{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03857_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Spencer, Massachusetts | 1912 | 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":"32"},{"label":"placed","value":"18"},{"label":"unplaced","value":"14"},{"label":"fit sources","value":"georef-snap 11, georef 6, georef:misscale 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"12 sheet(s) cut into 27 panels"},{"label":"unplaced pages","value":"p10__2 (tier 1, 42.24261,-72.00002 +/-145m); p11__2 (tier 1, 42.24405,-71.98700 +/-132m); p13__1 (tier 1, 42.24007,-71.99929 +/-173m); p16__2 (tier 1, 42.24960,-71.98113 +/-115m); p18__1 (tier 1, 42.24210,-72.00048 +/-104m); p18__2 (tier 1, 42.24237,-72.00064 +/-108m); p3__2 (tier 1, 42.24322,-71.99645 +/-100m); p4__2 (tier 1, 42.24796,-71.99705 +/-100m); p5__1 (tier 1, 42.25135,-71.99460 +/-147m); p5__2 (tier 1, 42.24928,-71.99638 +/-262m); p5__3 (tier 1, 42.24938,-71.99175 +/-100m); p5__4 (tier 2, 42.24826,-71.99666 +/-100m); p7__2 (tier 1, 42.24787,-71.99182 +/-112m); p9__1 (tier 1, 42.24553,-71.98725 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p10 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.93"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.0,1511.8 152.6,1520.2 454.7,1539.0 521.2,1538.4 527.5,1559.2 715.0,1559.3 764.7,1912.0 765.5,1912.0 1020.9,1880.7 1248.2,1843.2 1295.8,1795.5 1557.4,1804.2 1556.9,1788.0 1550.8,1549.0 1513.5,1057.3 1327.7,972.6 838.7,978.5 831.1,793.5 639.2,524.7 636.0,520.4 636.1,520.4 746.7,463.6 748.2,126.6 582.6,61.4 265.8,119.3 220.0,212.1 153.9,212.4 142.2,486.7 37.2,616.1 78.1,850.5 310.4,1030.9 215.6,1223.0 76.8,1220.5 117.7,1438.3 60.0,1511.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[86.0,1514.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.986843,42.248505]}},{"type":"Feature","properties":{"resourceCoords":[1286.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.983578,42.247254]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p11 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"17.2,1464.8 46.8,1480.0 125.8,1626.5 851.4,1781.0 894.1,1461.4 1109.4,791.5 1507.3,777.0 1475.3,492.1 1572.3,224.9 1542.2,46.7 1559.0,11.7 1077.2,39.6 843.3,41.4 726.2,42.5 510.9,49.1 85.3,52.8 96.2,431.6 96.5,465.9 67.5,944.5 42.2,1267.9 48.0,1269.7 17.2,1464.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[522.0,427.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98611843506792,42.24496080219453]}},{"type":"Feature","properties":{"resourceCoords":[82.0,55.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98753380331249,42.245201499944876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"732.1,1826.7 774.3,1763.0 1157.9,1842.5 1234.5,1874.0 1326.8,1912.0 1369.7,1912.0 1371.6,1910.0 1464.8,1782.2 1475.3,1764.5 1528.8,1674.3 1561.8,1613.0 1586.2,1540.5 1586.4,1434.2 1567.6,1362.2 1518.2,1244.1 1471.8,1172.9 1414.9,1099.0 1374.1,1046.0 1312.1,917.6 1309.0,835.5 1331.8,753.8 1372.1,627.4 1439.0,417.1 1353.0,390.1 1350.5,389.5 1227.9,360.0 1087.4,317.1 880.6,232.1 723.8,156.5 565.8,48.0 506.4,24.4 422.4,28.4 214.0,1.0 164.2,1.0 151.8,4.5 74.5,432.9 46.8,612.8 42.2,734.5 46.8,929.5 61.0,1049.8 82.5,1156.0 130.9,1321.3 188.2,1485.7 325.6,1788.5 732.1,1826.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[887.0,1534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99854167403896,42.2412125499751]}},{"type":"Feature","properties":{"resourceCoords":[516.0,16.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99553460441406,42.243046378241644]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p13 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.1,495.1 87.9,446.1 73.0,405.1 72.7,407.6 37.0,831.9 377.3,866.4 832.5,642.5 976.9,543.0 968.0,599.6 983.6,752.1 805.5,1841.5 1542.6,1868.3 1570.8,1558.9 1571.2,1262.0 1563.5,661.6 1555.5,525.5 1549.0,69.7 1494.4,69.8 1150.1,69.2 1067.5,72.0 992.2,99.0 891.1,194.4 802.1,322.5 749.5,386.4 654.5,467.1 593.0,505.8 494.2,536.8 419.8,535.5 353.1,522.8 234.1,495.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1556.0,470.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99513389489415,42.24045629986961]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,1695.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99468798807384,42.23815899036436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p14","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"113.5,81.1 203.2,81.7 331.1,73.9 477.5,73.7 699.2,94.3 870.6,120.5 1052.7,177.8 1116.2,182.9 1195.0,154.6 1435.2,114.2 1459.7,98.4 1509.5,495.1 1510.5,573.4 1510.3,609.0 1506.1,675.1 1498.5,746.5 1472.4,904.9 1450.2,1019.0 1409.0,1188.5 1402.0,1226.8 1403.5,1328.7 1407.9,1362.0 1414.2,1390.7 1422.0,1425.7 1435.8,1464.2 1466.2,1506.4 1248.3,1603.2 1035.1,1693.8 951.4,1723.8 863.6,1740.2 665.0,1739.8 499.5,1707.9 362.9,1656.8 341.1,1664.2 418.2,1722.4 60.0,1845.6 53.5,1814.7 21.3,1816.7 74.3,1563.5 110.1,1555.7 114.6,1491.4 111.2,507.9 113.0,137.0 113.5,81.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[113.0,1038.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.993068,42.241458]}},{"type":"Feature","properties":{"resourceCoords":[113.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.9952972,42.2412052]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p15","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"316.6,150.1 927.6,146.6 1066.1,139.3 1530.0,136.0 1529.1,505.1 1534.7,1483.8 1530.5,1547.8 1419.8,1525.5 1293.2,1522.1 1179.8,1532.4 904.5,1578.1 725.0,1612.6 496.6,1640.0 282.2,1654.4 205.5,638.2 84.1,581.7 128.0,291.2 118.7,157.9 316.6,150.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,1028.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.992802,42.240094]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.9952972,42.2412052]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p16 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.76"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0016__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.3,1379.6 77.8,1745.6 801.0,1834.3 940.7,1764.5 1189.0,1775.3 1319.9,1843.8 1322.1,1909.0 1422.7,1326.6 1379.6,1220.5 1371.8,1100.6 1378.8,1066.2 938.3,1067.4 954.2,778.0 971.5,535.1 997.2,111.9 894.6,132.4 828.3,154.2 744.5,181.9 643.1,215.5 592.8,232.2 560.2,242.9 535.6,251.1 240.7,343.8 229.4,347.1 208.0,354.0 228.2,583.5 244.3,806.7 245.5,892.7 233.1,978.0 170.4,1159.4 89.5,1300.7 1.0,1408.5 1.0,1431.1 77.3,1379.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0016__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[208.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.9915778,42.2428734]}},{"type":"Feature","properties":{"resourceCoords":[208.0,354.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.992422,42.244068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p17 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.8,460.0 159.3,994.2 48.6,1372.5 87.7,1617.7 550.5,1834.7 619.6,1830.8 662.5,1729.0 672.6,582.0 700.2,565.2 700.2,563.2 700.0,531.8 700.0,531.8 851.7,472.5 1117.5,309.9 1249.0,317.2 1296.0,298.9 1301.4,296.8 1375.5,73.6 1412.0,70.0 1303.9,34.7 1177.7,16.4 1063.0,13.4 782.3,26.9 598.6,40.4 366.9,41.1 150.7,30.4 125.6,29.9 126.3,159.1 58.8,460.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[494.0,1480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98778632542286,42.24064642687627]}},{"type":"Feature","properties":{"resourceCoords":[622.0,546.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99012033593182,42.240420504325975]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p17 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2800.0"},{"label":"split_canvas_y","value":"700.0"},{"label":"split_canvas_w","value":"3652.0"},{"label":"split_canvas_h","value":"6952.0"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1441.2,341.0 1439.0,351.3 1024.5,405.3 864.5,490.9 755.4,1005.9 763.3,1452.2 772.5,1595.0 845.4,1637.8 827.2,1723.7 1091.6,1779.8 1165.2,1855.2 1503.3,1844.8 1509.2,1868.5 1559.3,1563.6 1551.2,1434.5 1576.4,1433.5 1560.0,405.2 1441.2,341.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0017__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1555.1,1395.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99113566318718,42.23927604264448]}},{"type":"Feature","properties":{"resourceCoords":[750.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99210370247773,42.23760368042037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p2 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.96"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1541.9 1605.9,1542.3 1556.5,1545.8 1543.5,924.8 1551.8,927.5 1523.4,50.1 1091.2,130.2 989.6,58.7 827.1,185.7 682.0,162.8 550.9,396.0 512.0,405.7 512.0,406.2 502.4,408.1 287.4,461.8 389.8,456.2 409.4,532.2 150.2,582.3 57.1,664.4 45.5,1861.9 1493.1,1844.4 1548.3,1909.3 1612.0,1747.5 1612.0,1743.1 1612.0,1541.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1028.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.0015227,42.2415664]}},{"type":"Feature","properties":{"resourceCoords":[1534.0,476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.0017968,42.2432027]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p2 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.38"},{"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":"2048.0"},{"label":"split_canvas_h","value":"2034.8"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"268.8,454.6 287.8,450.8 292.8,449.8 379.5,200.1 260.5,218.4 259.1,218.6 268.8,454.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0002__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":[-72.00045966889567,42.24182841704074]}},{"type":"Feature","properties":{"resourceCoords":[512.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.99976530512974,42.242252415797715]}},{"type":"Feature","properties":{"resourceCoords":[512.0,508.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.99919593771996,42.24174137606039]}},{"type":"Feature","properties":{"resourceCoords":[0.0,508.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.99989030148589,42.24131737730342]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p3 [1]","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":"7652.0"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1439.1,637.3 911.2,614.0 845.2,564.8 850.4,116.8 530.5,22.4 316.9,51.6 322.2,91.0 45.1,124.1 136.9,271.5 186.7,368.6 233.1,481.6 290.4,669.6 319.1,788.9 340.9,970.9 382.2,1407.7 422.7,1810.1 421.8,1889.3 421.1,1912.0 429.1,1912.0 453.5,1873.2 492.6,1836.1 521.5,1822.5 580.5,1809.9 616.8,1807.2 689.5,1835.9 740.9,1855.3 807.0,1877.0 947.4,1888.7 1221.2,1895.8 1473.5,1896.5 1469.0,1666.6 1475.7,1265.8 1481.8,1265.8 1439.1,637.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[372.0,1433.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99583699575935,42.24365078109219]}},{"type":"Feature","properties":{"resourceCoords":[1455.0,1875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99523128572403,42.245745874785754]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"393.3,1860.8 979.5,1686.5 981.0,1692.3 1362.0,1613.3 1578.8,1560.2 1535.0,1361.6 1533.5,1355.3 1466.1,1034.5 1454.7,978.0 1469.5,753.6 1400.2,764.7 1390.2,700.7 667.3,217.5 82.7,107.5 48.7,309.4 196.3,410.2 277.6,628.5 236.3,1632.4 300.8,1794.2 388.4,1833.2 393.3,1860.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[696.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.9972866881678,42.24832353899901]}},{"type":"Feature","properties":{"resourceCoords":[963.0,1687.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99676911210754,42.245598621603044]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.20"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1004.7,128.3 1401.9,405.1 1401.0,486.0 1401.2,524.6 1502.3,524.3 1401.3,564.2 1402.5,689.9 1403.6,708.0 1413.4,767.3 1420.5,791.7 1429.2,816.1 1438.2,840.2 1612.0,1193.1 1612.0,1396.0 1449.6,1532.3 1372.3,1597.2 1150.5,1776.9 1112.8,1806.9 989.1,1842.8 895.0,1848.8 701.0,1813.7 544.9,1790.4 307.7,1770.3 308.2,1777.0 307.3,1777.1 233.3,1716.9 218.9,1691.5 198.6,1605.7 244.9,1452.5 255.3,1395.5 238.9,1048.6 208.8,621.4 187.7,259.0 232.7,52.1 640.9,47.8 714.3,123.2 922.0,144.7 1004.6,124.2 1011.8,126.9 1004.7,128.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[236.0,769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99516474737368,42.24588748868023]}},{"type":"Feature","properties":{"resourceCoords":[1641.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.99125006720213,42.2452292238431]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p7 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.96"},{"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":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"484.4,1912.0 597.5,1912.0 704.4,1870.1 948.1,1876.3 1101.6,1875.5 1102.2,1812.0 1102.3,1796.4 1069.8,1791.9 1050.2,1279.3 1109.6,987.5 1109.7,977.9 1111.5,977.9 1112.1,975.2 1549.9,962.5 1592.7,907.9 1569.8,357.9 1468.7,125.3 850.0,30.0 721.0,60.6 698.6,132.2 292.1,59.5 121.8,130.2 106.3,276.5 44.6,299.5 24.3,630.3 60.1,1477.5 52.4,1479.0 485.5,1782.5 484.2,1870.9 484.4,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[734.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.991493,42.246742]}},{"type":"Feature","properties":{"resourceCoords":[492.0,1320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.992233,42.247698]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"393.7,1.0 158.9,1.0 110.9,126.0 94.2,189.1 87.3,290.0 121.8,710.8 43.2,912.8 67.8,904.6 135.9,882.0 241.2,860.7 215.9,1295.4 198.9,1545.0 183.4,1842.3 635.9,1839.8 792.4,1844.9 1444.0,1843.0 1434.3,1464.3 1427.5,1076.8 1417.6,800.7 1396.2,757.6 1382.2,687.0 1509.5,38.8 1448.6,37.9 1345.3,236.6 1131.5,272.1 781.6,75.2 752.6,147.3 612.0,93.0 393.7,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[443.0,90.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.9913455711345,42.24663147416941]}},{"type":"Feature","properties":{"resourceCoords":[619.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98891680240365,42.24388379658407]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p9 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1849.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4602.8"},{"label":"split_canvas_h","value":"3370.4"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1549.0,53.5 1354.5,29.4 1352.9,35.2 1031.2,20.9 555.4,7.9 521.5,9.4 547.0,656.0 547.6,794.7 583.0,817.2 705.0,804.5 811.4,756.2 1409.2,835.4 1589.6,822.2 1565.1,421.6 1416.0,350.9 1489.8,195.3 1553.6,177.9 1514.0,127.4 1549.0,53.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.3,31.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98710044894356,42.24454648277177]}},{"type":"Feature","properties":{"resourceCoords":[1363.1,31.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98620131596473,42.24314211819939]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Spencer, Massachusetts | 1912 | sanborn03857_006 p9 [3]","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":"2061.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5590.4"}],"created":"2026-10-19T23:38:56Z","modified":"2026-10-19T23:38:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.0,1834.1 1579.5,1403.8 1572.6,1186.1 1571.5,1083.8 1312.7,1071.0 1264.8,1117.4 1039.2,1150.8 785.3,1177.8 741.8,828.1 556.2,825.0 550.2,804.2 484.4,803.8 185.7,780.3 94.2,770.5 63.0,809.0 150.0,1231.7 39.1,1511.6 142.7,1614.1 141.1,1764.9 797.0,1890.4 797.6,1890.5 869.0,1876.0 912.5,1854.2 1191.9,1843.0 1584.0,1834.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764sm:g038571912:03857_1912-0009__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[369.0,1664.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98853515270194,42.247345270594444]}},{"type":"Feature","properties":{"resourceCoords":[1566.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.98758922227445,42.24522247109626]}}]}}]}