{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03690_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Belmont, Massachusetts | 1915 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"23"},{"label":"placed","value":"16"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef-snap 9, georef 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 17 panels"},{"label":"unplaced pages","value":"p12__2 (tier 1, 42.39228,-71.15811 +/-100m); p13__1 (tier 1, 42.39148,-71.19016 +/-100m); p13__2 (tier 3, 42.39335,-71.19056 +/-785m); p13__3 (tier 1, 42.39353,-71.19233 +/-100m); p13__4 (tier 1, 42.38896,-71.19031 +/-100m); p3__1 (tier 1, 42.38807,-71.18371 +/-140m); p4__3 (tier 1, 42.38471,-71.18751 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p10 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.69"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5110.8"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"2541.2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.0,1912.0 225.7,1912.0 293.9,1912.0 394.3,1875.7 389.4,1809.3 568.0,1813.1 567.9,1817.8 797.9,1912.0 1023.0,1912.0 1030.0,1889.6 1039.3,1858.5 1222.7,1727.5 1445.0,1733.2 1488.9,1734.3 1389.8,1386.8 1281.3,1349.6 932.8,1337.9 590.8,1373.4 450.6,1356.3 401.4,1388.6 143.9,1421.6 132.5,1613.8 150.6,1614.0 136.0,1812.8 145.6,1812.8 142.0,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,1813.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1603615,42.378936]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,1733.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1559625,42.3790335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p10 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5110.8"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1216.3,1229.3 1382.9,1229.8 1526.6,1269.2 1564.5,1239.6 1536.8,1019.5 1564.9,797.0 1544.6,63.6 1242.8,65.8 1209.0,135.5 1065.8,156.4 968.4,129.4 653.5,136.7 590.4,100.4 184.0,36.9 73.4,64.2 25.3,717.9 37.9,1076.1 70.5,1230.0 478.4,1228.6 582.4,1253.1 806.3,1235.3 926.4,1272.4 1122.5,1231.3 1124.8,1256.9 1194.2,1260.5 1216.3,1229.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[865.0,1071.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.16975890935674,42.39040002327201]}},{"type":"Feature","properties":{"resourceCoords":[717.0,161.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.16878846319969,42.39384791830718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p11","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.76"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1277.5,1885.5 812.0,1840.4 547.3,1891.6 46.4,1868.8 25.1,537.9 68.0,304.7 126.4,292.7 136.7,47.0 1461.0,54.6 1577.1,278.4 1605.7,1109.9 1612.0,1109.6 1612.0,1149.2 1518.2,1249.1 1494.4,1288.7 1352.5,1912.0 1306.0,1912.0 1302.5,1912.0 1277.5,1885.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1700.0,1582.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.175489,42.3957725]}},{"type":"Feature","properties":{"resourceCoords":[785.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1755665,42.3990013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p12 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.73"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.5,1899.5 613.7,1808.3 956.5,1838.5 1004.8,1334.3 1581.5,1279.1 1544.3,73.8 1475.7,116.7 1358.6,48.2 979.1,118.1 651.8,16.6 58.0,39.9 41.0,1877.2 114.5,1899.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1356.0,534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.16160715792725,42.39437411081035]}},{"type":"Feature","properties":{"resourceCoords":[69.0,534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1625630056868,42.39203350953291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.1,1249.9 75.7,1269.2 34.5,1836.8 1.0,1841.2 1.0,1860.9 254.3,1856.9 257.6,1876.8 589.9,1820.6 703.6,1814.0 1533.8,1741.7 1509.3,1349.1 1534.4,1244.0 1473.0,1205.2 1612.0,771.4 1607.2,726.0 1604.0,726.0 1603.5,691.1 1568.5,683.7 1517.2,174.3 1413.5,43.9 1096.2,106.9 762.1,54.9 307.3,93.5 264.4,41.0 14.1,14.3 138.4,61.4 260.5,93.9 188.7,119.3 145.6,166.1 125.5,148.4 261.1,688.1 201.8,708.1 48.1,1249.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[179.0,1343.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.19204377984681,42.3866311975634]}},{"type":"Feature","properties":{"resourceCoords":[1507.0,1460.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.18874428755727,42.38684665975539]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p3 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3214.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3238.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1449.1,791.7 1448.1,767.3 1553.7,737.8 1612.0,717.7 1612.0,626.9 1556.1,616.5 1571.8,439.9 1520.1,69.1 1117.2,45.4 985.1,73.6 1007.6,257.3 983.5,320.3 982.0,802.2 920.5,921.4 853.7,928.9 885.1,949.3 853.7,1050.6 875.8,1145.9 853.7,1302.4 900.4,1553.1 852.9,1638.2 893.0,1646.2 1082.1,1778.8 1110.2,1754.8 1157.2,1782.8 1351.0,1830.0 1403.3,1587.2 1401.5,1562.8 1380.5,1532.2 1522.5,1426.4 1501.6,1399.3 1494.3,1373.9 1492.7,1310.3 1494.6,1162.7 1492.6,1077.5 1487.2,1008.5 1473.4,904.0 1449.1,791.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1362.2,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.18848328064254,42.38632865129467]}},{"type":"Feature","properties":{"resourceCoords":[1249.2,822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1843988103212,42.38834817348724]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p3 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.02"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3462.4"},{"label":"split_canvas_w","value":"3214.0"},{"label":"split_canvas_h","value":"1827.6"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.2,883.2 203.4,902.0 155.3,946.1 142.7,964.1 53.4,1254.9 29.6,1253.2 83.0,1318.4 650.2,1310.8 733.1,1240.4 742.4,1130.2 780.4,1102.6 742.5,1073.8 777.7,991.2 778.3,893.1 205.2,883.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[60.0,1057.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1761782,42.396286]}},{"type":"Feature","properties":{"resourceCoords":[229.8,1110.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.175489,42.3957725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p3 [4]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.42"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5290.0"},{"label":"split_canvas_w","value":"3214.0"},{"label":"split_canvas_h","value":"2362.0"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"695.0,1912.0 700.1,1912.0 755.6,1859.1 800.4,1853.4 671.2,1595.0 686.8,1567.0 448.7,1409.4 462.4,1409.2 462.6,1376.5 481.0,1342.1 423.4,1372.0 360.1,1397.2 333.1,1416.9 43.4,1417.3 24.4,1464.9 71.3,1560.2 46.6,1803.3 89.5,1892.2 695.0,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0003__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[134.9,1418.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1940021,42.3893451]}},{"type":"Feature","properties":{"resourceCoords":[755.5,1418.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1914618,42.3881585]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p4 [1]","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.79"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5539.2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.3,64.5 79.8,67.6 32.7,137.1 34.8,495.2 40.5,499.2 35.1,539.5 84.1,758.6 81.2,1307.3 215.4,1263.6 274.1,1296.0 775.4,1125.7 938.7,1124.7 1008.9,1092.3 1451.9,1132.2 1514.7,1086.3 1493.5,1004.3 1518.3,948.2 1458.4,901.4 1418.1,905.0 1416.5,842.0 1450.2,590.0 1490.0,349.9 1497.7,272.7 1407.7,189.6 1280.3,73.1 1254.8,98.7 1231.7,105.0 989.6,99.6 577.7,89.6 521.4,86.6 355.0,96.0 354.5,86.0 229.3,74.1 230.3,64.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[355.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1916193,42.385692]}},{"type":"Feature","properties":{"resourceCoords":[1490.0,349.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.185789,42.385981]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p4 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1526.0"},{"label":"split_canvas_y","value":"4512.4"},{"label":"split_canvas_w","value":"4926.0"},{"label":"split_canvas_h","value":"3139.6"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"607.2,1910.8 1533.6,1877.8 1531.3,1510.3 1583.5,1372.9 1560.0,1213.1 1450.8,1152.8 1286.4,1144.3 931.3,1192.7 613.6,1186.1 469.1,1237.7 426.5,1442.6 438.1,1870.4 607.2,1910.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1281.1,1810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.18113542946703,42.38027662259043]}},{"type":"Feature","properties":{"resourceCoords":[481.4,1422.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.18515837435537,42.381850659174965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.8,1881.6 218.5,1839.9 673.0,1879.3 1073.3,1801.7 1237.8,1885.3 1555.7,1873.0 1585.5,272.2 1410.5,300.3 1353.0,194.2 1262.6,1.0 1246.1,1.0 1215.4,9.7 1006.7,92.7 809.5,152.8 678.1,185.4 514.5,216.7 229.2,260.2 107.0,283.9 60.5,306.0 14.9,355.1 191.2,526.2 171.9,680.7 80.2,1159.9 1.0,1657.4 1.0,1789.8 81.0,1784.8 198.8,1881.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1330.0,1186.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.18263881153743,42.38574913285978]}},{"type":"Feature","properties":{"resourceCoords":[1282.0,9.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1836588038967,42.387794833004996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p6","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1499.8,179.8 1383.9,722.6 1379.1,722.1 1392.5,795.8 1396.6,859.3 1393.3,944.9 1387.6,1161.5 1391.2,1280.8 1402.2,1318.4 1441.1,1383.7 1517.2,1841.4 1473.1,1824.9 1420.4,1876.0 1419.0,1858.5 1287.2,1880.8 796.2,1825.9 486.6,1852.1 83.3,1823.2 64.9,1431.3 32.8,1315.2 56.8,1116.5 38.8,947.2 76.2,732.5 48.2,445.3 90.4,66.8 469.4,71.8 937.5,32.1 1448.1,55.7 1521.2,86.6 1542.5,118.2 1547.4,176.4 1499.8,179.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[714.0,1581.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.173419,42.3789726]}},{"type":"Feature","properties":{"resourceCoords":[1193.0,1170.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1708912,42.3803187]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.9,1668.0 63.7,1855.5 430.1,1893.9 1571.2,1887.7 1570.4,1875.0 1532.1,1872.8 1532.9,1813.6 1577.3,1279.4 1567.6,1278.9 1591.4,1080.7 1573.3,1079.7 1593.6,887.7 1578.5,888.9 1610.6,347.0 1540.5,62.7 314.2,15.2 303.7,1.0 255.5,1.0 104.1,527.6 99.4,526.8 107.5,600.5 107.2,663.4 98.1,747.6 77.6,960.9 73.0,1078.8 81.2,1116.7 115.1,1183.7 158.8,1640.5 116.4,1621.2 60.9,1668.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1408.0,738.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1632727510853,42.38103787325079]}},{"type":"Feature","properties":{"resourceCoords":[1536.0,1216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.16266960034973,42.379268272172624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.7,112.1 78.0,125.9 83.7,201.9 58.8,206.8 60.9,221.9 42.5,1693.2 1.0,1744.5 1.0,1806.2 156.5,1757.3 524.7,1650.0 622.9,1623.9 626.9,1709.9 612.5,1763.7 936.8,1806.8 947.1,1756.8 1209.2,1815.3 1171.7,1369.6 1319.4,898.0 1328.8,897.5 1306.1,543.1 1175.4,564.0 1086.4,371.2 1060.7,70.3 194.7,112.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[998.0,1542.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.15887973622561,42.37815381243453]}},{"type":"Feature","properties":{"resourceCoords":[1314.0,552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.16122606782504,42.37900214386718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.2,1746.1 1513.3,1337.1 1612.0,1312.0 1612.0,1225.6 1559.8,1213.2 1575.2,966.7 1501.6,792.6 1359.0,785.8 1150.4,789.0 1150.4,789.0 1137.7,775.1 1119.8,214.9 1000.3,42.8 865.9,15.9 837.6,1.0 832.1,1.0 768.4,18.9 343.1,139.0 72.2,495.9 72.9,560.5 71.7,876.4 122.7,875.8 149.9,1201.7 94.3,1199.2 11.2,1221.5 57.6,1311.8 241.3,1648.4 322.8,1790.7 263.4,1803.7 423.6,1884.0 1517.0,1840.2 1520.3,1802.4 1516.2,1746.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1504.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1553952057922,42.37628112827282]}},{"type":"Feature","properties":{"resourceCoords":[426.0,867.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.15752250416375,42.37778549699549]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belmont, Massachusetts | 1915 | sanborn03690_003 p9 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.80"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4550.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1901.6"},{"label":"split_canvas_h","value":"3156.0"}],"created":"2026-10-18T22:11:25Z","modified":"2026-10-18T22:11:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1150.3,652.9 1210.6,771.2 1514.2,766.8 1579.5,708.0 1556.5,127.3 1271.4,42.9 1266.6,129.4 1166.6,149.0 1146.7,558.2 1147.6,615.2 1150.3,652.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036901915:03690_1915-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1452.2,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1546539,42.3762021]}},{"type":"Feature","properties":{"resourceCoords":[1166.6,149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.155384,42.376254]}}]}}]}