{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03795_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Milton, Massachusetts | 1917 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"23"},{"label":"placed","value":"15"},{"label":"unplaced","value":"8"},{"label":"fit sources","value":"georef-snap 10, georef 4, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 14 panels"},{"label":"unplaced pages","value":"p10 (tier 2, 42.25751,-71.05452 +/-1020m); p13__2 (tier 2, 42.25767,-71.03944 +/-100m); p14__1 (tier 3, 42.24812,-71.07771 +/-2217m); p14__2 (tier 1, 42.25080,-71.05272 +/-165m); p15 (tier 3, 42.23311,-71.11434 +/-100m); p16__3 (tier 1, 42.25807,-71.06957 +/-199m); p5__2 (tier 1, 42.25860,-71.08804 +/-100m); p9 (tier 1, 42.26453,-71.06805 +/-511m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p11","metadata":[{"label":"streets","value":"19"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1609.3,1750.3 1524.5,1889.8 1274.7,1862.8 796.1,1879.8 471.8,1827.4 342.4,1850.8 87.3,1817.4 93.3,1713.6 57.0,1639.9 31.2,1407.1 17.1,1003.6 16.1,335.7 68.0,166.7 40.9,72.6 79.1,24.3 809.7,47.5 1097.4,17.9 1461.8,72.1 1495.8,87.5 1477.4,128.3 1502.5,172.4 1532.1,161.2 1527.9,224.8 1584.5,250.4 1316.4,322.1 1323.6,328.8 1294.7,516.1 1298.5,515.6 1255.4,767.3 1224.8,770.4 1225.0,794.0 1451.2,1175.7 1496.9,1174.8 1496.1,1151.4 1526.7,1161.3 1578.5,1720.6 1609.9,1749.5 1609.3,1750.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[804.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.045971,42.2589083]}},{"type":"Feature","properties":{"resourceCoords":[491.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0473643,42.2584421]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p12","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"862.6,53.8 1469.1,30.5 1528.3,283.5 1432.0,576.7 1584.0,652.0 1549.8,688.2 1453.8,1309.6 1424.0,1286.0 1308.2,1442.0 959.2,1912.0 925.8,1912.0 871.4,1912.0 869.3,1830.7 703.2,1855.3 700.4,1820.3 640.7,1800.3 641.9,1846.2 552.5,1846.8 118.5,1095.3 118.8,1049.2 178.7,1043.8 268.5,552.6 261.0,553.4 321.8,187.8 307.8,174.6 833.6,40.3 862.6,53.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[850.0,800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0413698,42.258338]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,1286.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0395574,42.2579717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p13 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.2,1484.3 174.9,1514.7 145.9,1485.6 93.4,1552.2 492.6,1912.0 534.7,1912.0 530.8,1892.7 598.4,1897.4 829.4,1820.8 807.5,1672.7 874.0,1592.4 894.9,1358.9 894.8,1352.6 895.4,1352.6 895.4,1352.2 1367.7,1300.5 1326.0,1174.5 1463.6,1132.7 1495.2,1075.7 1576.5,512.6 1565.2,267.7 1492.0,152.2 1422.0,175.4 1299.6,122.7 1197.0,129.6 1131.8,61.8 936.0,21.9 747.0,37.9 344.6,171.3 294.5,114.2 201.1,218.9 110.1,260.8 78.2,527.7 31.4,632.6 62.6,785.4 1.0,804.2 1.0,831.1 180.1,1091.3 161.0,1093.0 172.5,1190.5 207.2,1484.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[794.0,754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.03606,42.25842]}},{"type":"Feature","properties":{"resourceCoords":[161.0,1093.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0395574,42.2579717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p16 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.59"},{"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":"4684.4"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.7,861.8 39.8,1071.0 127.4,1113.3 479.2,1052.0 484.2,1050.7 485.3,1050.7 486.4,1050.7 517.7,1045.2 566.0,1006.5 917.8,989.2 1230.2,1029.8 1355.5,856.7 1458.6,856.7 1519.9,662.1 1574.4,185.2 1559.5,117.7 1515.3,83.8 1258.0,78.2 1075.4,29.5 884.6,56.7 754.7,31.9 416.3,131.1 91.7,67.2 52.2,264.1 67.7,430.4 40.1,654.1 1.0,651.5 1.0,690.3 10.8,711.1 25.4,860.8 32.7,861.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__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":[-71.07476630299283,42.25848821565043]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06678349994425,42.259123021851245]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1171.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06616520901511,42.25480336990554]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1171.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07414801206369,42.254168563704724]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p16 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4347.6"},{"label":"split_canvas_y","value":"3590.0"},{"label":"split_canvas_w","value":"2104.4"},{"label":"split_canvas_h","value":"4062.0"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1150.8,1319.6 1086.9,1419.8 1086.9,1709.4 1086.9,1912.0 1467.5,1912.0 1498.1,1870.6 1612.0,1780.0 1612.0,1738.9 1606.2,1741.7 1503.4,1361.1 1576.3,1081.1 1548.9,1042.5 1373.3,1026.5 1358.9,991.3 1356.1,995.7 1257.6,1045.0 1248.0,1165.2 1228.3,1196.1 1211.4,1203.7 1178.5,1237.5 1197.9,1231.9 1150.8,1319.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1253.6,1210.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07963398105454,42.262391089769636]}},{"type":"Feature","properties":{"resourceCoords":[1253.6,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08082283344159,42.260255407671444]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p16 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.58"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1941.2"},{"label":"split_canvas_y","value":"4150.8"},{"label":"split_canvas_w","value":"2968.8"},{"label":"split_canvas_h","value":"3501.2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1073.3,1795.8 1078.5,1481.1 1039.7,1326.9 1070.0,1063.6 887.0,1044.8 638.1,1082.2 547.5,1207.4 508.3,1325.4 509.4,1589.5 543.8,1749.6 527.2,1880.1 1046.8,1891.1 1073.3,1795.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0016__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[485.3,1037.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07079691246199,42.25158159202161]}},{"type":"Feature","properties":{"resourceCoords":[1227.5,1037.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0685744448373,42.24940069983428]}},{"type":"Feature","properties":{"resourceCoords":[1227.5,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07202842267581,42.247444782502974]}},{"type":"Feature","properties":{"resourceCoords":[485.3,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0742508903005,42.2496256746903]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"15.6,1820.2 114.1,1862.7 363.0,1897.4 1561.0,1829.0 1589.6,1533.5 1547.0,1100.8 1604.1,779.6 1586.3,263.4 1552.8,127.5 1603.1,50.8 1463.1,1.0 1392.1,1.0 1376.4,29.4 630.8,15.7 366.5,70.2 88.0,77.5 14.0,213.4 39.1,247.6 1.0,388.9 1.0,1827.3 15.6,1820.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[852.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08227090706116,42.2549356931731]}},{"type":"Feature","properties":{"resourceCoords":[196.0,859.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08124341071617,42.25821584397296]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p3 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2895.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4756.8"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4.0,1260.7 111.0,1442.0 129.7,1457.3 246.4,1682.0 316.1,1674.2 271.5,1767.8 546.2,1855.0 660.1,1841.6 704.1,1841.3 766.0,1846.5 784.2,1608.9 824.0,1597.3 826.5,1565.0 859.4,1574.5 886.5,1574.3 1308.0,1533.3 1303.8,1497.5 1548.2,1277.4 1612.0,1277.5 1612.0,780.7 1581.7,728.0 1559.7,730.9 1574.9,765.5 1541.8,772.0 1528.8,735.0 1520.4,776.2 1169.0,845.2 1170.0,850.7 1088.5,864.6 1058.0,867.5 812.5,869.6 817.0,831.8 796.5,836.8 760.7,865.0 730.6,880.2 731.6,886.8 358.9,993.9 159.6,1000.4 73.9,1059.9 4.0,1260.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1170.0,850.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09208,42.265252]}},{"type":"Feature","properties":{"resourceCoords":[1308.0,1533.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0911329,42.2627886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p3 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.45"},{"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":"4122.0"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.5,920.9 211.0,850.9 249.2,833.0 255.4,909.1 738.2,806.5 797.4,788.6 952.3,728.7 948.2,718.2 1612.0,442.7 1612.0,252.6 1450.0,24.2 1430.8,1.0 1402.8,1.0 1410.0,59.4 159.6,51.9 95.7,197.7 86.8,244.9 114.8,471.2 58.3,855.1 98.3,962.8 151.5,920.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0941926804677,42.26679807080689]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09023949929346,42.266432731468825]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1030.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09055252708356,42.26455139716027]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1030.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09450570825781,42.26491673649834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.7,1885.8 58.0,1833.0 79.7,1358.5 34.9,993.5 93.0,795.2 111.8,201.2 185.3,127.2 173.2,90.7 306.1,24.9 754.2,135.0 1148.4,84.8 1319.3,28.5 1430.7,40.7 1551.5,104.9 1554.9,103.7 1483.2,301.9 1483.3,326.2 1384.3,559.7 1434.8,609.0 1334.2,633.6 1442.1,902.7 1525.1,982.7 1553.5,1016.7 1588.9,1068.1 1413.4,1190.4 1437.2,1220.3 1377.0,1262.2 1231.8,1364.2 1025.0,1508.8 817.9,1652.0 842.4,1672.1 648.5,1849.8 613.3,1821.0 548.2,1874.3 547.7,1883.4 130.7,1885.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10251202747516,42.25894347729887]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09795050557614,42.263809091104555]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0902082245688,42.259776913302105]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09476974646782,42.25491129949642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0005__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p5 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0005__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1510.7 1.0,1536.9 29.7,1531.1 44.3,1793.8 1.0,1802.6 1.0,1887.9 6.7,1893.2 46.7,1843.3 433.4,1883.7 508.5,1863.7 816.0,1883.3 887.6,1859.3 1162.2,1876.5 1223.2,1848.0 1479.1,1867.4 1479.5,1911.5 1513.0,1908.3 1612.0,1858.3 1612.0,557.5 1398.9,557.5 1077.0,557.5 1077.0,122.0 1077.0,1.0 814.5,1.0 572.0,220.6 576.2,256.3 155.2,298.3 128.1,298.4 95.3,289.0 92.8,321.4 53.1,333.1 35.3,570.6 18.9,784.0 56.8,784.5 51.1,857.7 38.2,1034.7 19.1,1286.3 1.0,1510.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0005__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[883.0,1053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08931310166538,42.259951450219326]}},{"type":"Feature","properties":{"resourceCoords":[779.0,1648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08960490564384,42.25773989080969]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p6 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3742.8"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3909.2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"492.9,1912.0 1596.0,1912.0 1596.0,1894.0 1612.0,1893.0 1612.0,1099.2 1579.9,1099.6 1563.8,1095.6 1157.5,1014.5 1163.2,953.6 1104.6,935.7 1067.7,940.6 1062.7,941.2 1056.7,942.0 1048.5,954.0 531.4,1010.1 531.1,1036.3 441.1,1071.6 202.3,1080.2 68.8,1147.3 32.5,1451.9 99.8,1862.1 213.3,1895.5 198.0,1911.4 453.8,1910.0 492.9,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[845.0,1818.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0892676646697,42.265550455740716]}},{"type":"Feature","properties":{"resourceCoords":[1532.0,1523.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0861015747971,42.26405818628708]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p6 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"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":"4302.8"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"766.5,247.9 732.9,280.5 374.0,302.4 261.1,225.6 268.6,218.9 165.0,139.0 25.6,461.6 30.3,471.4 19.1,494.7 61.5,548.2 97.8,761.9 56.8,956.1 94.8,1040.0 1099.3,933.5 1543.5,1038.0 1581.2,941.6 1599.0,376.1 1577.8,169.4 1527.0,81.3 1410.0,83.7 1100.6,29.3 1084.1,1.0 1081.9,1.0 1049.8,21.1 1027.7,10.3 1010.5,36.8 980.7,67.3 801.7,218.3 747.4,230.5 766.5,247.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0006__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[676.0,932.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07020711254549,42.266560807117656]}},{"type":"Feature","properties":{"resourceCoords":[122.0,1009.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07159483696643,42.26481612009719]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"566.6,1908.8 159.2,1821.5 165.9,1760.3 107.2,1741.5 58.9,1747.2 96.7,1693.3 99.6,1485.8 65.3,1394.9 86.7,1351.8 45.7,1327.6 12.1,1210.3 53.8,102.6 125.3,32.4 381.9,13.7 498.4,80.4 500.7,70.5 675.5,119.0 958.0,164.3 962.2,175.5 1212.7,61.8 1217.2,47.7 1541.6,86.6 1549.5,79.4 1574.5,83.4 1541.7,130.2 1569.2,1259.9 1612.0,1289.9 1612.0,1295.3 1553.9,1392.3 1612.0,1501.7 1612.0,1539.3 1601.5,1555.2 1591.8,1602.7 1605.4,1587.2 1612.0,1675.8 1612.0,1892.0 1597.0,1893.0 1597.0,1912.0 578.9,1912.0 566.6,1908.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[255.0,1412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08309917543427,42.26685303987608]}},{"type":"Feature","properties":{"resourceCoords":[995.0,212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07607054360174,42.267162382948904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1917 | sanborn03795_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:15:30Z","modified":"2026-10-19T15:15:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"410.8,23.6 339.0,1.0 335.4,1.0 323.7,25.6 35.7,65.5 46.2,1744.7 1.0,1763.5 1.0,1764.2 261.6,1820.0 259.9,1799.7 622.5,1785.9 1188.7,1700.5 1203.5,1719.2 1612.0,1350.0 1612.0,1320.5 1577.6,1327.2 1592.8,1071.1 1612.0,1076.0 1612.0,858.5 1612.0,808.2 1180.7,251.1 1090.9,232.5 1083.8,282.6 1084.5,292.5 1004.1,208.2 892.9,177.1 562.0,84.7 479.6,70.1 417.9,71.4 410.8,23.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951917:03795_1917-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[430.0,207.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07298969415994,42.26953639941684]}},{"type":"Feature","properties":{"resourceCoords":[792.0,866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07428974308392,42.26853498988696]}}]}}]}