{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03693_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boston, Massachusetts | 1888 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"91"},{"label":"placed","value":"46"},{"label":"unplaced","value":"45"},{"label":"fit sources","value":"georef-snap 27, georef 10, georef-street 7, snap:0 6"},{"label":"key map","value":"none"},{"label":"split sheets","value":"9 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p0L__1 (tier 4, 42.32361,-71.08657 +/-11061m); p0L__2 (tier 4, 42.32361,-71.08657 +/-11061m); p0R (tier 4, 42.32361,-71.08657 +/-11061m); p100L__1 (tier 4, 42.32361,-71.08657 +/-11061m); p100L__2 (tier 4, 42.32361,-71.08657 +/-11061m); p100L__3 (tier 4, 42.32361,-71.08657 +/-11061m); p100R__1 (tier 4, 42.32361,-71.08657 +/-11061m); p100R__2 (tier 4, 42.32361,-71.08657 +/-11061m); p62R (tier 4, 42.32361,-71.08657 +/-11061m); p63R (tier 4, 42.32361,-71.08657 +/-11061m); p65R (tier 4, 42.32361,-71.08657 +/-11061m); p66L (tier 1, 42.34021,-71.08129 +/-249m); p66R (tier 1, 42.36946,-71.03877 +/-248m); p67L (tier 1, 42.33434,-71.08009 +/-242m); p68R (tier 4, 42.32361,-71.08657 +/-11061m); p70R (tier 1, 42.39079,-71.03291 +/-278m); p71R (tier 4, 42.32361,-71.08657 +/-11061m); p74L__2 (tier 4, 42.32361,-71.08657 +/-11061m); p76R (tier 1, 42.32972,-71.08713 +/-244m); p77R (tier 1, 42.32953,-71.08724 +/-235m); p79R (tier 4, 42.32361,-71.08657 +/-11061m); p81L__1 (tier 1, 42.30759,-71.11192 +/-132m); p81L__2 (tier 1, 42.32364,-71.08508 +/-257m); p81R (tier 1, 42.32639,-71.09071 +/-248m); p84R (tier 1, 42.31816,-71.08613 +/-250m); p85R (tier 4, 42.32361,-71.08657 +/-11061m); p89R__1 (tier 1, 42.32377,-71.08360 +/-253m); p89R__2 (tier 4, 42.32361,-71.08657 +/-11061m); p90L (tier 1, 42.32608,-71.09625 +/-199m); p91L (tier 1, 42.31761,-71.10044 +/-253m); p91R (tier 1, 42.32543,-71.09898 +/-246m); p92R (tier 4, 42.32361,-71.08657 +/-11061m); p93R (tier 4, 42.32361,-71.08657 +/-11061m); p94L (tier 4, 42.32361,-71.08657 +/-11061m); p95R (tier 4, 42.32361,-71.08657 +/-11061m); p98L (tier 4, 42.32361,-71.08657 +/-11061m); p98R (tier 1, 42.33965,-71.07602 +/-249m); p99L__2 (tier 4, 42.32361,-71.08657 +/-11061m); p99R__1 (tier 4, 42.32361,-71.08657 +/-11061m); p99R__2 (tier 4, 42.32361,-71.08657 +/-11061m); p99R__3 (tier 4, 42.32361,-71.08657 +/-11061m)"}],"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1431.0,0.0 1431.0,2067.0 385.1,2067.0 387.1,2020.6 0.0,2010.6 0.0,-0.0 1431.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0062L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09958666183586,42.33611223731292]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09807869141352,42.33843524999191]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09357119546335,42.33681377317399]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09507916588569,42.334490760495]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1441.0,0.0 1441.0,1929.1 9.4,1948.1 0.0,-0.0 1441.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0063L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10605201617528,42.3335136831674]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10459055298313,42.33582766567393]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10013192189534,42.334267037636074]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1015933850875,42.331953055129546]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,2000.0 0.0,163.6 1439.0,89.8 1439.0,1975.5 1388.0,1975.5 1385.0,1317.7 125.6,1789.0 127.0,2054.7 0.0,2000.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0064L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10219034950097,42.33219285390411]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10059701630418,42.33448569937466]}},{"type":"Feature","properties":{"resourceCoords":[1439.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09617307249017,42.332781850180105]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09776640568697,42.330489004709555]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1097.0,0.0 1122.2,1967.3 63.9,1957.8 64.8,0.0 1097.0,0.0\" /></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":[-71.1006557,42.3343226]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0991052,42.3366031]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09465229999999,42.3349487]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0962028,42.3326682]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1443.0,150.3 1443.0,2067.0 20.6,2067.0 0.0,170.9 1443.0,150.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0065L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09673834335054,42.3329945524318]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09509257646029,42.335283095120744]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09068911685333,42.33352807696782]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09233488374358,42.33123953427888]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1033.5,1758.4 938.5,2067.0 -0.0,2067.0 -0.0,-0.0 1432.0,0.0 1432.0,194.2 1028.9,217.9 1091.4,1279.3 933.0,1353.5 1033.5,1758.4\" /></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":[-71.08435184034033,42.33262489095514]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08161917780511,42.33106650805883]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08466196738799,42.32815053724845]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08739462992321,42.32970892014475]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"365.9,0.0 1443.0,0.0 1443.0,1817.6 1441.9,1814.5 527.9,1322.7 515.6,500.7 443.9,351.5 495.6,325.6 365.9,0.0\" /></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_1888-0069L/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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"590.1,1944.9 406.9,1679.0 180.1,1224.7 -0.0,1223.3 -0.0,-0.0 1366.2,-0.0 1443.0,103.6 1443.0,295.8 1379.7,312.6 1381.8,1471.4 1443.0,1476.5 1443.0,1946.0 590.1,1944.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07744258371255,42.3311448835043]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07483607902182,42.32947923581756]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07804078142749,42.32669950820283]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08064728611822,42.32836515588957]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,323.9 61.6,294.3 61.7,117.5 -0.0,-0.0 1412.5,-0.0 1349.5,232.7 1364.0,561.7 1260.7,561.5 1024.5,1434.7 1115.0,1582.9 1429.0,1758.6 1404.2,2001.5 678.7,1971.1 653.1,2067.0 -0.0,2067.0 -0.0,1937.7 60.1,1940.5 60.5,1475.9 -0.0,1470.8 -0.0,323.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0069R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07492564212393,42.32957158486564]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07231506557835,42.32790625450641]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07555046511837,42.32509483659442]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07816104166395,42.32676016695365]}}]}},{"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":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"848.7,1810.2 481.0,1740.1 476.6,1713.1 126.3,1621.8 -0.0,1502.0 -0.0,595.6 100.0,568.8 -0.0,254.3 -0.0,0.0 1433.0,-0.0 1433.0,1862.2 848.7,1810.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0070L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07231994599854,42.32793835273247]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0703824720622,42.325821871736416]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07448279433916,42.32374111733513]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0764202682755,42.32585759833118]}}]}},{"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":"7"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1443.0,2067.0 148.1,2067.0 137.2,1644.8 -0.0,1552.8 -0.0,0.0 1443.0,-0.0 1443.0,2067.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0071L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0709338,42.3231895]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0690046,42.3210444]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07316039999999,42.3190012]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0750896,42.3211463]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,-0.0 1390.8,0.0 1365.5,857.6 1407.9,856.2 1410.3,915.4 1366.7,1860.6 1443.0,1859.2 1443.0,2067.0 -0.0,2067.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0072L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06828633491382,42.320286589425464]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06537442119355,42.31893426344983]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0679758462819,42.31582829628945]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07088776000217,42.317180622265084]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1433.0,2067.0 -0.0,2067.0 63.8,2052.9 62.6,1847.5 -0.0,1849.0 24.8,915.0 -0.0,857.3 -0.0,-0.0 1433.0,0.0 1433.0,2067.0\" /></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":[-71.06546644487901,42.3189988639016]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06255167020826,42.31762696833907]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06520904809452,42.314496125309404]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06812382276526,42.31586802087193]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"576.1,1777.2 224.9,1930.1 -0.0,859.3 -0.0,360.4 704.5,209.0 670.9,-0.0 1437.0,119.7 1437.0,1256.5 1437.0,1256.9 1437.0,2067.0 1022.4,2067.0 1014.4,1773.2 576.1,1777.2\" /></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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"67.7,111.1 246.4,122.2 247.8,-0.0 1323.9,-0.0 1302.2,848.3 1437.0,943.1 1437.0,2067.0 53.4,2067.0 59.3,1259.6 59.3,1259.2 67.7,111.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0073R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07417457919799,42.32443396214649]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07219855067237,42.322325281619875]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07627216239746,42.32020891071642]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07824819092308,42.322317591243035]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,464.4 81.0,436.8 128.4,557.2 736.5,317.8 782.7,719.5 1131.0,1765.9 259.2,2059.4 154.4,1765.8 -0.0,1789.2 -0.0,464.4\" /></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":[-71.0771218451782,42.32743032970009]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07550388123215,42.3251573870334]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07989508211934,42.323424614990294]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08151304606538,42.32569755765699]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,1445.7 0.0,363.4 1136.8,73.7 1381.2,58.5 1349.6,1704.3 1042.0,1852.0 989.8,1779.7 359.1,1621.0 134.0,1478.2 0.0,1445.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08861333195918,42.32611474617824]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08676275106494,42.328308545270176]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0825185413524,42.32632388926432]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08436912224664,42.32413009017239]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,1835.1 0.0,56.4 111.9,86.6 92.6,0.0 526.3,0.0 505.0,288.3 738.2,394.7 870.0,408.7 1230.5,341.2 1419.5,839.8 1367.1,864.8 1437.0,1016.8 1437.0,1846.0 1356.2,1796.2 1071.0,1994.0 828.7,1503.2 771.8,1471.1 746.5,1480.4 597.1,1711.0 684.5,1861.7 449.2,2067.0 157.5,2067.0 75.3,1799.0 0.0,1835.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0075R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08682283772742,42.328224283322704]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08496914371848,42.33033057683649]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08089975998497,42.32834541595371]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08275345399392,42.32623912243993]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"486.9,352.7 936.8,298.8 1275.9,385.9 1367.5,184.6 1395.2,0.0 1444.0,0.0 1444.0,1538.0 1327.0,1478.0 1141.8,1450.4 153.8,1494.1 127.5,1252.8 198.6,963.5 0.0,887.6 0.0,165.3 486.9,352.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0076L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09116678471891,42.32686663671059]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0899482894429,42.3292713893523]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08532486068286,42.32797278558967]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08654335595887,42.32556803294796]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1008.3,127.5 1432.0,541.7 1432.0,1607.2 1371.7,1818.2 1025.4,1784.8 591.0,1906.3 78.0,1795.7 125.2,2067.0 0.0,2067.0 0.0,1016.3 153.1,972.0 138.0,919.1 253.9,897.0 231.7,788.6 511.9,747.6 1008.3,127.5\" /></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_1888-0078L/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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"153.5,1571.1 249.2,1471.4 -0.0,1379.6 -0.0,35.5 617.0,263.1 633.1,219.9 1431.0,531.5 1431.0,1391.0 1187.5,1359.8 1048.5,1609.6 868.5,2067.0 -0.0,2067.0 -0.0,1513.7 153.5,1571.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09782656069898,42.333376585008175]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0944014472436,42.33307100941725]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09499432757363,42.3293877842805]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09841944102901,42.32969335987142]}}]}},{"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":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"109.7,1414.5 167.7,1262.7 -0.0,1225.8 -0.0,887.3 17.4,825.7 73.8,175.0 1164.9,719.1 1221.3,719.0 1437.0,280.1 1437.0,1617.6 450.1,1974.3 109.7,1414.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0078R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[799.0,1828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0932195,42.3296652]}},{"type":"Feature","properties":{"resourceCoords":[110.0,1414.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094561,42.330304]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1289.8,1666.6 1233.7,2067.0 1071.1,2067.0 1129.9,1909.2 132.2,1731.8 145.1,2025.0 0.0,1992.2 0.0,-0.0 1424.0,0.0 1424.0,1705.0 1289.8,1666.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0079L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1013576874545,42.32636045292951]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10099320167086,42.328870045352865]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09610044350367,42.32847614078922]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09646492928731,42.32596654836586]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"305.1,602.6 256.7,317.7 1253.1,368.8 1215.0,530.0 1373.8,510.1 1352.3,2004.7 1430.0,2012.0 1430.0,2067.0 86.4,2067.0 210.3,2023.0 0.0,2062.7 0.0,-0.0 85.5,0.0 159.4,588.3 305.1,602.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0080L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09811514543216,42.32594570410542]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09731812097611,42.32845078416874]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09245470102275,42.32759303488457]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0932517254788,42.32508795482126]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"193.2,2014.5 0.0,2000.3 0.0,120.0 135.1,139.2 115.6,0.0 679.0,0.0 711.7,254.9 1183.3,373.9 1446.0,478.9 1446.0,875.9 1293.3,870.1 932.6,1223.5 1109.0,1476.0 477.1,1939.1 199.9,1905.0 193.2,2014.5\" /></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":[-71.097366753644,42.32836926763281]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09650547102791,42.33091233452826]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09162275222273,42.32999572130255]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09248403483882,42.327452654407104]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"267.8,1814.5 267.1,1795.8 -0.0,1766.7 -0.0,311.3 113.3,292.9 157.0,84.5 453.9,108.2 688.0,43.6 742.8,283.2 1390.3,308.4 1386.9,721.0 1443.0,806.5 1443.0,2015.9 834.3,1786.3 726.0,1818.8 267.8,1814.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.089068631394,42.32686176432533]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08607869907702,42.32558149270194]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08854177283416,42.322392640792756]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09153170515114,42.32367291241614]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"155.5,2030.2 154.9,2015.9 66.5,1985.3 38.9,765.2 -0.0,730.1 -0.0,295.4 249.1,303.0 1415.5,799.7 1398.2,839.3 1446.0,859.8 1446.0,2067.0 203.3,2067.0 208.6,2034.5 155.5,2030.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0082R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08619752805984,42.32560698007672]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08320846424024,42.32430246636483]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08571291873488,42.32112108994031]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08870198255448,42.322425603652206]}}]}},{"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":"8"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"294.7,1855.2 337.6,1645.8 390.7,1623.2 345.1,1589.2 257.7,933.2 306.5,857.0 50.8,620.4 127.7,592.0 68.0,534.6 287.4,366.8 203.7,143.7 515.5,192.4 767.0,-0.0 1094.7,-0.0 1156.9,308.4 1407.8,266.5 1404.0,2067.0 127.8,2067.0 314.4,1994.2 294.7,1855.2\" /></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":[-71.0822511,42.3272641]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.080224,42.3252285]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0842037,42.3230622]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0862308,42.3250978]}}]}},{"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":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,2067.0 -0.0,253.5 652.0,135.4 988.1,-0.0 1446.0,-0.0 1446.0,1590.6 1179.3,1706.7 1446.0,1822.0 1446.0,2067.0 -0.0,2067.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0083R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0802714,42.3252501]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0781933,42.3231539]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0822462,42.3209576]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0843243,42.3230538]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1437.0,2067.0 869.5,2067.0 879.1,1973.7 782.2,1972.4 786.9,1294.9 -0.0,1213.9 -0.0,1043.6 242.9,517.1 311.1,179.8 493.8,141.1 1091.3,132.5 1107.0,12.7 1437.0,-0.0 1437.0,2067.0\" /></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":[-71.07752961624719,42.31629868243637]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07890985331623,42.31381750494977]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08370290142346,42.315295820509306]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08232266435442,42.31777699799591]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1042.4,0.0 1141.2,83.6 1310.8,0.0 1386.9,0.0 1318.4,233.5 1433.0,330.5 1433.0,2067.0 0.0,2067.0 0.0,-0.0 1042.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0085L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08261667390366,42.31925725472653]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08179495528339,42.32176400413641]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07693899729196,42.32088143710322]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07776071591223,42.318374687693336]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"30.6,481.1 1429.0,115.3 1429.0,1897.2 718.9,1965.4 728.0,2067.0 -0.0,2067.0 -0.0,364.2 30.6,481.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0086L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08213575994344,42.32003449573917]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0791387940088,42.31882899816172]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08148048152019,42.3156009819708]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08447744745483,42.316806479548255]}}]}},{"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":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"785.7,1235.4 204.8,1054.0 28.1,1077.3 -0.0,129.3 441.6,0.0 1432.0,0.0 1432.0,2067.0 1305.5,2067.0 1194.8,1369.2 1145.3,1260.4 785.7,1235.4\" /></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":[-71.0791046,42.3188458]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0761314,42.3175697]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0786224,42.3143963]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0815956,42.3156724]}}]}},{"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":"6"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1431.0,0.0 1431.0,2067.0 409.9,2067.0 394.2,1911.3 229.7,1898.3 261.4,1503.2 209.6,1226.1 0.0,1258.1 -0.0,-0.0 1431.0,0.0\" /></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":[-71.0859068,42.3119677]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0843802,42.3142464]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0799292,42.3126158]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0814558,42.3103371]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"689.8,54.5 747.5,1481.6 771.1,2067.0 0.0,2067.0 49.0,45.0 0.0,43.5 0.0,-0.0 1275.0,0.0 1273.0,31.0 689.8,54.5\" /></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":[-71.08453001409121,42.31419982845904]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08306363777022,42.31656147697467]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07848586174751,42.31498531415646]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0799522380685,42.31262366564083]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,2067.0 0.0,-0.0 1434.0,0.0 1434.0,121.6 1388.6,276.2 1337.9,2066.1 0.0,2067.0\" /></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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,287.3 40.5,132.7 37.1,11.8 0.0,-0.0 1190.5,0.0 1098.2,795.9 1319.0,785.7 1342.3,1064.0 1272.1,1449.8 1432.0,1479.8 1432.0,2067.0 0.0,2067.0 0.0,287.3\" /></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":[-71.08594453933237,42.3095982251028]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08473205142018,42.31202074386641]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08003671776011,42.310717357947055]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08124920567231,42.308294839183446]}}]}},{"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":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"572.1,105.0 670.9,56.4 1438.0,194.8 1438.0,2067.0 241.0,2067.0 136.4,172.9 572.1,105.0\" /></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":[-71.092476,42.321307]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,1802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091373,42.320423]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"79.0,85.9 21.6,-0.0 1422.4,0.0 1432.0,2067.0 -0.0,2067.0 -0.0,119.3 79.0,85.9\" /></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":[-71.0932912,42.325287]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0906374,42.3238447]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0934531,42.3210125]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0961069,42.3224548]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,-0.0 1429.0,0.0 1429.0,2067.0 0.0,2067.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0092L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10582134175482,42.3231498676014]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10516344408072,42.32570186885789]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10020567896146,42.32499332003166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10086357663556,42.32244131877517]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"1430.0,2067.0 12.1,2067.0 143.5,671.4 0.0,658.9 -0.0,-0.0 1430.0,0.0 1430.0,2067.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0093L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10526773075131,42.319138944770735]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10364930707924,42.32135987774194]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09933804509592,42.31961794197158]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10095646876799,42.31739700900037]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"0.0,2067.0 0.0,-0.0 1277.7,0.0 1292.0,153.7 1432.0,152.9 1432.0,2067.0 0.0,2067.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0094R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1059348550395,42.31680875451076]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10401376549187,42.318946257595385]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0998704159433,42.31688136387775]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10179150549092,42.31474386079312]}}]}},{"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":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,0.0 1434.0,0.0 1434.0,1946.1 1310.0,1956.5 1304.8,1881.1 -0.0,1970.5 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0095L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10704748000349,42.31470630631153]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10423236192506,42.31326171910114]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10702846360272,42.310239888799344]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10984358168115,42.31168447600973]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"406.8,985.6 368.7,898.4 463.8,787.4 420.1,87.8 121.6,91.0 127.8,0.0 1433.0,0.0 1433.0,1992.0 1372.8,1996.1 1373.7,2067.0 -0.0,2067.0 -0.0,1899.5 330.7,1878.8 406.8,985.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0096L/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10997575465042,42.31194144650289]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10703061707412,42.31064189031063]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10954764352937,42.307478145527824]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11249278110567,42.30877770172009]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"-0.0,2067.0 -0.0,1975.5 60.1,1975.6 85.7,64.1 209.6,63.8 214.8,0.0 1442.0,0.0 1442.0,2067.0 -0.0,2067.0\" /></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":[-71.1072240001272,42.310701511906586]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10422972491372,42.30942019398763]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1066959651803,42.306223775284394]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10969024039376,42.30750509320335]}}]}},{"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"}],"created":"2026-09-21T21:47:51Z","modified":"2026-09-21T21:47:51Z","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=\"112.2,467.7 -0.0,457.8 -0.0,-0.0 1175.4,0.0 1136.4,296.9 1430.0,312.0 1430.0,1002.4 1329.7,1105.7 1361.7,1193.7 1232.2,2067.0 89.2,2067.0 112.2,467.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693188803:03693_03_1888-0097R/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11196342406171,42.313103780502956]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10887467174015,42.311928062094914]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11115666324257,42.30860314165171]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11424541556413,42.30977886005975]}}]}}]}