{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03693_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boston, Massachusetts | 1888 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"88"},{"label":"placed","value":"68"},{"label":"unplaced","value":"20"},{"label":"fit sources","value":"georef-snap 51, georef 7, snap:0 7, georef-street 2, snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p100L__1 (tier 1, 42.29488,-71.10177 +/-146m); p100L__2 (tier 1, 42.29985,-71.10664 +/-184m); p100L__3 (tier 1, 42.29298,-71.10606 +/-112m); p100R__1 (tier 1, 42.29639,-71.10788 +/-185m); p100R__2 (tier 1, 42.29463,-71.09927 +/-190m); p66L (tier 3, 42.33299,-71.08959 +/-100m); p66R (tier 3, 42.33299,-71.08959 +/-659m); p67L (tier 3, 42.33132,-71.08603 +/-659m); p74L__2 (tier 1, 42.32676,-71.08266 +/-110m); p81L__1 (tier 1, 42.30548,-71.11391 +/-132m); p84R (tier 1, 42.32215,-71.08358 +/-252m); p89R__2 (tier 3, 42.32111,-71.09260 +/-659m); p91L (tier 1, 42.32130,-71.09853 +/-207m); p98L (tier 3, 42.33317,-71.11827 +/-659m); p98R (tier 3, 42.33317,-71.11827 +/-659m); p99L__1 (tier 1, 42.29336,-71.12036 +/-242m); p99L__2 (tier 1, 42.29366,-71.11877 +/-100m); p99R__1 (tier 1, 42.29538,-71.11681 +/-194m); p99R__2 (tier 1, 42.29352,-71.11848 +/-100m); p99R__3 (tier 1, 42.29509,-71.11812 +/-156m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p62L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062L","type":"ImageService3","width":1431,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"19.9,142.6 76.0,96.5 85.1,103.8 237.1,103.0 274.5,35.1 274.1,43.3 1297.4,56.3 1389.6,195.0 1430.0,188.8 1430.0,1994.4 1243.0,1999.5 636.9,2017.7 384.1,2020.6 257.4,2020.4 154.7,2015.6 164.4,1646.3 165.4,1412.4 160.8,1279.0 146.1,1151.8 116.2,967.5 86.8,715.5 13.6,205.4 13.5,200.2 15.0,200.0 15.0,180.0 13.2,177.4 13.2,171.2 16.0,171.0 16.0,147.0 12.9,146.0 19.9,142.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1037.0,709.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09695302053619,42.33723755986383]}},{"type":"Feature","properties":{"resourceCoords":[165.0,2016.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0950161055427,42.334802410042194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p62R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.9,2008.0 24.2,2007.5 207.4,2005.3 234.6,1977.5 1189.5,2031.3 1328.8,1955.7 1349.4,1356.0 1272.4,1300.4 1314.9,1128.2 1253.7,879.6 1390.5,451.4 1350.6,108.2 1040.2,89.3 792.8,166.4 465.9,113.3 1.0,183.0 1.0,2008.0 1.9,2008.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09807120491483,42.3384248582611]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09657146797844,42.34074097950151]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09209595379669,42.339135144734364]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09359569073308,42.33681902349395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p63L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063L","type":"ImageService3","width":1441,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1427.2,918.3 1424.5,1039.1 1409.9,1027.0 1413.2,1289.8 1428.5,1290.5 1431.8,1924.2 1386.0,1924.3 1099.0,1925.5 568.4,1924.3 316.6,1949.2 192.8,1949.8 214.8,1585.8 304.1,1417.0 227.1,1200.1 175.8,1199.0 335.8,1072.8 369.5,643.2 193.3,430.9 178.1,201.8 272.8,241.5 925.3,85.5 1087.5,160.9 1362.4,689.7 1425.8,666.0 1427.2,918.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,1604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10202131468562,42.33320268530733]}},{"type":"Feature","properties":{"resourceCoords":[559.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10338296071143,42.333677676211266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p63R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063R","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"20.9,638.1 19.0,896.9 14.7,1020.8 1.0,1009.0 1.0,1277.8 15.6,1278.7 10.9,1928.9 22.9,1929.0 451.8,1935.0 531.6,1960.0 1086.4,1992.5 1101.5,1985.6 1160.8,1939.1 1170.1,1947.0 1328.0,1950.6 1368.5,1880.9 1390.0,1560.8 1289.5,1244.8 1247.3,755.8 1277.5,294.3 1097.7,48.6 947.4,56.5 912.6,149.8 685.6,252.7 593.6,389.2 390.5,507.1 20.9,638.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10453660844202,42.33571832422147]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10315398458698,42.337988091612154]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09877431771426,42.33650965167715]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1001569415693,42.33423988428646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p64L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064L","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"180.4,988.4 170.9,576.9 107.7,405.8 185.1,160.8 307.2,155.7 554.9,121.7 1078.8,103.2 1362.2,91.5 1419.0,89.1 1436.0,701.7 1438.0,1312.5 1388.5,1312.9 1387.2,1969.5 795.0,1974.7 757.1,1958.8 569.8,1980.0 290.2,2037.5 123.7,2053.4 122.6,1728.6 117.8,1392.0 6.3,1078.8 180.4,988.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[124.0,1715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09837852439765,42.33098060222225]}},{"type":"Feature","properties":{"resourceCoords":[124.0,1045.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09981704588779,42.33153219490461]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p64R","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"486.6,61.1 564.6,82.0 1102.3,90.3 1109.7,86.7 1111.2,146.5 1192.4,658.4 1225.8,911.5 1258.6,1096.4 1275.2,1224.1 1281.9,1358.2 1284.3,1593.5 1280.0,1965.1 1028.8,1965.0 837.9,1960.0 304.0,1957.7 71.4,1954.3 15.8,1953.7 25.5,1296.9 75.0,1297.0 80.8,686.1 71.6,73.1 486.6,61.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.100663,42.3343189]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0991083,42.3366059]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0946428,42.334946900000006]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0961975,42.3326599]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p65L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"410.4,1453.3 122.5,1280.7 143.7,1286.2 136.7,941.9 295.8,883.8 219.6,868.5 228.9,745.7 228.6,658.6 241.2,228.3 219.2,172.7 234.2,172.5 243.8,172.4 776.2,160.9 966.7,161.0 1217.1,154.7 1320.4,155.4 1390.2,152.7 1389.2,1173.8 1402.8,1175.4 1410.8,1176.2 1398.3,1865.5 1442.0,1886.3 1442.0,1906.2 1442.0,1951.0 1391.3,1926.3 1386.8,1893.2 812.8,1670.9 799.1,1638.3 410.4,1453.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[814.0,1661.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09226940330409,42.33287518893315]}},{"type":"Feature","properties":{"resourceCoords":[1222.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09503035009479,42.33479681358443]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p65R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.51"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.5,1158.2 35.6,1157.3 22.2,1155.8 14.9,149.4 70.9,147.1 319.5,133.5 914.9,89.9 1121.4,75.3 1300.3,64.7 1195.3,183.0 1263.1,323.7 1213.0,401.5 1263.2,695.4 1243.3,1339.9 1364.9,1688.0 932.0,1880.4 518.0,1859.8 190.2,1936.1 110.6,2021.5 47.5,2013.4 30.4,1897.4 80.3,1921.6 79.8,1857.8 36.8,1837.5 43.5,1158.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09517446887082,42.335167433894235]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09349840605555,42.33746932590832]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08903508738989,42.335668331935196]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09071115020517,42.33336643992111]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0067R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p67R","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0067R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0067R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.6,1778.9 492.9,1771.6 638.4,1776.0 714.0,1663.3 837.8,1500.0 908.2,1432.9 947.1,1414.8 952.4,1434.6 957.1,1451.2 1418.0,1213.7 1418.0,1160.8 1136.6,634.2 1095.8,550.2 1061.8,453.4 1068.5,293.6 1024.9,290.6 523.0,209.8 54.6,219.2 40.5,1622.1 97.8,1721.0 1.0,1747.2 1.0,1782.4 198.6,1778.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0067R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08434879000721,42.33263145769249]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08160815439433,42.3310685265596]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08465982191122,42.32814404530857]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0874004575241,42.329706976441464]}},{"type":"Feature","properties":{"resourceCoords":[428.0,1265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0853973,42.3303749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p68L","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1367.5,36.5 1205.6,20.1 1105.2,48.8 1017.5,85.2 465.8,339.4 412.1,336.2 440.4,352.2 128.3,510.6 60.4,561.0 105.7,617.9 215.3,816.5 446.0,1275.6 492.7,1345.2 586.8,1473.9 766.8,1711.1 1001.4,2047.1 1059.7,2024.0 1421.3,1895.2 1442.0,1817.0 1442.0,1610.6 1442.0,1606.5 1426.4,1601.8 1417.3,1287.2 1410.7,1286.9 1412.3,964.9 1407.5,964.3 1416.4,596.7 1412.3,49.8 1379.0,1.0 1378.1,1.0 1367.5,36.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.0,1118.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081357,42.3291741]}},{"type":"Feature","properties":{"resourceCoords":[602.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0824959,42.3293014]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p68R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.56"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068R","type":"ImageService3","width":1429,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"454.9,1757.8 431.1,1767.5 271.1,1821.2 16.8,1884.5 38.3,1806.8 40.9,1596.7 25.4,1591.8 20.1,1277.8 13.6,1277.3 19.0,956.1 14.2,955.4 27.4,588.8 29.9,43.0 38.2,55.6 1327.1,70.7 1387.4,647.2 1270.4,1911.0 1215.7,1947.1 656.1,1783.9 454.9,1757.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0068R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08277580544642,42.331099424872015]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08090749279258,42.33320958577933]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07680762839946,42.33119765918319]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0786759410533,42.329087498275875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p69L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"377.9,1622.8 409.6,1680.0 535.1,1866.8 593.5,1946.8 953.0,1938.0 1241.3,1941.4 1418.4,1950.3 1425.4,1480.1 1422.8,1479.9 1428.6,1072.9 1424.4,720.1 1424.2,305.0 1442.0,300.0 1442.0,196.3 1442.0,173.7 1413.3,176.0 873.8,74.8 96.6,36.5 89.6,28.4 1.0,596.5 1.0,807.3 12.8,828.0 86.4,980.0 181.7,1224.4 348.6,1567.8 377.9,1622.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1226.0,1039.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0768339651924,42.328338666703175]}},{"type":"Feature","properties":{"resourceCoords":[1226.0,1936.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07822794991682,42.32713600185367]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p69R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069R","type":"ImageService3","width":1429,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"376.6,156.1 879.4,233.2 977.0,149.8 1265.2,161.8 1383.0,299.6 1338.5,863.0 1317.1,862.2 1261.1,1188.3 1242.0,1554.2 1114.0,1585.5 1255.2,1656.9 1428.0,1763.0 1428.0,1967.6 1403.5,2005.5 1046.9,1991.8 332.4,1951.8 33.8,1936.3 41.5,1471.5 39.0,1471.3 45.3,1069.0 41.8,720.4 42.3,310.1 59.9,305.1 60.1,180.3 376.6,156.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1336.0,537.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07331292705884,42.3272859475627]}},{"type":"Feature","properties":{"resourceCoords":[1336.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07281864597383,42.32771385266259]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p70L","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070L","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"776.0,109.7 852.8,96.3 1406.0,375.8 1416.6,789.5 1408.1,788.5 1398.2,1867.8 1287.0,1862.7 1260.6,1860.4 1134.0,1849.3 1007.3,1838.2 833.9,1808.3 599.0,1744.0 534.3,1843.0 515.9,1898.8 464.0,1703.0 270.6,1644.0 116.4,1610.5 232.2,1548.2 158.8,1190.3 131.1,861.5 151.9,857.0 53.7,302.1 776.0,109.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[635.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0749335,42.3252094]}},{"type":"Feature","properties":{"resourceCoords":[-1144.0,558.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0750247,42.3290501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p70R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070R","type":"ImageService3","width":1429,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1140.6,1871.5 1117.2,1867.2 972.8,1853.6 613.6,1854.8 448.9,1869.2 184.4,1867.0 91.0,1862.6 44.1,1861.4 37.4,774.7 45.9,775.5 28.8,359.3 84.9,386.3 509.5,241.2 1231.2,194.8 1276.9,262.1 1265.1,794.1 1369.6,1060.2 1304.4,1034.4 1237.8,1331.3 1141.0,1761.2 1140.6,1871.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07044615758397,42.32589301632928]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0685338158937,42.323771652747126]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07265503830148,42.32171210888682]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07456737999175,42.323833472468976]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p71L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"55.3,865.3 116.4,876.4 118.6,987.3 50.0,1456.9 17.3,1573.0 59.6,1601.3 109.3,2052.3 113.3,2052.4 136.7,2052.5 139.2,2003.2 1222.1,2041.4 1338.3,2018.4 1409.0,1935.7 1408.3,1860.0 1426.5,1779.4 1419.5,1666.8 1440.6,1660.2 1440.4,1051.9 1437.3,691.4 1434.7,691.5 1433.9,341.4 1442.0,341.6 1442.0,154.1 1433.3,63.8 1418.4,65.8 1266.5,19.1 229.9,48.6 227.1,41.2 161.3,15.2 95.6,313.2 1.0,740.0 1.0,855.4 55.3,865.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[167.0,841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07239998730563,42.322103225811325]}},{"type":"Feature","properties":{"resourceCoords":[558.0,993.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07218118652577,42.321377539367205]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p71R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071R","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"14.0,1916.2 96.6,2008.9 366.2,2027.0 825.2,1953.6 968.6,1849.4 1163.5,1816.8 1265.6,1666.2 1354.0,1643.8 1400.8,1609.8 1228.0,1381.7 1417.9,1227.1 1432.0,1185.1 1298.7,1008.1 1106.0,765.5 1194.3,714.8 639.9,101.8 376.1,28.1 41.0,72.8 48.8,162.5 47.1,348.8 39.1,348.6 36.7,696.4 39.3,696.3 39.1,1054.5 33.8,1658.9 12.8,1665.3 18.8,1777.2 1.0,1853.0 1.0,1931.3 14.0,1916.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06907345419467,42.321139043940796]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06713710839345,42.31901307067754]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07125537921556,42.316933305098836]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07319172501677,42.31905927836209]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p72L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"102.0,1827.6 35.7,1545.7 273.6,1481.8 309.2,1472.2 253.0,1230.5 174.2,927.0 276.2,916.9 15.0,122.0 24.2,129.7 75.4,53.1 418.8,28.2 1426.1,75.7 1429.3,74.6 1428.8,860.7 1439.4,860.3 1420.5,1863.0 1376.1,1863.5 1375.8,1934.2 1351.8,1906.9 1243.3,1992.2 1051.2,1914.0 939.4,2037.3 228.4,2048.1 108.9,2014.6 45.0,1839.5 102.0,1827.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[40.0,1539.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07014974573367,42.31793291203319]}},{"type":"Feature","properties":{"resourceCoords":[711.0,902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.06798076620834,42.31826443645049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p72R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072R","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"44.8,77.1 47.9,856.6 58.4,856.1 44.2,1850.5 1.0,1851.5 1.0,1922.7 98.3,2031.5 1355.9,2031.2 1388.9,1528.7 1267.7,1123.5 1247.1,208.9 1112.0,151.5 1111.9,80.2 892.5,31.4 550.2,87.0 173.3,30.8 44.8,77.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06546718639137,42.31899754365448]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0625569199945,42.31762881892968]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06520821042359,42.31450288261599]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06811847682046,42.315871607340796]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p73L","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073L","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"499.3,1810.8 539.6,1793.1 585.9,1798.3 576.0,1777.0 402.9,1853.2 224.8,1929.8 216.2,1846.5 109.3,1389.8 5.9,857.7 119.8,832.8 294.9,801.5 513.4,747.7 553.3,703.8 694.0,243.9 597.8,232.6 704.7,208.7 737.3,108.7 798.7,13.8 815.9,13.8 1035.6,72.8 1208.5,101.9 1334.7,112.3 1414.5,119.0 1421.3,599.9 1413.2,601.8 1417.3,876.7 1377.6,893.4 1378.8,1148.4 1436.0,1254.8 1436.0,1366.8 1331.9,1414.7 716.6,1707.2 592.3,1812.0 499.3,1810.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[576.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.078808,42.323798]}},{"type":"Feature","properties":{"resourceCoords":[1124.0,673.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0758414,42.3241176]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p73R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"717.0,1957.6 992.1,2063.7 1013.9,2032.6 1385.3,2015.5 1433.2,1344.3 1406.0,1343.6 1365.4,894.9 1324.0,866.0 1358.8,751.4 1436.0,286.5 1436.0,182.1 1436.0,176.4 1375.6,164.2 1297.6,148.4 1153.5,131.6 794.5,125.0 629.8,135.7 365.5,127.8 272.3,121.3 113.8,113.9 87.3,111.7 40.5,107.6 45.3,592.1 37.1,594.1 40.1,871.0 1.0,887.2 1.0,1146.5 57.2,1252.0 56.7,1364.8 68.4,1359.5 106.0,1342.6 288.9,1685.0 355.1,1769.3 463.0,1893.8 604.1,2066.0 628.8,2066.0 699.9,2066.0 717.0,1957.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[648.0,1059.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07537425419369,42.322393641527356]}},{"type":"Feature","properties":{"resourceCoords":[739.0,1445.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07601236804875,42.321865897574725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074L__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 | 1888 | sanborn03693_004 p74L [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5748.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074L__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074L","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1386.7,1678.2 1386.7,1653.1 1436.0,1598.6 1436.0,1586.7 1430.8,1529.6 1428.3,974.0 1404.6,982.0 1398.6,461.2 1328.2,485.4 1060.9,588.7 732.3,729.9 648.8,677.5 464.0,551.5 413.6,510.5 230.1,871.9 107.2,1139.5 68.2,1220.7 38.9,1281.7 1.0,1353.1 1.0,1355.6 37.5,1383.5 225.3,1468.3 284.8,1495.2 307.6,1505.5 277.2,1550.1 545.9,1973.5 380.6,1900.1 370.3,1905.8 492.7,2066.0 790.5,2066.0 890.5,2035.6 920.2,2066.0 993.5,2066.0 1251.9,1794.8 1393.3,1777.7 1386.7,1678.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074L__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[118.0,1113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08089092335534,42.32850017929337]}},{"type":"Feature","properties":{"resourceCoords":[417.0,495.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07924254591398,42.32853765002615]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p74R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"616.3,1939.4 836.1,1862.6 1137.1,1761.7 1119.0,1679.1 960.0,1234.2 795.9,713.2 906.9,674.5 1078.3,622.1 1290.5,541.8 1325.3,493.0 1413.2,15.1 1331.5,15.3 1315.8,15.3 1083.2,97.8 403.6,325.1 24.2,453.8 24.8,973.1 48.5,965.2 45.3,1519.3 50.8,1587.0 1.0,1641.5 1.0,1761.9 255.1,2027.2 265.2,2053.9 616.3,1939.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0074R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07714238380301,42.32744003104744]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07551982988613,42.32516773937997]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0799097304545,42.323430034797]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08153228437138,42.325702326464466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p75L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075L","type":"ImageService3","width":1435,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.2,333.8 233.1,302.6 624.4,203.0 768.7,163.4 1180.8,62.4 1287.7,46.5 1365.3,51.9 1413.5,62.0 1411.8,1668.8 1356.6,1694.4 1356.2,1774.4 1172.7,1858.8 1081.7,1900.8 988.1,1775.3 946.5,1762.3 670.4,1703.4 465.2,1651.8 356.8,1620.2 308.4,1655.7 306.4,1592.4 240.6,1559.3 131.7,1478.8 44.1,1455.2 119.2,333.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[357.0,1629.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08480339338591,42.32509915291272]}},{"type":"Feature","properties":{"resourceCoords":[988.0,671.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08595630351799,42.32697926365608]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p75R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.3,1762.3 76.5,1801.1 274.5,1848.3 424.5,1912.2 336.2,2066.0 465.0,1843.7 665.0,1817.3 665.0,1829.0 518.8,1936.0 1020.4,1913.7 1044.0,1962.3 1064.3,1947.7 1284.6,1788.6 1328.1,1770.2 1113.2,1309.1 1010.5,1109.2 967.3,1051.6 1036.0,1003.7 1332.2,864.2 1124.8,355.6 1079.0,364.4 869.0,402.1 811.3,403.3 739.2,387.2 563.3,309.7 245.3,133.4 112.4,73.1 91.8,64.2 48.2,55.1 55.8,1685.3 1.0,1711.2 1.0,1792.4 65.3,1762.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1016.0,1957.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08156263824745,42.327842183054436]}},{"type":"Feature","properties":{"resourceCoords":[1279.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08153433983091,42.328382301916164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p76L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076L","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.7,1317.7 134.3,1173.7 199.0,962.6 339.4,511.9 400.4,327.6 490.8,353.8 661.2,352.7 941.8,300.1 1085.8,328.0 1281.2,386.9 1371.7,146.6 1383.3,120.0 1404.0,89.2 1399.0,424.8 1432.6,435.6 1426.5,1522.5 1413.7,1513.4 1327.3,1475.5 1251.3,1454.1 1141.9,1447.9 712.0,1463.4 560.5,1473.1 151.7,1491.5 128.7,1317.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[721.0,1468.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08726825095754,42.32714490736988]}},{"type":"Feature","properties":{"resourceCoords":[673.0,373.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08977040024737,42.327746841655866]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p76R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076R","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.2,450.8 44.5,1558.2 50.0,1562.1 170.3,1649.2 451.6,1889.3 611.2,2002.2 679.6,2032.8 737.2,2043.3 953.3,2048.1 1018.1,2048.8 1039.0,2049.4 1032.4,2005.9 986.9,1917.0 862.2,1747.7 773.4,1640.5 819.2,1498.7 896.2,1207.1 949.5,1010.8 983.8,1021.0 995.3,437.7 1009.3,389.1 918.9,376.5 887.2,357.4 849.6,305.1 796.1,205.1 512.2,282.7 282.6,351.9 261.9,231.0 212.0,1.0 63.0,1.0 1.0,96.7 1.0,440.4 34.2,450.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09000835384262,42.32920086851065]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08878037280374,42.33155152338155]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08424508852045,42.33023830975362]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08547306955933,42.327887654882716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p77L","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077L","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"253.7,896.9 231.7,788.1 449.6,745.0 512.6,747.6 1011.6,127.2 1146.5,248.8 1329.8,425.0 1403.4,509.6 1431.0,538.7 1431.0,787.6 1411.7,789.3 1403.9,1541.0 1424.8,1572.7 1372.0,1822.9 1170.9,1794.3 1025.0,1788.5 756.9,1882.6 589.3,1909.4 496.4,1897.3 418.0,1883.6 204.2,1827.0 145.0,1815.8 163.4,1668.8 176.8,1468.8 185.0,1252.8 166.0,917.0 253.7,896.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[166.0,917.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0925539,42.3276618]}},{"type":"Feature","properties":{"resourceCoords":[518.0,852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.092276,42.328266]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p77R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.31"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"219.4,552.7 221.8,513.7 171.4,401.4 711.8,61.6 803.5,53.7 1026.9,411.6 1040.5,863.4 1178.0,1466.2 1136.6,1711.2 1042.8,1708.8 1008.2,1693.0 963.8,1643.8 897.6,1547.8 616.4,1659.8 389.8,1757.0 354.7,1635.8 276.8,1405.5 125.4,1422.6 54.5,1565.0 24.8,1560.1 52.0,770.0 72.3,768.8 78.7,507.1 146.2,582.6 219.4,552.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0077R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09297148672579,42.33024203202677]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09144299483009,42.3324108499016]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08725266193434,42.33077401410221]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08878115383004,42.32860519622738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p78L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078L","type":"ImageService3","width":1431,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.8,1305.8 343.2,1025.2 388.3,843.2 416.4,813.5 617.0,259.5 636.2,207.6 708.6,13.9 758.8,13.6 768.4,13.6 1164.0,180.1 1245.1,211.1 1356.0,264.0 1397.5,198.6 1384.4,901.9 1403.0,903.0 1430.0,904.5 1430.0,907.8 1430.0,1090.2 1380.6,1171.2 1385.8,1387.8 1012.8,1844.0 1000.6,1875.2 950.3,1851.2 955.5,1837.7 535.2,1739.7 528.9,1754.0 139.9,1590.2 256.9,1466.6 299.8,1305.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[521.0,1768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0971042393917,42.33010590405032]}},{"type":"Feature","properties":{"resourceCoords":[385.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09715335477553,42.33181446473411]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p78R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.40"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1307.2,1631.8 1199.8,1665.0 963.9,1761.7 797.7,1836.0 588.8,1932.8 517.8,1974.2 199.7,1532.3 15.4,1426.1 50.2,1386.0 50.9,1168.5 103.0,1088.3 108.0,940.5 134.0,904.0 80.8,899.6 62.1,898.0 86.8,361.6 409.9,487.8 396.6,505.2 669.2,305.6 992.6,17.5 1028.3,17.4 966.0,81.7 975.4,179.3 1206.5,361.6 1206.1,815.9 1180.0,899.6 1285.3,1498.4 1402.5,1494.4 1436.0,1510.5 1436.0,1560.8 1436.0,1585.9 1307.2,1631.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09470577336612,42.33307194292755]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09126777068634,42.33282588338144]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09174318263766,42.329144222769905]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09518118531744,42.32939028231602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p79L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079L","type":"ImageService3","width":1424,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"212.8,1498.2 498.1,1546.9 639.0,1574.5 893.8,1632.9 1227.6,1718.8 1299.0,1741.0 1354.5,1756.9 1370.2,1761.0 1372.3,1687.3 1410.7,1698.2 1411.5,1211.8 1407.8,1210.7 1393.3,954.0 1405.0,544.1 1219.8,564.2 1084.8,240.7 619.8,275.7 642.0,1.0 599.1,1.0 492.8,611.8 481.4,667.6 407.5,669.4 276.6,650.7 234.8,630.3 135.7,546.9 70.3,478.8 61.7,483.9 78.1,576.1 97.3,999.7 109.2,1027.7 125.8,1429.2 142.0,1486.3 212.8,1498.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1011.0,700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09944272198173,42.3280115211856]}},{"type":"Feature","properties":{"resourceCoords":[125.0,1024.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09890127458091,42.326394699976554]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p79R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.6,1803.8 405.8,1879.2 754.0,1996.4 814.0,2019.1 837.5,1967.4 851.4,1972.5 944.7,1542.0 930.1,1535.8 1090.7,1136.4 1217.8,1254.3 1326.6,943.2 1436.0,619.6 1436.0,281.7 1390.8,287.9 1362.2,191.2 1127.2,45.3 378.3,131.9 354.1,235.8 157.7,316.8 110.2,532.1 1.0,547.0 1.0,970.1 21.7,1215.5 25.4,1216.7 38.5,1704.5 1.0,1694.8 1.0,1768.8 150.6,1803.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1010018552062,42.328863804010204]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10053977416948,42.331386768542465]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09566525683496,42.330891928211095]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09612733787169,42.328368963678834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p80L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080L","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"258.0,319.9 220.2,79.1 313.7,83.0 598.4,95.8 739.2,105.5 995.2,131.4 1331.7,174.6 1397.9,186.4 1412.9,575.9 1407.7,575.3 1389.7,801.5 1375.4,799.0 1429.0,1764.7 1429.0,2010.1 1233.3,1987.8 1030.8,1970.1 722.7,1948.9 616.2,1959.4 376.5,1998.3 208.3,2020.0 16.0,2056.0 16.0,2049.0 6.3,2046.6 40.1,1921.7 118.1,1709.0 223.8,1435.3 353.3,1109.0 395.0,1002.9 426.1,615.7 306.1,603.9 258.0,319.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1141.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09575587948947,42.32763442738273]}},{"type":"Feature","properties":{"resourceCoords":[773.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09596144850943,42.32699197311192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p80R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080R","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"69.9,1763.5 1.7,803.6 15.8,805.9 30.1,580.8 35.2,581.2 14.2,194.0 20.4,195.0 76.1,203.0 241.7,222.8 497.4,268.3 847.9,344.4 940.7,368.1 1391.2,653.5 1315.1,848.8 931.5,1224.2 982.4,1287.3 1107.7,1476.6 476.1,1939.0 417.0,1920.2 199.2,1904.8 192.4,2014.2 104.2,2010.7 73.8,2007.7 69.9,1763.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09737028691973,42.3283696362317]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09650950194825,42.3309152027031]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09162202873168,42.32999911069386]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09248281370316,42.32745354422246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081L__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p81L [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5756.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081L__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081L","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"671.5,1202.4 1348.0,1475.5 1406.3,1499.6 1393.8,922.9 1407.8,907.1 1427.3,38.1 1285.5,46.4 1286.3,39.4 1276.9,35.6 1272.2,47.2 918.1,79.2 577.9,121.2 634.5,404.3 649.3,441.6 337.4,633.4 297.9,651.8 272.9,758.0 245.5,803.5 171.7,891.5 390.7,1071.8 505.2,1140.2 671.5,1202.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081L__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0936932631456,42.32286537467849]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0933315857981,42.32540353752997]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08843484222535,42.325016731891765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08879651957285,42.322478569040285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p81R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081R","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"22.0,1491.2 10.6,916.3 24.7,900.6 45.9,34.5 101.4,31.4 272.3,31.6 517.0,23.8 624.9,27.1 930.3,88.8 1130.5,133.1 1353.5,188.7 1238.2,507.4 1145.1,704.2 1053.7,884.2 978.6,1013.0 1028.6,1047.0 1203.0,1185.0 1269.8,1228.9 1164.8,1392.5 916.2,1794.9 677.4,1622.5 457.8,1488.8 390.4,1482.0 351.5,1498.7 273.8,1555.5 224.6,1571.2 67.7,1510.2 22.0,1491.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0081R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09333748900559,42.32530102665783]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09297968694347,42.3278602929809]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08806613149481,42.32747948431129]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08842393355694,42.32492021798822]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p82L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082L","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1406.5,2008.1 863.5,1796.6 815.8,1791.5 728.4,1822.3 506.2,1813.2 271.0,1816.3 245.6,1088.2 242.7,975.8 234.2,807.4 199.9,768.6 116.5,720.3 85.4,691.3 64.2,626.8 96.5,371.5 156.2,83.0 375.1,112.7 518.2,94.8 686.1,43.9 713.0,160.7 1425.9,238.2 1414.3,781.9 1400.9,767.6 1411.0,1418.5 1442.0,1417.1 1442.0,1611.2 1442.0,1622.0 1414.3,1622.8 1420.3,2013.3 1406.5,2008.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0906501810891,42.32383306471587]}},{"type":"Feature","properties":{"resourceCoords":[567.0,1252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08938603246611,42.32443132398843]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p82R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082R","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1428.2,806.1 1349.1,767.1 1342.5,605.1 1347.0,492.7 1249.2,473.8 1181.7,479.4 1088.5,549.0 1043.2,592.5 1014.5,606.7 914.6,434.7 680.3,19.0 669.0,19.0 664.0,13.0 664.0,1.0 603.5,1.0 568.5,65.4 483.5,172.9 456.8,260.7 36.7,218.8 29.9,761.0 16.4,746.9 32.2,1395.7 63.1,1394.1 64.9,1598.3 37.2,1599.4 46.8,1988.7 159.8,2029.8 190.7,2035.8 503.1,2015.7 1248.8,1977.3 1409.4,1965.3 1445.0,1964.8 1445.0,769.6 1428.2,806.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1746.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0880276080944,42.322793527105404]}},{"type":"Feature","properties":{"resourceCoords":[1376.0,1744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08546401921355,42.32168667546464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p83L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083L","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"313.8,1637.4 366.1,1667.9 362.4,1669.7 385.2,1679.8 774.1,1953.9 937.6,2066.0 957.6,2040.8 980.0,1981.8 1034.6,1878.6 1093.2,1844.2 1189.7,1819.0 1233.5,1922.5 1308.5,2066.0 1396.6,2066.0 1390.3,1339.1 1339.7,1320.0 1339.7,1258.2 1322.3,1251.5 1345.4,1226.7 1372.5,1157.5 1411.2,259.7 1075.7,330.1 1068.5,302.4 847.7,15.2 705.6,16.3 417.6,256.9 345.0,248.7 319.1,215.2 213.1,234.8 176.6,230.7 175.5,230.6 1.0,210.9 1.0,379.5 33.9,573.8 2.7,599.5 208.1,783.0 283.6,850.4 204.6,988.4 209.2,1032.3 265.2,1312.5 299.6,1524.0 313.8,1637.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08199951646782,42.327212214924145]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0800737000218,42.32510229937812]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08416980864104,42.32302969039118]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08609562508705,42.3251396059372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p83R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083R","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1235.0,1650.8 1242.3,1644.6 1210.3,1607.5 1217.7,1182.4 1216.8,1068.4 1249.8,973.5 1247.4,899.2 1156.9,507.2 1096.5,256.6 1037.7,107.1 995.5,18.0 909.2,18.0 902.8,18.0 806.8,61.0 629.2,138.8 321.4,204.4 96.3,255.4 69.2,261.0 32.3,1146.5 5.6,1214.7 1.0,1240.2 1.0,1307.1 50.1,1325.9 57.0,2002.0 87.3,2066.0 1380.0,2066.0 1381.0,2046.0 1426.0,2046.0 1445.0,2041.0 1445.0,1988.8 1269.1,1998.5 1318.2,1803.1 1445.0,1856.2 1445.0,1782.1 1300.8,1724.3 1235.0,1650.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1225.0,1661.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08184330499766,42.321731772327595]}},{"type":"Feature","properties":{"resourceCoords":[1225.0,1194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08090435384575,42.322205335435676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0084L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p84L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0084L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0084L","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1081.6,71.3 635.9,139.2 377.4,68.3 52.0,203.3 44.8,1357.4 92.2,1378.4 159.6,1957.1 1.0,1916.3 1.0,1944.5 2.2,1978.5 693.1,2064.7 694.0,2057.0 710.0,2055.0 735.0,2057.0 738.5,2057.0 739.0,2055.0 764.0,2055.0 764.4,2057.0 775.8,2057.0 776.0,2055.0 942.0,2057.0 988.4,2050.3 1362.0,1939.8 1357.5,1841.5 1436.0,1769.8 1436.0,163.4 1361.8,127.1 1219.6,95.0 1125.1,97.8 1106.7,1.0 1061.4,1.0 1081.6,71.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0084L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08648263388625,42.318615796152066]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08619905259255,42.321149244933466]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0813049942118,42.32084551473123]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08158857550549,42.31831206594983]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p85L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085L","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"874.9,113.3 894.2,207.7 547.2,372.7 503.1,386.4 261.6,424.9 261.9,432.5 408.1,427.4 375.0,436.3 266.6,852.5 193.7,1062.7 108.8,1334.0 78.7,1456.8 1.0,1764.2 1.0,1992.0 854.4,2041.3 1330.5,2025.0 1389.2,1971.5 1398.6,1783.5 1380.9,1278.1 1432.0,1126.1 1432.0,981.0 1432.0,889.6 1396.3,869.4 1414.6,1.0 1313.6,1.0 1175.8,68.9 1120.5,19.2 1159.0,1.0 964.9,1.0 874.9,113.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1114.0,1784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07778028316964,42.320440538777056]}},{"type":"Feature","properties":{"resourceCoords":[1130.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08027295919383,42.32092267143532]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p85R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085R","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.1,1.0 36.9,1.0 39.5,864.2 75.6,883.8 81.3,1121.4 33.9,1275.1 63.6,1782.6 58.8,1971.6 69.4,1961.3 97.6,2066.0 137.7,2066.0 359.1,1943.2 287.4,1860.2 348.5,1787.0 569.8,1790.0 733.5,1787.5 839.9,1791.2 1217.7,1871.8 1228.8,1832.1 1262.7,1708.6 1436.0,1045.2 1436.0,976.6 1436.0,881.4 1341.3,855.2 1189.1,801.7 958.9,683.0 601.4,494.2 543.2,447.3 492.4,359.6 405.0,285.3 87.1,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0818097481786,42.32165864995478]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08090829935256,42.32415146337447]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07609259960805,42.32318599318823]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07699404843409,42.32069317976854]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p86L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086L","type":"ImageService3","width":1429,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"616.9,2022.7 614.5,1982.7 842.4,1944.8 955.0,1931.7 1346.2,1897.3 1413.3,1891.5 1418.8,1450.9 1421.6,984.5 1428.0,986.6 1428.0,984.8 1428.0,920.7 1417.5,464.0 1415.2,463.5 1414.9,30.2 1304.8,31.8 1017.5,17.8 805.7,1.0 349.9,1.0 581.3,777.6 525.5,804.4 498.8,642.2 1.0,932.8 1.0,984.7 37.3,969.1 86.8,1989.2 616.9,2022.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[671.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08213776160298,42.31752927097872]}},{"type":"Feature","properties":{"resourceCoords":[1349.0,1946.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0815104749942,42.315860251892886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p86R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1277.9,2009.3 1335.7,2016.0 1404.2,1968.4 1333.6,1524.5 1405.0,1338.7 1377.5,957.2 1265.8,785.9 1292.3,581.6 1344.4,518.5 1278.7,115.0 1018.0,51.5 749.5,147.5 684.6,45.3 588.9,29.0 583.1,1.0 443.1,1.0 357.3,24.2 33.1,29.9 15.2,30.4 17.6,461.0 19.8,461.5 32.3,915.3 26.2,978.7 25.5,1442.3 22.1,1880.3 84.0,1874.3 136.3,1874.2 829.7,1968.5 1006.6,1988.5 1277.9,2009.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0791850249333,42.318852300124924]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07617593974362,42.31761936015639]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07856589306432,42.31438504814749]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.081574978254,42.315617988116024]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p87L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087L","type":"ImageService3","width":1431,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.5,216.7 207.0,62.5 813.4,15.6 1367.5,34.3 1423.1,87.2 1430.0,134.0 1430.0,340.1 1408.5,352.7 1404.5,815.7 1414.8,833.9 1415.0,1594.3 1404.6,1596.3 1403.6,1938.7 1243.9,2039.3 398.9,1963.4 215.0,2048.3 217.4,2066.0 182.5,2052.8 223.6,1603.5 238.4,1499.0 194.0,1222.1 99.6,1233.7 108.8,458.1 76.0,440.1 71.5,216.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08591788339913,42.31193879312679]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.084469322845,42.3142745532509]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07993878329141,42.31271637673693]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08138734384553,42.31038061661283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p87R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.1,99.4 327.3,25.1 609.4,157.4 1134.8,127.3 1309.2,62.8 1314.2,20.6 1337.1,20.7 1353.3,20.8 1377.3,245.9 1383.8,356.8 1395.1,741.3 1398.8,868.3 1395.4,919.5 1256.7,1592.0 1225.3,1764.0 1186.9,2028.1 1179.8,2066.0 1145.2,2032.1 338.7,2019.9 62.9,1901.1 24.6,1925.3 24.9,1587.1 35.1,1585.0 33.3,833.9 23.1,816.0 26.0,358.6 47.2,346.1 46.7,142.6 39.8,96.3 43.1,99.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0087R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08454069390976,42.31420407091545]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08306611866841,42.31656785011757]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07848437311549,42.31498281899135]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07995894835683,42.31261903978923]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p88L","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088L","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1392.3,264.0 1416.4,268.1 1396.5,703.2 1403.2,704.5 1395.8,1261.9 1433.0,1261.8 1433.0,1320.5 1401.1,1321.3 1382.0,2037.7 385.9,2026.2 70.3,1782.7 17.2,696.8 66.2,47.9 243.0,27.1 803.9,146.5 1290.8,27.2 1433.0,120.1 1392.3,264.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1156.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0832692,42.3084647]}},{"type":"Feature","properties":{"resourceCoords":[289.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086603,42.307677]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p88R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,134.7 39.8,130.4 40.9,131.1 743.5,47.2 1166.0,90.5 1257.0,56.7 1259.0,20.2 1291.4,20.4 1223.5,789.2 1318.0,784.9 1341.1,1063.0 1318.5,1165.5 1243.7,1608.3 1241.5,1621.3 1277.3,1624.0 1277.4,1625.0 1282.4,1708.4 978.9,1877.5 549.5,2029.4 42.0,2035.4 41.3,1323.7 72.8,1322.2 71.2,1263.9 34.4,1264.8 26.5,711.3 19.8,710.2 27.5,277.8 3.6,274.2 40.0,134.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0088R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08594313813406,42.30959732193098]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0847309270332,42.3120220051439]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08003144610073,42.31071890351433]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08124365720158,42.3082942203014]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p89L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089L","type":"ImageService3","width":1438,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"16.9,1875.4 1.0,2004.2 1.0,2046.1 13.0,2047.0 13.0,2063.0 5.2,2064.8 487.5,2041.8 898.0,1802.2 1106.3,1843.5 1377.1,2006.7 1424.7,1950.5 1433.2,1953.6 1430.6,1350.1 1409.2,1352.1 1390.9,216.0 1336.3,202.6 780.0,58.4 732.8,58.9 650.8,99.2 432.1,116.0 202.2,146.4 233.3,318.5 233.0,449.6 190.8,725.2 150.2,718.3 160.4,976.1 97.0,1350.6 45.6,1701.8 16.9,1875.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[446.0,1712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09247191956888,42.32130275787132]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,1802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.09131952929933,42.32046788028874]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089R__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 | 1888 | sanborn03693_004 p89R [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5728.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089R__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.2,1988.5 170.9,2030.5 623.5,2031.7 680.1,2007.2 696.4,1874.6 696.5,1868.2 698.6,1733.0 698.7,1732.9 698.7,1732.9 717.9,1698.2 1166.8,1113.6 1327.9,1065.7 1238.3,676.0 1367.5,530.0 1353.0,507.2 1343.7,492.8 1414.3,426.2 1362.5,350.0 1314.4,216.2 1305.3,135.1 1422.0,60.6 1422.0,21.0 1259.7,20.3 1133.5,45.6 408.6,173.6 105.4,231.1 74.5,229.1 1.0,212.2 1.0,254.0 27.1,1340.9 48.4,1338.6 55.9,1938.4 47.4,1935.5 54.2,1988.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0089R__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08814232957695,42.32275456562657]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08536590493281,42.321180917974125]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08841645188612,42.318196837078894]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09119287653026,42.319770484731336]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p90L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090L","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"426.2,1417.9 246.1,1379.8 182.4,1358.0 124.5,1308.8 160.1,1271.2 184.3,1210.8 187.2,1134.1 177.1,925.5 168.6,833.0 144.3,682.6 106.5,537.7 63.0,397.5 27.5,281.7 399.8,158.0 514.8,154.8 868.7,146.3 1164.5,136.2 1387.7,125.0 1407.0,795.3 1388.2,796.0 1436.0,1442.6 1434.1,1472.9 1426.3,1467.1 1405.6,1818.9 1267.9,1937.0 927.2,1999.0 551.8,1768.6 445.2,1790.3 314.2,1723.2 426.2,1417.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09608641007601,42.3268702379365]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09330142764514,42.325354838839154]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09622901618788,42.32237215746558]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09901399861873,42.32388755656292]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p90R","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.49"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.2,1450.7 84.7,1456.8 88.7,1453.7 61.0,782.5 79.7,782.5 82.1,116.0 87.1,115.9 228.1,101.9 420.6,396.0 615.5,673.4 834.6,493.4 860.0,463.3 1171.5,646.9 1205.8,672.9 1309.5,645.7 1361.8,648.6 1431.0,663.5 1431.0,922.5 1351.0,1294.9 1284.2,1644.5 1247.8,1817.1 1215.9,2006.5 498.1,2009.2 241.8,1765.0 129.0,1732.4 45.3,1799.3 77.2,1450.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0090R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0935812,42.3254813]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0907045,42.3240408]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0935169,42.3209708]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0963936,42.3224113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0091R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p91R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0091R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0091R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6.0,1581.0 222.6,1827.8 343.4,1686.5 393.4,1640.5 465.0,1612.9 481.1,1662.6 523.0,1713.3 589.6,1752.8 779.5,1844.7 865.6,1881.7 1010.7,1932.9 1157.4,1969.3 1302.7,1998.5 1282.6,1705.2 1268.6,1456.8 1291.7,1460.2 1274.1,1403.2 1247.3,1000.5 1234.8,972.6 1204.8,547.9 1186.2,455.6 1123.4,467.2 1086.2,445.4 1023.6,442.7 957.3,460.7 902.2,516.4 814.7,427.6 768.0,404.4 471.2,345.6 390.2,330.0 321.5,316.9 334.7,298.9 1.0,282.1 1.0,282.2 54.3,294.9 38.2,1559.0 6.0,1581.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0091R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10164600006361,42.32441135239689]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10119649556776,42.32692413690918]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09632512230614,42.32644104162761]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09677462680199,42.32392825711533]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p92L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.48"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092L","type":"ImageService3","width":1429,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.9,679.5 161.9,270.0 822.9,287.6 1199.4,200.7 1384.6,82.3 1391.4,301.9 1400.8,298.1 1368.5,754.3 1366.6,753.5 1396.4,1732.6 1360.3,1791.6 1344.2,1816.1 971.0,1818.6 348.0,1761.5 345.6,1822.7 191.5,1823.7 170.4,1620.9 134.4,1362.4 96.3,1350.2 35.9,679.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[207.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10131166634035,42.322892789488556]}},{"type":"Feature","properties":{"resourceCoords":[140.0,1358.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1024961858904,42.322935859807636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p92R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.7,45.8 266.2,33.5 419.6,148.4 864.5,80.7 1371.7,131.2 1389.0,1385.8 1347.2,1389.8 1300.0,2000.7 1294.2,2056.5 1222.1,2065.1 1092.6,2058.5 1050.0,2042.2 945.4,1969.3 875.3,1908.2 867.4,1914.0 806.6,1929.7 768.6,1910.8 707.1,1912.4 643.3,1934.5 593.0,1992.8 501.2,1911.7 453.9,1892.2 158.9,1854.5 10.1,1836.5 37.8,1792.9 73.3,1732.6 29.2,738.8 31.1,739.6 57.1,276.0 47.8,279.9 37.7,57.0 54.7,45.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10515592572217,42.32554490061501]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10446339271031,42.32807187118662]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09956434649408,42.32732761227177]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10025687950593,42.32480064170016]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p93L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093L","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1429.0,63.2 1429.0,234.0 1429.0,378.8 1407.9,377.2 1402.6,737.8 1419.5,738.8 1405.8,1840.9 1429.0,1865.8 1429.0,2029.7 1117.0,1966.0 1097.6,1898.1 962.5,1857.9 319.6,1909.8 222.7,1779.2 4.8,1916.7 26.1,1669.2 8.4,1664.3 69.5,664.7 75.3,546.0 96.2,531.6 90.3,37.9 727.7,24.0 942.2,82.1 1283.1,19.6 1415.5,43.1 1429.0,63.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[320.0,484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1038997002794,42.31922584682615]}},{"type":"Feature","properties":{"resourceCoords":[588.0,694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10315631014431,42.31946463945368]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p93R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"50.1,745.3 33.6,744.4 35.6,389.4 56.4,390.9 53.6,80.2 40.2,60.5 421.7,127.5 1016.1,25.1 1013.9,19.9 1016.0,20.0 1054.4,19.8 1170.5,258.6 1254.8,448.2 1402.7,399.4 1413.2,436.4 1311.6,500.9 1390.0,768.2 1315.8,1007.2 1382.2,1393.2 1317.0,1523.8 1349.0,1644.2 1264.0,1785.8 1115.7,1858.6 636.8,1828.5 120.3,2025.9 71.8,2016.2 69.3,1854.6 46.4,1830.2 50.1,745.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10375560247337,42.321280095931996]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10209111408636,42.323536583000426]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09771680382602,42.32174762991133]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09938129221302,42.3194911428429]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p94L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.48"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094L","type":"ImageService3","width":1428,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1380.0,116.0 1323.7,43.6 1145.6,23.3 590.2,96.4 111.1,36.0 24.7,155.8 54.1,162.4 64.5,573.1 41.0,572.9 20.9,760.2 29.4,798.1 12.6,837.8 1.0,945.5 1.0,1644.4 93.0,1648.2 82.8,1915.9 179.6,1851.8 349.1,1914.5 349.2,1969.8 1332.8,2018.4 1383.6,1929.5 1404.1,1924.3 1427.0,1867.5 1427.0,1750.6 1345.5,1712.5 1346.3,1389.0 1427.0,1256.4 1427.0,1071.7 1427.0,1032.5 1381.2,1031.7 1380.0,116.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10770100508736,42.31481222141657]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10582787684393,42.31691805228371]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10173460650054,42.31489901141903]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10360773474396,42.31279318055188]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p94R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094R","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.0,122.2 33.5,1022.6 78.7,1023.0 79.2,1243.2 1.0,1372.8 1.0,1693.0 80.5,1729.3 80.8,1844.3 58.4,1900.2 215.8,1859.1 738.9,2043.7 1380.6,2039.8 1347.5,1435.7 1416.0,1382.8 1413.9,1138.6 1396.1,1135.4 1363.0,151.1 1357.8,34.4 1324.7,62.3 66.2,26.1 36.7,97.6 5.3,90.9 30.0,122.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[997.0,1761.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10106280097463,42.31653724579373]}},{"type":"Feature","properties":{"resourceCoords":[340.0,1303.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10286944379304,42.31601734314108]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p95L","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.10"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095L","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.4,169.4 85.8,422.9 20.9,1181.2 45.5,1839.0 51.5,1875.9 554.5,1942.3 509.1,1955.0 113.2,2066.0 139.5,2066.0 1053.7,1901.0 1017.9,1812.5 1433.0,1696.0 1433.0,234.6 1391.3,1.0 808.1,1.0 737.5,16.2 627.7,27.8 587.9,20.2 554.9,35.5 379.0,54.0 374.4,32.4 1.0,122.9 1.0,151.8 41.4,169.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[450.0,392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.107003,42.3137757]}},{"type":"Feature","properties":{"resourceCoords":[392.0,116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1066027,42.3142146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p95R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095R","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,604.3 1.0,1928.4 1180.0,1804.8 1277.7,1779.5 1303.9,1622.8 1297.0,1472.1 1194.5,1316.8 1207.6,886.2 1286.6,829.4 1205.9,704.3 1172.1,170.1 1059.2,77.3 312.5,65.0 276.6,15.0 31.0,15.0 30.1,1.0 4.7,1.0 2.7,604.1 1.0,604.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1043241965097,42.313344433598274]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1014715396403,42.31181632546431]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10441287865983,42.30877117349228]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10726553552922,42.31029928162625]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p96L","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096L/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096L","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"168.6,136.5 212.7,385.9 221.5,386.4 311.9,878.3 366.0,896.2 404.1,983.4 381.3,1194.1 335.6,1544.5 323.2,1707.8 330.4,1850.5 290.6,1853.0 304.7,1873.4 413.0,2030.6 1229.2,2009.0 1392.9,1924.0 1398.0,383.3 1432.0,380.5 1432.0,78.2 1428.8,78.2 1323.4,79.5 1335.1,61.7 1334.3,16.3 1336.9,1.0 1195.8,1.0 1173.9,81.5 718.2,85.3 730.2,185.2 168.6,136.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1164.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10894173091776,42.30915559693401]}},{"type":"Feature","properties":{"resourceCoords":[425.0,894.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11018708535585,42.31018186972791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p96R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096R","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"26.2,1909.8 50.6,1896.9 155.2,2002.6 1208.7,2016.8 1333.2,1988.9 1372.0,1888.2 1363.0,1413.7 1302.7,1430.9 1241.7,1064.7 1293.6,206.5 1395.5,139.3 1420.9,46.8 1319.4,62.2 112.2,64.8 117.3,15.0 36.0,15.0 1.0,2.2 1.0,65.0 93.8,64.8 97.0,64.8 91.8,367.1 57.6,369.5 26.2,1909.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10722428640247,42.31070320577902]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10422910278788,42.30942240027769]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10669430131811,42.306224939926594]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1096894849327,42.307505745427925]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__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 | 1888 | sanborn03693_004 p97L [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3795.2"},{"label":"split_canvas_w","value":"2458.0"},{"label":"split_canvas_h","value":"4472.8"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L","type":"ImageService3","width":1431,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"186.9,2000.4 588.7,1943.1 595.0,1384.0 515.5,1189.9 321.4,969.1 40.6,973.2 22.6,1428.3 123.3,1550.0 81.7,1835.0 186.9,2000.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,948.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0987692034632,42.3158020521229]}},{"type":"Feature","properties":{"resourceCoords":[614.5,948.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09758449536209,42.31513989273188]}},{"type":"Feature","properties":{"resourceCoords":[614.5,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09920238873092,42.31353467500364]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10038709683204,42.31419683439466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p97L [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5724.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L","type":"ImageService3","width":1431,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1378.2,46.6 1372.7,35.5 554.3,26.4 135.1,94.0 51.4,177.9 42.0,929.1 313.7,952.3 629.3,1213.5 640.1,1988.2 703.9,2031.8 1166.7,2034.6 1346.2,2015.5 1347.0,1916.3 1391.6,1896.1 1392.8,1354.2 1386.2,1356.9 1396.5,697.6 1387.0,700.0 1387.8,463.7 1400.0,254.3 1367.5,255.1 1378.2,46.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097L__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[196.0,333.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11485565794291,42.3135092021877]}},{"type":"Feature","properties":{"resourceCoords":[1245.0,307.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11254605836724,42.31270532500467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1888 | sanborn03693_004 p97R","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:03:56Z","modified":"2026-10-24T15:03:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097R/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097R","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"25.2,1985.2 59.9,1993.0 82.2,2028.8 131.9,1978.1 299.8,2026.8 751.0,1939.0 1132.7,1945.6 1193.0,2046.0 1211.5,2046.0 1232.3,2046.0 1234.1,1904.9 1256.3,1744.6 1323.1,1402.0 1358.6,1195.6 1326.4,1107.3 1274.2,1086.3 1215.4,595.8 1206.8,594.7 1178.7,346.1 1174.2,299.6 1223.2,302.3 749.5,68.2 747.6,57.6 104.5,33.3 48.2,104.1 16.4,41.8 7.3,249.9 39.6,248.9 29.2,458.1 30.2,693.9 39.6,691.5 34.6,1349.6 41.2,1346.9 44.4,1887.8 1.0,1907.8 1.0,2006.5 25.2,1985.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[605.0,523.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1112290061685,42.3117615548265]}},{"type":"Feature","properties":{"resourceCoords":[1788.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10883849820446,42.31053584366116]}}]}}]}