{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03693_025.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boston, Massachusetts | 1919 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"127"},{"label":"placed","value":"116"},{"label":"unplaced","value":"11"},{"label":"fit sources","value":"georef-snap 75, georef 38, snap:0 2, snap:2 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"11 sheet(s) cut into 22 panels"},{"label":"unplaced pages","value":"p15__2 (tier 1, 42.32792,-71.08014 +/-139m); p24 (tier 1, 42.33097,-71.09314 +/-252m); p3 (tier 2, 42.33245,-71.09069 +/-150m); p37__2 (tier 1, 42.32569,-71.08771 +/-100m); p5 (tier 2, 42.33145,-71.08724 +/-212m); p58__2 (tier 1, 42.31977,-71.08515 +/-100m); p71__2 (tier 1, 42.32399,-71.08971 +/-100m); p84__2 (tier 1, 42.33453,-71.10904 +/-102m); p86__1 (tier 1, 42.32938,-71.11048 +/-116m); p99__1 (tier 1, 42.32486,-71.11112 +/-515m); p99__2 (tier 1, 42.32552,-71.10857 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p1","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0001","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"243.8,728.0 261.9,732.6 278.9,242.9 424.4,239.0 815.1,233.3 1031.4,233.4 1246.9,228.8 1256.2,1238.8 1295.5,1241.0 1205.3,1840.7 1182.9,1829.9 1178.8,1809.8 903.3,1775.8 303.2,1502.2 194.2,1312.5 243.8,728.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[252.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0946433,42.332606]}},{"type":"Feature","properties":{"resourceCoords":[1007.0,234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.095301,42.334385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p10","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0010","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"426.1,1412.2 425.5,1388.4 397.9,1223.1 297.5,935.3 126.1,452.9 107.0,370.0 332.2,242.8 524.1,107.8 721.0,105.0 1304.0,112.9 1310.2,149.0 1341.7,1439.4 1271.7,1600.3 1258.5,1557.5 964.8,1852.1 867.9,1761.6 814.2,1688.2 702.0,1734.7 609.9,1743.5 434.2,1749.4 426.1,1412.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[721.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.078321,42.330371]}},{"type":"Feature","properties":{"resourceCoords":[107.0,370.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079016,42.32929]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0100","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.5,358.0 1.0,412.7 1.0,1396.5 148.1,1523.3 155.5,1557.8 298.6,1583.3 554.9,1671.5 682.5,1722.1 828.8,1795.7 978.0,1894.5 1099.3,1949.0 1171.5,1957.6 1188.6,1957.6 1270.6,1942.6 1228.2,1937.0 1227.9,1681.2 1402.5,1237.2 1295.2,810.5 1421.7,343.0 1319.7,186.3 595.8,220.2 91.8,325.8 92.7,345.6 92.5,358.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[730.0,1744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10868185971711,42.324221721291416]}},{"type":"Feature","properties":{"resourceCoords":[473.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11235714971258,42.32467430696116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p101","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0101","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.5,2044.8 1298.5,1943.3 1316.2,1807.3 1330.0,1044.0 1332.7,875.9 1330.2,45.6 1284.5,1.0 26.9,1.0 21.0,10.5 11.6,27.9 151.1,76.0 159.8,254.8 317.0,349.4 81.7,1031.4 177.9,1967.7 1270.5,2044.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1330.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1141739,42.3212872]}},{"type":"Feature","properties":{"resourceCoords":[1330.0,160.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1120787,42.3216119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p102","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0102","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.4,1853.8 654.1,1862.5 880.4,1881.1 1070.9,1924.1 1139.0,1694.4 1155.8,1695.0 1351.4,1073.5 1410.2,1013.9 1219.7,867.0 1075.3,735.1 923.8,586.4 812.8,484.5 681.7,375.6 439.4,193.1 320.5,123.9 247.4,91.7 222.2,93.8 167.6,42.2 168.2,45.7 173.0,59.3 189.7,112.0 149.8,143.3 1.0,182.9 1.0,630.1 228.1,845.6 241.8,1684.0 241.4,1853.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1118505,42.3205942]}},{"type":"Feature","properties":{"resourceCoords":[242.0,1726.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1138728,42.3213297]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p103","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0103","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.7,142.9 532.0,153.9 1276.1,132.4 1281.1,531.0 1270.4,750.0 1235.1,935.2 1459.0,993.5 1459.0,1009.7 1367.0,984.1 1359.7,1630.3 1249.5,1806.0 1083.5,1913.2 290.5,1800.4 135.6,1745.7 82.0,1662.7 80.0,1305.2 211.9,1132.9 262.9,724.4 112.4,596.0 81.5,464.6 160.7,157.3 298.3,134.8 298.6,120.3 398.7,142.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1286.0,545.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1139867173138,42.3205421821629]}},{"type":"Feature","properties":{"resourceCoords":[748.0,142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11546496435687,42.32111569546601]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p104","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0104","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"918.2,1476.5 844.7,1540.1 705.5,1671.6 702.7,1674.1 680.4,1693.6 402.4,1905.1 337.5,1947.2 170.1,2032.1 108.0,1691.5 97.2,1533.0 107.9,1193.8 110.5,900.0 112.5,204.2 957.5,238.9 1107.5,245.2 1319.0,549.8 1312.3,552.4 1405.7,871.6 1379.2,882.0 1037.1,1357.8 1053.7,1373.1 918.2,1476.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0104/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[642.0,226.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1047621,42.3217839]}},{"type":"Feature","properties":{"resourceCoords":[110.0,1007.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1068177,42.3225385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p105","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0105","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.3,1886.8 147.0,1904.1 538.5,1992.1 1285.8,1953.8 1295.7,1954.7 1292.8,1934.2 1344.8,1931.7 1365.5,1076.7 1358.2,1076.3 1387.7,491.8 1406.2,404.0 1328.1,384.7 1097.3,333.6 1001.5,318.6 811.7,297.1 778.8,292.1 438.6,216.3 364.9,194.0 192.3,121.1 60.4,289.6 2.4,336.7 1.0,338.5 1.0,414.7 18.6,430.4 45.0,504.6 75.9,636.5 109.2,933.5 120.0,1101.0 122.2,1249.4 118.2,1458.5 121.5,1651.1 145.3,1886.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[116.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11067436307974,42.32078872130446]}},{"type":"Feature","properties":{"resourceCoords":[1298.0,1935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1093504842844,42.31835670540103]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0106","type":"ImageService3","width":1474,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.0,1913.0 1118.5,1958.5 1361.9,1826.3 1351.2,1764.1 1329.5,1536.3 1288.1,1037.4 1257.8,693.0 1234.7,489.2 1005.4,440.2 946.8,420.7 615.8,249.4 582.6,233.2 1.0,303.2 1.0,326.1 65.5,337.5 144.6,353.6 129.7,442.4 124.7,1029.7 132.1,1029.7 147.3,1887.8 95.2,1892.5 99.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,1040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1066333203025,42.318826152658005]}},{"type":"Feature","properties":{"resourceCoords":[1283.0,1040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10581385437663,42.318406223895245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p107","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0107","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"549.7,1930.6 447.6,1592.1 365.8,1318.5 334.0,1187.9 325.4,1131.1 306.0,965.7 282.5,701.7 271.5,498.7 256.9,230.2 254.4,177.6 400.4,168.9 458.1,178.3 740.5,309.3 1008.9,424.6 922.0,600.0 850.7,761.9 902.9,771.6 1148.0,860.6 1262.1,920.8 1224.6,1000.0 1221.6,1077.1 1309.7,1444.6 1374.4,1733.3 549.7,1930.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[912.0,1844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.104799,42.3220672]}},{"type":"Feature","properties":{"resourceCoords":[922.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1018181,42.3217412]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p108","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0108/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0108","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"467.8,1933.4 410.6,1910.5 91.9,1720.2 84.4,1716.0 272.6,1442.9 278.9,1446.5 381.4,1091.2 291.9,971.2 530.1,798.4 831.1,573.4 902.8,545.8 989.8,548.8 999.9,420.9 984.8,162.1 973.1,110.6 1149.0,112.0 1343.4,122.3 1337.0,910.0 1341.1,1071.7 1346.8,1327.0 1335.7,1789.1 1301.2,1788.5 1112.8,1758.8 848.2,1708.3 773.9,1689.1 704.5,1851.9 692.9,1910.7 692.8,1995.9 467.8,1933.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1149.0,112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1018181,42.3217412]}},{"type":"Feature","properties":{"resourceCoords":[1337.0,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1024353,42.3203371]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p109","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0109/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0109","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1162.4,1957.4 184.1,1974.1 184.0,1971.0 187.6,1176.5 186.2,883.6 193.7,571.5 179.2,514.6 112.8,383.9 508.8,197.5 639.9,141.5 1135.6,1020.7 1257.5,1245.0 1356.7,1463.7 1384.0,1602.0 1324.7,1622.8 1260.0,1690.0 1220.0,1746.7 1189.6,1827.2 1162.8,1950.3 1162.4,1957.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0109/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1338.0,1420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0993638,42.3201006]}},{"type":"Feature","properties":{"resourceCoords":[184.0,1971.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1024353,42.3203371]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0011","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"291.6,1598.0 212.2,1097.2 210.0,1049.5 228.7,720.8 243.1,594.6 275.3,121.9 451.1,133.9 543.8,134.6 660.3,99.7 706.3,178.3 793.7,278.3 1116.5,14.6 1125.2,58.7 1114.2,78.2 1195.1,353.6 1148.6,1933.4 1002.4,1986.9 444.7,1897.3 324.5,1823.5 278.9,1712.9 291.6,1598.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1142.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07284286613097,42.3276120342912]}},{"type":"Feature","properties":{"resourceCoords":[549.0,474.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07514579946476,42.32774892018664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p110","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0110","type":"ImageService3","width":1452,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"991.0,1987.8 321.9,1997.5 269.6,2029.1 225.3,1643.2 193.0,1306.5 189.9,1190.1 196.6,952.9 208.7,490.1 203.6,234.3 199.9,75.5 1171.5,64.6 1165.3,180.1 1147.1,452.2 1145.2,526.1 1164.6,648.2 1217.2,814.0 1220.6,892.5 1210.7,993.3 1157.0,1234.7 1078.4,1687.7 1037.5,1939.7 1026.0,2045.6 991.0,1987.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1165.0,1166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10180114735643,42.317756719460576]}},{"type":"Feature","properties":{"resourceCoords":[169.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1025039519292,42.3203602025626]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p111","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0111/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0111","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"459.2,1737.0 475.1,1509.4 515.9,1011.8 542.2,667.9 552.9,463.7 561.9,378.9 579.5,321.5 665.5,166.6 737.5,193.5 995.8,271.3 1180.4,320.4 1214.7,324.6 1184.0,559.9 1175.2,676.0 1173.2,1014.2 1178.0,1402.5 1172.2,1405.2 1105.2,1702.3 821.5,1786.7 526.5,1776.8 459.6,1800.0 459.2,1737.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[509.0,1023.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10582680637997,42.318391822566895]}},{"type":"Feature","properties":{"resourceCoords":[509.0,1525.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10634855760975,42.31757555141963]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p112","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0112","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.2,1211.5 279.2,965.6 317.5,778.1 391.9,484.4 455.1,202.7 455.0,171.7 612.7,95.6 731.6,58.7 805.5,50.0 1079.3,29.3 1202.4,18.3 1262.2,760.7 1283.9,1110.8 1263.8,1375.6 1255.0,1575.2 1225.7,1830.2 1221.8,1925.5 1017.5,1939.2 866.8,1944.3 508.2,1962.3 343.2,1967.6 158.8,1982.9 78.0,1989.5 86.2,1900.7 120.2,1678.4 174.4,1369.7 198.9,1251.2 206.2,1211.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0112/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[603.0,1953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09769423527338,42.31643956958877]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09893164771185,42.318677014161075]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p113","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0113/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0113","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.2,1445.9 222.1,1192.7 198.0,736.3 196.6,490.6 183.9,390.8 163.2,315.4 193.7,312.8 476.0,352.2 770.9,401.6 958.5,424.1 1206.3,476.1 1246.0,480.0 1247.8,514.5 1192.2,883.1 1149.8,1079.3 1237.2,1122.2 1260.4,1515.4 1250.3,1512.8 1194.4,1822.5 978.2,1853.8 364.4,1669.0 250.5,1551.1 238.2,1445.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0113/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[871.0,953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1010879,42.3165307]}},{"type":"Feature","properties":{"resourceCoords":[1246.0,480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.099624,42.316675]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p114","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0114/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0114","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"330.0,1255.8 339.9,1259.5 358.2,860.4 274.5,807.9 338.1,614.5 433.2,248.5 435.1,213.5 553.2,240.8 860.9,302.0 1082.7,341.1 1171.3,351.2 1172.0,478.4 1237.9,906.7 1233.1,1735.9 1168.2,1824.9 850.0,1872.1 358.1,1709.4 252.2,1561.7 240.8,1562.2 330.0,1255.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0114/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[396.0,1640.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.101817,42.314713]}},{"type":"Feature","properties":{"resourceCoords":[1196.0,1091.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.099481,42.314606]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0012","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"627.0,1859.3 1197.7,1997.9 1314.0,1983.7 1356.1,1877.0 1361.7,1884.5 1345.8,1770.8 1147.2,1308.1 1133.5,1262.8 1071.2,941.9 1054.3,816.8 970.0,354.0 913.1,23.2 908.9,1.0 904.0,1.0 875.6,7.2 512.5,85.1 563.3,325.5 610.8,589.2 181.0,698.6 346.3,1389.8 434.8,1733.0 535.6,1762.3 636.5,1823.1 627.0,1859.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1067.0,933.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07525655740409,42.32703884938505]}},{"type":"Feature","properties":{"resourceCoords":[185.0,689.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07738171220613,42.32654695243704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p13","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0013","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"301.8,812.2 308.0,788.5 65.2,729.1 185.0,255.0 872.4,428.0 1216.6,508.2 1289.1,432.6 1389.4,371.4 1417.0,396.6 1401.9,415.9 1384.7,1865.1 1030.6,1862.5 644.4,1858.4 422.0,1861.0 135.7,1853.9 40.4,1846.2 68.8,1767.6 170.5,1311.2 301.8,812.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[422.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.078808,42.323798]}},{"type":"Feature","properties":{"resourceCoords":[185.0,255.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0773771,42.3265284]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0014","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"322.8,1578.0 533.8,1737.7 826.1,1958.0 1123.1,1565.4 1386.2,1206.1 1181.0,1032.1 988.1,878.2 1219.6,586.0 1241.0,559.0 1100.0,468.6 819.4,350.2 347.1,154.0 272.9,112.7 220.4,485.3 212.2,568.5 58.8,743.4 1.0,766.6 1.0,934.2 215.5,1269.5 215.4,1433.7 221.4,1472.9 257.2,1524.4 322.8,1578.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1133.0,1550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07734896833249,42.32655377846615]}},{"type":"Feature","properties":{"resourceCoords":[277.0,132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07901156071883,42.32925478723361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p15 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"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":"5848.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0015","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.7,1917.0 207.4,1926.3 673.5,1919.6 967.6,1926.5 1187.6,1931.6 1212.0,1932.2 1213.6,1683.1 1217.9,1320.7 1218.5,1275.4 1221.6,1058.7 1225.9,974.9 1246.0,916.2 1273.7,888.4 1404.7,792.2 1461.0,646.2 1461.0,285.1 1144.7,398.3 803.1,861.7 725.8,956.1 664.3,1013.4 379.6,1004.4 135.9,1010.4 128.1,1389.5 128.5,1604.0 124.7,1917.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[397.0,1005.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0807789,42.3256464]}},{"type":"Feature","properties":{"resourceCoords":[670.0,1609.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0792417,42.3252629]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0016","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"88.0,1686.2 89.2,1664.8 161.5,1633.0 204.8,1311.8 212.8,1149.1 230.1,945.4 258.9,754.2 306.0,536.2 320.4,443.5 386.7,206.7 881.3,273.9 1145.5,269.2 1379.5,257.4 1457.4,418.7 1255.3,884.7 1360.0,1451.3 1376.0,1572.5 1375.8,1656.5 1174.3,1858.4 1011.9,2040.5 848.7,1898.9 739.3,1843.8 208.7,1682.2 155.1,1680.0 153.9,1701.1 88.0,1686.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[302.0,535.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08295179391119,42.32801187332868]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08031516957577,42.326045236668634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p17","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.52"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0017","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"574.6,2058.7 631.4,1964.0 86.7,424.3 425.7,397.4 607.7,366.1 673.9,340.8 719.4,309.1 911.5,124.4 914.9,121.3 1217.7,627.8 1154.5,738.1 1143.0,777.0 1208.2,800.2 1396.5,905.8 1243.8,1092.0 1194.3,1169.5 1066.2,1346.4 965.1,1506.5 869.4,1682.3 798.0,1825.0 632.6,2096.0 555.4,2096.0 574.6,2058.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[798.0,1825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.083184,42.326607]}},{"type":"Feature","properties":{"resourceCoords":[1641.0,602.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0824959,42.3293014]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p18","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0018","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.5,1165.4 36.9,1188.7 83.4,1302.5 165.7,1548.8 174.1,1627.0 216.2,1826.0 338.9,1882.0 431.9,1906.6 464.6,1917.4 576.6,1925.9 787.1,1934.0 1068.1,1934.8 1133.7,1954.5 1176.8,1998.3 1225.5,1956.2 1315.4,1888.3 1387.8,222.2 1378.8,219.4 1217.5,183.0 1124.9,182.8 1048.2,193.5 907.0,249.0 566.7,414.0 523.4,436.3 331.8,532.6 91.8,650.6 1.0,985.1 1.0,1058.4 45.5,1165.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,1933.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0841159,42.3256046]}},{"type":"Feature","properties":{"resourceCoords":[907.0,249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086996,42.327782]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p19 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5488.0"},{"label":"split_canvas_w","value":"5876.0"},{"label":"split_canvas_h","value":"2900.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1104.2,1804.5 1104.8,1498.5 748.9,1502.6 589.1,1500.8 392.3,1507.5 355.8,1508.8 402.6,1809.8 406.9,1906.8 702.9,1898.5 802.0,1898.0 1020.9,1902.4 1109.8,1898.9 1107.6,1862.2 1104.2,1804.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[802.0,1898.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.092476,42.321307]}},{"type":"Feature","properties":{"resourceCoords":[608.0,1501.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0934859,42.3215724]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p19 [2]","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":"5876.0"},{"label":"split_canvas_h","value":"5529.6"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1183.1,522.9 1300.4,162.3 1106.7,115.2 1012.9,97.1 929.8,103.7 693.8,161.7 578.8,172.1 527.6,171.8 438.0,151.0 388.3,334.1 317.1,621.6 223.2,990.7 219.7,1066.4 225.3,1131.5 256.9,1299.8 654.8,1260.3 802.0,1242.9 1176.8,1207.8 1131.7,926.2 1124.0,756.3 1141.2,654.1 1183.1,522.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0019__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[905.0,106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08974320252457,42.32813197836618]}},{"type":"Feature","properties":{"resourceCoords":[929.0,1258.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08712618118358,42.32733283081238]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0002","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.9,1873.8 41.5,1764.7 63.9,1774.6 131.8,1180.4 92.9,1179.6 48.3,184.4 60.5,183.7 288.8,172.2 539.9,151.0 1386.5,64.5 1395.0,242.7 1415.4,242.6 1418.2,1879.8 1374.0,2007.2 1226.5,1927.4 1244.9,1893.8 217.7,1842.6 185.9,1828.6 189.4,1909.6 67.9,1873.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[83.0,124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09512671990096,42.33487513171896]}},{"type":"Feature","properties":{"resourceCoords":[1402.0,2546.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08839748853478,42.33475135848853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p20","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0020","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"566.0,1643.2 573.5,1649.4 846.9,1874.5 1005.9,1982.8 1045.1,1934.5 1161.7,1624.5 1205.3,1484.3 1360.8,869.5 1326.8,503.8 1333.1,387.3 1258.5,361.4 1220.8,310.5 1166.6,213.2 887.1,294.3 661.1,366.2 639.2,247.7 582.1,1.0 454.7,1.0 359.0,153.0 264.0,423.0 87.4,922.5 67.0,1026.7 70.2,1200.9 108.6,1490.6 263.3,1492.2 339.9,1511.5 427.5,1547.0 566.0,1643.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,423.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089227,42.328749]}},{"type":"Feature","properties":{"resourceCoords":[359.0,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089741,42.329085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p21","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0021","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"323.0,444.4 830.2,303.6 1052.1,85.4 1267.3,181.9 1293.2,268.6 1091.0,605.3 1031.4,1819.8 943.0,1789.6 898.0,1729.7 833.3,1614.8 503.0,1712.5 236.0,1799.0 209.3,1658.8 136.9,1353.4 100.2,1143.6 119.3,807.9 122.6,658.0 234.6,642.3 168.9,560.1 323.0,444.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[236.0,1799.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.088995,42.329439]}},{"type":"Feature","properties":{"resourceCoords":[-277.0,-962.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094561,42.330304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0022","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"467.2,201.0 593.7,189.4 787.0,163.9 836.9,177.6 917.0,283.5 962.8,247.4 972.9,285.6 1138.7,426.7 1313.3,707.0 1356.6,938.6 1398.6,913.6 1445.6,988.3 1351.3,991.0 1335.1,1115.6 1288.9,1393.8 1300.3,1572.2 1301.7,1583.1 1177.4,1569.7 1067.2,1710.5 946.5,1967.2 758.2,1893.2 618.4,1854.2 337.8,1884.1 169.6,1871.8 82.4,1838.6 123.1,1704.3 211.1,1444.7 260.2,1247.1 307.4,1034.6 337.9,826.9 72.0,809.9 76.4,494.5 90.2,204.3 467.2,201.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09441815896315,42.328094162720575]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09343763645477,42.330627104429055]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08857773309401,42.3295843071741]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0895582556024,42.32705136546562]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p23","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0023","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1091.0,1251.4 986.9,1258.0 897.3,1242.7 774.7,1158.5 753.6,1331.3 758.1,1436.0 784.3,1793.2 717.9,1789.5 179.6,1802.7 167.3,1644.4 147.9,1477.9 132.6,1217.5 125.6,979.9 129.1,638.3 135.3,554.7 166.7,370.2 181.6,292.1 458.3,293.9 530.2,279.3 529.5,284.1 913.6,488.9 1180.5,357.7 1224.5,395.5 1137.7,493.9 1134.3,545.1 1197.2,728.5 1233.5,849.5 1311.2,1216.3 1091.0,1251.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[870.0,771.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0943395,42.3292285]}},{"type":"Feature","properties":{"resourceCoords":[515.0,284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094561,42.330304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0025","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"313.1,1745.4 262.7,1472.0 257.2,1472.0 324.1,1399.9 469.6,1398.3 578.1,936.2 521.1,825.6 321.4,452.7 361.4,461.2 939.3,345.4 1221.0,291.9 1291.0,772.1 1272.6,770.8 1327.7,1349.2 1322.2,1342.5 1166.7,1436.4 991.8,1784.5 341.1,1813.6 313.1,1745.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1285.0,988.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09467865473152,42.33254922357158]}},{"type":"Feature","properties":{"resourceCoords":[521.0,836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09611821808565,42.33164014202509]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0026","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.8,58.5 359.2,56.2 399.6,62.6 527.0,97.2 779.0,100.0 849.5,44.5 907.0,88.5 1096.4,108.0 1387.0,318.6 1350.9,357.5 1322.5,387.9 1378.5,422.6 1467.0,483.1 1467.0,651.4 1423.1,653.1 1327.2,1992.4 1203.9,1996.4 970.3,1996.1 740.8,1997.3 522.9,1993.7 129.1,1993.1 128.8,1336.9 123.5,524.4 101.4,76.2 230.8,58.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1128.0,1985.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09488041573255,42.33504297400007]}},{"type":"Feature","properties":{"resourceCoords":[944.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09785326866445,42.335799309420636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0027","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4.8,384.6 1.0,419.4 1.0,428.9 35.4,447.9 126.3,503.9 134.4,671.1 90.9,675.0 60.1,2010.8 193.2,2000.0 1054.2,1914.9 1062.2,2096.0 1083.0,2096.0 1083.1,2007.2 1406.5,1883.0 1400.1,1316.4 1391.2,1311.3 1392.5,1188.6 1401.7,1194.4 1421.2,272.1 1332.0,147.9 1114.1,88.8 1063.8,1.0 1062.4,1.0 1056.0,8.6 1027.8,177.2 845.4,184.8 636.1,173.8 426.5,150.7 257.2,124.5 195.1,194.0 122.3,245.3 38.9,344.3 4.8,384.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1405.0,1226.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09467812408674,42.33811365116186]}},{"type":"Feature","properties":{"resourceCoords":[1405.0,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09713007625676,42.3391520605361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0028","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"116.1,1357.0 116.9,1235.1 126.0,1240.9 141.8,325.4 680.1,127.2 964.2,241.8 1158.4,155.6 1371.9,555.0 1430.3,1017.8 1404.4,1816.9 1348.0,1945.4 225.8,1888.5 133.5,1924.3 124.9,1362.0 116.1,1357.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1108.0,1863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09225592025278,42.33909974616503]}},{"type":"Feature","properties":{"resourceCoords":[142.0,1283.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09464024746188,42.338123527150906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p29","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0029","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.7,1821.9 285.1,405.1 333.3,407.9 350.6,239.8 354.9,68.7 597.7,99.8 898.5,102.5 1146.3,80.5 1139.4,162.6 1117.2,634.9 1136.0,991.0 1154.1,1184.4 1198.6,1608.3 1234.2,1805.9 1260.3,1915.8 1073.2,1928.1 792.6,1972.0 626.3,1980.0 425.2,1885.7 221.5,1826.1 201.7,1821.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[473.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0979713,42.3305067]}},{"type":"Feature","properties":{"resourceCoords":[1136.0,991.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.099319,42.332276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0030","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.1,1832.2 267.1,1637.5 204.3,1218.4 177.8,1027.1 143.5,674.2 144.8,204.2 148.0,122.3 666.4,105.8 1360.1,79.3 1383.2,517.2 1391.0,1311.2 1393.4,1952.3 1250.2,1954.3 965.2,1953.0 379.3,1956.2 341.9,1940.2 311.1,1832.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[189.0,1011.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09934149613983,42.33230731887353]}},{"type":"Feature","properties":{"resourceCoords":[970.0,1960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09640466941326,42.332778043035454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0031","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"161.8,1032.0 267.5,849.5 406.2,677.7 437.9,515.2 462.0,233.9 494.5,50.4 915.0,44.2 1038.6,44.5 1397.1,351.2 1332.0,480.4 1365.2,572.4 1331.3,638.0 1248.8,805.7 1219.1,884.0 1118.7,1210.0 1058.0,1439.5 998.6,1693.2 969.8,1858.0 936.6,2013.1 627.6,1921.3 431.6,1859.2 415.9,1939.7 65.1,1940.2 61.1,1846.4 48.9,1620.2 51.1,1413.6 69.1,1275.2 92.2,1193.7 148.4,1059.5 161.8,1032.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[715.0,942.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09703312303948,42.33012671131612]}},{"type":"Feature","properties":{"resourceCoords":[929.0,1986.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09700216031855,42.32820040910701]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0032","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.7,473.3 120.2,189.8 103.5,98.8 112.0,93.8 176.8,160.6 275.1,242.2 316.5,262.2 445.7,279.9 518.7,277.6 853.0,314.3 1035.7,338.2 1288.0,420.0 1351.4,428.9 1373.5,429.6 1346.9,783.0 1426.8,805.1 1349.1,997.7 1232.8,1301.8 1051.4,1813.8 1024.0,1875.0 949.2,1907.6 626.8,1819.2 118.0,1600.7 129.0,1603.1 189.2,1616.2 174.9,1327.8 164.5,1030.0 123.2,470.9 134.7,473.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[155.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0979126596778,42.3262856849463]}},{"type":"Feature","properties":{"resourceCoords":[155.0,1578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09662837202158,42.32617717263479]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0033","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.4,1239.9 179.6,911.5 138.6,841.7 200.3,488.2 221.4,385.4 284.0,222.7 382.6,334.4 465.9,371.1 568.6,390.1 791.1,409.6 1077.4,437.6 1389.0,457.4 1384.4,546.2 1358.8,771.5 1340.4,1007.2 1320.5,1279.7 1331.0,1385.8 1369.9,1624.4 1391.5,1791.7 1429.9,1996.0 1293.8,1959.3 1082.0,1881.7 809.5,1776.8 225.7,1546.3 151.9,1503.4 120.8,1452.6 110.8,1395.2 87.8,1384.5 130.4,1239.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[809.0,1772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09460846037864,42.32575157711809]}},{"type":"Feature","properties":{"resourceCoords":[252.0,220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09505638394764,42.32870495543158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0034","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"139.8,1533.2 140.0,1478.0 172.0,1350.8 508.7,646.1 526.6,602.0 522.2,525.5 452.9,313.7 676.3,232.4 893.0,161.9 976.1,129.1 1229.3,45.7 1277.2,249.2 1311.5,463.3 1338.3,664.3 1351.9,937.2 1363.4,1076.6 1360.0,1268.7 1360.0,1735.9 1069.2,1717.0 814.8,1720.3 754.4,1750.0 730.3,1784.4 694.4,1872.8 661.1,1911.7 620.8,1921.6 216.1,1989.7 139.8,1533.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[976.0,1035.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09075795191939,42.32681916127341]}},{"type":"Feature","properties":{"resourceCoords":[1326.0,1035.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09023726763239,42.32731482250038]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0035","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1439.5,1110.4 1273.8,1570.1 1218.9,1737.0 1155.8,1852.5 986.7,2075.7 897.6,2005.7 851.8,1980.1 746.5,1959.2 727.0,1920.8 526.9,1618.9 490.9,1634.8 214.7,1700.8 160.8,1365.7 116.4,1016.4 96.5,808.2 90.1,638.6 72.9,395.9 72.0,288.7 116.8,17.4 335.4,62.1 404.0,96.3 433.6,133.8 879.5,775.9 974.3,866.8 1022.1,894.4 1456.9,1054.3 1439.5,1110.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[104.0,1001.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09328619305909,42.32513099241862]}},{"type":"Feature","properties":{"resourceCoords":[1270.0,1552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09067899862934,42.32385797596651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0036","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1434.2,1306.9 1380.1,1297.6 875.4,1638.8 847.1,1826.5 796.0,1845.8 577.9,1840.6 347.4,1847.7 322.9,1364.4 317.4,1306.5 299.2,900.0 294.3,859.1 259.9,821.6 177.3,775.7 146.3,747.9 124.4,684.9 151.8,434.1 205.4,150.2 420.6,175.6 560.6,155.7 724.3,103.0 719.9,83.2 1039.2,256.4 1030.0,343.2 1446.7,1252.5 1432.2,1262.3 1434.2,1306.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[605.0,1291.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0894364244869,42.32445014988481]}},{"type":"Feature","properties":{"resourceCoords":[309.0,1848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0907569611239,42.32385998489807]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0037__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p37 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"},{"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":"5848.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0037__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0037","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.5,111.2 154.3,419.6 109.6,444.6 169.5,495.2 392.3,651.6 285.6,812.6 206.7,901.3 46.5,973.5 209.7,1347.9 265.4,1447.6 339.4,1658.2 341.8,1677.1 655.3,1964.7 445.1,2052.4 441.5,2096.0 492.0,2096.0 550.5,2073.4 881.0,1943.1 1153.2,1827.2 1297.9,1761.7 1412.0,1731.2 1461.0,1727.3 1461.0,1608.4 1459.4,1597.1 1418.0,1541.3 1189.6,1370.7 1023.1,1236.7 937.0,1162.0 917.0,1133.4 856.2,1057.0 790.1,937.2 876.2,749.6 916.6,680.9 998.8,430.6 1029.8,309.6 1050.8,295.9 1087.1,151.1 1110.3,132.8 1033.1,89.2 53.5,111.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0037__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[937.0,1162.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0848217,42.3251073]}},{"type":"Feature","properties":{"resourceCoords":[173.0,1259.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.084831,42.323735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p38","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0038","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.0,1833.7 257.9,2096.0 392.0,2096.0 572.6,2023.0 916.5,1883.9 916.0,1869.6 917.0,1823.0 1222.1,1817.5 1384.0,1810.9 1370.4,1439.5 1365.0,1078.0 1362.8,833.5 1365.3,697.0 1363.7,441.0 1372.1,328.0 1395.0,228.8 1452.9,90.1 1355.9,142.1 1184.0,287.4 1110.2,375.7 816.4,664.0 690.8,539.0 578.9,496.6 389.0,454.0 321.8,720.0 295.6,794.5 256.0,761.5 1.8,967.2 15.2,1000.2 1.0,1009.0 1.0,1055.5 41.3,1064.2 92.2,1189.3 121.0,1188.8 121.0,1395.1 128.1,1559.1 125.3,1832.6 130.0,1833.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[917.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08666,42.321691]}},{"type":"Feature","properties":{"resourceCoords":[389.0,454.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086213,42.324264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p39","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0039","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"409.1,1448.7 315.3,1378.2 161.7,1251.7 105.6,1215.2 246.7,1020.4 328.4,913.8 476.6,710.3 549.2,625.8 625.3,560.7 752.1,484.8 663.7,471.9 1021.6,248.9 1049.5,473.0 1109.0,494.9 1128.1,712.4 1191.5,1252.3 1206.3,1412.8 1235.6,1647.2 1245.5,1765.0 1180.6,1755.8 1184.9,1794.2 876.4,1656.7 873.5,1633.0 811.5,1627.8 722.7,1620.4 655.2,1598.0 522.2,1527.6 441.5,1472.9 409.1,1448.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1248.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081923,42.321727]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0829297,42.3246902]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p4","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.10"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0004","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.6,371.4 134.8,560.3 247.9,607.5 256.8,930.4 153.2,1462.3 240.7,1868.1 1301.2,1660.8 1233.0,510.4 1238.2,497.1 1087.1,406.6 1108.0,372.2 32.7,271.8 1.0,256.2 1.0,341.2 89.6,371.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[457.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0882574,42.3331744]}},{"type":"Feature","properties":{"resourceCoords":[875.0,760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0894186,42.3344314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0040","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.4,1349.2 170.7,1135.0 192.3,1019.4 254.7,672.8 298.8,382.9 318.9,226.6 352.7,114.5 385.1,51.3 433.5,75.3 854.8,441.1 932.8,536.5 1024.8,733.4 1165.6,1088.2 1249.9,1287.1 1368.6,1578.9 1063.5,1604.7 1057.2,1756.2 1060.8,1844.4 894.2,1886.0 652.2,1962.1 609.8,1969.2 487.9,1958.4 38.9,1885.5 128.4,1349.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1014.0,720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08124209464361,42.325308032027124]}},{"type":"Feature","properties":{"resourceCoords":[40.0,1875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.082251290812,42.32269687466779]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p41","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0041","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1382.1,364.4 1382.4,1100.2 1384.6,1423.2 1381.0,1821.0 863.6,1913.8 586.8,1976.0 465.0,1892.8 265.8,1768.2 132.8,1679.0 373.7,1296.4 430.9,1189.0 440.8,1147.4 465.1,896.4 491.6,727.7 409.4,696.8 273.2,632.3 368.0,343.0 462.3,328.7 742.0,270.0 957.4,216.6 1333.3,132.1 1382.1,364.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[368.0,343.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0796,42.324161]}},{"type":"Feature","properties":{"resourceCoords":[1381.0,1821.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080241,42.320956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0042","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"980.5,1883.0 761.3,1868.2 454.2,1837.7 99.2,1799.2 216.4,1413.6 306.5,1099.1 516.4,384.0 535.3,144.4 892.4,166.5 892.0,171.8 1154.6,699.5 1083.0,996.7 1183.7,1351.8 1206.4,1855.3 1228.4,1885.7 980.5,1883.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1364.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07616645252007,42.32194176212843]}},{"type":"Feature","properties":{"resourceCoords":[205.0,1456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0796431808639,42.32142027696922]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0043","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"428.7,439.7 472.9,449.4 465.4,483.7 256.1,1065.2 166.9,1338.0 78.7,1676.9 1.0,1958.9 1.0,1984.8 2.7,2023.0 53.2,1995.8 402.8,2023.8 880.0,1825.7 940.2,1584.0 1005.6,1373.0 1106.8,1079.8 1227.1,741.7 1406.5,237.6 1458.0,70.2 1458.0,1.0 1413.5,1.0 974.3,210.7 621.9,372.9 486.5,424.9 428.7,439.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1226.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08026421257509,42.320957942835264]}},{"type":"Feature","properties":{"resourceCoords":[981.0,207.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08162591594875,42.32074509041025]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0044","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"56.9,2046.6 98.1,2013.5 453.9,1993.8 1247.9,1691.2 1334.6,1616.6 1319.1,1561.3 1334.8,1266.8 1348.4,921.4 1376.9,639.5 1456.0,34.7 1456.0,1.0 1409.2,1.0 1271.2,57.1 1074.1,116.4 925.3,146.0 626.5,174.0 591.9,360.1 529.1,655.2 503.0,732.3 388.9,1030.8 292.6,1261.8 182.2,1542.1 108.1,1720.2 70.8,1913.5 56.9,2046.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[606.0,1886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07807733185079,42.31693015416135]}},{"type":"Feature","properties":{"resourceCoords":[1355.0,1647.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07782017568674,42.318332167564556]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0045","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.4,1747.2 152.4,1573.5 301.1,894.0 305.1,842.2 295.8,324.7 278.6,92.0 505.4,74.7 828.9,73.0 1009.4,65.5 1268.2,46.1 1326.5,41.9 1436.7,36.3 1398.6,223.0 1330.2,518.7 1302.6,595.8 1182.6,894.1 1081.6,1124.7 965.6,1404.8 888.0,1582.6 847.0,1776.4 830.8,1910.1 744.1,1977.3 564.4,2001.0 103.1,1970.2 82.8,1973.2 118.4,1747.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1346.0,453.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08099205199468,42.317830258626635]}},{"type":"Feature","properties":{"resourceCoords":[63.0,1988.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07889403473048,42.3146056361274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0046","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"245.7,1550.5 232.1,1280.3 420.4,1108.4 440.4,1090.0 214.2,253.3 216.1,252.9 260.6,244.7 1118.7,118.4 1333.8,114.1 1351.2,344.7 1361.3,857.5 1357.4,908.9 1211.0,1582.4 1177.7,1754.6 1142.7,1978.6 755.9,2037.8 284.6,1961.6 245.7,1550.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[740.0,1303.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08081520934805,42.31449321527904]}},{"type":"Feature","properties":{"resourceCoords":[1128.0,1995.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07888530703966,42.31461234364632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0047","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"395.4,1471.7 384.6,1389.0 360.7,1335.2 280.9,1200.6 186.1,1025.4 113.3,901.3 234.2,782.1 428.6,549.6 527.8,455.0 616.3,387.2 766.9,290.6 947.1,188.8 1107.4,135.7 1128.3,131.2 1348.9,974.4 1328.8,992.7 1289.8,1027.7 1139.2,1163.0 1151.0,1434.7 1187.2,1848.2 1092.7,1926.7 848.3,1928.3 402.7,1863.2 345.4,1789.8 395.4,1471.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08508230850192,42.31264858258739]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0836399132415,42.31506453857497]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07898975848956,42.313524916576775]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08043215374998,42.311108960589195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0048","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.7,1729.5 316.4,1489.3 299.8,1401.7 266.6,1306.8 233.4,1326.1 102.1,1155.0 93.2,1091.5 106.7,981.6 181.6,569.5 214.3,432.9 250.2,196.6 269.9,103.2 453.2,113.8 590.4,136.6 725.8,182.8 815.1,252.7 984.0,427.2 1018.6,451.0 1087.7,475.7 1199.2,497.1 1338.2,540.4 1439.9,555.5 1347.0,655.8 1167.7,899.0 1054.7,1025.0 1134.5,1143.2 1239.5,1310.4 1327.1,1438.5 1354.2,1490.2 1369.8,1571.4 1339.5,1889.9 444.4,1963.0 298.8,1854.0 311.7,1729.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[685.0,1887.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08152183198696,42.31085758105001]}},{"type":"Feature","properties":{"resourceCoords":[313.0,1887.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08194405401818,42.31026088623683]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0049","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.9,1903.3 100.5,1903.4 128.1,1333.0 199.6,906.7 227.3,717.7 280.2,387.6 294.4,100.7 669.2,124.9 763.9,127.9 1221.7,136.9 1200.5,230.9 1161.1,469.1 1126.2,606.4 1045.1,1021.5 1030.0,1132.3 1038.1,1196.6 1168.3,1371.0 1202.1,1352.0 1234.3,1448.3 1250.0,1537.0 1242.0,1779.4 1227.2,1904.9 1220.8,1899.9 208.0,1915.0 56.0,1971.9 66.9,1903.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[137.0,1340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08444781466848,42.30897946413809]}},{"type":"Feature","properties":{"resourceCoords":[1215.0,120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08590593118713,42.3116919596987]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p50","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0050","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.7,1660.3 150.0,1236.4 135.5,960.2 336.2,947.9 377.1,515.5 420.7,107.0 568.6,103.3 1053.0,88.7 1280.3,77.8 1291.0,367.2 1266.5,703.2 1255.0,895.4 1220.3,1329.7 1242.1,1904.8 1208.3,1907.6 1203.3,1977.5 1144.8,1988.8 1103.0,2025.2 780.9,1966.2 323.4,1991.0 205.4,1930.2 192.0,1939.0 178.7,1660.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[740.0,924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0859109,42.3086249]}},{"type":"Feature","properties":{"resourceCoords":[872.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0874426,42.3096034]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0051","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1057.6,42.5 1375.4,72.9 1291.1,474.0 1207.1,898.9 1006.7,891.0 993.4,1166.5 979.3,1590.1 964.6,1868.0 662.7,2023.4 219.5,2029.3 153.9,1808.7 200.4,1179.9 477.5,126.9 684.7,34.2 676.1,16.6 1057.6,42.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1194.0,858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08647639949324,42.3080029566951]}},{"type":"Feature","properties":{"resourceCoords":[981.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08443050331056,42.30684155972156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p52","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0052","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"567.0,189.8 1267.1,186.6 1268.0,481.3 1273.7,806.4 1267.5,901.4 1242.3,1037.9 1176.8,1337.2 1018.3,1927.0 872.0,1930.0 555.4,1930.3 176.4,1941.1 108.1,1829.8 106.5,1540.3 155.2,1017.5 241.4,770.9 202.2,707.0 262.7,590.6 190.2,415.1 259.9,442.7 413.4,348.5 532.4,186.4 567.0,189.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,1930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.087986,42.308908]}},{"type":"Feature","properties":{"resourceCoords":[18.0,1930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0890725,42.3075989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0053","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"814.2,154.8 1292.6,130.2 1312.3,391.0 1339.8,874.0 1329.9,1506.5 1327.2,1899.5 1230.8,1907.7 847.8,1927.6 617.8,1945.5 127.7,1975.2 269.1,1365.7 325.6,1056.9 346.4,916.3 349.5,818.8 332.1,486.2 320.8,184.5 814.2,154.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1211.0,1925.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08648476993196,42.31076919309351]}},{"type":"Feature","properties":{"resourceCoords":[1314.0,173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0898172966713,42.31261890692869]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0054","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.9,1511.1 271.1,891.2 242.1,418.1 221.7,162.6 832.9,137.8 1119.8,120.3 1178.8,463.6 1195.5,629.1 1198.1,890.1 1193.8,1222.1 1198.2,1618.3 1195.7,1776.3 1185.2,1880.7 1044.2,1848.8 903.9,1840.8 718.7,1850.0 262.8,1896.1 263.9,1511.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[718.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0858588508764,42.31168603737278]}},{"type":"Feature","properties":{"resourceCoords":[265.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08639631248893,42.310975415056305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0055","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"331.3,1814.6 435.8,1864.0 642.8,1999.2 682.5,2015.0 756.7,2024.0 872.3,2020.1 1020.1,2031.8 1124.5,2023.9 1191.5,1932.5 1310.7,1795.1 1457.3,1644.0 904.0,395.2 929.0,383.8 668.5,1.0 401.6,1.0 348.1,12.9 60.6,59.8 159.7,396.6 195.8,560.5 228.7,821.4 263.1,1154.3 313.7,1550.5 329.7,1709.0 331.3,1814.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[644.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08707474158605,42.314281005366304]}},{"type":"Feature","properties":{"resourceCoords":[500.0,26.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08818322279606,42.31464260022339]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0056","type":"ImageService3","width":1475,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"228.6,1914.9 60.6,1944.8 79.5,586.8 106.9,586.9 22.3,84.3 160.9,122.1 510.1,213.9 849.4,307.4 948.2,329.2 1353.6,387.3 1304.1,733.9 1299.4,839.2 1317.8,900.6 1394.7,1044.8 1426.7,1160.2 1436.8,1287.7 1431.5,1425.9 1394.6,1849.7 1388.9,1947.3 1173.6,1918.4 297.9,1911.8 252.1,1913.2 228.6,1914.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[945.0,345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08687397555872,42.31637037235867]}},{"type":"Feature","properties":{"resourceCoords":[1362.0,1913.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08295203622565,42.316328899245526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0057","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.0,1760.7 293.0,1336.6 289.9,1198.7 272.0,1072.4 233.1,959.4 147.9,820.6 125.8,760.6 124.0,655.5 152.2,307.5 427.7,275.7 814.4,200.4 1255.0,126.8 1331.0,111.2 1309.4,684.9 1291.4,1221.8 1470.0,1849.4 1314.6,1845.4 1322.2,1903.1 1270.0,1902.2 1011.0,1898.0 831.0,1889.2 509.4,1861.5 282.4,1858.2 282.0,1760.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1147.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08607961449943,42.318830829442575]}},{"type":"Feature","properties":{"resourceCoords":[289.0,1876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08280853814148,42.31635939625187]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0058__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p58 [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":"0.0"},{"label":"split_canvas_w","value":"5848.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0058__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0058","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.5,686.0 58.6,1212.9 152.7,1854.8 1.0,1830.7 1.0,1888.6 6.0,1889.3 113.8,1908.2 410.2,1952.0 561.5,1958.6 766.7,1947.9 914.5,1926.2 973.4,1912.6 1108.0,1864.7 1459.1,1713.5 1452.6,1644.0 1401.2,1665.5 1103.5,1127.5 1078.7,1127.5 1063.3,1127.5 1355.0,1684.8 1322.7,1698.3 1030.0,1127.5 978.5,1127.5 981.7,1033.3 881.8,838.4 888.6,793.8 983.7,975.5 984.1,962.9 985.8,914.8 895.1,751.0 910.7,648.1 944.9,409.9 747.5,323.7 694.2,296.1 651.4,242.2 594.2,277.3 496.7,87.2 242.8,123.4 146.5,686.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0058__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[959.0,399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08500598446862,42.32032797552142]}},{"type":"Feature","properties":{"resourceCoords":[1341.0,1351.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08254469561577,42.32065549594792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0059","type":"ImageService3","width":1477,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"674.6,1812.3 643.4,1828.2 308.5,1281.3 257.1,1285.2 253.2,1191.0 138.9,1004.3 142.3,959.3 250.8,1133.2 248.3,1072.6 145.6,916.1 153.4,812.4 153.5,811.3 169.4,572.3 518.4,656.6 587.7,348.8 635.7,149.9 994.2,215.3 1341.5,286.3 1331.0,352.1 1278.1,543.4 1243.0,696.8 1226.0,792.5 1215.8,942.2 1222.8,1012.7 1272.5,1155.2 1252.0,1167.4 1252.0,1504.2 1285.2,1484.7 1303.2,1547.5 1276.8,1562.0 1249.4,1670.7 1245.9,1601.6 1204.2,1603.7 780.5,1833.0 768.8,1764.3 755.2,1771.2 719.1,1789.6 381.7,1275.7 341.7,1278.8 674.6,1812.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[849.0,193.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08541973947104,42.32166533423203]}},{"type":"Feature","properties":{"resourceCoords":[508.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08455637098182,42.32084279162297]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0006","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1157.9,1804.9 836.5,1774.0 693.6,1768.6 75.5,1778.7 197.6,1733.2 133.2,188.8 220.3,131.9 1185.7,274.4 1256.6,220.6 1262.4,477.4 1243.7,596.6 1212.2,683.6 1145.2,816.4 1089.5,965.7 1078.4,1062.0 1080.7,1136.9 1100.3,1248.7 1142.5,1421.4 1147.6,1440.8 1217.5,1702.2 1223.3,1758.2 1213.4,1829.5 1157.9,1804.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1414.0,554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08280306078095,42.33055328744982]}},{"type":"Feature","properties":{"resourceCoords":[631.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.085409173095,42.33037056062622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0060","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1367.2,1766.6 1239.2,1336.8 1214.2,1262.9 1114.0,1024.1 1274.9,880.4 1226.0,833.5 1267.7,777.8 1281.0,718.8 1314.8,503.9 1335.4,142.0 1017.0,128.8 810.8,117.1 650.3,117.7 348.1,112.2 345.4,158.3 345.4,172.4 1.0,297.2 1.0,635.7 176.4,732.8 375.0,991.4 319.9,1050.3 431.8,1150.0 490.7,1288.0 115.0,1262.8 52.3,1331.3 290.1,1341.2 486.7,1356.7 1.0,1962.8 1.0,1964.0 120.7,1951.8 381.6,1917.0 741.2,1859.2 1098.3,1810.8 1367.2,1766.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1310.0,495.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08498784864832,42.3203171621938]}},{"type":"Feature","properties":{"resourceCoords":[1404.0,1773.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08615211497454,42.31819755214138]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0061","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"50.4,706.7 44.5,788.8 45.1,1147.4 37.9,1519.0 48.2,1519.5 41.1,1888.0 31.9,1887.3 31.4,1903.0 1182.2,1963.6 1252.6,1666.8 1338.0,1324.2 1357.4,1224.5 1405.8,816.5 1383.9,538.4 1322.4,146.8 1049.5,147.5 688.4,138.2 323.4,137.8 59.8,130.4 59.7,132.6 1.0,210.8 1.0,656.5 52.8,674.6 50.4,706.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[57.0,1192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0898801745753,42.317120812620935]}},{"type":"Feature","properties":{"resourceCoords":[1369.0,1192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08685892812515,42.31643283944464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0062","type":"ImageService3","width":1478,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"224.8,1670.7 208.1,1425.4 203.6,1269.0 199.0,1081.8 181.1,746.7 93.8,397.6 1213.4,141.8 1215.9,198.8 1221.0,342.3 1263.8,320.6 1248.8,435.8 1230.5,581.9 1235.5,637.5 1244.9,926.9 1258.7,1214.7 1275.3,1827.4 1178.2,1829.8 782.3,1820.8 467.7,1823.0 231.1,1812.6 224.8,1670.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1244.0,528.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0882825609634,42.31460800501623]}},{"type":"Feature","properties":{"resourceCoords":[1244.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08998779212044,42.312666119260896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0063","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1313.7,1912.8 1198.2,1943.4 766.9,1837.7 697.4,1883.4 257.0,1874.1 182.1,1787.6 164.5,1609.2 305.9,1480.2 175.3,1267.5 144.1,1262.4 219.3,1186.7 245.2,1146.9 249.7,1089.6 243.0,869.4 229.5,674.5 223.4,451.9 209.9,216.6 447.0,225.8 762.3,221.9 1159.1,228.9 1256.3,226.1 1278.5,696.9 1305.8,1182.5 1330.7,1887.8 1328.2,1922.8 1313.7,1912.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[871.0,1169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09195613474652,42.31160001358998]}},{"type":"Feature","properties":{"resourceCoords":[1294.0,1557.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09161689129286,42.31060700413167]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p64","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0064","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"331.6,1338.6 375.9,1128.4 377.3,1027.7 352.6,888.6 301.8,768.2 152.3,380.5 100.7,232.1 66.8,118.2 850.0,252.7 940.0,314.8 1132.8,349.2 1216.5,370.2 1219.2,526.4 1233.2,771.3 1238.0,913.0 1247.7,1147.5 1250.1,1369.3 1260.5,1563.6 1263.6,1783.0 1258.2,1840.0 1231.8,1879.2 1155.6,1953.5 341.9,1808.0 266.1,1709.5 331.6,1338.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[265.0,669.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0937025,42.3149704]}},{"type":"Feature","properties":{"resourceCoords":[1238.0,913.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.092028,42.313668]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0065","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"215.9,1865.6 1010.7,1904.7 1107.6,1955.5 1303.5,1966.4 1389.2,1977.2 1364.1,1791.8 1309.5,1460.9 1179.0,1109.0 1187.7,1106.2 1055.8,763.7 1046.0,767.1 912.9,421.7 777.4,91.2 752.0,13.3 748.1,1.0 407.8,1.0 363.7,168.8 175.0,256.4 320.6,619.0 339.1,689.8 427.8,968.4 389.2,1023.8 192.3,1234.1 130.1,1322.5 85.2,1425.7 71.9,1491.5 88.9,1573.0 183.2,1790.2 215.9,1865.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[193.0,242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0909482906424,42.31826751958455]}},{"type":"Feature","properties":{"resourceCoords":[937.0,418.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08982514497391,42.31718078844455]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0066","type":"ImageService3","width":1455,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"628.5,74.2 792.9,86.5 1151.0,106.6 1301.3,117.5 1306.5,171.2 1300.0,352.6 1292.3,850.8 1293.5,922.7 1284.3,1368.7 1276.7,1451.5 1392.2,1801.6 1006.0,1957.0 886.0,2009.8 747.1,2036.5 646.1,2036.6 434.9,1995.4 62.4,1935.2 89.1,1913.2 166.9,861.0 291.1,307.0 341.1,172.3 392.9,106.3 443.7,69.9 628.5,74.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[165.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09639289024787,42.31426452699211]}},{"type":"Feature","properties":{"resourceCoords":[1282.0,868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09559337841239,42.31626430136079]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p67","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0067","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"403.9,1801.2 248.9,1833.5 184.3,1468.5 203.8,1387.2 277.1,944.8 286.3,873.0 365.6,378.4 398.2,198.8 400.7,144.6 603.0,182.0 853.5,238.7 1205.7,307.6 1208.2,308.2 1132.0,1902.5 1072.9,1833.5 983.5,1764.1 922.6,1734.7 839.0,1731.0 603.9,1768.9 403.9,1801.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[603.0,182.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096799,42.317326]}},{"type":"Feature","properties":{"resourceCoords":[839.0,1731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.093183,42.316543]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0068","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"111.2,1684.0 96.2,94.4 125.5,99.0 570.4,160.8 701.9,179.3 1161.1,256.7 1377.4,289.3 1346.2,526.5 1354.3,604.5 1427.3,857.0 1433.2,963.9 1408.7,1081.3 1354.4,1296.5 1288.8,1393.5 1127.8,1560.9 1094.7,1609.8 1069.3,1713.4 1084.5,1873.1 701.4,1944.4 628.6,1948.7 338.8,1980.7 291.9,1931.8 123.5,1696.8 111.2,1684.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09621934066156,42.318134088309804]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0945558904131,42.32045433656983]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0900957216266,42.31868131267167]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09175917187505,42.31636106441165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p69","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0069","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"297.0,1822.9 236.2,1674.5 230.5,1567.7 248.1,1511.1 354.1,1303.2 389.0,1190.8 378.8,968.8 368.3,849.1 331.7,748.5 188.6,528.4 158.2,456.1 119.4,219.8 403.7,198.7 670.0,192.0 967.4,186.3 1067.0,186.8 1065.3,391.2 1070.1,636.4 1041.0,860.0 968.5,1229.0 889.7,1615.5 908.5,1703.1 729.5,1965.6 714.1,2051.0 403.4,2002.1 297.0,1822.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1041.0,860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091373,42.320423]}},{"type":"Feature","properties":{"resourceCoords":[670.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.093146,42.3208]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0007","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"293.8,1846.5 238.0,1674.0 209.7,1561.8 201.8,1485.8 206.0,1387.0 251.5,1231.1 309.7,1091.0 335.3,1000.1 345.5,877.5 334.6,426.9 333.2,370.8 345.7,130.7 327.2,100.2 326.1,43.4 469.8,95.7 525.0,122.6 675.2,171.9 914.9,208.0 1283.7,277.7 1250.7,447.3 1243.5,597.7 1257.0,747.1 1224.2,753.0 953.3,1081.5 1027.2,1294.8 1134.2,1534.1 1245.1,1748.1 1064.3,1879.5 1014.3,1930.7 982.7,1903.1 906.2,1795.9 298.8,1861.5 293.8,1846.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[765.0,1587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08335860100206,42.32938746801158]}},{"type":"Feature","properties":{"resourceCoords":[351.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08166084591782,42.33192724756725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p70","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0070","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"17.9,139.0 51.5,335.9 98.5,570.9 109.0,791.0 102.9,1158.5 93.8,1543.8 126.9,1624.8 1.0,1905.9 1.0,1992.8 389.5,1984.5 391.2,1983.2 317.4,1884.8 1073.2,2014.8 993.4,1839.4 889.5,1631.4 977.6,1652.6 1133.8,1985.8 1224.0,1870.1 1256.3,1727.3 1332.7,1746.6 1459.0,1456.8 1459.0,887.4 529.3,55.0 437.9,70.1 402.5,76.0 315.9,89.2 230.6,107.3 17.9,139.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[109.0,791.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091373,42.320423]}},{"type":"Feature","properties":{"resourceCoords":[109.0,1597.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.090238,42.319213]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0071__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p71 [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":"5868.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0071__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0071","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"538.5,1876.8 550.5,1746.5 1466.0,1139.2 1466.0,774.0 1425.5,722.6 1420.8,722.6 1366.3,458.6 1325.2,302.1 1282.0,103.3 1254.5,109.8 1180.0,1.0 1081.3,1.0 639.3,425.6 643.4,617.0 595.8,644.9 378.3,677.1 150.4,723.6 193.7,893.7 202.6,1024.9 179.8,1303.5 168.7,1540.4 130.1,1935.8 434.8,1963.0 529.4,1965.5 538.5,1876.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0071__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[198.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0914739463173,42.32300670282156]}},{"type":"Feature","properties":{"resourceCoords":[1283.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08761363651394,42.3233434710189]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0072","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1080.6,1767.6 667.2,1816.5 594.9,1822.5 531.0,1846.5 527.6,1805.0 491.4,1745.9 185.5,1449.2 79.2,1373.0 129.1,1321.5 386.4,1192.5 481.4,1095.9 576.2,965.7 619.3,887.4 627.0,804.6 579.2,641.1 528.9,573.2 468.8,514.7 653.5,301.1 673.5,267.4 1010.2,395.2 1048.3,414.9 1145.5,370.8 1197.3,364.9 1309.9,369.7 1311.9,605.9 1295.3,1001.2 1288.4,1355.7 1281.7,1514.6 1282.3,1747.2 1080.6,1767.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1286.0,996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0926366356649,42.32221741634283]}},{"type":"Feature","properties":{"resourceCoords":[669.0,260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09247952899247,42.3239431461925]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0073","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.7,142.3 234.1,118.0 271.1,153.0 330.8,176.8 406.6,179.3 613.0,168.7 704.4,159.9 853.3,135.6 996.7,97.8 1066.5,76.0 1462.0,31.8 1462.0,57.0 1413.0,88.5 1378.2,136.8 1367.3,221.5 1381.1,848.8 1390.0,1140.6 1400.5,1365.8 1419.5,1505.5 1133.8,1707.3 864.9,1911.0 799.0,1962.7 725.0,2003.5 556.8,2028.9 475.9,2010.3 404.1,1957.1 287.9,1846.0 204.9,1739.0 111.5,1467.1 67.2,1410.8 118.4,1342.9 176.2,1247.0 119.3,1186.1 171.1,211.3 202.3,150.2 208.7,142.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[695.0,166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0969412477051,42.32547032446359]}},{"type":"Feature","properties":{"resourceCoords":[858.0,1899.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09329449608542,42.32386460953961]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1373.4,1293.6 1411.7,1323.1 1330.2,1426.8 1248.5,1542.0 1192.5,1635.2 1070.1,1831.5 1041.4,1880.3 955.5,1833.1 938.5,1815.5 890.5,1787.5 855.6,1778.3 364.8,1509.1 384.6,1666.7 399.6,1766.0 360.4,1762.1 349.2,1664.6 345.2,1577.8 337.3,1510.2 161.1,1507.7 157.1,1416.8 157.0,1416.1 127.0,917.6 141.8,918.4 230.4,922.0 254.8,929.1 252.9,881.3 241.9,802.9 218.6,669.4 211.2,618.4 207.1,587.9 239.1,524.5 238.9,490.3 380.0,315.7 380.1,315.9 398.4,344.9 804.7,615.7 845.4,606.8 871.9,656.1 888.1,695.5 906.1,758.3 934.1,969.4 930.0,1003.8 918.5,1021.1 951.0,1031.5 981.2,1051.5 1158.4,1160.5 1243.8,1215.0 1373.4,1293.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[283.0,931.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09843937924578,42.32259660295737]}},{"type":"Feature","properties":{"resourceCoords":[149.0,1528.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09936847648375,42.320501059854436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074A/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p74A","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074A/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074A","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1190.4,1959.3 1171.5,1960.0 722.8,1977.4 690.6,1978.1 334.6,1990.5 79.7,1991.7 85.7,1896.9 120.5,1643.4 133.7,1444.6 159.5,1181.1 145.5,831.8 102.3,90.6 227.2,103.1 310.4,124.0 371.2,157.2 445.1,213.6 472.4,269.9 606.2,227.1 811.4,104.0 869.9,63.0 1056.2,364.5 950.1,451.1 807.2,551.9 654.0,676.3 689.7,747.2 841.9,614.2 1087.8,409.9 1162.2,1533.9 1184.4,1602.8 1188.9,1714.6 1177.4,1762.5 1190.4,1959.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0074A/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[148.0,825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09892351820471,42.31871016644123]}},{"type":"Feature","properties":{"resourceCoords":[148.0,1622.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09740261119565,42.317830444285434]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p75","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0075","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1307.9,1825.2 1213.5,1839.9 790.2,1844.7 759.5,1845.2 219.6,1843.8 179.7,1847.5 137.9,1859.1 113.9,1871.5 123.2,1927.6 104.0,1913.0 94.4,1556.1 47.6,1280.9 68.8,631.5 154.5,157.2 270.0,225.5 530.5,166.2 929.9,248.1 1166.2,102.3 1252.4,145.4 1303.1,105.9 1357.0,279.6 1365.2,474.6 1397.8,516.4 1361.0,573.8 1427.8,659.5 1383.3,648.6 1317.4,1574.8 1341.8,1575.4 1326.0,1821.4 1307.9,1825.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[514.0,1324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1067672,42.3409785]}},{"type":"Feature","properties":{"resourceCoords":[782.0,483.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.103252,42.3427571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0076","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1240.0,1001.1 1228.5,1003.1 1217.6,1005.1 857.5,1883.0 853.0,1893.8 766.5,2096.0 769.3,2081.7 780.9,2039.3 788.4,2015.5 788.5,1996.0 759.2,1994.7 669.9,1981.0 388.7,1979.3 342.6,1980.0 140.3,1977.9 110.1,1977.7 94.2,1714.5 102.9,1714.0 105.2,1252.0 112.8,1250.2 118.8,1005.4 94.5,1005.7 123.6,83.9 168.3,93.0 185.8,113.8 277.6,115.0 306.0,120.2 335.1,144.9 903.0,142.1 1092.7,104.7 1134.5,69.5 1142.1,69.8 1226.6,68.5 1246.5,156.5 1259.8,259.2 1267.2,363.1 1269.6,447.8 1308.9,471.8 1340.3,502.5 1395.9,534.3 1327.5,697.0 1339.5,789.9 1324.8,822.4 1359.3,849.9 1386.2,970.9 1297.6,990.6 1240.0,1001.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1352.0,835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0992513302595,42.336064705691776]}},{"type":"Feature","properties":{"resourceCoords":[1013.0,1498.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10258838809627,42.33503178843152]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1358.5,2011.9 1326.2,2078.8 1125.1,1993.9 1086.0,2060.7 1068.5,2033.0 127.7,1833.3 62.4,1647.7 117.7,1286.2 87.2,538.3 80.7,523.4 47.6,391.2 30.6,279.8 78.5,255.9 161.8,234.0 240.9,227.9 1311.1,245.5 1371.9,245.4 1350.0,779.6 1340.1,960.0 1335.5,1596.7 1364.2,1675.1 1359.6,1948.3 1358.5,2011.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10831832729852,42.33953230731313]}},{"type":"Feature","properties":{"resourceCoords":[1339.0,925.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10832299750437,42.33796845942682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077A/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p77A","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077A/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077A","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.2,1945.4 232.8,1667.2 199.6,1589.0 171.3,941.0 171.9,757.0 166.7,212.5 1020.2,171.3 1209.7,134.6 1230.5,129.4 1223.4,1068.5 1205.7,1069.4 1236.5,1604.5 1224.0,1604.5 1218.9,1962.8 242.2,1945.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0077A/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[185.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10830252663024,42.33794069694959]}},{"type":"Feature","properties":{"resourceCoords":[796.0,1595.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10823474216106,42.33632235368407]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p78 [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":"6108.0"},{"label":"split_canvas_w","value":"5916.0"},{"label":"split_canvas_h","value":"2280.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078","type":"ImageService3","width":1479,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.8,1735.8 115.7,1782.7 113.5,2092.2 391.3,2092.0 388.7,1985.0 687.7,1986.3 894.5,2076.8 1253.1,2066.7 1278.3,2096.0 1297.8,1977.3 1308.5,1896.8 1346.2,1613.0 1312.8,1612.9 349.2,1606.2 352.0,1670.0 323.8,1739.1 116.9,1666.4 81.8,1735.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[336.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11003340740953,42.33630191081811]}},{"type":"Feature","properties":{"resourceCoords":[336.0,1616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10982659440077,42.3364798832375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p78 [2]","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":"5916.0"},{"label":"split_canvas_h","value":"6108.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078","type":"ImageService3","width":1479,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1354.3,804.6 1361.7,778.1 1368.8,749.2 1410.6,570.7 1428.7,455.8 1425.8,401.9 1440.2,327.2 1463.2,241.2 1472.7,210.4 1469.0,210.0 1469.0,194.0 1478.0,192.9 1478.0,153.4 1418.7,150.9 1237.5,124.2 667.6,124.2 574.1,125.9 164.0,124.1 90.3,124.1 88.2,481.4 122.0,481.6 83.1,768.5 72.1,849.9 55.9,969.7 52.1,969.7 76.2,997.9 54.1,1487.5 515.6,1523.7 517.6,1526.0 641.9,1526.0 675.5,1526.0 1156.0,1119.3 1235.8,1037.1 1313.9,912.7 1354.3,804.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0078__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[845.0,483.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10665003904573,42.33447085657554]}},{"type":"Feature","properties":{"resourceCoords":[845.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10609873471847,42.33494762375548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p79","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0079","type":"ImageService3","width":1477,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.1,1986.3 153.8,1961.2 184.1,1965.2 568.0,1834.0 852.0,1743.3 1287.1,1621.2 1446.5,1571.5 1297.8,1069.2 1094.6,398.1 1045.0,279.1 1010.3,157.2 1006.2,117.0 1006.9,1.0 950.6,1.0 830.4,31.4 715.4,55.9 703.9,58.3 692.5,60.7 670.7,65.3 1.0,1845.1 1.0,2002.7 52.1,1986.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[615.0,980.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1018622,42.3347576]}},{"type":"Feature","properties":{"resourceCoords":[568.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.103327,42.333676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0008","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1120.7,1401.5 925.5,1866.1 716.0,1749.0 495.9,1608.6 317.5,1471.8 362.8,1050.2 386.8,1027.2 293.6,910.4 217.2,781.4 151.6,622.3 708.0,391.8 960.9,279.1 1287.5,466.7 1361.6,505.3 1466.0,710.9 1466.0,919.8 1412.8,877.5 1235.2,911.3 1185.3,1142.5 1120.7,1401.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[712.0,394.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07944254369568,42.32966605059437]}},{"type":"Feature","properties":{"resourceCoords":[577.0,42.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0787057346568,42.33006453983647]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p80 [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":"5856.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.3,699.0 54.0,992.0 84.4,1362.8 122.1,1890.0 133.5,1998.8 399.5,1991.4 462.4,1978.5 574.2,1943.0 792.2,1871.2 994.8,1818.5 1134.9,1799.4 1220.8,1800.3 1366.8,1819.8 1377.2,1821.8 1426.7,393.1 1344.5,390.3 1207.0,380.7 788.4,329.0 742.9,29.1 738.6,1.0 709.5,1.0 705.4,1.3 628.7,28.4 558.0,81.4 510.1,165.8 464.5,266.5 414.1,342.6 410.9,326.9 13.9,457.6 14.9,470.9 35.3,699.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1089.0,1786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09881577173407,42.329693036025276]}},{"type":"Feature","properties":{"resourceCoords":[1208.0,382.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10173296418829,42.330984816110906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p80 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.34"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3687.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2168.4"},{"label":"split_canvas_h","value":"1397.2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"982.9,53.6 986.4,60.0 1092.3,176.8 1105.7,186.1 1397.0,308.9 1406.9,311.7 1426.0,301.2 1441.5,284.2 1439.1,84.8 1438.4,68.5 1434.8,62.1 1395.3,50.6 995.5,46.5 982.9,53.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0080__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[921.9,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10234710159538,42.33041603535431]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10169109805342,42.33129888089893]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,349.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10092891947697,42.33098498519538]}},{"type":"Feature","properties":{"resourceCoords":[921.9,349.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10158492301893,42.33010213965076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p81","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0081","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"192.6,800.5 190.1,1031.7 189.2,1575.9 182.3,1809.5 390.9,1826.7 573.6,1846.7 822.5,1854.5 1127.3,1828.0 1376.1,1781.4 1359.5,1613.1 1327.7,1156.3 1296.0,856.0 1244.7,448.2 1254.8,419.0 1250.8,312.9 1243.4,244.2 1268.4,262.6 1398.2,289.5 1004.1,32.1 961.0,15.4 907.4,8.6 871.2,1.0 868.5,1.0 984.0,57.0 1000.5,66.3 1041.5,94.3 1072.3,115.1 1087.2,126.6 1150.7,173.8 1156.8,200.8 1068.1,246.6 902.3,265.3 772.2,289.9 697.9,304.0 195.1,393.6 194.3,507.6 192.6,800.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[190.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1039085,42.3316659]}},{"type":"Feature","properties":{"resourceCoords":[1296.0,856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.103327,42.333676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p82 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"3798.0"},{"label":"split_canvas_w","value":"2337.6"},{"label":"split_canvas_h","value":"4590.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"422.1,1012.5 359.2,1071.5 285.7,1160.7 114.2,1394.2 79.4,1439.2 98.0,1455.7 118.0,1483.2 129.6,1517.8 132.6,1531.7 189.4,1924.3 218.6,1919.7 274.8,1910.8 359.8,1902.8 462.1,1913.3 501.0,1921.2 523.5,1415.6 530.5,1209.5 548.1,1052.7 523.4,949.5 495.9,949.5 422.1,1012.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[486.3,1921.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10563869701085,42.33241404911773]}},{"type":"Feature","properties":{"resourceCoords":[192.1,1921.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10631433177818,42.332571980212556]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p82 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5872.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"651.5,1852.7 771.1,1852.4 1164.9,1860.0 1315.5,1865.9 1401.2,1538.1 1374.5,1538.4 1330.0,1179.0 1322.3,1179.4 1298.0,715.0 1282.1,588.5 999.4,532.5 889.4,510.6 748.8,496.8 580.5,523.3 512.2,135.5 496.2,87.8 456.6,45.4 380.8,130.3 264.6,216.9 161.8,264.2 196.7,309.9 298.2,875.5 363.4,881.0 625.9,876.9 620.4,952.0 640.1,1177.4 636.7,1177.6 641.8,1492.6 580.4,1518.6 580.5,1544.3 644.2,1539.3 651.5,1852.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0082__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,503.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10563866652141,42.33242927954785]}},{"type":"Feature","properties":{"resourceCoords":[632.0,1181.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10673346266644,42.33142312473427]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0083","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"126.3,1268.5 126.3,1245.7 132.1,877.0 125.3,633.0 121.2,337.4 172.1,277.5 415.7,251.2 414.2,147.6 535.9,248.6 1166.3,242.9 1185.1,298.1 1100.5,875.0 1161.4,901.3 1415.4,982.0 1385.8,1052.5 1332.2,1275.8 1328.8,1274.8 1232.2,1579.5 1164.7,1584.8 1156.6,1609.6 1219.5,1625.3 1125.5,1929.1 1121.5,1927.8 1108.0,1923.5 813.5,1823.2 644.2,1761.7 552.8,1740.0 423.2,1689.5 233.4,1624.8 168.2,1589.6 145.5,1550.9 135.9,1495.7 134.4,1482.1 68.7,1476.0 126.3,1268.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[573.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1085274175209,42.33151172701855]}},{"type":"Feature","properties":{"resourceCoords":[637.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1083677884832,42.33185157947857]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0084__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p84 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5650.0"},{"label":"split_canvas_w","value":"5860.0"},{"label":"split_canvas_h","value":"2738.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0084__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0084","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1379.3,2072.7 1421.2,2096.0 1439.9,2096.0 1246.7,1949.6 1181.4,1836.5 1315.2,1588.1 1239.0,1485.2 1081.8,1447.9 751.0,1573.3 412.1,1580.0 360.1,1587.9 161.4,1718.8 204.7,1754.0 230.8,1771.7 271.2,1797.5 478.9,1903.2 707.5,1924.1 774.2,1930.8 806.6,1934.5 841.6,1938.2 880.1,1943.2 938.5,1952.9 1002.8,1965.6 1070.5,1979.8 1119.7,1990.9 1164.2,2001.0 1194.2,2008.7 1248.4,2022.2 1302.5,2039.5 1379.3,2072.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0084__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1412.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11345600434854,42.33212776808253]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,1412.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11101355629884,42.33406719702283]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10979542417262,42.33321701737662]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11223787222231,42.331277588436315]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0085","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1375.2,398.2 1376.7,640.5 1363.0,1006.1 1362.5,1028.8 1066.8,2010.5 1066.3,1980.8 748.2,2023.8 650.9,1886.8 272.5,1899.0 114.3,1799.4 157.9,1065.8 91.8,800.4 102.3,741.9 269.2,706.2 376.8,667.5 429.0,659.5 523.2,583.4 684.7,439.1 737.1,394.6 815.4,333.6 1008.0,200.9 1082.2,153.7 1132.7,126.0 1238.2,83.2 1305.7,67.7 1377.5,104.8 1375.2,398.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[361.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11201806711797,42.331982307850275]}},{"type":"Feature","properties":{"resourceCoords":[-64.0,837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1130409984406,42.3317892555974]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0086__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p86 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5856.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0086__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0086","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.3,1053.1 98.7,1219.3 152.4,1440.0 332.4,1488.9 929.5,1961.4 1126.5,1960.2 1318.0,1656.5 1368.9,1544.8 1430.5,1355.5 1289.0,1298.7 1348.9,344.3 1049.3,272.7 876.6,227.8 784.4,214.8 652.0,177.1 458.9,130.9 391.3,102.3 365.4,66.4 351.1,13.1 348.5,1.0 282.8,1.0 137.8,792.0 172.3,1053.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0086__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":[-71.11042161055033,42.331154886104265]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1069062037179,42.33087773713085]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1074394212027,42.32712887738881]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11095482803512,42.327406026362226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0087","type":"ImageService3","width":1478,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"456.2,1858.5 418.4,1741.0 393.3,1664.1 307.4,1382.7 267.8,1206.4 249.7,1072.8 230.7,868.8 226.6,726.6 235.0,590.1 245.8,476.0 261.7,324.5 1198.2,117.0 1199.0,130.5 1205.4,254.4 1218.7,699.7 1217.7,936.2 1222.9,1161.2 1222.8,1583.9 1223.0,1604.1 1226.0,1839.8 1226.8,1879.7 466.0,1886.0 459.9,1868.2 456.2,1858.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[176.0,472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10740371265915,42.32834759633313]}},{"type":"Feature","properties":{"resourceCoords":[338.0,1873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10411025949963,42.327672459781844]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p88","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0088","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1019.7,997.7 1043.3,1075.6 1093.0,1148.7 1175.0,1200.5 1273.5,1250.7 1347.2,1304.7 1331.3,1307.0 1443.5,1709.8 1287.4,1714.5 1203.3,1717.8 946.4,1727.0 814.1,1728.1 522.0,1736.7 296.2,1747.1 159.4,1749.7 221.9,1414.4 195.2,1416.7 124.7,1059.2 117.0,1060.0 59.3,595.5 34.2,469.7 261.2,499.2 796.2,563.7 1025.1,597.9 1066.4,394.7 1107.5,217.5 1279.7,225.7 1448.7,246.9 1438.1,377.3 1422.1,514.2 1351.0,930.0 1049.3,961.5 1019.4,978.4 1019.7,997.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[117.0,1060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1051501,42.3310158]}},{"type":"Feature","properties":{"resourceCoords":[1351.0,930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.102293,42.330354]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0089","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"310.8,136.9 456.4,109.8 466.5,137.2 1230.3,123.1 1231.6,167.2 1234.4,336.7 1241.3,565.5 1242.5,859.2 1250.9,1231.2 1257.3,1759.8 1262.3,1869.1 1079.5,1897.0 747.3,1955.0 677.5,1977.5 548.1,1996.5 502.7,1988.9 385.2,1937.7 304.0,1891.4 306.2,1821.9 337.7,1812.7 449.8,976.0 205.6,149.8 310.8,136.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1250.0,547.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10232312101282,42.32888408882521]}},{"type":"Feature","properties":{"resourceCoords":[1250.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09934841879166,42.32796519572768]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p9","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0009","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"329.8,799.5 371.1,560.9 423.6,411.9 451.6,357.4 507.0,215.0 450.2,214.8 678.9,83.0 1209.3,90.3 1268.7,149.0 1299.6,1954.8 722.6,1859.4 527.0,1832.6 316.4,1937.7 74.0,2030.0 125.2,1757.0 252.2,1166.3 329.8,799.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[507.0,215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0816905,42.3319694]}},{"type":"Feature","properties":{"resourceCoords":[74.0,2030.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079016,42.32929]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0090","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"295.3,182.5 648.2,128.3 649.0,240.2 663.9,361.8 893.2,339.2 1171.4,320.3 1298.6,319.1 1394.0,340.7 1266.5,1195.5 810.6,1909.0 778.1,1904.0 762.0,1830.6 777.1,1495.5 283.7,1465.5 278.9,1433.4 222.2,1061.8 222.0,1051.8 223.0,1040.7 226.4,1031.2 232.6,1019.6 51.4,224.5 106.5,215.0 295.3,182.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[756.0,1077.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10234839771125,42.32635608054493]}},{"type":"Feature","properties":{"resourceCoords":[73.0,224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1043337664526,42.325082067259906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p91","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0091","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"272.9,1613.0 298.6,1722.3 340.0,1838.0 559.4,1765.2 827.4,1685.1 951.6,1655.8 1049.8,1655.8 1156.0,1665.5 1305.0,1669.8 1282.3,1464.5 1254.5,1168.5 1251.2,985.9 1260.5,849.9 1283.2,644.1 1308.0,502.5 1378.0,258.4 1182.0,211.4 1065.2,169.2 743.8,1.0 743.5,1.0 746.1,31.8 553.7,330.4 470.2,632.2 361.8,799.2 346.5,803.3 297.9,904.9 243.6,1121.3 228.8,1219.3 228.8,1308.0 245.1,1465.4 272.9,1613.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[234.0,1369.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.105211,42.3261083]}},{"type":"Feature","properties":{"resourceCoords":[838.0,551.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1068766,42.3274249]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.48"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0092","type":"ImageService3","width":1484,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1070.2,1803.5 922.7,1824.5 804.5,1849.4 475.8,1955.0 468.4,1915.2 318.1,1178.2 314.3,1162.3 309.3,1146.5 163.2,782.9 882.7,455.2 894.9,458.8 924.8,456.7 1296.1,319.3 1300.7,349.2 1320.8,424.5 1070.2,1803.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[928.0,1808.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10287257570114,42.32295938994621]}},{"type":"Feature","properties":{"resourceCoords":[463.0,1955.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10407047722985,42.32283231901026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0093","type":"ImageService3","width":1477,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"420.8,1731.0 414.9,1220.8 388.2,1171.3 370.1,1121.2 211.2,663.5 520.1,550.8 580.5,508.6 648.6,513.5 655.5,520.4 738.6,483.0 1006.7,402.3 1008.0,435.1 1023.6,813.9 1025.5,942.6 1042.3,953.9 1070.3,1707.2 420.8,1731.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[662.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10016498531616,42.326421981367105]}},{"type":"Feature","properties":{"resourceCoords":[1030.0,958.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09971151797001,42.32540540907695]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.70"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0094","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1060.2,1052.2 883.9,1471.9 903.5,1538.5 876.8,1680.0 894.7,1720.3 201.2,1785.8 155.8,1027.3 138.4,1016.1 133.5,884.8 108.8,498.5 107.5,476.8 640.1,289.8 926.9,201.3 1203.5,111.7 1206.6,173.6 1210.8,259.1 1211.5,409.5 1197.5,561.9 1182.9,654.0 1140.9,859.3 1119.2,933.1 1080.6,985.7 1036.8,1013.2 1054.3,1044.3 1060.2,1052.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[160.0,1003.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09964880123755,42.32544200617344]}},{"type":"Feature","properties":{"resourceCoords":[1070.0,1052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09765916590166,42.32476454076375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p95","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.52"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0095","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"475.1,1348.1 379.1,927.9 366.6,877.4 355.0,831.8 301.0,620.0 251.4,425.4 178.0,174.0 173.8,160.8 1081.6,169.3 1091.8,819.9 1101.5,819.7 1135.9,1501.8 1119.2,1508.4 1024.2,1546.5 777.1,1654.1 630.7,1712.3 539.3,1738.3 541.6,1687.8 506.9,1514.9 475.1,1348.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[301.0,620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.101357,42.3228699]}},{"type":"Feature","properties":{"resourceCoords":[178.0,174.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1024889,42.3229244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0096","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"170.6,254.3 177.6,223.8 261.1,218.6 548.1,291.5 667.7,412.9 1103.6,597.1 1183.2,573.2 1138.0,676.0 1090.8,893.1 1079.2,991.3 1082.1,1079.5 1103.3,1235.8 1135.8,1381.8 808.0,1523.1 633.6,1602.0 546.5,1641.3 322.6,1745.2 183.2,1436.4 181.2,1382.7 259.1,582.7 246.4,526.4 203.2,485.2 125.7,449.4 170.6,254.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0096/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[210.0,1437.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10496395204181,42.324467134414306]}},{"type":"Feature","properties":{"resourceCoords":[1080.0,1140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10521601800542,42.32609236448351]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p97","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0097","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1336.2,286.7 1374.1,331.7 1380.6,388.3 1218.8,1164.7 1215.1,1217.7 1318.9,1535.4 1209.0,1572.6 1176.2,1579.7 378.1,1694.6 287.6,1355.4 122.4,682.6 730.0,532.0 733.7,560.3 1162.6,345.6 1217.0,280.1 1264.0,243.3 1336.2,286.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[730.0,532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1067678,42.3236823]}},{"type":"Feature","properties":{"resourceCoords":[194.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1058347,42.3226364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1919 | sanborn03693_025 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:18:49Z","modified":"2026-10-24T15:18:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0098","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"357.8,1420.8 240.0,1179.2 186.1,1054.1 135.0,899.8 99.8,725.7 53.0,602.4 8.5,545.7 20.6,514.3 175.1,390.4 234.6,384.2 315.6,357.5 794.4,403.6 782.4,429.6 1378.7,625.3 1285.0,903.3 1169.5,1221.8 1130.4,1375.5 1083.5,1717.9 1059.8,1930.8 1035.1,2001.3 1034.4,2008.8 1034.5,2010.2 1035.5,2023.0 1038.1,2077.3 994.4,2096.0 460.1,2096.0 421.2,1568.5 440.2,1539.2 357.8,1420.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693191903:03693_03_1919-0098/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1117.0,1331.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10838224485882,42.322430812305626]}},{"type":"Feature","properties":{"resourceCoords":[156.0,1016.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10871795628299,42.324232861044884]}}]}}]}