612.0,1444.3 1571.5,1426.0 1339.9,1312.8 1298.8,1275.9 1263.9,1184.7 1249.9,996.1 1257.3,761.2 1269.2,654.7 1305.6,468.8 1330.1,381.4 1404.3,169.7 1485.0,5.8 1458.5,1.0 1452.2,1.0 1384.7,86.7 730.0,48.5 378.2,159.8 78.0,108.8 87.7,591.4 37.6,681.4 130.3,830.0 47.8,937.3 132.5,1033.6 61.5,1203.0 93.5,1290.8 9.7,1748.9 357.2,1809.7 357.6,1809.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[781.0,1587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92172278815346,42.47506744185557]}},{"type":"Feature","properties":{"resourceCoords":[1415.0,1911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.92178622855944,42.47376014834526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"541.6,1647.8 480.1,1650.5 478.9,1660.3 478.4,1664.6 473.8,1626.4 431.2,1613.1 186.4,1528.1 141.0,1496.3 95.2,1409.6 58.3,1223.1 37.3,987.9 36.3,880.2 50.0,690.3 64.0,600.2 112.3,380.1 173.0,206.8 175.3,200.6 140.4,204.8 216.8,79.5 396.4,76.1 411.8,40.3 452.6,141.9 861.0,407.3 967.5,357.0 1257.1,995.3 1601.5,1752.3 1612.0,1801.3 1584.6,1817.2 1501.5,1865.2 1400.2,1904.0 1340.2,1899.3 1280.5,1881.5 541.6,1647.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[624.0,508.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91777440643905,42.47416909217189]}},{"type":"Feature","properties":{"resourceCoords":[966.0,362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91716700134361,42.47365767035631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Swampscott, Massachusetts | 1907 | sanborn03863_001 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"2026-10-19T15:34:07Z","modified":"2026-10-19T15:34:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1465.6 1612.0,1299.9 1580.0,1229.2 1562.8,1147.2 1451.7,1005.7 1398.4,884.1 1377.2,756.5 1371.5,637.7 1389.2,524.1 1426.7,414.3 1469.2,327.8 1546.5,223.0 1606.4,118.8 778.2,131.6 730.5,132.2 697.8,284.9 644.0,590.6 632.2,722.8 470.2,735.7 127.9,746.8 32.1,758.6 1.0,762.5 1.0,772.8 3.7,800.0 21.9,949.5 52.1,1104.4 152.6,1516.8 232.0,1892.6 279.9,1883.8 314.7,1877.3 235.6,1908.4 236.4,1912.0 457.1,1912.0 640.1,1829.4 770.0,1803.5 810.7,1758.6 921.2,1692.2 1134.3,1589.2 1274.0,1537.0 1394.7,1504.8 1578.0,1477.1 1612.0,1475.9 1612.0,1465.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038631907:03863_1907-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1070.0,132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91941026483647,42.472119116502306]}},{"type":"Feature","properties":{"resourceCoords":[246.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.91803562907259,42.46870535342909]}}]}}]}