{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03693_014.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boston, Massachusetts | 1898 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"121"},{"label":"placed","value":"111"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef-snap 75, georef 30, snap:0 3, georef-street 2, streets-candidate 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.27326,-71.12458 +/-258m); p109 (tier 2, 42.28048,-71.17426 +/-260m); p110 (tier 2, 42.28008,-71.17143 +/-253m); p117 (tier 1, 42.25793,-71.15945 +/-254m); p118 (tier 1, 42.25682,-71.15803 +/-252m); p27 (tier 1, 42.31953,-71.12439 +/-249m); p40__2 (tier 1, 42.27081,-71.17145 +/-150m); p50 (tier 1, 42.29571,-71.12007 +/-236m); p52__2 (tier 1, 42.28842,-71.10856 +/-100m); p95__2 (tier 1, 42.29433,-71.14835 +/-169m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p1","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0001","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1262.0,1994.4 1165.8,1783.4 1098.4,1717.0 917.1,1710.6 644.1,1825.5 398.1,1739.4 -0.0,1699.0 -0.0,-0.0 1473.0,0.0 1473.0,375.9 1473.0,1982.4 1262.0,1994.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11138,42.3198698]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1080395,42.3186569]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1103746,42.3151402]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1137151,42.3163531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0010","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.3,1561.7 -0.0,1561.7 -0.0,-0.0 1255.9,0.0 1219.9,556.5 1153.4,545.7 1097.5,1910.5 100.7,1890.7 67.3,1561.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11548018489508,42.31883544679054]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1121694013236,42.31780875631852]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11413756780769,42.3142894119834]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11744835137917,42.31531610245542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0100","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"612.0,1149.6 85.8,1153.6 85.2,951.5 430.0,942.9 417.9,287.5 766.4,279.4 765.2,0.0 1103.4,0.0 1112.0,537.8 1466.0,546.0 1466.0,2066.5 1451.2,2097.0 620.9,2097.0 616.2,2078.1 566.0,2078.5 565.7,2097.0 290.5,2097.0 286.5,2080.8 -0.0,2083.2 -0.0,1516.2 95.6,1517.4 88.3,1326.8 527.8,1314.7 622.5,1264.7 612.0,1149.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15484491530843,42.27963927574845]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15022079182046,42.28358071106314]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14265409770807,42.27865230402011]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14727822119605,42.27471086870543]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p101","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0101","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"945.2,973.5 942.8,1174.3 1466.0,1174.6 1466.0,1297.2 1379.8,1338.0 1209.8,1341.2 1209.7,1219.7 -0.0,1229.7 -0.0,0.0 1274.9,0.0 1288.2,967.8 945.2,973.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[770.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.149605,42.2758357]}},{"type":"Feature","properties":{"resourceCoords":[1287.0,391.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.152213,42.279917]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p102","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0102","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1197.3,315.0 1102.0,317.1 1100.3,417.5 1315.2,681.0 1381.6,879.7 1253.5,878.7 1254.2,1570.9 1247.1,1591.6 1243.6,1989.1 1304.1,1990.0 1302.4,2097.0 -0.0,2097.0 -0.0,0.0 1461.0,0.0 1461.0,122.0 1193.2,124.8 1197.3,315.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0102/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15394095541035,42.27378282917737]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.149406043308,42.2777801590288]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1417064866138,42.27292984822733]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14624139871614,42.2689325183759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p103","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0103","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 183.9,-0.0 196.4,128.6 392.2,159.3 425.8,-0.0 700.6,-0.0 879.9,26.4 881.9,-0.0 1298.0,-0.0 1297.8,262.3 1197.2,1530.0 1013.0,1516.2 1004.8,1616.2 1046.8,1618.8 1049.0,1898.2 1363.2,2020.9 1460.0,2081.9 1460.0,2097.0 -0.0,2097.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0103/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16750929463966,42.29285941415802]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16252253014088,42.28916954078868]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1696364314285,42.28383356763518]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.17462319592728,42.287523441004524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0104","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1467.0,0.0 1467.0,945.9 1336.9,950.5 1328.1,1265.0 1266.8,1269.2 1248.7,1768.8 803.2,1761.4 828.3,1672.8 402.0,1700.4 414.9,1899.5 110.1,1898.8 106.1,1356.5 -0.0,1348.8 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16932229139229,42.28547642478792]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16400287459858,42.288943136054336]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15735153057312,42.2832780186601]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16267094736683,42.279811307393686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p105","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0105","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,49.3 7.4,0.0 445.8,0.0 438.6,168.8 1318.4,210.2 1296.8,600.6 1466.0,603.3 1466.0,1141.9 1224.1,1140.3 1220.3,1754.2 1466.0,1698.0 1466.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,1034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.160848,42.27992]}},{"type":"Feature","properties":{"resourceCoords":[1228.0,1034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1600743,42.2804708]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0106","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.0,1951.7 163.3,1340.4 404.2,1347.0 411.6,810.5 243.2,804.4 270.1,416.0 -0.0,397.2 0.0,0.0 850.7,0.0 789.4,173.0 1261.1,207.9 1217.7,860.5 1460.0,893.8 1460.0,1292.6 1159.5,1447.4 1172.5,1540.0 1460.0,1559.1 1460.0,2097.0 393.8,2097.0 396.6,1900.8 151.0,1951.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0106/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16247111588581,42.28183266585764]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15996898128074,42.28368990157157]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15638871600385,42.28101225262279]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15889085060891,42.27915501690886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p107","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0107","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"900.0,507.0 915.5,505.7 990.0,349.7 1072.2,68.9 1358.5,43.3 1358.0,0.0 1461.0,0.0 1461.0,190.1 1259.0,192.4 1265.2,1581.0 1374.4,1587.7 1379.8,2058.9 1154.5,2071.4 1154.2,2097.0 59.0,2097.0 -0.0,2034.8 -0.0,1098.8 22.8,1083.5 27.5,1054.8 -0.0,982.4 -0.0,0.0 862.1,0.0 900.0,507.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0107/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1743948,42.283128]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1691931,42.2864412]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1627653,42.2809175]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.167967,42.2776043]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0011","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"649.1,2092.5 310.8,1381.3 -0.0,1387.9 0.0,0.0 484.6,75.7 740.7,170.4 1030.1,55.5 1261.4,90.8 1385.1,358.7 1470.0,355.6 1470.0,1762.3 1349.0,1803.4 1354.4,2039.8 649.1,2092.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11339288343537,42.317113547512875]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11019046668272,42.316003879760515]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11231619353468,42.312601948396214]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11551861028732,42.313711616148574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p111","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0111/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0111","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1463.0,1546.6 1445.0,1575.2 1463.0,1850.8 1351.9,1878.8 1353.5,2097.0 1174.0,2097.0 577.2,1758.5 558.4,1800.1 640.1,2097.0 154.4,2097.0 225.6,1825.7 152.4,1971.9 122.6,2097.0 0.0,2097.0 0.0,1727.8 107.9,1513.1 0.0,1460.3 -0.0,-0.0 1463.0,0.0 1463.0,1546.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0111/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[578.0,1757.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1685283,42.2747829]}},{"type":"Feature","properties":{"resourceCoords":[1001.0,1985.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1669632,42.2759236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p112","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0112","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,1136.5 138.6,83.1 169.8,85.9 419.4,232.1 859.1,607.2 1461.0,1273.0 1461.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0112/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16743345358383,42.27629434363952]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16236877249791,42.27262338238882]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16943951016125,42.26720632285332]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.17450419124717,42.27087728410402]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p113","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0113/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0113","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"446.9,514.0 467.2,549.1 507.4,471.8 661.6,342.0 676.3,304.4 949.0,389.1 1103.5,341.9 1049.3,141.6 1271.3,0.0 1368.0,0.0 1458.0,28.4 1458.0,2097.0 673.4,2097.0 797.5,2007.7 0.0,901.8 0.0,631.2 446.9,514.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0113/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1049.0,142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.166955,42.277165]}},{"type":"Feature","properties":{"resourceCoords":[294.0,1079.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1650349,42.2731257]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p114","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0114/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0114","type":"ImageService3","width":1451,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1451.0,0.0 1451.0,2097.0 985.9,2097.0 1004.1,1992.4 860.7,1814.7 713.4,1795.3 711.2,1894.9 628.7,1893.3 409.3,2097.0 -0.0,2097.0 0.0,0.0 1451.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0114/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16696266277552,42.272543120862245]}},{"type":"Feature","properties":{"resourceCoords":[1451.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15996365392593,42.2729084613643]}},{"type":"Feature","properties":{"resourceCoords":[1451.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15925514411533,42.265370558586284]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16625415296492,42.26500521808423]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p115","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0115/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0115","type":"ImageService3","width":1456,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"700.5,0.0 760.6,58.0 816.8,0.0 845.4,0.0 918.3,75.3 913.3,323.6 825.2,397.0 1170.3,717.2 1456.0,409.3 1456.0,2097.0 605.9,2097.0 649.3,1855.5 636.0,1857.1 658.0,1807.5 -0.0,1689.3 -0.0,0.0 700.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0115/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16557833995493,42.264075378077116]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1608224738936,42.267858962101776]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15351076718991,42.26275404907775]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15826663325124,42.25897046505309]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0116/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p116","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0116/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0116","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1463.0,97.2 1463.0,2097.0 -0.0,2097.0 -0.0,-0.0 1463.0,0.0 1437.5,105.0 1463.0,97.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0116/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15994000626044,42.259823294615465]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15712694158073,42.261385022541816]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15412357403645,42.25837974338341]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15693663871616,42.25681801545706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0012","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.8,1640.1 254.8,238.4 672.7,227.2 645.5,0.0 1302.4,0.0 1436.3,441.6 1427.7,704.2 1315.2,1041.8 1086.0,1403.0 967.5,1970.3 122.0,1915.7 123.3,1667.1 242.8,1640.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0012/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11087355237744,42.31600562359899]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10764497711064,42.31491736642679]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10972965222564,42.311487586433046]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11295822749244,42.312575843605245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0013","type":"ImageService3","width":1476,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"245.4,1999.7 311.1,1424.2 505.9,1043.8 586.7,697.4 578.8,564.7 1105.5,467.4 1047.9,1195.8 1168.6,2005.9 245.4,1999.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0013/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10883598459739,42.31540714150902]}},{"type":"Feature","properties":{"resourceCoords":[1476.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10574134908475,42.31409559197738]}},{"type":"Feature","properties":{"resourceCoords":[1476.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10824352861293,42.31082143210844]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11133816412557,42.31213298164008]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0014","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"510.7,722.7 246.0,746.6 210.2,314.1 1283.2,483.7 1311.2,1028.8 941.0,1066.7 861.8,1523.8 1217.0,1541.1 1222.0,1849.9 213.8,1701.5 256.9,1149.4 512.9,1125.3 510.7,722.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10843717148546,42.313094699939775]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10693610163705,42.315510473806384]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10229581392053,42.31391150058227]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10379688376895,42.31149572671566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0015","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1184.4,709.3 1140.0,1883.5 397.7,1839.8 401.9,1518.0 310.4,1509.1 260.5,740.1 328.8,301.0 765.4,267.2 742.7,0.0 1148.9,0.0 1184.4,709.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10794819935163,42.31394001358553]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10472448641437,42.31284499231023]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1068277724278,42.30941091944576]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11005148536506,42.31050594072106]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0016","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1427.0,1693.0 267.8,1825.1 14.7,517.7 569.6,450.0 1425.2,264.2 1427.0,1693.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10492012442624,42.313408193933206]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10206083685739,42.31184715172022]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10505513336209,42.30880540933326]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10791442093094,42.310366451546244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0017","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"330.3,48.7 518.2,250.5 978.9,171.8 1039.6,566.9 1128.2,553.3 1126.7,475.1 1469.0,383.1 1469.0,1980.7 1243.6,1985.8 1174.4,1875.8 1186.0,1903.4 1319.1,2097.0 231.3,2097.0 236.2,14.9 330.3,48.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.102138651015,42.312598231228655]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09929861210885,42.31105142652732]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10226354229398,42.30803218003265]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10510358120013,42.30957898473398]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0018","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1162.3,234.6 1053.6,28.4 1154.0,9.9 1351.5,65.0 1343.0,0.0 1467.0,0.0 1467.0,2097.0 311.4,2097.0 348.4,481.0 1162.3,234.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09986586144427,42.3115467738917]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09701666745423,42.31006817254402]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09985466090173,42.307034991297776]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10270385489177,42.308513592645454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0019","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1087.5,1967.0 1468.0,2061.7 1468.0,2097.0 -0.0,2097.0 0.0,-0.0 417.9,-0.0 536.4,295.2 649.5,265.1 1194.5,1222.7 1137.5,1218.0 1087.5,1967.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11757079174217,42.31659387393922]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11487453740541,42.314956925627165]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11801459106525,42.312088764779254]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.120710845402,42.31372571309131]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p2","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0002","type":"ImageService3","width":1474,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.9,1927.6 492.4,1933.3 558.8,0.0 1474.0,0.0 1474.0,159.2 1404.4,165.1 1394.4,1696.8 1474.0,1704.6 1474.0,1968.7 1394.5,1703.7 744.1,1701.5 770.9,1927.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[560.0,1193.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1093568,42.3164991]}},{"type":"Feature","properties":{"resourceCoords":[1162.0,955.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1077803,42.3164474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0020","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1164.1,302.8 1283.5,1015.3 1171.2,1889.8 -0.0,1088.8 -0.0,9.2 1164.1,302.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11677115364317,42.31552349688261]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11326723642242,42.315084811752506]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1141081542795,42.31135998184654]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11761207150026,42.31179866697665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p21","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0021","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"109.0,2088.4 336.3,854.7 -0.0,741.5 -0.0,-0.0 365.9,0.0 389.0,386.1 424.1,383.8 495.6,0.0 1242.4,0.0 1205.8,1605.3 1232.5,1670.4 788.6,1931.9 592.0,2001.3 109.0,2088.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[619.0,1993.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1148227,42.3104567]}},{"type":"Feature","properties":{"resourceCoords":[397.0,522.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1177619,42.3119359]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0022","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.8,1951.8 196.1,1682.7 201.4,1426.4 166.4,1051.0 -0.0,997.5 -0.0,105.6 24.2,161.5 863.3,223.4 1470.0,350.7 1404.4,596.9 1265.5,554.0 1096.8,612.8 1045.6,693.9 1122.0,783.1 1210.8,1145.8 1088.0,1985.3 660.2,1853.2 185.0,1969.5 124.8,1951.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11404348300381,42.31351668848791]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11067982916188,42.31275731129028]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11213444390458,42.309183899596455]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11549809774651,42.30994327679409]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0023","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"290.1,1131.7 111.5,974.2 -0.0,939.7 -0.0,844.4 110.7,705.5 250.2,668.0 183.6,423.1 1235.0,59.5 1365.8,355.4 1466.0,316.4 1466.0,1982.2 1367.4,1719.6 720.4,2003.1 441.9,1361.0 290.1,1131.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1104235340377,42.31289614893062]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1081150471919,42.31091103208866]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1119279454512,42.30845186984984]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11423643229699,42.3104369866918]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p24","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0024","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"309.2,1835.0 297.4,1723.5 714.6,105.5 1351.3,34.1 1466.0,852.5 1466.0,1649.6 1047.5,1696.1 734.9,1845.2 625.0,1657.7 309.2,1835.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[309.0,1835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1118473,42.3084109]}},{"type":"Feature","properties":{"resourceCoords":[608.0,118.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.108919,42.31063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p25","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0025","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"509.4,2030.0 452.1,1655.2 395.1,1689.1 388.6,1243.6 221.3,146.4 1374.8,37.9 1346.5,2062.5 509.4,2030.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,86.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1056435,42.3098969]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,2062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.107464,42.306487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0026","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1470.0,2097.0 1195.3,2097.0 1199.0,1952.8 213.2,1822.7 211.2,477.6 1277.8,473.1 1470.0,750.1 1470.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10437898475563,42.31026255758914]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10148955026847,42.30867500501201]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10453040537233,42.30560522372605]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10741983985949,42.307192776303175]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p28","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0028","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.0,2097.0 -0.0,2097.0 -0.0,0.0 1469.0,0.0 1469.0,2097.0 1447.0,2097.0 1418.0,1939.7 1425.0,1714.3 1377.4,1715.2 1149.8,1816.1 911.0,1964.3 441.3,2000.5 398.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,2001.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.127432,42.311857]}},{"type":"Feature","properties":{"resourceCoords":[628.0,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1258459,42.3186635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0029","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"609.7,424.1 644.7,455.7 487.5,612.4 402.3,744.8 418.2,759.7 1133.9,0.0 1465.0,0.0 1465.0,401.4 1152.7,466.3 1261.0,987.0 1081.4,1012.0 1134.7,1375.7 473.9,1251.5 496.8,1216.2 344.8,847.8 188.6,1204.0 119.0,1277.7 -0.0,1327.0 -0.0,386.9 104.9,285.9 377.2,341.9 609.7,424.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12642563522857,42.31242114606504]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12095796734971,42.3157262253486]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11460537707401,42.30989775254246]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12007304495287,42.306592673258905]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0003","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"502.9,0.0 854.1,0.0 837.7,242.3 1204.0,67.8 1149.7,676.5 1150.8,1363.7 961.8,2097.0 432.1,2097.0 447.9,1969.8 354.1,1514.7 502.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10761144525671,42.31786678566185]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10422693809706,42.316990162362]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10590740138497,42.313392398236495]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10929190854462,42.31426902153634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p30","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0030","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.1,2097.0 152.8,2066.9 84.2,2097.0 -0.0,1983.9 -0.0,296.3 947.8,160.7 1470.0,495.6 1470.0,804.3 1263.6,729.6 1097.6,1443.2 677.0,1977.4 873.1,2086.1 640.5,2020.9 578.8,2097.0 208.1,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[613.0,216.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.116395,42.310563]}},{"type":"Feature","properties":{"resourceCoords":[1264.0,730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1167342,42.3090992]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0031","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1459.0,2097.0 943.8,2061.7 619.7,2097.0 13.7,2097.0 295.5,1509.2 305.3,772.7 522.7,800.9 456.8,497.8 773.6,614.7 776.4,399.1 1222.6,505.9 1209.7,1790.8 1459.0,1823.7 1459.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11515161030026,42.31001015048478]}},{"type":"Feature","properties":{"resourceCoords":[1459.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11417514677855,42.30749724683678]}},{"type":"Feature","properties":{"resourceCoords":[1459.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11902475683196,42.306452018155454]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12000122035367,42.30896492180345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0032","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1430.2,1840.3 976.1,1894.4 1047.9,2097.0 412.4,2097.0 408.9,2097.0 93.5,2097.0 304.9,1913.0 46.7,1777.2 80.9,1199.2 257.7,925.0 545.4,199.2 901.0,360.6 907.1,-0.0 1122.1,-0.0 1152.4,351.6 1430.2,1840.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11082254328718,42.309980787553755]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11107625454697,42.30735254034113]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11612773549717,42.307623003954745]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11587402423739,42.31025125116737]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0033","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"397.4,2097.0 336.1,2037.0 337.9,2097.0 -0.0,2097.0 -0.0,236.1 416.4,7.8 1443.2,0.0 1472.0,43.5 1472.0,2097.0 397.4,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12687940245509,42.312586705782074]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12076772237793,42.31011311965322]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12549933374255,42.30362886855786]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13161101381971,42.306102454686716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0034","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 117.6,0.0 318.4,121.4 348.2,0.0 986.3,0.0 956.5,120.0 667.1,431.4 394.6,543.1 5.1,577.1 5.5,617.4 33.8,641.1 67.0,665.3 1114.2,689.6 1123.8,359.0 1211.0,585.1 1468.0,1038.6 1468.0,2097.0 -0.0,2097.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12877999499817,42.30763493276571]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.122483592002,42.305259478702624]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1270394325674,42.29856039528346]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13333583556357,42.300935849346544]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0035","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"335.4,284.9 303.1,341.6 282.0,323.9 278.2,0.0 354.1,0.0 525.6,226.1 508.4,321.8 630.5,125.0 665.6,0.0 682.7,0.0 757.6,118.8 827.4,0.0 869.6,0.0 868.6,30.9 949.0,189.5 998.2,203.6 1021.5,310.4 1025.5,210.0 1040.8,213.6 1114.0,501.9 1162.0,622.6 1215.5,901.2 1328.0,872.7 1356.0,1035.5 1356.0,1035.5 1379.9,1174.3 1379.9,1174.3 1415.8,1382.9 1468.0,1396.9 1468.0,1775.8 1184.5,1514.7 1013.8,2097.0 -0.0,2097.0 2.8,1586.0 54.5,1195.8 131.1,978.0 494.6,347.4 359.9,274.8 335.4,284.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1251279372031,42.30959539920732]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11793283009418,42.309772428918414]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11759329433126,42.30211747379543]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12478840144018,42.30194044408433]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0036","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1309.2,658.7 1418.6,1492.5 1321.0,1959.5 666.4,1786.5 635.4,1877.4 578.0,1870.1 -0.0,1602.9 -0.0,549.1 36.7,546.2 50.0,295.3 1331.1,207.8 1309.2,658.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1187453151256,42.307534850214154]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11529329123452,42.30806538728576]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11427225305658,42.30438023231273]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11772427694765,42.30384969524113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0037","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1225.2,300.0 1226.1,1651.4 1258.8,1652.3 692.3,1798.4 246.3,1831.2 199.4,328.0 1225.2,300.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11111343120695,42.30836706829915]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11082310569331,42.30572058444602]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11590601648192,42.30541129088087]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11619634199555,42.308057774733996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0038","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.1,1760.5 129.4,1298.2 294.8,916.1 -0.0,745.1 -0.0,678.7 350.1,821.8 804.0,117.2 1373.5,474.4 1294.3,860.6 1122.3,1281.9 1116.0,1343.6 1145.5,1797.6 136.1,1989.4 99.1,1760.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10702610582292,42.30792002277001]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10730849255064,42.305263855755804]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1123857415327,42.30556326318065]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11210335480499,42.30821943019486]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0039","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1464.0,1927.8 143.0,1880.4 144.6,119.0 1147.9,252.9 1144.0,399.7 1423.5,400.1 1424.2,0.0 1464.0,0.0 1464.0,1927.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10671323565123,42.30768847555779]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1038833812353,42.30613841406289]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10686446682418,42.303119482388865]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1096943212401,42.30466954388376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0004","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"405.8,1824.7 356.2,1107.8 369.9,468.9 -0.0,676.8 -0.0,0.0 1288.0,0.0 1258.7,89.2 1178.8,342.0 1164.4,394.4 996.5,1193.6 976.2,1813.1 405.8,1824.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10525739742704,42.31803295982538]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10209780916134,42.31703176592809]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1040131648707,42.31367994748488]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1071727531364,42.31468114138217]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0040__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 | 1898 | sanborn03693_014 p40 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5892.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0040__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0040","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1473.0,1323.7 829.9,1324.1 818.2,361.0 251.9,363.4 427.2,643.1 382.7,664.4 376.3,1049.7 396.2,1050.1 381.8,2016.0 377.3,2015.8 375.8,2097.0 1473.0,2097.0 1473.0,1323.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0040__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[321.0,1574.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.105634,42.304772]}},{"type":"Feature","properties":{"resourceCoords":[195.0,249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10245,42.308878]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p41","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0041","type":"ImageService3","width":1468,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6.2,511.1 1429.4,351.9 1463.5,723.7 916.9,1599.5 745.9,1748.9 111.0,1767.0 6.2,511.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[111.0,1098.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1146574,42.3048446]}},{"type":"Feature","properties":{"resourceCoords":[111.0,1767.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.114703,42.303636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0042","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"378.2,1793.8 325.3,1765.0 -0.0,1967.6 -0.0,1568.7 338.6,1323.0 341.4,1157.8 238.1,1004.7 401.0,866.2 165.8,568.2 505.3,344.0 971.6,270.3 1340.0,139.1 1325.8,2097.0 375.3,2097.0 431.8,1892.9 378.2,1793.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0042/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11090316912635,42.30714392378696]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10798058523402,42.30557851119479]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11097885250591,42.30247332492913]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11390143639824,42.3040387375213]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p43","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0043","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"906.0,2097.0 994.0,1892.8 981.9,1663.0 220.2,1802.1 192.0,1160.2 723.0,355.9 1296.3,720.5 1166.6,962.1 1453.3,1113.8 1387.2,1432.3 1063.8,2097.0 906.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[556.0,1740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1145886,42.3030318]}},{"type":"Feature","properties":{"resourceCoords":[952.0,1665.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1144485,42.3023192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0044","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"188.9,2097.0 173.6,145.6 1472.0,187.5 1472.0,2097.0 188.9,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10923803180516,42.30522783072255]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1063700358832,42.30364517814265]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.109397136583,42.3006020622513]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11226513250496,42.3021847148312]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0045","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,0.0 1129.2,0.0 1125.7,48.3 1472.0,83.8 1472.0,1894.5 317.1,1623.7 355.7,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1127746679505,42.30188190321928]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10975657597456,42.30055527421662]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11229385932235,42.29735273667079]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1153119512983,42.29867936567345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p46","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"1"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0046","type":"ImageService3","width":1474,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"580.1,1976.4 472.6,1958.8 343.4,170.8 -0.0,158.1 0.0,0.0 1474.0,0.0 1474.0,2097.0 565.4,2097.0 580.1,1976.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11030857612573,42.301026577370614]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10737068756004,42.299534453288935]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11024217007144,42.29644461339039]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11318005863714,42.29793673747207]}},{"type":"Feature","properties":{"resourceCoords":[580.0,1976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1118588,42.2975272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0047","type":"ImageService3","width":1482,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,0.0 363.9,0.0 395.6,559.5 739.4,531.8 665.4,77.3 1197.3,159.2 1288.7,1759.5 1243.4,2097.0 1190.0,2097.0 1075.6,1981.2 919.9,1954.5 975.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11531537673079,42.29993229000616]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11234067564916,42.29837235500596]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11530394293722,42.295237052420184]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11827864401884,42.296796987420386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0048","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"924.4,291.7 1472.0,221.7 1472.0,2097.0 921.5,2097.0 921.8,1911.4 469.0,1749.5 194.8,144.9 924.6,170.7 924.4,291.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11325679517563,42.29886196287843]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11059512369917,42.29710304420132]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11395902751102,42.294278568239356]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11662069898748,42.29603748691647]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0049","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"250.3,231.6 549.8,215.8 543.5,166.7 885.4,98.3 954.2,385.3 1097.6,726.6 982.8,757.4 870.4,735.1 887.1,814.3 1233.3,902.0 1425.1,904.1 1263.7,1488.9 1085.0,1421.5 830.0,2097.0 -0.0,2097.0 -0.0,433.7 362.1,612.6 250.3,231.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11857028973967,42.30567214161458]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11193859100784,42.304398605014896]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11438770939884,42.2973233654891]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12101940813066,42.29859690208878]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p5","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0005","type":"ImageService3","width":1469,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1180.1,1683.3 875.4,1741.5 921.5,2097.0 448.3,2097.0 251.4,1216.8 244.2,420.9 279.5,0.0 1469.0,0.0 1469.0,1955.9 1189.9,1991.0 1180.1,1683.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1170.0,1368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.102674,42.314174]}},{"type":"Feature","properties":{"resourceCoords":[515.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1032797,42.315592]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0051","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.3,1828.8 762.6,1851.0 682.6,1859.5 551.6,1824.4 91.7,1815.0 90.4,1645.2 -0.0,1644.4 -0.0,315.4 400.6,294.7 369.0,224.2 396.4,219.5 448.4,233.6 527.1,306.9 561.0,115.4 770.5,210.3 764.7,302.6 1038.4,319.2 1057.8,0.0 1473.0,0.0 1473.0,557.2 1323.3,501.4 1355.0,708.3 1111.2,634.9 1027.5,774.0 964.2,1606.0 1104.8,1835.6 770.3,1828.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11696895748669,42.29750249605824]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1113437010935,42.294217409738785]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11762174571626,42.288251783001236]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12324700210945,42.291536869320694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0052__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 | 1898 | sanborn03693_014 p52 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5880.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0052__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0052","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"268.8,1207.8 197.8,1501.7 620.1,1466.5 589.6,1804.7 557.1,1882.8 529.3,1917.5 510.2,1918.5 241.8,1773.2 151.5,1693.6 54.0,2097.0 1470.0,2097.0 1470.0,434.1 1379.4,441.0 1426.3,282.8 1215.5,331.5 1273.8,75.2 1124.7,0.0 263.9,0.0 -0.0,190.2 -0.0,216.1 64.5,169.0 143.5,280.1 245.4,364.2 264.3,452.6 441.9,491.3 401.0,660.4 216.5,536.8 148.4,626.6 23.4,708.4 257.1,920.9 188.6,1003.0 165.9,1156.7 196.2,1211.1 268.8,1207.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0052__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[257.0,921.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.114897,42.288603]}},{"type":"Feature","properties":{"resourceCoords":[529.0,1918.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1105494,42.2869664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0053","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.7,1229.4 32.4,1001.5 7.7,914.4 -0.0,-0.0 667.7,-0.0 782.4,33.0 879.5,22.4 886.7,-0.0 1221.8,-0.0 1313.9,139.7 1103.7,124.8 1038.1,964.6 1095.7,961.7 1066.1,1895.9 234.6,1883.5 222.7,1241.0 178.7,1229.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12282922514704,42.29260720216889]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11734055128503,42.289265695984774]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12376955919436,42.28340466599587]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12925823305638,42.28674617217998]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p54","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0054","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1422.2,1237.4 1462.0,1291.1 1462.0,1899.8 1309.0,2040.5 1220.6,1908.3 1096.2,1818.8 643.6,1696.5 623.8,1332.4 -0.0,1505.8 0.0,-0.0 477.9,-0.0 583.9,137.5 786.6,15.8 1328.7,-0.0 1343.0,265.7 1082.2,345.6 851.4,491.9 1312.2,1091.9 1352.2,876.3 1462.0,931.5 1462.0,1197.7 1422.2,1237.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[266.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.120414,42.288005]}},{"type":"Feature","properties":{"resourceCoords":[1309.0,2040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1201658,42.2855064]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0055","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.6,827.0 357.3,802.0 379.6,776.7 403.6,792.2 535.4,764.4 550.9,704.3 439.8,707.0 687.1,416.4 784.5,515.2 852.2,636.0 988.4,599.4 915.9,334.6 833.7,247.0 890.4,180.2 884.8,154.8 965.6,59.3 971.7,84.3 1023.1,24.2 1173.2,133.8 1171.3,136.2 1244.0,172.0 1283.0,253.2 1464.0,250.4 1464.0,423.2 1256.3,345.6 1211.4,447.9 1109.5,555.4 1385.6,708.0 1338.3,803.0 1352.3,956.8 1394.5,1002.6 1464.0,983.0 1464.0,1298.1 1277.2,1358.5 1464.0,1479.7 1464.0,2011.5 869.4,2097.0 -0.0,2097.0 5.2,1183.4 253.6,885.1 238.6,827.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12219479341205,42.287906473601]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11648081608209,42.29081769140822]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11088364590591,42.284720084714706]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11659762323588,42.28180886690748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p56","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0056","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"740.5,2097.0 392.6,2097.0 14.2,811.5 -0.0,605.7 -0.0,174.2 658.8,0.0 1461.0,0.0 1461.0,1974.8 740.5,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[450.0,305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1105494,42.2869664]}},{"type":"Feature","properties":{"resourceCoords":[88.0,1916.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.116427,42.283336]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p57","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0057","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1581.8 0.0,-0.0 855.8,-0.0 855.8,-0.0 1331.0,-0.0 1352.0,408.5 1278.2,404.9 1269.8,607.4 1348.7,703.0 1380.7,769.2 1385.2,871.3 1300.9,1194.9 1325.9,1453.6 1204.1,1436.8 1219.0,1831.3 1378.1,1843.7 1386.8,1901.2 1322.6,2097.0 69.5,2097.0 71.9,1584.2 -0.0,1581.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[791.0,1779.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.135921,42.290633]}},{"type":"Feature","properties":{"resourceCoords":[70.0,1980.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.139161,42.291791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0058","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"12.6,1617.7 410.4,1553.3 340.8,1130.4 -0.0,373.8 -0.0,334.0 100.4,321.2 135.3,0.0 934.4,0.0 892.8,245.4 1159.5,217.6 1060.2,1498.2 1363.4,1518.6 1309.3,1939.6 460.5,1908.1 12.6,1617.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13474636575482,42.289304141406326]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13255205627335,42.29129537835057]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12872086983236,42.288952251813534]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13091517931383,42.28696101486929]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0059","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1402.8,1827.6 134.1,1830.0 110.9,1576.0 252.1,808.4 191.1,623.8 -0.0,405.4 -0.0,0.0 148.0,-0.0 180.8,351.7 1393.5,341.7 1402.8,1827.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1298022516591,42.29315461911407]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12728081775768,42.29134501022082]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13076264540376,42.2886526494809]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13328407930518,42.29046225837415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0006","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.8,1241.7 567.3,1211.2 593.9,0.0 925.0,0.0 906.1,368.0 1212.8,384.1 1190.6,768.4 1467.0,746.4 1467.0,1110.1 1181.2,1142.2 1151.1,1810.8 293.2,1957.9 286.8,1241.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10240509166248,42.31538987879309]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09944129877397,42.313916542645124]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1022693770412,42.31076157503679]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1052331699297,42.31223491118476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0060","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1175.9,172.0 1181.5,1167.3 1344.7,1434.8 1389.7,1447.3 1390.0,1625.5 695.2,1627.2 695.8,1826.7 559.1,1807.4 612.1,1209.2 -0.0,1157.1 -0.0,0.0 1385.3,0.0 1388.2,174.4 1175.9,172.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12666433125317,42.29566220895738]}},{"type":"Feature","properties":{"resourceCoords":[1457.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12128445053843,42.292463236766274]}},{"type":"Feature","properties":{"resourceCoords":[1457.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12746486336837,42.28669499595238]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13284474408312,42.28989396814349]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p61","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"8"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0061","type":"ImageService3","width":1464,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1369.3,2097.0 1369.0,1831.8 1116.5,1972.8 1076.2,1973.5 1001.6,2097.0 472.4,2097.0 417.4,2024.5 415.3,2097.0 -0.0,2097.0 0.0,-0.0 1192.5,-0.0 1192.6,84.8 1264.4,87.3 1262.2,1287.5 1464.0,1286.8 1464.0,2054.0 1422.8,2097.0 1369.3,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1369.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1430638,42.2879355]}},{"type":"Feature","properties":{"resourceCoords":[1262.0,482.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.139161,42.291791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p62","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0062","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1053.9,2097.0 857.1,2097.0 375.9,2097.0 92.8,1020.0 90.3,340.2 1112.8,336.6 1263.6,469.8 1466.0,1732.2 1466.0,2050.3 1434.8,2097.0 1053.9,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[809.0,219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.136522,42.290088]}},{"type":"Feature","properties":{"resourceCoords":[91.0,604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.140382,42.290766]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0063","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"623.4,2014.1 0.0,1504.2 -0.0,0.0 237.9,0.0 828.0,269.6 1149.0,1062.7 1201.5,1479.8 809.4,1528.2 1086.0,1726.3 654.6,1717.1 669.4,1962.7 623.4,2014.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13588492131166,42.28801709676105]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13374681092664,42.290112876498284]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12972281424494,42.287834386815156]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13186092462996,42.285738607077924]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0064","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"300.2,1870.7 232.8,1822.4 -0.0,1859.5 -0.0,1410.3 104.1,1240.9 145.4,415.9 -0.0,394.5 -0.0,-0.0 1375.7,0.0 1368.0,1772.4 436.8,1754.6 300.2,1870.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12889297127222,42.28965971845821]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12614825172984,42.28803584844942]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12926400965638,42.28511289324192]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13200872919876,42.286736763250715]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0065","type":"ImageService3","width":1473,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.2,2097.0 -0.0,2097.0 -0.0,1072.7 111.2,923.9 288.6,490.1 -0.0,418.7 -0.0,209.4 428.9,227.3 322.0,440.8 328.3,677.9 1473.0,647.5 1473.0,967.3 1132.6,1256.4 1286.2,1435.0 1340.1,1999.9 1473.0,2002.4 1473.0,2097.0 300.3,2097.0 307.7,1965.3 162.2,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13547789868085,42.289339318181106]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13270104008139,42.28767858778974]}},{"type":"Feature","properties":{"resourceCoords":[1473.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13587452145441,42.284733431728476]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13865138005387,42.28639416211984]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0066","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"862.8,794.9 1460.0,32.7 1460.0,1535.7 1318.5,1532.6 1299.6,2097.0 935.6,2097.0 946.4,1733.1 1211.2,1741.2 1208.8,1583.5 414.5,1576.0 409.0,1528.0 250.7,1350.8 862.8,794.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13363335628948,42.28843621250779]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13094659756317,42.28676759995495]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1341634915398,42.2838925951401]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13685025026611,42.28556120769294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0067","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.9,1877.6 254.5,1838.5 277.6,319.9 360.7,233.0 1316.4,243.1 1325.9,1877.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13103212566787,42.28747044209087]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12833071989262,42.28584402636177]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13145551429875,42.28296317034701]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.134156920074,42.28458958607611]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0068","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1337.9,411.6 715.1,2089.4 -0.0,2072.9 -0.0,471.2 1337.9,411.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13252569815083,42.28371496521702]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13019594047316,42.28570950679608]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12636920431072,42.28322830573263]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12869896198839,42.28123376415357]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0069","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1235.8,1795.8 1397.8,2097.0 14.7,2097.0 215.1,1914.4 216.9,469.9 576.0,192.5 588.2,598.6 1227.1,789.3 1235.8,1795.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13041304720394,42.2857727268007]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1269902657291,42.28637533335512]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12583723129927,42.282740016552864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12926001277411,42.28213740999845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0007","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"600.5,1949.2 319.8,1718.7 -0.0,852.5 -0.0,0.0 112.4,0.0 1472.0,252.8 1472.0,1053.8 1053.9,1859.1 600.5,1949.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0998371987417,42.31515982173222]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09697682311581,42.31357344133312]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10001153696916,42.31053889412924]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10287191259505,42.31212527452834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0070","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.0,590.5 643.9,256.2 1467.0,235.2 1467.0,1933.9 221.2,1910.3 811.2,1125.8 411.0,590.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1304238246856,42.285093165646664]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1281698293223,42.28708704126228]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12434428750817,42.28468657967644]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12659828287146,42.28269270406082]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0071","type":"ImageService3","width":1472,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,124.5 1355.0,232.6 1306.0,913.2 1385.5,1651.5 1472.0,1634.0 1472.0,1967.0 1273.3,2097.0 552.5,2097.0 553.7,1957.9 0.0,1940.1 0.0,124.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12630187137937,42.28380396800412]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12419910571786,42.28592739341668]}},{"type":"Feature","properties":{"resourceCoords":[1472.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12013891163626,42.283695557131864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12224167729777,42.28157213171931]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0072","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1462.0,1374.3 1462.0,1699.3 1409.5,1691.4 1414.0,1780.2 666.4,1748.1 -0.0,1597.6 327.1,217.7 213.2,192.2 268.0,0.0 556.5,0.0 556.5,0.0 918.3,0.0 837.5,356.2 1156.2,526.5 1336.8,715.1 1386.0,866.1 1391.0,1319.8 1462.0,1374.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12212788890572,42.28801963468955]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11904019916697,42.28680614191852]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12137645802301,42.28350661251386]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12446414776176,42.28472010528489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0073","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1493.8 -0.0,473.5 373.9,462.4 379.9,531.5 736.9,501.7 830.1,428.9 818.5,289.8 974.8,252.6 992.9,212.2 1210.5,157.9 1277.3,236.8 1460.0,244.8 1460.0,303.6 1151.4,526.8 923.8,1390.5 1113.1,1439.2 1135.8,1771.6 419.7,1733.5 328.4,1266.5 -0.0,1493.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12459008391369,42.28260235023664]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11994605324757,42.28655627121929]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1123238387359,42.281586538329364]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11696786940202,42.27763261734671]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0074","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1462.0,2097.0 451.0,2097.0 342.4,2006.5 -0.0,2092.1 -0.0,111.7 238.1,90.7 211.0,-0.0 1462.0,-0.0 1462.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11386515088351,42.28199462042229]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1113547415769,42.28017327040372]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11486093212505,42.277490369993956]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11737134143166,42.27931172001252]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p75","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0075","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1872.7 -0.0,1194.9 106.3,1089.2 -0.0,970.8 -0.0,0.0 932.1,0.0 987.2,1116.5 737.1,1486.0 1095.0,1490.0 1106.4,1859.0 -0.0,1872.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[108.0,1677.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.136392,42.282963]}},{"type":"Feature","properties":{"resourceCoords":[108.0,1872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.136041,42.282731]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0076","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1391.7,2033.9 -0.0,2036.8 -0.0,1750.0 89.8,1750.5 96.1,65.5 1305.7,61.6 1391.7,2033.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0076/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13362734780252,42.28502778519481]}},{"type":"Feature","properties":{"resourceCoords":[1459.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13101375022332,42.28332194957428]}},{"type":"Feature","properties":{"resourceCoords":[1459.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13430448331962,42.2805231647128]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13691808089882,42.28222900033333]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0077","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"129.8,545.3 1465.0,585.1 1465.0,1802.1 1236.5,1817.5 1229.3,2097.0 147.9,2097.0 129.8,545.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1310772508006,42.28405941266032]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1283557649076,42.282398458311214]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13154674321794,42.279496029724065]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13426822911094,42.28115698407317]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p78","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"16"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0078","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"745.8,2097.0 696.2,2097.0 374.7,2097.0 252.5,1958.9 230.0,1351.2 341.6,477.4 1246.2,404.0 1459.0,1436.2 1459.0,1547.9 1459.0,1552.3 923.8,2097.0 745.8,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[697.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1266171,42.2812799]}},{"type":"Feature","properties":{"resourceCoords":[372.0,1941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1306084,42.2796702]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0079","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,147.5 262.8,44.0 301.9,125.0 310.1,282.6 819.5,122.3 1157.9,1101.1 914.3,1419.5 925.0,1438.0 1102.5,1211.8 1287.7,1361.2 1236.3,1667.6 1154.1,1889.2 1463.0,1897.0 1463.0,2031.3 1422.3,2097.0 423.3,2097.0 618.5,1835.3 616.7,1802.0 397.9,2097.0 -0.0,2097.0 -0.0,147.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1265601,42.2804288]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1204847,42.2829765]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1155491,42.27653339999999]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1216245,42.2739857]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0008","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"88.5,2097.0 -0.0,2097.0 -0.0,972.5 541.4,966.9 669.8,177.1 0.0,-0.0 1470.0,0.0 1470.0,1711.5 1285.8,1627.8 1186.3,1633.0 1265.5,1846.2 98.4,2020.5 88.5,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09858657589827,42.314049032672536]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09542220488972,42.31282548459515]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09776596980178,42.30946380297986]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10093034081034,42.31068735105725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0080","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"693.6,903.1 526.0,462.9 0.0,670.0 0.0,627.8 1211.2,140.0 1463.0,9.1 1463.0,962.5 1227.3,903.2 1226.9,1254.1 1107.9,1358.1 922.1,2097.0 400.7,2097.0 458.3,1997.8 0.0,1702.8 0.0,1621.3 302.9,1373.4 693.6,903.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12073110890145,42.27822545413582]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11896117477777,42.28049831951855]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11458887293128,42.278608027551115]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11635880705497,42.27633516216839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p81","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0081","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"898.7,1842.9 329.9,1795.7 342.4,1334.9 311.0,1331.3 342.6,755.9 171.9,757.1 156.2,780.2 156.0,1746.8 92.8,1737.5 -0.0,1666.1 -0.0,606.4 384.0,637.1 383.1,580.6 -0.0,555.0 0.0,0.0 1470.0,0.0 1470.0,2034.1 1444.9,2097.0 1189.9,2097.0 1106.8,2000.0 1038.6,1854.5 898.7,1842.9 898.7,1842.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[343.0,1724.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1556578,42.292098]}},{"type":"Feature","properties":{"resourceCoords":[156.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.156293,42.291643]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0082","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,615.5 117.6,0.0 1463.0,0.0 1463.0,954.0 1349.1,2019.1 1463.0,2050.0 1463.0,2097.0 -0.0,2097.0 -0.0,1368.9 42.5,1377.3 73.0,1032.3 -0.0,890.0 -0.0,615.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1559857237977,42.29164645870786]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14999609538762,42.294468739962724]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14456586351957,42.288073011664366]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15055549192965,42.2852507304095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p83","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"15"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0083","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.1,802.9 187.7,802.3 182.0,769.0 170.1,781.5 153.9,413.5 1222.1,690.0 1234.3,644.0 1256.6,656.1 1258.5,696.4 1406.5,944.3 1085.8,954.4 1187.4,1045.5 1463.0,1037.6 1463.0,1744.5 1193.2,1469.9 1135.3,1532.0 1137.4,1700.9 953.7,1710.4 940.4,1355.9 946.1,1331.1 1002.8,1275.3 865.6,1135.6 882.9,1820.7 713.3,1827.9 715.6,1901.5 1197.2,1883.8 1211.6,2044.6 -0.0,2086.7 -0.0,1128.3 173.9,873.5 171.1,802.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[719.0,2065.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1413737,42.2834192]}},{"type":"Feature","properties":{"resourceCoords":[1257.0,656.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1445718,42.2882453]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p84","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0084","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,-0.0 112.6,-0.0 787.9,190.4 763.1,-0.0 1159.7,-0.0 1162.2,78.8 1029.9,76.0 1027.5,257.9 1159.5,810.2 1202.8,1151.7 1161.0,1827.2 587.6,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[899.0,743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.137116,42.283477]}},{"type":"Feature","properties":{"resourceCoords":[1187.0,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1394546,42.2798776]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0085","type":"ImageService3","width":1466,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"406.0,2097.0 406.4,1962.2 -0.0,1968.6 -0.0,1014.8 70.3,1013.5 72.5,612.9 -0.0,541.8 -0.0,215.3 1366.2,211.9 1358.9,-0.0 1466.0,-0.0 1466.0,1625.2 1403.5,1625.4 1406.5,2097.0 406.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0085/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13644805757146,42.282574122928025]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13381269878126,42.28085270490238]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13711750589522,42.2780439819692]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13975286468542,42.279765399994844]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p86","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0086","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 95.7,0.0 94.0,229.6 249.4,0.0 395.4,0.0 1088.7,260.5 1462.0,977.4 1462.0,1966.1 598.0,2097.0 178.3,2097.0 117.5,1582.7 -0.0,1580.1 -0.0,1506.9 108.5,1506.7 -0.0,589.1 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,838.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1327305,42.2786118]}},{"type":"Feature","properties":{"resourceCoords":[173.0,230.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1369781,42.2783315]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0087","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 0.0,-0.0 149.8,0.0 164.6,100.3 210.7,99.5 225.2,511.6 643.5,502.4 622.5,0.0 1372.0,12.2 1250.3,819.3 1463.0,797.0 1463.0,1650.2 1417.0,1793.6 1463.0,1808.7 1463.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13268868340468,42.27458935761143]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1278919749375,42.27849038660488]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1203881058739,42.27336713761269]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12518481434108,42.26946610861924]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0088","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"8.0,1381.9 -0.0,1170.0 -0.0,-0.0 447.9,0.0 932.0,0.0 1463.0,1518.0 1463.0,1546.4 1463.0,1550.9 1463.0,2097.0 497.4,2097.0 339.5,2097.0 316.1,2097.0 8.0,1381.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12962490791448,42.27770235212099]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1237090856142,42.28053988976856]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11825073733142,42.27422153921378]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1241665596317,42.271384001566204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0089","type":"ImageService3","width":1471,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1116.8,2087.8 322.4,2097.0 69.1,2005.6 -0.0,1839.7 -0.0,398.8 94.2,389.8 223.0,-0.0 1356.7,-0.0 1379.0,112.4 1116.8,2087.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15932061386792,42.29601801860689]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15560516588026,42.291576641389476]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16410438408947,42.28763096573206]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16781983207713,42.292072342949474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0009","type":"ImageService3","width":1470,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,254.6 -0.0,0.0 1470.0,0.0 1470.0,2097.0 793.6,2097.0 406.6,695.7 395.9,206.3 -0.0,254.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1004849705756,42.3143332557471]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09811029733618,42.31626734162178]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09440532782378,42.31374469066491]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0967800010632,42.31181060479023]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p90","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0090","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"392.2,3.4 524.8,40.2 668.0,118.1 665.5,0.0 839.8,0.0 863.0,316.6 958.6,394.0 1035.2,418.1 1176.0,392.0 1169.4,0.0 1200.0,0.0 1243.0,374.7 1233.8,738.7 1417.8,727.4 1421.3,536.1 1465.0,533.1 1465.0,2050.2 1394.9,1985.8 1399.0,1585.3 1291.8,1293.1 1228.5,1316.8 1230.8,1070.0 1135.0,1066.0 1141.5,1341.6 1228.4,1344.4 1195.5,1829.5 1015.0,1801.1 730.2,1864.1 512.1,1108.8 668.6,1067.0 392.2,3.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,317.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1573849,42.2915796]}},{"type":"Feature","properties":{"resourceCoords":[395.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.157748,42.288751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0091","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1032.7,379.7 1150.1,447.5 914.3,1139.1 1264.0,1258.3 1257.4,1513.4 1315.4,2097.0 247.1,2097.0 223.5,2003.9 236.8,1608.2 135.2,506.7 217.5,523.8 256.4,304.1 536.3,313.2 1032.7,379.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15760591227547,42.28526062273566]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15317529911512,42.28935741414008]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14529350294225,42.2846260029371]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1497241161026,42.28052921153269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0092","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1458.0,1604.8 1458.0,2097.0 1255.3,2097.0 563.3,1722.9 256.1,611.4 1334.2,587.6 1458.0,1604.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0092/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15200074790468,42.28192711966869]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14750770997114,42.28589940037127]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1398396728611,42.28108460734666]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14433271079464,42.27711232664408]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p93","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"15"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0093","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"364.1,1690.7 345.5,1691.4 345.1,1636.8 364.1,1635.3 364.6,800.8 324.9,781.3 -0.0,783.2 -0.0,362.6 42.4,362.3 49.9,85.2 820.3,86.0 820.0,153.6 1086.7,156.0 1086.5,253.0 1461.8,253.7 1459.2,335.3 1324.5,334.1 1320.5,611.6 1467.0,631.9 1467.0,2097.0 348.6,2097.0 364.1,1690.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[192.0,1672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1460588,42.2766802]}},{"type":"Feature","properties":{"resourceCoords":[643.0,87.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1394546,42.2798776]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0094","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.0,684.6 181.2,409.2 314.9,409.5 316.1,328.6 538.5,318.3 534.7,163.1 176.6,155.1 177.0,-0.0 790.0,-0.0 783.5,156.9 1463.0,147.3 1463.0,2097.0 321.7,2097.0 314.8,702.7 177.0,684.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0094/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13712781364694,42.27916560791091]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13182802969929,42.27572209133632]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13845191237138,42.27006157666275]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14375169631903,42.27350509323734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0095__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 | 1898 | sanborn03693_014 p95 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3420.0"},{"label":"split_canvas_w","value":"5852.0"},{"label":"split_canvas_h","value":"4968.0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0095__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0095","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.2,855.6 350.5,871.8 280.4,1788.0 150.0,1783.6 117.2,2097.0 565.5,2097.0 557.4,1795.0 1225.2,1802.5 1214.8,1985.3 1463.0,1979.8 1463.0,876.5 1419.2,855.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0095__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[699.0,1792.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1595682,42.2874405]}},{"type":"Feature","properties":{"resourceCoords":[917.0,1480.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1599,42.288777]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0096","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"539.0,1904.1 208.6,1926.2 215.6,1660.7 -0.0,1638.0 -0.0,110.2 1323.7,170.5 1293.3,532.6 1463.0,529.5 1463.0,2097.0 499.9,2097.0 539.0,1904.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1602351029108,42.28720944816583]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1578208874564,42.28914487284044]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15409722004,42.286566833006965]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15651143549441,42.28463140833236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0097","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,875.3 1008.2,768.6 1137.5,1689.5 128.3,1724.4 130.6,1868.5 -0.0,1871.1 -0.0,875.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16203841812438,42.286265049029225]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15929287587895,42.28792770753606]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15609405687151,42.284995803644094]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15883959911694,42.283333145137256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0098","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1463.0,2097.0 1358.9,2097.0 1197.9,1827.4 801.2,1853.8 784.1,2097.0 132.1,2097.0 143.7,1553.8 -0.0,1551.1 -0.0,328.1 264.6,307.4 210.6,-0.0 847.7,-0.0 842.8,167.0 1463.0,-0.0 1463.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15633030593125,42.28584290835256]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15399720219685,42.28384936979596]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15783247447327,42.28135781354777]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16016557820767,42.283351352104376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1898 | sanborn03693_014 p99","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T06:02:54Z","modified":"2026-09-21T06:02:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0099","type":"ImageService3","width":1465,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"501.8,1608.4 584.8,1078.7 317.6,1036.8 518.5,146.2 492.0,140.3 1165.0,103.0 1135.9,438.6 1413.4,461.5 1391.5,808.1 1073.7,796.7 973.9,2070.2 517.6,2097.0 601.6,1625.5 501.8,1608.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189807:03693_07_1898-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15559396255796,42.285369805800826]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14990771520617,42.28226861028665]}},{"type":"Feature","properties":{"resourceCoords":[1465.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15586554383432,42.276204201067685]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.16155179118611,42.27930539658186]}}]}}]}