{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03745_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Haverhill, Massachusetts | 1949 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"105"},{"label":"placed","value":"88"},{"label":"unplaced","value":"17"},{"label":"fit sources","value":"georef-snap 46, georef 45, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.78254,-71.07438 +/-256m); p11__2 (tier 1, 42.77383,-71.09400 +/-100m); p31__2 (tier 1, 42.76759,-71.10455 +/-100m); p57 (tier 1, 42.76543,-71.03646 +/-242m); p5__1 (tier 2, 42.77018,-71.09519 +/-126m); p73 (tier 1, 42.76967,-71.06873 +/-259m); p77 (tier 1, 42.74000,-71.04453 +/-254m); p78__2 (tier 4, 42.77516,-71.07862 +/-4877m); p80__1 (tier 1, 42.76933,-71.07956 +/-237m); p81 (tier 4, 42.77516,-71.07862 +/-4877m); p82 (tier 1, 42.76017,-71.08094 +/-256m); p83__1 (tier 1, 42.76124,-71.08298 +/-184m); p83__2 (tier 1, 42.77457,-71.08974 +/-184m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p1","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001","type":"ImageService3","width":1704,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1363.2,520.8 1399.8,575.3 1303.5,1121.2 1365.7,1145.1 1213.5,1383.8 1205.7,1898.5 1453.8,1979.0 -0.0,1979.0 0.0,0.0 1279.7,0.0 1214.3,167.1 1189.9,396.8 1363.2,520.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,1097.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.104283,42.765472]}},{"type":"Feature","properties":{"resourceCoords":[545.0,214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1067,42.767959]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010","type":"ImageService3","width":1705,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.7,223.1 -0.0,243.7 0.0,0.0 337.6,0.0 314.1,232.3 791.2,395.1 765.5,376.3 926.2,181.3 964.8,0.0 1705.0,0.0 1705.0,249.8 1365.5,1.9 1081.7,502.6 999.5,587.8 1402.8,961.1 1518.7,1119.8 1561.5,1288.6 1705.0,1267.7 1705.0,1979.0 -0.0,1979.0 -0.0,1519.1 187.2,1489.3 285.0,1155.5 120.7,223.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08723571078124,42.77513243355742]}},{"type":"Feature","properties":{"resourceCoords":[1705.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08329676241864,42.77589685855059]}},{"type":"Feature","properties":{"resourceCoords":[1705.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08209648175605,42.77251718169262]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08603543011866,42.77175275669945]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p11 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6812.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011","type":"ImageService3","width":1703,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"182.9,1694.4 272.7,1979.0 777.2,1734.7 1533.2,1675.6 1550.5,1094.8 1624.5,729.5 1096.9,732.9 1084.5,0.0 -0.0,-0.0 -0.0,337.3 69.8,338.4 98.4,1180.5 182.9,1694.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[846.0,1725.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091629,42.773388]}},{"type":"Feature","properties":{"resourceCoords":[423.0,468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094454,42.774469]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p12","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"26"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012","type":"ImageService3","width":1699,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"511.6,1979.0 493.7,1465.7 231.4,717.3 137.9,150.8 1336.0,0.6 1160.1,285.4 1366.5,413.8 1254.0,692.9 1416.2,862.4 1456.8,1068.5 1118.9,1027.8 1027.9,1467.9 1406.8,1512.1 1349.6,1952.9 511.6,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[231.0,717.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089576,42.775709]}},{"type":"Feature","properties":{"resourceCoords":[1407.0,1512.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0888394,42.7732575]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p13","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013","type":"ImageService3","width":1703,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1979.0 -0.0,1901.7 34.5,1910.8 146.8,1485.0 -0.0,946.2 -0.0,552.0 236.2,615.6 385.6,19.2 774.1,46.3 722.8,319.1 1477.2,629.4 1460.8,1008.0 1415.5,1192.2 1335.9,1134.4 960.8,1328.2 1062.9,1979.0 211.1,1979.0 169.6,1906.6 -0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1040.0,942.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091559,42.778639]}},{"type":"Feature","properties":{"resourceCoords":[1573.0,1510.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089996,42.777899]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p14","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014","type":"ImageService3","width":1695,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.0,1772.6 127.8,1806.6 114.4,1264.2 285.8,260.5 968.2,613.1 1157.2,0.0 1593.0,0.0 1629.9,86.2 1641.1,809.2 1533.4,912.5 1494.0,1324.6 943.9,1467.3 289.0,1772.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1221.0,1003.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089816,42.7766586]}},{"type":"Feature","properties":{"resourceCoords":[118.0,1155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0915871,42.7751534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"154.0,1575.3 195.7,1302.5 -0.0,1311.2 -0.0,-0.0 1690.0,0.0 1690.0,1454.8 922.4,1502.9 925.5,1529.5 919.0,1859.2 154.0,1575.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09380091947018,42.78222401646998]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08985601620128,42.78284847537466]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0888666922668,42.77943403223628]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09281159553571,42.77880957333161]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016","type":"ImageService3","width":1700,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1580.5,0.0 1572.5,1743.0 824.9,1669.2 505.8,1587.9 161.6,933.6 209.0,749.9 249.5,0.0 1580.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09147554113743,42.77988395212105]}},{"type":"Feature","properties":{"resourceCoords":[1700.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08757423723723,42.78063939146395]}},{"type":"Feature","properties":{"resourceCoords":[1700.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08638448580255,42.77728242587628]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09028578970275,42.776526986533376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017","type":"ImageService3","width":1694,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.9,1872.4 12.7,1809.4 0.0,1838.0 0.0,1338.3 225.5,1285.9 864.5,264.2 1174.9,0.0 1332.0,0.0 1357.8,320.6 1668.4,1725.5 307.2,1892.9 146.9,1872.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08958508417025,42.775048318586926]}},{"type":"Feature","properties":{"resourceCoords":[1694.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0892909464009,42.77805744684803]}},{"type":"Feature","properties":{"resourceCoords":[1694.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08453521004452,42.77780344405052]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08482934781388,42.774794315789414]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018","type":"ImageService3","width":1681,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.1,168.9 465.9,123.1 1514.0,134.9 1483.2,303.9 1484.6,1473.6 1070.8,1396.8 988.1,1163.5 296.7,1408.7 133.1,168.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08543414539105,42.77811022688621]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08139698959204,42.77785858243088]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08179777197321,42.7743453214227]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08583492777223,42.77459696587803]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019","type":"ImageService3","width":1674,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"700.2,1979.0 721.4,1381.1 578.0,1396.8 479.8,1125.3 41.9,681.6 128.3,598.1 428.3,110.1 1115.4,593.0 1522.1,653.4 1505.3,1379.7 1446.1,1380.3 1534.2,1979.0 700.2,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08514038084417,42.77570956084813]}},{"type":"Feature","properties":{"resourceCoords":[1674.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08129333753735,42.7765648276514]}},{"type":"Feature","properties":{"resourceCoords":[1674.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07992553766925,42.77320291199024]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08377258097607,42.77234764518697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p2","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002","type":"ImageService3","width":1703,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1605.6,1056.1 1623.1,1928.3 1703.0,1921.8 1703.0,1979.0 -0.0,1979.0 -0.0,1176.2 488.5,1171.7 -0.0,1018.2 6.1,-0.0 1520.8,0.0 1489.9,169.3 1605.6,1056.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1084.0,1373.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.097093,42.764854]}},{"type":"Feature","properties":{"resourceCoords":[746.0,70.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.099469,42.766462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020","type":"ImageService3","width":1669,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"958.9,41.5 1669.0,229.4 1669.0,1979.0 923.8,1979.0 931.9,1919.8 209.0,1796.3 228.8,570.1 144.1,564.8 217.6,213.5 -0.0,108.9 -0.0,0.0 557.6,-0.0 958.9,41.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07753478946417,42.777049388996005]}},{"type":"Feature","properties":{"resourceCoords":[1669.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07585098493549,42.774393512667274]}},{"type":"Feature","properties":{"resourceCoords":[1669.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0801112036471,42.77291764798221]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08179500817579,42.77557352431094]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p21","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021","type":"ImageService3","width":1680,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"430.4,1343.5 72.5,439.8 -0.0,472.6 -0.0,343.2 181.4,340.8 165.4,229.1 656.6,96.4 1575.9,87.5 1401.7,702.2 1680.0,767.9 1680.0,894.6 1076.3,778.9 1062.5,851.5 1680.0,964.9 1680.0,1279.4 1609.9,1652.6 1680.0,1665.4 1680.0,1979.0 535.0,1979.0 468.4,1574.3 463.6,1574.6 430.4,1343.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[464.0,1575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07657,42.775093]}},{"type":"Feature","properties":{"resourceCoords":[1576.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0739981,42.7777]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022","type":"ImageService3","width":1697,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"670.1,885.9 -0.0,891.0 -0.0,818.2 608.9,818.2 589.5,695.4 343.1,713.6 302.6,683.8 358.8,57.5 126.4,96.9 132.5,0.0 1221.8,0.0 1200.2,107.4 1475.0,141.6 1433.2,708.2 1697.0,764.0 1697.0,1218.8 1652.4,1555.0 1697.0,1555.5 1697.0,1979.0 808.7,1866.3 750.9,1563.2 680.3,1563.8 670.1,885.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07481697859754,42.7779084443286]}},{"type":"Feature","properties":{"resourceCoords":[1697.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07083284112238,42.777394179931754]}},{"type":"Feature","properties":{"resourceCoords":[1697.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07164416067891,42.773959733606794]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07562829815407,42.77447399800364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p23","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"576.9,1532.1 546.5,738.5 279.6,706.9 267.5,137.5 -0.0,131.8 5.0,0.0 903.5,0.0 831.0,134.3 1323.2,181.2 1413.9,1979.0 661.0,1951.2 621.1,1528.5 576.9,1532.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[890.0,138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0699748,42.7769284]}},{"type":"Feature","properties":{"resourceCoords":[267.0,138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0714122,42.7772158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p24","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024","type":"ImageService3","width":1697,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,54.8 901.5,207.3 823.5,326.3 1018.2,358.8 1148.8,0.0 1697.0,0.0 1697.0,1979.0 -0.0,1979.0 -0.0,54.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1000.0,1842.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.067557,42.77316]}},{"type":"Feature","properties":{"resourceCoords":[98.0,69.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.068777,42.776592]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1280.8,1842.9 338.9,1723.2 326.4,210.0 1088.1,268.6 1388.1,251.7 1385.7,664.0 1280.8,1842.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08861036631097,42.7804520350901]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08467479271081,42.781176251106906]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08352541645995,42.77776372982783]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08746099006011,42.777039513811026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026","type":"ImageService3","width":1695,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1651.4,976.0 1389.9,1886.6 262.7,1706.0 121.1,222.8 1373.7,221.6 1442.8,1014.9 1651.4,976.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08546595503995,42.78080785028899]}},{"type":"Feature","properties":{"resourceCoords":[1695.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08141151742196,42.781017518726415]}},{"type":"Feature","properties":{"resourceCoords":[1695.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08108033062696,42.77751852750998]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08513476824496,42.777308859072555]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p27","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1344.6,267.7 1647.0,338.0 1504.9,343.4 1310.1,1471.0 1683.0,1524.7 1657.7,1979.0 911.4,1979.0 826.9,1639.0 749.6,1670.1 254.9,608.8 185.3,409.1 182.5,183.3 1344.6,267.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[856.0,744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080785,42.776467]}},{"type":"Feature","properties":{"resourceCoords":[1310.0,1471.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079003,42.777266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028","type":"ImageService3","width":1695,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1647.1 373.8,1661.4 416.8,1202.5 44.0,1133.8 283.4,0.0 426.4,0.0 1207.8,189.7 1540.4,1070.2 1695.0,1828.3 0.0,1848.8 0.0,1647.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08172607454811,42.77713058260241]}},{"type":"Feature","properties":{"resourceCoords":[1695.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0818416727478,42.78014283830737]}},{"type":"Feature","properties":{"resourceCoords":[1695.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07708362658164,42.78024260060384]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07696802838196,42.77723034489888]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p29","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1246.2,1828.5 465.8,1853.4 95.2,1943.8 107.2,429.5 1678.8,0.0 1479.2,1000.1 1246.2,1828.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1156.0,726.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074882,42.779646]}},{"type":"Feature","properties":{"resourceCoords":[91.0,1694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.077357,42.777859]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p3","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003","type":"ImageService3","width":1704,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1704.0,1979.0 -0.0,1979.0 -0.0,1533.5 49.2,1070.4 9.5,254.6 79.2,50.1 127.8,0.0 1599.0,0.0 1427.4,976.1 1704.0,962.5 1704.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[382.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096633,42.766972]}},{"type":"Feature","properties":{"resourceCoords":[55.0,1016.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096614,42.765984]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p30","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.2,1846.4 368.4,1082.2 366.1,59.1 309.8,70.5 366.0,41.5 1141.9,33.1 1498.5,727.5 1563.9,1049.8 1391.1,1862.0 311.2,1846.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[535.0,1907.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0739981,42.7777]}},{"type":"Feature","properties":{"resourceCoords":[366.0,42.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.073686,42.780998]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p31 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6756.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"354.8,1776.3 1213.8,1924.8 1510.2,801.2 1527.5,67.3 1558.6,0.0 222.9,0.0 554.3,803.9 569.1,1015.5 354.8,1776.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1080.0,796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.069922,42.779214]}},{"type":"Feature","properties":{"resourceCoords":[1080.0,20.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.069741,42.780612]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p32 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6784.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1630.9,1979.0 1696.0,1655.3 1696.0,420.4 1040.4,420.5 1040.2,0.0 548.5,0.0 561.0,76.5 -0.0,165.7 95.5,521.9 129.5,1773.8 72.9,1855.4 1489.3,1847.4 1431.3,1979.0 1630.9,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[665.0,1844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.068777,42.776592]}},{"type":"Feature","properties":{"resourceCoords":[523.0,422.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.067825,42.779013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p32 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4160.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2623.2"},{"label":"split_canvas_h","value":"1682.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1696.0,-0.0 1106.7,-0.0 1093.2,42.6 1129.5,420.5 1696.0,420.4 1696.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1040.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06875538705718,42.780545189709564]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06720695675521,42.780286867979754]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,420.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06743070383217,42.779554066844454]}},{"type":"Feature","properties":{"resourceCoords":[1040.2,420.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06897913413414,42.779812388574264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p33","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"344.6,433.4 753.8,401.9 1026.5,328.0 1477.2,407.3 1409.9,886.4 1452.6,1466.0 334.7,1697.0 344.6,433.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[488.0,1816.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08143,42.779027]}},{"type":"Feature","properties":{"resourceCoords":[966.0,341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080868,42.781759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p34 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4814.8"},{"label":"split_canvas_w","value":"6796.0"},{"label":"split_canvas_h","value":"3101.2"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034","type":"ImageService3","width":1699,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1736.5 179.8,1726.0 174.3,1979.0 1699.0,1979.0 1699.0,1216.0 0.0,1203.7 -0.0,1736.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[571.0,1722.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0642303,42.7715098]}},{"type":"Feature","properties":{"resourceCoords":[155.0,1722.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.06489,42.770948]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p34 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6796.0"},{"label":"split_canvas_h","value":"4864.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034","type":"ImageService3","width":1699,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"371.7,590.2 522.7,1153.9 1267.5,958.9 1320.7,592.8 1437.3,578.2 1334.6,527.5 1375.9,309.1 1480.0,369.4 1699.0,151.6 1699.0,0.0 1385.3,0.0 1390.0,83.8 348.0,105.0 371.7,590.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[777.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07858,42.781772]}},{"type":"Feature","properties":{"resourceCoords":[348.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079617,42.781791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.1,1525.3 225.4,1508.8 121.0,1459.8 159.0,1240.5 264.9,1299.1 1445.7,87.5 1357.3,0.0 1636.2,0.0 1608.2,1397.6 66.7,1970.3 54.8,1818.6 108.1,1525.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07740196271199,42.78359346971372]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07336682128746,42.78346912178585]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07356464690054,42.77996210253899]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07759978832506,42.78008645046686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p36","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1684.0,1979.0 104.5,1861.1 107.0,340.9 305.4,113.7 550.2,860.8 903.3,471.2 887.1,421.4 1096.1,233.2 1171.1,418.4 1684.0,1216.8 1684.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[107.0,341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.073467,42.783676]}},{"type":"Feature","properties":{"resourceCoords":[887.0,421.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.071606,42.783454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p37","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"402.8,891.8 527.5,306.4 1684.0,271.8 1684.0,1548.4 308.8,1565.9 414.4,1457.1 189.2,1238.7 316.8,1081.2 402.8,891.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1218.0,795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.076003,42.783748]}},{"type":"Feature","properties":{"resourceCoords":[436.0,795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0773926,42.7828071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p38","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038","type":"ImageService3","width":1686,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.5,1190.3 173.7,54.3 494.5,54.7 1471.8,57.4 1686.0,149.3 1686.0,1406.4 1140.3,1962.3 865.2,1934.3 839.5,1979.0 322.5,1979.0 705.2,1307.2 408.6,1312.7 324.4,1388.8 138.5,1190.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[389.0,574.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074767,42.784598]}},{"type":"Feature","properties":{"resourceCoords":[813.0,1306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.072773,42.784193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p39","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039","type":"ImageService3","width":1695,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"631.2,0.0 1655.6,0.0 1655.8,0.0 1695.0,0.0 1695.0,765.7 1594.3,777.5 1530.6,1176.7 1563.4,1810.2 1262.8,1802.0 508.7,1679.1 631.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1534.0,1118.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.085832,42.781753]}},{"type":"Feature","properties":{"resourceCoords":[911.0,1742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086763,42.780355]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p4","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004","type":"ImageService3","width":1704,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1704.0,1173.0 -0.0,1563.2 -0.0,349.8 729.8,67.9 946.8,24.0 1188.7,48.1 1459.0,0.0 1426.0,95.7 1704.0,160.4 1704.0,1173.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[776.0,547.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.093468,42.769764]}},{"type":"Feature","properties":{"resourceCoords":[1162.0,513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.092684,42.770131]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p40","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"321.1,1488.2 271.4,746.9 323.3,347.8 1431.5,197.5 1455.2,642.5 1421.7,646.7 1187.8,1700.0 321.1,1488.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[877.0,1618.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.083768,42.780508]}},{"type":"Feature","properties":{"resourceCoords":[584.0,316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08539,42.782547]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p41","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"5"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"503.6,1668.1 175.6,1538.9 560.7,534.6 594.4,535.4 636.4,93.2 1323.1,95.0 1267.5,1306.3 1046.2,1303.3 643.6,1215.5 503.6,1668.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1284.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081211,42.78234]}},{"type":"Feature","properties":{"resourceCoords":[504.0,1668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.082143,42.780586]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p42","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.2,90.8 1501.2,95.2 1514.2,0.0 1649.5,1410.8 1614.8,1717.3 1503.8,1979.0 1435.3,1979.0 107.2,1296.2 173.2,90.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[911.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079894,42.783535]}},{"type":"Feature","properties":{"resourceCoords":[747.0,1134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079655,42.782528]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1550.5,1765.3 43.7,1769.5 332.8,388.0 1539.5,336.6 1550.5,1765.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08102068555759,42.78572919914325]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07816273572472,42.78777240630484]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07490230829566,42.785281254801646]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07776025812854,42.783238047640054]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044","type":"ImageService3","width":1666,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"390.0,126.9 1274.9,92.7 1286.0,0.0 1666.0,0.0 1666.0,1979.0 1430.4,1979.0 1427.3,1979.0 1231.7,1979.0 1231.4,1885.4 1009.7,1781.0 -0.0,1774.5 -0.0,143.5 140.8,137.2 140.1,228.0 390.1,219.5 390.0,126.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07840385217987,42.787601132635814]}},{"type":"Feature","properties":{"resourceCoords":[1666.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07560124893735,42.789635860420525]}},{"type":"Feature","properties":{"resourceCoords":[1666.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07233086562988,42.787175431220575]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07513346887241,42.785140703435864]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045","type":"ImageService3","width":1676,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"310.6,67.6 1429.2,98.9 1429.5,1805.4 197.2,1703.0 310.6,67.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08329347791023,42.78610302296859]}},{"type":"Feature","properties":{"resourceCoords":[1676.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08156583201685,42.78341322476927]}},{"type":"Feature","properties":{"resourceCoords":[1676.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.085863069418,42.781905477177254]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08759071531138,42.784595275376574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p46","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046","type":"ImageService3","width":1668,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"255.4,131.8 1448.2,136.6 1495.2,1838.7 151.8,1824.0 255.4,131.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[904.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080417,42.784324]}},{"type":"Feature","properties":{"resourceCoords":[1055.0,135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081946,42.7871095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047","type":"ImageService3","width":1681,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"717.0,64.7 1681.0,119.2 1658.9,1873.2 1408.0,1873.0 1403.5,1979.0 46.6,1979.0 563.3,419.4 717.0,64.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08326522984679,42.78795509522539]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08054374713613,42.790073788876896]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07716876767518,42.78770591387716]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07989025038583,42.78558722022566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.4,114.9 1024.8,188.2 911.9,0.0 1678.0,0.0 1678.0,1887.5 1471.8,1840.1 1478.2,1673.8 1103.2,1659.4 1088.8,1750.4 214.2,1750.8 238.4,114.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08093059454679,42.789764085748544]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07818192265957,42.79191859686322]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07474365563972,42.78952285670121]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07749232752694,42.787368345586536]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1426.6,0.0 1575.6,746.0 1604.2,1648.1 571.8,1687.6 562.8,1979.0 65.6,1979.0 88.0,1694.6 -0.0,1687.6 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09120960906183,42.78566363065363]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08737865085152,42.78650727332925]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08603244082823,42.7831679320152]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08986339903855,42.782324289339584]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p50","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050","type":"ImageService3","width":1676,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2.5,1847.9 46.5,1429.6 -0.0,816.3 -0.0,-0.0 1669.6,0.0 1634.8,1923.1 2.5,1847.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[106.0,1045.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.087355,42.785861]}},{"type":"Feature","properties":{"resourceCoords":[1002.0,1911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.084525,42.785113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051","type":"ImageService3","width":1682,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.3,1842.5 232.0,487.4 -0.0,475.9 -0.0,-0.0 1682.0,0.0 1367.4,899.2 1328.9,1270.3 1337.7,1848.0 145.3,1842.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08597134401877,42.78927095868593]}},{"type":"Feature","properties":{"resourceCoords":[1682.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08237249478837,42.79062047327715]}},{"type":"Feature","properties":{"resourceCoords":[1682.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0802240423988,42.787491116290525]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0838228916292,42.786141601699306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.3,1979.0 117.0,1468.5 121.9,1483.1 111.9,1188.5 72.1,992.0 100.1,811.9 136.0,0.0 1657.0,0.0 1657.0,1963.5 1622.0,1979.0 1040.3,1236.2 738.5,1472.5 841.1,1511.8 142.8,1979.0 114.3,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0839753483003,42.795679222884985]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07615649817326,42.7965552945034]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07474063372557,42.78965436812274]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0825594838526,42.788778296504326]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053","type":"ImageService3","width":1668,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 1115.5,0.0 1149.5,90.8 1369.8,0.0 1503.1,0.0 1622.2,27.9 1628.6,0.0 1668.0,6.3 1668.0,60.9 1616.8,52.0 1441.2,853.5 1382.4,1028.0 1388.1,1230.2 1347.3,1525.0 1345.0,1509.6 500.6,1635.3 536.1,1874.2 -0.0,1926.9 -0.0,1592.8 19.3,1537.2 -0.0,1528.7 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09066119700097,42.794136829981085]}},{"type":"Feature","properties":{"resourceCoords":[1668.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08318158481147,42.79598008097743]}},{"type":"Feature","properties":{"resourceCoords":[1668.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08022230081797,42.78942200552916]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08770191300746,42.78757875453282]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p54 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3212.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054","type":"ImageService3","width":1668,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 -0.0,1796.2 547.1,1979.0 715.2,1897.9 722.4,630.2 803.0,619.3 802.8,0.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[265.0,821.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0964399,42.8010581]}},{"type":"Feature","properties":{"resourceCoords":[82.0,821.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0969973,42.8005631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p54 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"2858.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3813.2"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054","type":"ImageService3","width":1668,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1511.8,1793.1 1602.9,1253.2 1668.0,593.8 1589.3,200.1 968.5,0.0 802.8,0.0 803.0,619.3 722.4,630.2 718.5,1311.3 1511.8,1793.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1077.4,761.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0908381,42.7965575]}},{"type":"Feature","properties":{"resourceCoords":[1493.1,1886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.085371,42.795106]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p55","metadata":[{"label":"streets","value":"19"},{"label":"intersections","value":"26"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055","type":"ImageService3","width":1667,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,876.0 -0.0,444.8 216.8,457.4 246.9,230.9 -0.0,132.9 -0.0,0.0 1667.0,0.0 1667.0,1941.7 1365.2,1822.0 1350.7,1823.8 1391.0,1979.0 -0.0,1979.0 -0.0,1654.6 56.8,1662.5 79.0,1495.3 46.2,863.5 -0.0,876.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1042.0,995.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0522247,42.7667725]}},{"type":"Feature","properties":{"resourceCoords":[425.0,1480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0559868,42.7663675]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056","type":"ImageService3","width":1678,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1560.9,255.3 1678.0,331.1 1678.0,1976.0 0.0,1979.0 0.0,-0.0 916.0,0.0 717.3,287.1 1576.5,511.3 1560.9,255.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05405966818836,42.760619941117525]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05197977133328,42.76620162204732]}},{"type":"Feature","properties":{"resourceCoords":[1678.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04307616978004,42.764387991742424]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04515606663512,42.75880631081263]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1559.7,1979.0 -0.0,1979.0 -0.0,325.4 177.4,189.3 32.2,0.0 1335.1,0.0 1511.1,648.6 1568.0,649.0 1559.7,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1144.0,1572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089612,42.76394]}},{"type":"Feature","properties":{"resourceCoords":[1568.0,649.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.088578,42.7655885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.2,615.0 1363.7,587.9 1448.0,1082.5 1683.0,1109.3 1683.0,1818.2 1683.0,1818.4 1683.0,1979.0 835.9,1979.0 827.5,1953.8 781.9,1966.8 0.0,695.0 0.0,-0.0 306.3,0.0 303.8,25.6 1632.5,164.6 1584.2,615.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08859166452582,42.762669905407485]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08898386064213,42.76564962599982]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08424474955193,42.7659905874648]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08385255343562,42.76301086687246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p5 [2]","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"22"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6772.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005","type":"ImageService3","width":1693,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"494.2,194.2 533.0,256.4 147.9,361.6 46.4,-0.0 -0.0,0.0 0.0,1692.9 417.5,1700.9 409.1,1979.0 560.0,1979.0 663.9,1795.8 713.6,1754.1 1260.1,1791.8 1277.2,1728.1 1523.6,1853.2 1450.0,1093.9 1390.0,1060.0 1284.8,442.4 1217.3,475.8 1050.6,32.8 742.1,86.1 229.9,100.5 265.4,136.5 494.2,194.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[892.0,1762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.102048,42.76797]}},{"type":"Feature","properties":{"resourceCoords":[677.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0995856,42.769744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006","type":"ImageService3","width":1704,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"407.4,1877.7 157.4,1898.0 216.6,1281.1 456.4,296.2 369.1,344.6 187.1,706.0 -0.0,801.0 -0.0,0.0 1393.4,0.0 1460.0,987.1 1640.0,1649.0 1079.2,1979.0 766.0,1979.0 407.4,1877.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09773503929839,42.772526889932465]}},{"type":"Feature","properties":{"resourceCoords":[1704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09473523193392,42.77457487390979]}},{"type":"Feature","properties":{"resourceCoords":[1704.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09151773496203,42.77199941762753]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09451754232649,42.769951433650206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"424.1,1979.0 487.4,1767.9 -0.0,1630.2 -0.0,-0.0 1472.4,0.0 1482.4,105.8 1688.0,100.0 1680.6,1871.8 987.2,1753.7 921.9,1979.0 424.1,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08975521088188,42.76840995089575]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08580471952794,42.76920506415046]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08454381776204,42.76578097108737]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08849430911597,42.76498585783266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"509.7,1147.0 352.8,1120.0 361.9,43.2 432.0,12.1 1482.7,16.0 1496.0,1507.7 504.0,1954.0 367.3,1975.0 509.7,1147.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08617248189863,42.76773323293426]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08223460899995,42.76853060437717]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08096638247338,42.7651072733531]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08490425537205,42.764309901910195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"372.6,491.6 742.0,527.6 747.6,0.0 827.7,0.0 1492.9,586.9 1271.8,835.8 1185.8,1958.0 263.5,1979.0 372.6,491.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08395059323132,42.769007614679985]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08008435689001,42.77004905289921]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07844059784429,42.76671383934485]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0823068341856,42.76567240112563]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.5,1082.7 -0.0,1067.1 0.0,0.0 1685.0,0.0 1685.0,53.4 1567.2,53.5 1568.6,1166.9 1685.0,1178.4 1639.4,1894.7 214.2,1752.7 141.1,1777.4 206.5,1082.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08712372112097,42.77070347671659]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08332535847721,42.771760139171874]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08164663734186,42.76846217508277]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08544499998563,42.767405512627484]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1696.0,0.0 1696.0,712.2 1527.2,1979.0 886.8,1979.0 163.9,1324.5 90.0,1323.6 117.6,1136.8 -0.0,1125.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08354549686048,42.77159711643729]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07976345674567,42.772653199103594]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07809651311567,42.769390755415316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08187855323048,42.76833467274901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1454.8,547.3 1602.2,1027.9 1638.7,1462.3 1683.0,1457.9 1643.2,1548.5 1678.8,1979.0 1665.8,1946.7 0.0,1925.7 0.0,242.3 879.8,184.1 1228.5,113.5 1454.8,547.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08239482985611,42.763125314455735]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08309357828428,42.76606455576324]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0784188027685,42.766672017156864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07772005434033,42.763732775849356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"33.4,173.6 639.9,0.0 1326.5,0.0 1690.0,574.5 1690.0,1068.2 1417.6,1225.4 1235.2,1383.0 818.8,1979.0 -0.0,1979.0 -0.0,1819.4 39.5,1833.7 33.4,173.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07863428892445,42.76693031268485]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07458094565199,42.76740671140239]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07382637994316,42.763897535946036]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07787972321562,42.7634211372285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p67","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1480.5,1433.4 1108.6,1734.0 616.7,1979.0 520.8,1979.0 16.4,971.8 78.1,676.8 147.7,690.1 679.0,351.8 587.6,159.8 995.0,0.0 1317.8,0.0 1683.0,60.4 1683.0,1356.6 1480.5,1433.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[904.0,835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0781764,42.768362]}},{"type":"Feature","properties":{"resourceCoords":[539.0,2015.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079621,42.766436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068","type":"ImageService3","width":1708,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1342.3,1979.0 827.8,1733.8 324.4,1745.0 223.8,691.6 62.0,1.5 1623.4,0.0 1688.3,1537.6 1433.3,1979.0 1342.3,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07991103274176,42.77264151825806]}},{"type":"Feature","properties":{"resourceCoords":[1708.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07585524108374,42.77303574194369]}},{"type":"Feature","properties":{"resourceCoords":[1708.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07523735592017,42.76956176893389]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07929314757818,42.769167545248266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"284.9,164.2 1120.0,173.8 1092.2,838.2 1504.9,822.0 1182.7,1944.9 913.8,1836.5 691.6,1979.0 486.3,1979.0 240.8,813.8 168.9,817.1 246.9,770.0 247.3,347.9 206.6,193.8 284.9,164.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07569267768734,42.770916725823454]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07200469341802,42.769723117280876]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07389758604302,42.766526639403985]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07758557031234,42.76772024794656]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p7","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"25"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007","type":"ImageService3","width":1705,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.6,960.8 1042.4,338.2 1431.0,269.8 1548.3,1097.0 1536.0,1807.8 -0.0,1083.5 39.3,992.0 -0.0,961.8 67.6,960.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1547.0,1097.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089673,42.77276]}},{"type":"Feature","properties":{"resourceCoords":[497.0,1323.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091259,42.77125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070","type":"ImageService3","width":1710,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"590.7,676.5 178.8,710.5 178.1,45.2 1523.7,94.7 1532.4,0.0 1710.0,0.0 1710.0,1728.0 1445.3,1709.2 1296.8,1979.0 677.3,1979.0 317.0,1812.8 590.7,676.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07374572147693,42.77005374077945]}},{"type":"Feature","properties":{"resourceCoords":[1710.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07008513488543,42.768727471993074]}},{"type":"Feature","properties":{"resourceCoords":[1710.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0721613172834,42.7655955127912]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0758219038749,42.76692178157758]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p71","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071","type":"ImageService3","width":1691,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.5,1494.8 110.3,30.7 -0.0,-0.0 1691.0,0.0 1691.0,873.3 892.7,1973.5 128.5,1494.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[566.0,1750.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074282,42.77014]}},{"type":"Feature","properties":{"resourceCoords":[643.0,973.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0744071,42.7715226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072","type":"ImageService3","width":1712,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"377.1,1927.8 263.7,570.1 -0.0,266.1 -0.0,0.0 1712.0,0.0 1712.0,1854.8 377.1,1927.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07177708295784,42.773114586803196]}},{"type":"Feature","properties":{"resourceCoords":[1712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06826651050808,42.77153368112413]}},{"type":"Feature","properties":{"resourceCoords":[1712.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07073853790544,42.768533726486154]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0742491103552,42.77011463216522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074","type":"ImageService3","width":1704,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1704.0,-0.0 1704.0,1979.0 1536.8,1979.0 1540.7,1859.5 1388.0,1858.1 777.5,1886.6 661.4,1976.7 269.9,1934.8 262.5,1979.0 -0.0,1979.0 0.0,-0.0 1704.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02745227931489,42.765430152701235]}},{"type":"Feature","properties":{"resourceCoords":[1704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02551032286065,42.76275431416444]}},{"type":"Feature","properties":{"resourceCoords":[1704.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0297136054698,42.76108682428049]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03165556192403,42.763762662817285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p75","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1058.4 -0.0,634.7 79.0,597.0 -0.0,460.9 -0.0,-0.0 1688.0,0.0 1688.0,146.2 1424.6,146.2 1423.0,412.2 1467.9,422.0 1420.2,780.7 1452.5,897.3 1513.8,940.5 1536.6,1720.2 1415.0,1719.1 1414.0,1887.1 1688.0,1887.1 1688.0,1979.0 360.9,1979.0 301.3,1915.3 315.0,1043.5 -0.0,1058.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[315.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.032959,42.761469]}},{"type":"Feature","properties":{"resourceCoords":[1533.0,1370.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.030049,42.761978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076","type":"ImageService3","width":1700,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"641.1,0.0 1359.5,359.4 1486.2,348.1 1660.1,0.0 1700.0,0.0 1700.0,1979.0 -0.0,1979.0 0.0,-0.0 153.6,0.0 152.1,85.5 522.8,267.9 641.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03425880360938,42.76211614331559]}},{"type":"Feature","properties":{"resourceCoords":[1700.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0308995419214,42.760361763298924]}},{"type":"Feature","properties":{"resourceCoords":[1700.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03366169608675,42.75747032892292]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03702095777473,42.759224708939584]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p78 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6872.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078","type":"ImageService3","width":1718,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1718.0,0.0 -0.0,-0.0 -0.0,1979.0 983.7,1979.0 970.0,1009.7 1718.0,1005.9 1718.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__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":[-71.04484287114593,42.74182225738574]}},{"type":"Feature","properties":{"resourceCoords":[1718.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04090902851512,42.7408640263609]}},{"type":"Feature","properties":{"resourceCoords":[1718.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04240960737086,42.73753073207959]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04634345000167,42.73848896310443]}},{"type":"Feature","properties":{"resourceCoords":[421.0,591.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.044327,42.740592]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p79 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3740.4"},{"label":"split_canvas_w","value":"6752.0"},{"label":"split_canvas_h","value":"4175.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1179.0,1979.0 1406.0,1979.0 1688.0,1979.0 1688.0,935.1 1097.2,936.0 1097.2,1379.9 0.0,1515.9 -0.0,1979.0 1179.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1368.0,1412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0360645,42.7653746]}},{"type":"Feature","properties":{"resourceCoords":[647.0,2490.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.041242,42.763124]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p79 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6752.0"},{"label":"split_canvas_h","value":"6063.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"404.5,374.2 259.9,1349.2 1097.2,1262.6 1097.2,936.0 1688.0,935.1 1688.0,873.0 1547.7,862.6 1611.2,0.0 0.0,-0.0 -0.0,314.2 404.5,374.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[877.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.045718,42.766914]}},{"type":"Feature","properties":{"resourceCoords":[-11.0,1494.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.051033,42.765579]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p8","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008","type":"ImageService3","width":1707,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"413.9,223.9 1707.0,522.9 1707.0,959.0 1470.5,1008.7 1457.4,1230.3 1707.0,1245.0 1707.0,1979.0 -0.0,1979.0 -0.0,1321.5 405.7,1232.1 413.9,223.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091709,42.770319]}},{"type":"Feature","properties":{"resourceCoords":[690.0,289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091259,42.77125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p80 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"3238.4"},{"label":"split_canvas_y","value":"4390.4"},{"label":"split_canvas_w","value":"3585.6"},{"label":"split_canvas_h","value":"3525.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080","type":"ImageService3","width":1706,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1706.0,1097.6 1042.9,1100.3 810.8,1300.8 809.6,1979.0 1706.0,1979.0 1706.0,1097.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[809.6,1097.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10086116652474,42.75930282630164]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,1097.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09870327601081,42.75941856111409]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0985485703824,42.75785778867295]}},{"type":"Feature","properties":{"resourceCoords":[809.6,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10070646089633,42.757742053860504]}},{"type":"Feature","properties":{"resourceCoords":[1275.3,1659.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0996424,42.7583684]}},{"type":"Feature","properties":{"resourceCoords":[1275.3,1659.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0991665,42.7584134]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084","type":"ImageService3","width":1706,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"336.4,1979.0 383.9,781.9 317.6,543.5 1436.6,0.0 1564.6,0.0 1601.4,294.2 1595.5,1979.0 336.4,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08621969666292,42.76454505716703]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08225069932418,42.765268809387685]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08111514247825,42.76186476376674]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.085084139817,42.76114101154608]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"934.9,0.0 1696.0,0.0 1696.0,1693.4 1569.2,1710.3 1503.7,1979.0 1265.8,1979.0 1247.6,1753.1 802.9,1812.3 822.4,1858.4 175.7,1979.0 0.0,1979.0 -0.0,-0.0 140.9,0.0 131.3,131.9 925.6,178.5 934.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06524232355318,42.77059446333706]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06044505137177,42.77519833608471]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05317815523392,42.77106016339518]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05797542741533,42.766456290647525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086","type":"ImageService3","width":1706,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1706.0,0.0 1706.0,357.9 1586.2,385.3 1706.0,910.4 1706.0,1023.5 1634.8,1031.1 1638.7,1334.8 1517.5,1336.5 1561.2,1500.8 1706.0,1761.4 1706.0,1979.0 -0.0,1979.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1013912865248,42.783666372808796]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09320104263152,42.783585508973985]}},{"type":"Feature","properties":{"resourceCoords":[1706.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09332795137422,42.77656298612567]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1015181952675,42.77664384996048]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087","type":"ImageService3","width":1702,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,652.6 119.0,662.2 536.3,457.4 577.9,576.7 592.9,1188.1 1234.3,1146.8 1210.2,738.0 1702.0,739.8 1702.0,1192.9 1533.1,1391.8 1702.0,1535.2 1702.0,1647.9 1689.1,1667.2 1702.0,1675.3 1702.0,1979.0 -0.0,1979.0 -0.0,652.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08802634534216,42.764978972186505]}},{"type":"Feature","properties":{"resourceCoords":[1702.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08016210509706,42.76602251027173]}},{"type":"Feature","properties":{"resourceCoords":[1702.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0785209934974,42.75926168926856]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0863852337425,42.758218151183335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1979.0 -0.0,1208.7 23.9,1238.1 326.1,991.7 344.1,999.1 311.7,715.6 326.8,530.3 377.4,377.7 562.4,96.1 598.8,0.0 1690.0,0.0 1690.0,1979.0 -0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07495905127634,42.767307990021685]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06786281223467,42.764258904246105]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07269203522213,42.758115079788766]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0797882742638,42.761164165564345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089","type":"ImageService3","width":1675,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"435.9,1878.0 391.3,1224.2 193.0,871.8 101.5,0.0 1675.0,0.0 1675.0,1979.0 972.9,1979.0 928.6,1923.3 904.8,1963.0 728.8,1860.4 435.9,1878.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09229197458099,42.799493094493464]}},{"type":"Feature","properties":{"resourceCoords":[1675.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08590774456489,42.80295956837852]}},{"type":"Feature","properties":{"resourceCoords":[1675.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08036509172983,42.797385904860555]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08674932174593,42.7939194309755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p9","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009","type":"ImageService3","width":1705,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"209.8,1250.0 316.1,1263.2 132.1,566.2 568.0,452.9 466.3,81.0 913.3,0.0 1002.8,332.1 1180.6,216.2 1278.1,0.0 1705.0,0.0 1705.0,967.6 1646.4,1032.5 1550.4,1268.6 1360.3,1266.5 1280.3,1723.2 1705.0,1796.1 1705.0,1979.0 -0.0,1979.0 -0.0,1754.5 235.8,1690.3 209.8,1250.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,453.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0888394,42.7732575]}},{"type":"Feature","properties":{"resourceCoords":[1371.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086291,42.772546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"196.5,918.1 407.1,878.1 240.7,0.0 1690.0,0.0 1690.0,1979.0 57.7,1979.0 80.5,1842.5 308.3,1498.1 196.5,918.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07627843374021,42.78895428828506]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06956650668519,42.79226908063848]}},{"type":"Feature","properties":{"resourceCoords":[1690.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06431433419512,42.78646032971047]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07102626125014,42.78314553735706]}}]}}]}