{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03728_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Fitchburg, Massachusetts | 1887 | 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":"35"},{"label":"placed","value":"14"},{"label":"unplaced","value":"21"},{"label":"fit sources","value":"georef-snap 7, georef 6, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 28 panels"},{"label":"unplaced pages","value":"p12__2 (tier 1, 42.58269,-71.80756 +/-100m); p12__3 (tier 1, 42.58267,-71.79081 +/-132m); p14__2 (tier 1, 42.57842,-71.79219 +/-100m); p15__2 (tier 1, 42.58170,-71.79421 +/-100m); p16__1 (tier 1, 42.58318,-71.80812 +/-100m); p16__2 (tier 1, 42.58286,-71.80847 +/-100m); p16__3 (tier 1, 42.58512,-71.80738 +/-100m); p16__4 (tier 1, 42.58351,-71.80757 +/-100m); p17__2 (tier 1, 42.58579,-71.78794 +/-102m); p17__3 (tier 1, 42.58557,-71.79151 +/-100m); p2__1 (tier 4, 42.58315,-71.79743 +/-1071m); p2__2 (tier 1, 42.58612,-71.81076 +/-128m); p2__3 (tier 4, 42.58315,-71.79743 +/-1071m); p2__4 (tier 4, 42.58315,-71.79743 +/-1071m); p2__5 (tier 4, 42.58315,-71.79743 +/-1071m); p2__6 (tier 4, 42.58315,-71.79743 +/-1071m); p3__1 (tier 1, 42.57740,-71.79498 +/-116m); p3__2 (tier 1, 42.57664,-71.79428 +/-219m); p3__3 (tier 1, 42.57597,-71.79566 +/-162m); p3__4 (tier 1, 42.57679,-71.79518 +/-101m); p8__1 (tier 1, 42.58365,-71.79947 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1138.2,61.4 699.5,413.5 580.2,497.9 523.1,499.4 496.0,305.4 495.6,302.9 182.9,757.1 187.3,789.7 178.7,920.9 162.5,1080.9 132.2,1506.2 140.7,1545.5 170.6,1775.3 191.1,1832.8 445.3,1803.8 817.9,1757.2 1221.0,1703.3 1612.0,1412.3 1612.0,1384.8 1571.8,1315.0 1556.8,139.8 1390.3,65.5 1362.0,1.0 1215.8,1.0 1138.2,61.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1141.0,1359.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79586782293568,42.5838894206319]}},{"type":"Feature","properties":{"resourceCoords":[189.0,789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79818492094978,42.58277167387467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p11","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"155.8,1873.7 43.3,1873.6 57.0,1813.6 109.1,1566.0 181.7,1201.7 256.9,806.4 101.5,335.5 118.5,128.2 524.8,155.6 706.9,36.5 932.8,38.3 1173.9,132.5 1178.5,111.6 1545.0,204.4 1540.5,324.6 1539.6,344.9 1427.4,339.7 1375.6,364.0 1374.6,390.9 1404.0,601.7 1467.3,1003.2 1576.2,1724.1 1499.3,1731.6 1033.3,1765.5 987.6,1766.7 926.4,1785.2 673.3,1813.4 562.2,1819.5 434.0,1835.2 155.8,1873.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[255.0,816.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7950151,42.5837285]}},{"type":"Feature","properties":{"resourceCoords":[1140.0,327.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7926403,42.5844158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p12 [1]","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":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4074.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"610.8,1833.8 967.8,1852.0 981.5,224.6 1017.5,197.6 1017.5,196.9 1017.5,176.0 688.6,104.8 686.4,129.4 251.6,134.4 250.3,147.6 236.2,293.9 234.1,313.9 123.7,302.2 71.2,323.2 68.6,349.7 85.2,559.5 124.2,959.5 189.6,1677.4 507.6,1663.7 610.8,1833.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[258.9,308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79158209379919,42.58429416911796]}},{"type":"Feature","properties":{"resourceCoords":[760.6,1663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79054958045813,42.58168734118182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p13","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.03"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"31.8,1861.3 56.6,1897.3 109.6,1835.1 789.1,1880.5 1362.7,1812.0 1364.2,1873.0 1544.8,1743.7 1502.8,1390.3 1493.1,1305.6 1447.1,791.5 1445.0,741.0 1423.4,673.7 1387.7,394.8 1378.9,272.1 1359.2,130.8 1188.0,95.8 1177.7,48.1 664.8,1.0 276.3,1.0 282.4,42.3 86.7,144.2 37.5,524.4 1.0,528.7 1.0,607.1 54.5,682.0 86.8,1822.1 31.8,1861.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1445.0,741.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7934936,42.5818002]}},{"type":"Feature","properties":{"resourceCoords":[1343.0,-293.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7958646,42.5818848]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p14 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0014__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.2,1851.4 360.9,1865.8 444.5,1862.4 443.3,1803.5 643.1,1802.8 818.0,1807.8 989.8,1807.5 1154.7,1813.8 1149.0,1842.1 1508.3,1902.5 1589.5,1744.0 1564.0,701.6 1500.2,636.5 1200.1,636.8 1199.3,633.7 1198.7,633.7 1160.0,633.7 1160.0,633.0 1160.0,631.5 1160.0,572.4 310.0,1.0 145.1,1.0 65.8,145.1 31.6,1019.1 42.7,1551.5 138.7,1633.2 60.2,1738.8 60.8,1835.2 112.2,1851.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,1305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7914447694515,42.577757067927905]}},{"type":"Feature","properties":{"resourceCoords":[1158.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79007936353982,42.57721728033665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p15 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.95"},{"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":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1503.8,153.6 1143.7,94.7 1149.2,66.4 984.1,60.9 812.0,62.0 636.9,57.8 436.8,59.3 438.3,118.3 354.6,122.2 105.4,108.9 53.9,93.0 64.0,1030.4 147.8,1072.8 108.5,1182.5 162.8,1315.2 91.1,1440.9 57.0,1796.1 366.9,1872.0 735.4,1831.8 781.0,1757.7 865.0,1767.8 936.7,1626.0 967.4,1309.5 1054.8,1264.7 1125.7,1316.8 1526.3,1325.2 1569.2,1128.3 1575.0,605.0 1463.0,394.4 1457.2,245.7 1503.8,153.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.0,565.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.790271,42.576088]}},{"type":"Feature","properties":{"resourceCoords":[812.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.790847,42.576926]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p17 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"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":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"182.4,1362.6 213.6,1395.8 369.3,1424.5 821.3,1427.3 821.8,1431.5 822.9,1431.5 822.9,1440.5 862.7,1768.3 966.6,1866.3 1571.5,1805.1 1567.5,1082.1 1486.5,953.7 1337.1,959.7 1158.0,872.0 1142.5,872.0 1142.5,864.4 1124.5,855.6 1054.2,123.3 901.1,187.3 689.9,168.8 572.5,75.8 233.2,23.6 227.5,1.0 226.9,1.0 152.4,225.3 172.9,228.7 101.3,588.6 128.9,588.2 141.9,588.0 194.1,1011.9 218.3,1011.5 182.4,1362.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[864.0,1009.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.790153,42.585834]}},{"type":"Feature","properties":{"resourceCoords":[366.0,1009.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7903874,42.5848965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.8,1558.2 41.0,683.5 180.6,283.9 148.2,180.6 441.0,28.1 1221.7,55.6 1462.6,123.8 1508.8,222.9 1582.1,1373.0 1500.4,1860.4 1454.3,1882.4 1463.6,1912.0 1265.8,1912.0 1255.7,1882.0 1252.2,1880.5 576.7,1814.6 576.5,1849.2 133.6,1635.1 171.8,1558.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[899.0,1113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80846314260579,42.58782814733524]}},{"type":"Feature","properties":{"resourceCoords":[1245.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80914678663264,42.58866344462132]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1261.5,1841.3 1317.9,1664.0 1325.2,1539.4 1341.2,1380.2 1370.2,1164.9 1364.5,1126.2 1326.0,1027.9 1520.0,573.2 1612.0,369.1 1612.0,83.7 1573.5,120.1 1327.8,50.4 1017.5,153.6 545.3,36.5 62.0,75.2 42.0,209.6 1.0,245.1 1.0,424.7 24.8,479.4 1.0,490.9 1.0,508.6 213.2,1164.4 245.7,1150.5 225.6,1652.0 393.2,1660.5 672.4,1847.5 957.5,1805.1 1261.5,1841.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1307.0,1030.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80473590529054,42.585735346733976]}},{"type":"Feature","properties":{"resourceCoords":[700.0,790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80548529189707,42.58679537754001]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p6","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.62"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"756.1,203.6 616.2,374.7 315.2,758.6 326.9,862.1 322.4,900.5 239.8,1098.2 183.9,1246.0 145.2,1363.0 46.1,1517.5 66.7,1525.8 80.6,1737.3 238.8,1846.3 706.7,1877.5 1546.5,1808.7 1546.9,1811.8 1551.8,1811.4 1506.4,1307.8 1471.7,1311.9 1466.2,1127.0 1465.1,931.5 1459.3,680.1 1462.5,570.6 1458.8,327.9 1461.0,59.0 1012.6,83.9 942.2,73.5 902.8,54.3 870.6,87.1 859.8,1.0 810.4,1.0 756.1,203.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[741.0,1099.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.8041073,42.5848021]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,59.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.8013297,42.5859529]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p7 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3449.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4202.4"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"37.2,1840.1 152.4,1841.3 262.4,1833.7 387.6,1817.7 1264.6,1716.5 1420.5,1698.6 1612.0,1676.8 1612.0,1620.6 1532.0,1501.2 1196.7,1061.1 1138.2,982.0 1141.0,871.6 1025.3,879.5 551.1,931.6 289.7,962.2 56.4,974.2 47.1,1241.0 44.3,1481.9 38.2,1590.5 37.2,1840.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,1258.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79977060905807,42.5848492487646]}},{"type":"Feature","properties":{"resourceCoords":[57.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80224354417606,42.584466837788504]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p7 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"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":"3501.6"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"823.3,840.7 1088.0,835.8 1567.8,830.2 1541.3,217.8 1356.5,35.2 1336.0,65.2 1384.4,94.8 1125.2,144.6 461.1,86.6 364.3,27.4 91.2,59.0 85.2,582.9 1.0,615.7 1.0,783.3 36.0,755.6 72.7,779.5 141.1,798.6 588.6,829.7 823.3,840.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0007__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[395.0,310.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.80137018240701,42.58698192385477]}},{"type":"Feature","properties":{"resourceCoords":[1536.0,310.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.79864499746377,42.58629943158686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0008__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p8 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.80"},{"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":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0008__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"582.6,1672.1 598.5,1698.0 582.3,1698.5 593.6,1713.3 597.8,1718.8 598.6,1719.9 839.8,1813.3 839.8,1802.9 1202.9,1812.7 1203.0,1842.5 1203.0,1848.6 1566.9,1445.8 1565.7,1291.1 1558.1,407.6 1555.5,281.2 1559.6,171.0 1573.0,56.4 1380.3,31.7 1197.4,12.7 1196.8,47.5 694.8,25.7 695.1,20.8 158.9,24.2 92.5,76.6 39.0,490.1 76.2,1269.5 167.3,1361.2 320.5,1363.8 327.5,1368.5 330.7,1368.5 334.1,1372.9 457.4,1455.5 582.6,1672.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0008__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1202.0,935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.8004629,42.5833213]}},{"type":"Feature","properties":{"resourceCoords":[1202.0,1199.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.7998275,42.5831665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fitchburg, Massachusetts | 1887 | sanborn03728_001 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.25"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:04:22Z","modified":"2026-10-19T18:04:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,772.1 1.0,774.0 28.9,808.3 88.6,1865.3 1528.8,1875.4 1587.1,1777.0 1580.0,1213.5 1612.0,1202.1 1612.0,751.2 1571.0,361.4 1612.0,343.5 1612.0,184.8 1346.2,282.3 1234.9,306.6 1235.7,244.7 1176.3,259.0 944.5,264.8 904.4,269.1 484.7,195.1 327.4,162.4 197.8,140.4 158.7,141.4 128.4,142.3 126.8,509.3 137.4,509.1 48.1,755.3 26.9,772.3 26.0,755.9 1.0,772.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764fm:g037281887:03728_1887-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.79853105286783,42.583136047259366]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.79474601392549,42.58212834355336]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.79635773590832,42.57879964640709]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.80014277485066,42.5798073501131]}}]}}]}