{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03693_011.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boston, Massachusetts | 1899 | 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":"112"},{"label":"placed","value":"89"},{"label":"unplaced","value":"23"},{"label":"fit sources","value":"georef-snap 50, georef 33, snap:0 5, georef-street 1, snap:2 1, streets-candidate 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.31904,-71.06100 +/-245m); p12 (tier 1, 42.34444,-71.04294 +/-247m); p16 (tier 1, 42.34574,-71.05204 +/-247m); p18__1 (tier 1, 42.34624,-71.04998 +/-226m); p18__3 (tier 2, 42.34736,-71.04837 +/-312m); p18__4 (tier 1, 42.34734,-71.05070 +/-100m); p19 (tier 1, 42.34389,-71.05083 +/-100m); p32 (tier 1, 42.33716,-71.03546 +/-247m); p33 (tier 1, 42.33793,-71.02833 +/-242m); p38 (tier 1, 42.33545,-71.02793 +/-219m); p3__1 (tier 2, 42.31278,-71.05485 +/-100m); p3__2 (tier 1, 42.35344,-71.04667 +/-233m); p4 (tier 3, 42.34563,-71.03313 +/-1244m); p5 (tier 1, 42.34980,-71.04363 +/-241m); p6 (tier 1, 42.33170,-71.03539 +/-247m); p63 (tier 1, 42.33460,-71.02815 +/-248m); p65 (tier 1, 42.33391,-71.05841 +/-249m); p76 (tier 1, 42.33462,-71.03532 +/-243m); p77 (tier 1, 42.33147,-71.03524 +/-128m); p9__1 (tier 1, 42.32187,-71.05921 +/-218m); p9__2 (tier 1, 42.32094,-71.05914 +/-211m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0001","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1169.6,1425.7 381.9,1588.5 376.2,1536.2 392.6,754.4 465.4,648.0 425.6,434.2 -0.0,513.7 0.0,0.0 1377.0,0.0 1377.0,165.4 1100.5,217.0 1154.0,475.1 1169.6,1425.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05304867680839,42.35050650951067]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05077146566087,42.35240990068228]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04710524326289,42.349980277282796]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0493824544104,42.34807688611119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0010","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1377.0,1974.0 -0.0,1960.2 0.0,0.0 1377.0,0.0 1377.0,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04372473965896,42.34935308480933]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04212830157442,42.34872920374861]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04332993872575,42.34702584176321]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04492637681028,42.34764972282393]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0100","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.1,1899.9 322.6,1389.2 133.9,1391.1 140.9,237.4 1103.0,0.0 1263.5,0.0 1246.4,1018.4 1279.3,1642.6 1225.2,1656.4 1125.1,1683.3 1145.3,1866.5 1368.0,1841.9 1368.0,1997.0 343.6,1997.0 360.4,1889.9 307.1,1899.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05734123126105,42.31526881373839]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05656804569601,42.31774871671851]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05170656459109,42.31690822437663]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05247975015612,42.31442832139651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p101","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0101","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1997.0 -0.0,1322.5 183.2,1328.0 101.7,373.4 1240.0,371.4 1237.8,1254.2 1138.6,1823.0 668.9,1640.4 210.6,1700.1 192.9,1442.7 83.3,1441.5 77.6,1997.0 -0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[665.0,1166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0557691,42.3137323]}},{"type":"Feature","properties":{"resourceCoords":[1236.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.053777,42.315269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p102","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0102","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"357.4,1183.5 199.5,115.4 707.1,51.2 688.9,0.0 1368.0,0.0 1368.0,1997.0 340.8,1766.2 357.4,1183.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0102/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05413043633041,42.3156067688512]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05096595207849,42.3146536118042]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05283439598344,42.311213510174454]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05599888023536,42.312166667221454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p103","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0103","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1172.2,596.5 741.2,1682.5 184.4,1652.7 204.8,1333.0 0.0,1314.7 0.0,-0.0 1368.0,0.0 1368.0,111.3 1106.9,131.8 1172.2,596.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[885.0,1322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0544639,42.3120234]}},{"type":"Feature","properties":{"resourceCoords":[230.0,604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0566015,42.3111769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0104","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 337.2,0.0 342.9,157.4 616.2,145.8 575.5,338.0 1368.0,368.7 1368.0,1997.0 0.0,1997.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05542720076159,42.30960676965474]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05308447897751,42.3144512842263]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04358830550669,42.311904417157734]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04593102729078,42.30705990258617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p11","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0011","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,121.7 447.1,-0.0 1377.0,-0.0 1377.0,356.8 1085.2,1974.0 -0.0,1974.0 -0.0,121.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1082.0,538.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0429907,42.3455505]}},{"type":"Feature","properties":{"resourceCoords":[1082.0,1955.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0452452,42.343595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0013","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1377.0,0.0 1377.0,36.0 678.8,165.8 692.8,238.2 1151.7,892.8 1176.9,1023.9 1146.1,1282.6 670.3,1767.9 54.1,440.1 -0.0,473.8 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0013/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06148894587184,42.343006637595444]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05905815961586,42.34486388591275]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0554812482655,42.34227009487673]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05791203452148,42.340412846559424]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p14","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0014","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"967.3,1452.2 1189.3,1724.5 939.3,1644.6 805.2,1644.6 74.1,1974.0 -0.0,1974.0 0.0,-0.0 861.1,0.0 1079.3,1407.5 967.3,1452.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0572393,42.346772]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0543439,42.3453537]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0570948,42.342285999999994]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0599902,42.3437043]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0015","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1052.2,1574.4 720.6,1447.0 -0.0,1543.4 0.0,-0.0 1228.6,0.0 1190.2,440.6 1199.0,1063.9 1052.2,1574.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05532563175868,42.34605058578261]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05223595035466,42.34498429042156]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05428959223754,42.34168748798891]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05737927364156,42.34275378334996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0017","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"624.9,1752.7 374.7,1853.8 209.9,1254.0 134.3,802.4 -0.0,836.6 0.0,0.0 1377.0,-0.0 1377.0,640.2 1243.6,636.5 1228.5,1098.2 999.6,1097.7 991.9,1280.8 689.0,1272.2 684.2,1639.2 624.9,1752.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05161004101605,42.34635655855334]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0490611131572,42.34481018228431]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05203937229281,42.34209038426081]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05458830015166,42.34363676052983]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0018__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 | 1899 | sanborn03693_011 p18 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4593.6"},{"label":"split_canvas_w","value":"2399.6"},{"label":"split_canvas_h","value":"3302.4"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0018__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0018","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1974.0 374.1,1974.0 375.1,1372.2 0.0,1365.0 0.0,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[144.0,1183.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0511185,42.3469586]}},{"type":"Feature","properties":{"resourceCoords":[527.9,1183.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0506407,42.3475744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0002","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1974.0 4.2,1758.1 258.0,262.4 252.7,0.0 1377.0,0.0 1377.0,1974.0 0.0,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05115206546535,42.35135840650636]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04937384297843,42.353550457474235]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04515152997497,42.35165325912929]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04692975246189,42.349461208161415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0020","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"285.4,178.8 282.6,-0.0 1377.0,-0.0 1377.0,1974.0 -0.0,1974.0 -0.0,1566.8 312.7,1564.0 328.6,176.3 285.4,178.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04328615949517,42.34618129226401]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04064612946053,42.34448870506925]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04390598503501,42.34167169775013]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04654601506965,42.34336428494489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0021","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"892.6,1487.6 794.2,1375.7 781.7,1316.1 48.8,558.0 823.2,200.5 1178.8,229.6 1182.4,1728.7 892.7,1401.2 892.0,1485.5 892.6,1487.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05641378588479,42.34434734010205]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05386279482906,42.34268338566237]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05706741410562,42.33996130906299]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05961840516134,42.34162526350267]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p22","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0022","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.7,1666.2 297.1,565.2 577.8,-0.0 867.5,-0.0 1377.0,1298.8 1377.0,1974.0 1146.2,1974.0 304.7,1666.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1147.0,1114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0530097,42.3415823]}},{"type":"Feature","properties":{"resourceCoords":[1147.0,1670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0539237,42.3408057]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p23","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0023","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"287.2,1974.0 287.7,1378.9 -0.0,1375.8 2.3,459.8 227.0,454.1 226.0,-0.0 1377.0,-0.0 1377.0,459.9 1125.5,459.2 1128.0,1781.0 1091.2,1781.1 813.1,1782.1 812.2,1974.0 287.2,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[287.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.051714,42.342685]}},{"type":"Feature","properties":{"resourceCoords":[287.0,1784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0530097,42.3415823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0024","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.1,1974.0 -0.0,1974.0 0.0,-0.0 1109.5,-0.0 1109.5,-0.0 1377.0,3.0 1124.3,1731.3 307.1,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04915657659633,42.343389771134916]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04657641390605,42.34169265631483]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04984481425878,42.33893938199304]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05242497694906,42.34063649681313]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0025","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"334.5,1736.7 346.9,-0.0 1377.0,-0.0 1377.0,102.0 892.5,98.7 889.5,534.9 1118.2,536.3 1169.3,536.6 1162.6,1740.0 334.5,1736.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04774378186724,42.34242916528161]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04514696860177,42.34077437334212]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04833383603308,42.33800330947111]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05093064929855,42.3396581014106]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0026","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.7,1647.3 281.1,438.1 -0.0,438.2 0.0,0.0 1020.7,-0.0 1001.6,1647.8 282.7,1647.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04621989472572,42.34121804188031]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04365068862377,42.339557914413994]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04684778504738,42.33681627041514]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04941699114933,42.33847639788146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0027","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1816.2 0.0,-0.0 1377.0,-0.0 1377.0,358.5 1236.0,488.9 1269.7,1798.2 -0.0,1816.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0440143205916,42.340239658325395]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04144992919032,42.33854340004789]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04471654956787,42.335806845929746]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04728094096915,42.33750310420725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0028","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.2,1198.4 299.6,837.0 -0.0,839.2 0.0,-0.0 43.6,-0.0 757.4,771.1 906.6,631.1 1217.2,956.7 331.3,1809.0 200.8,1873.5 182.2,1974.0 161.0,1330.9 302.2,1198.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04061450039744,42.340056341750284]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03808663610266,42.33835983393675]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04135373100007,42.33566225422495]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04388159529485,42.337358762038484]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p29","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0029","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1377.0,0.0 1377.0,809.3 1225.0,812.5 1182.9,854.1 1195.8,1750.6 -0.0,1759.0 0.0,0.0 1377.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04055747496594,42.341314074870525]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03712162742113,42.34134717473733]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03705744150514,42.33770595570462]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04049328904995,42.337672855837816]}},{"type":"Feature","properties":{"resourceCoords":[992.0,1752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0380253,42.3381062]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0030","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1096.7,1745.1 273.4,1740.3 272.1,835.0 315.4,793.5 470.0,792.4 480.4,0.0 1377.0,0.0 1377.0,145.6 1106.1,144.9 1096.7,1745.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03829940968372,42.34127914946133]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03492076439258,42.34134500578207]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03479393753724,42.33773959083157]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03817258282838,42.33767373451083]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p31","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0031","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1053.0,1584.0 221.5,1584.8 227.8,0.0 1377.0,0.0 1377.0,1974.0 1052.0,1974.0 1053.0,1584.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0361444704984,42.34105714015527]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03270933229017,42.34111845257113]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0325904377461,42.3374779852743]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03602557595433,42.33741667285844]}},{"type":"Feature","properties":{"resourceCoords":[1053.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0334222,42.3381828]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0034","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1343.0,1503.0 1091.4,1501.9 1089.3,1868.5 234.3,1861.6 239.9,499.1 -0.0,497.7 0.0,0.0 1377.0,0.0 1377.0,1974.0 1340.9,1974.0 1343.0,1503.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02787349185337,42.33919454806472]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02446834445774,42.33925912342844]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0243439878149,42.33562533026484]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02774913521053,42.33556075490112]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p35","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0035","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"320.1,1763.0 322.7,1703.9 0.0,1818.2 -0.0,0.0 1377.0,0.0 1377.0,1401.8 748.1,1586.4 489.4,1738.5 320.1,1763.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06144801868858,42.33792702207788]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06050098463878,42.34036885340088]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05576588461372,42.33936521212699]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05671291866352,42.33692338080399]}},{"type":"Feature","properties":{"resourceCoords":[1268.0,1434.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0571367,42.339447]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0036","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1275.5,0.0 1283.2,1488.0 1215.1,1479.6 290.6,1826.8 198.1,417.1 0.0,429.4 0.0,-0.0 1275.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06163797137586,42.34028352597999]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06049204853453,42.34267237079749]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05589141305842,42.34144958071797]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05703733589975,42.339060735900475]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p37","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0037","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1133.6,909.5 1117.1,1997.0 1007.5,1924.1 -0.0,799.6 -0.0,713.6 288.9,1041.2 284.2,104.7 1134.0,106.9 1133.8,413.6 1366.7,413.1 1368.0,910.0 1133.6,909.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[288.0,618.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0563402,42.3411207]}},{"type":"Feature","properties":{"resourceCoords":[646.0,1516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0571367,42.339447]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p39","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0039","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1123.0,1792.0 183.5,1784.0 184.4,1634.8 -0.0,1633.1 -0.0,1465.9 -0.0,1465.9 -0.0,500.5 302.1,505.4 303.4,263.7 1130.8,273.3 1123.0,1792.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1123.0,1338.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0516539,42.3381198]}},{"type":"Feature","properties":{"resourceCoords":[1123.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0523884,42.3374892]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0040","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1105.8,1790.6 278.9,1791.0 280.8,278.1 1109.9,273.1 1105.8,1790.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0040/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04998690872256,42.34031686539484]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04743303980456,42.338655346052455]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05069134307452,42.33588013232739]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05324521199252,42.337541651669774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0041","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1082.5,1737.5 269.2,1738.1 278.8,222.8 1091.5,223.4 1082.5,1737.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0041/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04852069505783,42.339238009335034]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04595526434987,42.33758091884562]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04920482483128,42.33479309181875]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05177025553924,42.33645018230817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p42","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"23"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0042","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"915.6,1727.1 98.3,1726.0 94.7,218.7 1265.0,214.0 1272.8,633.6 1306.7,694.6 1193.1,777.5 915.6,1727.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1051.0,1281.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0467887,42.3349578]}},{"type":"Feature","properties":{"resourceCoords":[1265.0,214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0446256,42.3361827]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0043","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"227.7,1897.6 220.0,154.8 612.6,155.1 700.0,120.4 1166.1,545.2 1124.1,684.1 1140.4,1910.2 227.7,1897.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04464209404543,42.33507870741448]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04470682465897,42.3376018143376]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03975905145596,42.33767215711786]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03969432084241,42.33514905019474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0044","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1203.8,321.8 1195.0,1685.4 174.0,1676.2 199.9,309.8 1203.8,321.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04051239208432,42.33863428793108]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03713684621837,42.33871432090523]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03697990164723,42.335046141172306]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04035544751318,42.33496610819815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0045","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1104.4,313.6 1119.6,1677.2 303.9,1688.6 283.8,321.6 1104.4,313.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0382239449554,42.33869750377603]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03485567644323,42.33872424287361]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03480324094033,42.33506398276395]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03817150945251,42.33503724366637]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0046","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1093.4,1611.3 255.6,1604.1 264.2,247.2 1102.7,249.8 1100.2,640.4 1368.0,641.5 1368.0,1267.0 1095.9,1262.0 1093.4,1611.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.036167230398,42.33858567078193]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03278342986009,42.33865661363123]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03264431071567,42.334979471480096]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03602811125357,42.3349085286308]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p47","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0047","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1613.0 -0.0,-0.0 1368.0,0.0 1368.0,252.3 1149.8,251.0 1368.0,1617.8 1368.0,1997.0 1142.6,1997.0 -0.0,1613.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0300065,42.3382451]}},{"type":"Feature","properties":{"resourceCoords":[324.0,1615.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0312813,42.3357091]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p48","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"7"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0048","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"315.7,316.5 532.1,320.0 534.8,69.8 -0.0,64.2 -0.0,-0.0 906.7,0.0 903.0,326.1 1139.5,330.0 1119.0,1682.7 852.5,1997.0 514.7,1997.0 295.0,1671.0 315.7,316.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[729.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0281974,42.336621]}},{"type":"Feature","properties":{"resourceCoords":[513.0,320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0288206,42.3382633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0049","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"796.9,1997.0 -0.0,1997.0 -0.0,1869.5 255.6,-0.0 959.9,-0.0 1119.9,146.8 1368.0,1615.3 1368.0,1661.2 796.9,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05572091343011,42.34001166216286]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05312254058934,42.338327567511215]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05642509299948,42.33550397395996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05902346584024,42.3371880686116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p50","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"2"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0050","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1081.5,310.4 1058.9,1947.7 284.1,1594.0 300.8,1020.6 355.5,845.8 344.3,304.2 1081.5,310.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[293.0,1161.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0553959,42.3372367]}},{"type":"Feature","properties":{"resourceCoords":[293.0,1419.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0558349,42.3368593]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0051","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1062.6,1694.7 223.8,1661.3 232.2,280.7 1057.7,277.4 1062.6,1694.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05236074379992,42.33816224473552]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04981028062646,42.33649153337638]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05308653243985,42.33371995513568]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05563699561331,42.33539066649482]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p52","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"7"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0052","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1116.1,241.7 1098.2,1765.4 285.9,1657.0 299.3,231.8 1116.1,241.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[904.0,1740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0521274,42.3336617]}},{"type":"Feature","properties":{"resourceCoords":[711.0,1136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0515202,42.3347345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p53","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0053","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"581.9,1786.4 624.2,1468.3 588.0,1450.8 541.1,1781.8 144.9,1733.3 152.0,212.9 975.6,220.0 878.4,491.3 918.9,491.6 814.2,838.2 1150.8,1189.6 916.4,1399.6 1236.6,1776.4 581.9,1786.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[916.0,1400.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0498081,42.3329339]}},{"type":"Feature","properties":{"resourceCoords":[976.0,220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0477808,42.3345025]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p54","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0054","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,1015.2 1368.0,1067.7 1100.5,1075.2 1109.0,1876.5 653.0,1881.5 150.2,1443.8 163.0,950.0 477.4,950.0 461.0,464.3 762.6,269.5 739.9,248.9 1073.5,62.5 1099.9,1016.1 1368.0,1015.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[790.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0482484,42.3329545]}},{"type":"Feature","properties":{"resourceCoords":[1109.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0474549,42.332965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0055","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"923.4,539.7 1303.0,125.7 1337.2,212.4 1345.4,1997.0 23.2,1997.0 -0.0,1054.1 767.1,591.8 907.1,607.2 923.4,539.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04763885420236,42.33655604576311]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04422134809583,42.336610323908815]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0441149122818,42.332896421814496]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04753241838833,42.33284214366879]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0056","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1222.3,1642.3 131.8,1655.6 125.7,1536.2 109.0,274.9 1205.4,260.3 1222.3,1642.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0445464,42.3359903]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0411618,42.336019]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04110519999999,42.3323666]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0444898,42.3323379]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0057","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1011.3,1702.8 371.6,1708.0 359.9,335.5 1009.0,331.3 1011.3,1702.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04245984509723,42.33614711837047]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03907581453677,42.33618577499555]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03900001195824,42.33250822853934]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04238404251869,42.33246957191426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0058","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1239.2,1587.7 214.5,1590.8 219.1,226.5 1232.7,224.0 1239.2,1587.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04050761401686,42.33597653955767]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03710614269136,42.33602818838784]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03700486375718,42.33233167642348]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04040633508268,42.332280027593306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0059","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,1691.0 1368.0,1997.0 447.1,1997.0 447.0,1691.5 283.2,1691.5 280.1,321.4 1091.6,319.9 1108.1,1691.1 1368.0,1691.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03814252315186,42.336188635855656]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03475728247399,42.33624631741633]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03464417344301,42.33256745787735]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03802941412089,42.33250977631668]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p60","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"1"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0060","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1735.8 236.1,361.4 1066.8,348.8 1094.5,1714.8 770.5,1997.0 744.0,1997.0 540.1,1997.0 280.7,1997.0 -0.0,1997.0 -0.0,1735.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03601634209413,42.33630995862992]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03260269553962,42.33632126930013]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0325803608153,42.33263734895535]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03599400736981,42.33262603828514]}},{"type":"Feature","properties":{"resourceCoords":[621.0,1272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0344525,42.3339686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p61","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"9"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0061","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1146.2,1696.2 324.1,1707.8 299.3,0.0 801.7,0.0 807.3,340.4 1094.7,337.4 1129.0,337.0 1146.2,1696.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[594.0,1704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0325896,42.3331674]}},{"type":"Feature","properties":{"resourceCoords":[1129.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0312813,42.3357091]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p62","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0062","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1113.1,1719.2 290.4,1721.3 289.0,354.0 1107.1,351.9 1108.4,731.5 1333.5,730.4 1333.3,676.8 1368.0,676.3 1368.0,1451.6 1112.9,1448.7 1113.1,1719.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[289.0,1270.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0312331,42.3340225]}},{"type":"Feature","properties":{"resourceCoords":[289.0,354.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0312813,42.3357091]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0064","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"267.5,1465.8 -0.0,1462.8 -0.0,362.4 30.9,362.4 31.4,475.3 171.4,474.7 264.5,362.2 1116.8,365.5 1117.2,0.0 1368.0,0.0 1368.0,1997.0 1220.0,1997.0 1225.8,1476.7 1115.3,1475.4 1114.7,1722.2 267.4,1724.1 267.5,1465.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02785202321553,42.336437415579]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02445787654128,42.33649084882541]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02435309796577,42.332802316343454]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02774724464003,42.33274888309704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0066","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1281.3,2.1 1243.2,1997.0 -0.0,1997.0 -0.0,-0.0 1281.3,2.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06020511782137,42.33484264235767]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05683373289361,42.33492270881319]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05667673162573,42.33125884165217]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06004811655347,42.331178775196655]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0067","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1022.9,1688.7 597.7,1192.7 -0.0,1729.5 -0.0,158.2 591.5,440.1 592.3,393.0 1095.5,628.0 1368.0,758.6 1368.0,805.2 1093.7,680.0 1067.8,1606.7 1022.9,1688.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0562866796674,42.33729069013322]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05371383458501,42.335681375974666]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05686962393122,42.33288541955075]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0594424690136,42.334494733709306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0068","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,1056.0 1368.0,1380.7 318.8,1671.2 217.8,1559.3 260.4,1477.7 266.9,564.5 539.6,682.2 538.7,636.4 306.7,530.7 267.7,513.3 269.9,181.4 1105.2,216.4 1013.7,895.5 1368.0,1056.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05487726312874,42.33616685622718]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05231141310759,42.33449317823905]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0555933440222,42.33170476155882]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05815919404336,42.33337843954695]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0069","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"402.6,1400.2 383.7,1075.1 19.6,935.0 71.7,249.8 1281.0,317.0 1305.2,-0.0 1344.3,-0.0 1201.0,1390.8 756.9,1236.4 690.1,1308.3 402.6,1400.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05285105246993,42.33493509688654]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05042723782577,42.33315827373179]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05391135968243,42.3305241618996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05633517432659,42.33230098505435]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0007","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1974.0 0.0,-0.0 224.2,0.0 318.4,94.0 1162.0,262.7 1181.8,1389.6 1377.0,1385.0 1377.0,1974.0 -0.0,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05153850025503,42.35056029111765]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04869568167422,42.34928364584479]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05115463277554,42.346250481720894]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05399745135635,42.347527126993754]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0070","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"292.5,1585.7 -0.0,1442.6 -0.0,1221.5 238.7,1223.5 250.1,555.6 -0.0,544.7 -0.0,494.0 150.8,258.0 1160.0,476.7 1147.0,1553.3 342.9,1547.2 292.5,1585.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05379648007002,42.331680325519564]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05166336509896,42.33365071219529]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.047799766241,42.33133247626989]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04993288121206,42.32936208959416]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0071","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.8,1997.0 100.5,1584.0 -0.0,1712.2 -0.0,1525.0 127.8,1236.0 85.0,1167.8 60.6,383.9 321.9,373.7 636.8,71.6 1010.8,485.6 1368.0,142.8 1368.0,1997.0 41.8,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04848734850786,42.33213760615582]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0459289303535,42.33046960269691]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04919952277825,42.32768908295154]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05175794093262,42.32935708641045]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0072","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,-0.0 1368.0,1692.6 -0.0,1662.0 -0.0,319.1 1286.3,349.8 1293.4,-0.0 1368.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04338554724376,42.3328731461343]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04323236935561,42.330370125794246]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04814037799883,42.33020365460866]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04829355588699,42.33270667494871]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p73","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0073","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1674.5 524.9,1661.6 523.1,1587.0 175.3,1588.4 174.8,235.7 1265.0,233.0 1276.7,1583.7 912.8,1586.4 914.1,1997.0 -0.0,1997.0 -0.0,1674.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[970.0,1128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0421589,42.3313635]}},{"type":"Feature","properties":{"resourceCoords":[1265.0,233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0414758,42.3330122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0074","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1997.0 -0.0,659.8 362.2,211.4 1011.2,212.2 1368.0,1832.2 1368.0,1997.0 -0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04237143255733,42.33337969724035]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03903663792283,42.333441115230066]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03891620737272,42.32981691689751]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04225100200722,42.329755498907794]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p75","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0075","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"176.8,1613.8 172.6,101.3 1368.0,100.9 1368.0,1997.0 -0.0,1997.0 -0.0,1863.0 527.6,1862.1 527.3,1699.5 176.8,1613.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0075/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04032567251215,42.33321896676868]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03694634540912,42.33327703139222]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03683248982323,42.32960444992302]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04021181692626,42.32954638529948]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p78","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0078","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,174.4 1106.1,173.0 1106.5,1454.5 1128.1,1556.8 1368.0,1412.9 1368.0,1997.0 -0.0,1997.0 -0.0,174.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[818.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0318851,42.3323545]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0311887,42.332366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0079","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.8,274.7 1065.9,0.0 1368.0,0.0 1368.0,976.4 840.5,1297.8 840.4,1376.8 1368.0,1378.0 1368.0,1997.0 510.4,1997.0 505.3,1502.1 267.1,1647.3 244.8,1581.4 230.8,274.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03177847170268,42.33368684330391]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02843230170988,42.33371677056764]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0283736189989,42.330080227149054]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0317197889917,42.33005029988532]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0008","type":"ImageService3","width":1377,"height":1974},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"251.7,770.5 251.8,770.5 254.9,79.3 1033.7,198.0 1038.5,0.0 1377.0,0.0 1377.0,1974.0 244.3,1974.0 251.7,770.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0489197262037,42.35073038269489]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04594308063048,42.34946409981333]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04838209388399,42.34628817568777]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05135873945721,42.34755445856933]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p80","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0080","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"718.6,1768.6 270.1,1775.5 266.0,1482.0 7.7,1482.6 -0.0,953.1 258.7,950.4 247.1,107.8 -0.0,110.0 -0.0,0.0 1368.0,-0.0 1368.0,1997.0 1290.0,1997.0 971.5,1480.6 715.0,1481.1 718.6,1768.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02473308999471,42.33375785291781]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02469941141815,42.33123436349345]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02968244421449,42.331198018432126]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02971612279104,42.33372150785649]}},{"type":"Feature","properties":{"resourceCoords":[711.0,1154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0275951,42.3324253]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p81","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0081","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1997.0 -0.0,1829.6 35.3,1843.4 480.6,705.7 179.4,581.5 386.6,392.7 1158.0,252.8 1268.1,1008.4 1351.4,1073.7 632.0,1997.0 -0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,1330.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0582736,42.3305369]}},{"type":"Feature","properties":{"resourceCoords":[1137.0,251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0552867,42.330465]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p82","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"15"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0082","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.1,1716.4 289.6,973.1 152.8,729.3 648.3,33.8 1287.2,1256.5 1368.0,1310.4 1296.3,1730.2 779.5,1762.1 264.1,1716.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[279.0,1481.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0556216,42.3308676]}},{"type":"Feature","properties":{"resourceCoords":[844.0,1784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0540251,42.3310348]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0083","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,722.0 1256.2,705.4 1213.0,978.5 868.0,928.7 570.4,1796.0 473.6,1751.2 52.8,667.1 747.4,368.1 892.1,204.9 972.4,176.1 1018.0,89.5 455.7,36.2 456.3,-0.0 1368.0,24.0 1368.0,722.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0083/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05283627394691,42.33110194818159]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05225426808047,42.32861922072369]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05712232761367,42.32798668586562]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0577043334801,42.33046941332352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0084","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"389.3,311.7 8.3,212.7 26.6,176.3 1067.0,359.1 1049.8,398.0 1097.3,401.2 947.9,693.1 1228.2,691.0 1285.7,1365.3 1045.0,1388.0 1075.2,1613.7 887.6,1625.2 1023.6,1718.9 602.1,1685.2 621.3,1997.0 -0.0,1997.0 -0.0,1662.9 150.2,1769.5 707.1,1036.8 673.0,1011.8 300.8,1443.3 256.1,1355.1 279.3,1272.3 229.6,1057.9 389.3,311.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0556548933343,42.33069029804851]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05329407907703,42.33246472237291]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04981479433638,42.329898978714425]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05217560859366,42.32812455439002]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0085","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1229.5,1456.2 -0.0,1455.9 -0.0,109.9 1209.9,429.5 1229.5,1456.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0085/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.059994125279,42.33028963993978]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05658006865474,42.3302968649905]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05656590221307,42.32658634498438]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05997995883733,42.326579119933655]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0086","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"195.2,1683.0 203.2,261.7 1093.6,426.8 1094.9,771.2 1368.0,773.8 1368.0,1997.0 920.2,1997.0 1306.0,1474.5 1307.1,1386.5 778.4,1380.1 749.0,1686.0 195.2,1683.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05749747155056,42.32997631381366]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05407101824662,42.330041662616075]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0539428870782,42.32631764609385]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05736934038214,42.32625229729143]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p87","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0087","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"366.5,1223.8 -0.0,1038.5 -0.0,873.8 296.6,641.2 325.2,744.9 386.2,783.8 397.3,534.7 330.7,534.7 412.2,202.8 -0.0,137.6 -0.0,-0.0 1248.3,0.0 1269.0,1841.2 274.7,1478.0 366.5,1223.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[556.0,653.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0586717,42.3263603]}},{"type":"Feature","properties":{"resourceCoords":[275.0,1478.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0593813,42.3248071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p88","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"3"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0088","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,1503.2 252.9,1501.4 253.0,314.0 810.1,310.2 836.1,0.0 1368.0,0.0 1368.0,89.2 986.1,623.2 1368.0,618.6 1368.0,1503.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[253.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0568505,42.324129]}},{"type":"Feature","properties":{"resourceCoords":[253.0,314.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0569005,42.3268472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0089","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.9,225.6 1259.8,351.4 1297.1,1435.1 43.2,1958.3 157.9,225.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06134925246735,42.32288693149015]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06009121888404,42.32523328624691]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0554910047948,42.32386589812868]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05674903837811,42.32151954337192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p90","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0090","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,0.0 1368.0,1767.0 884.7,1808.2 425.6,1997.0 197.3,1997.0 202.6,0.0 1368.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[574.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0559028,42.32339]}},{"type":"Feature","properties":{"resourceCoords":[206.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0568311,42.3233818]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p91","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0091","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"645.9,1997.0 -0.0,1997.0 -0.0,-0.0 1231.5,0.0 1299.5,469.9 1118.0,1671.1 1091.1,1733.1 809.2,1987.0 645.9,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[426.0,1012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0643301,42.3238037]}},{"type":"Feature","properties":{"resourceCoords":[1094.0,1575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0613447,42.3210988]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0092","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2.9,301.6 143.8,332.1 460.4,178.1 661.2,141.1 1105.4,83.1 1368.0,101.8 1270.5,1810.7 789.0,1997.0 761.6,1915.0 543.9,1794.3 412.2,1672.4 201.1,1399.6 59.9,1108.5 0.0,1128.6 0.0,1089.6 44.7,1068.4 0.0,916.0 2.9,301.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0092/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06222378320345,42.32069006705425]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06092893948507,42.32306562412103]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05627163371841,42.321658177264894]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0575664774368,42.319282620198116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0093","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1368.0,0.0 1302.0,486.9 1349.5,665.2 1273.2,1125.4 1292.6,1337.1 1245.3,1352.9 1240.5,1391.9 1146.7,1411.1 717.1,1886.0 625.8,1855.2 210.3,1890.5 232.1,794.2 68.3,779.4 147.4,86.3 0.0,51.8 0.0,-0.0 1368.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0093/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06375817899273,42.318344512646476]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06286448386899,42.32080055538471]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05804954808687,42.31982910920691]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0589432432106,42.317373066468676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0094","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"266.3,1718.2 332.9,1179.5 381.7,1095.6 -0.0,576.0 -0.0,415.5 548.5,305.6 815.4,170.6 1001.7,0.0 1107.4,0.0 1251.5,1909.7 266.3,1718.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0094/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05951716872914,42.320778886422254]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0561296727412,42.3206205223207]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05644013594365,42.31693830571003]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05982763193158,42.31709666981158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p95","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0095","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1997.0 0.0,1812.5 158.0,1788.8 193.8,1163.7 322.6,151.6 163.1,134.0 906.4,41.0 1086.9,449.5 1214.5,1307.0 1368.0,1507.5 1368.0,1997.0 0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0095/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05709756611785,42.31699744230814]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05669469588884,42.31952105690796]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05174737202712,42.31908312982879]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05215024225613,42.316559515228974]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0096","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1096.1,147.6 1246.3,165.7 1225.4,393.4 1368.0,853.7 1368.0,1997.0 70.8,1997.0 162.3,1591.5 57.5,1364.3 121.0,507.8 35.6,73.7 1096.1,147.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05690445067535,42.31857981830614]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05726002185175,42.32113132848347]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05225785099177,42.32151782827731]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05190227981537,42.31896631809998]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p97","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0097","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1997.0 -0.0,-0.0 587.5,0.0 1159.8,648.2 1166.0,1827.3 1086.2,1997.0 -0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1166.0,483.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0616916,42.3183748]}},{"type":"Feature","properties":{"resourceCoords":[1166.0,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0627326,42.3160094]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p98","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0098","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.0,1534.7 194.2,201.7 1282.0,254.2 1302.2,1945.9 1247.0,1937.5 1249.5,1997.0 -0.0,1997.0 -0.0,1503.7 92.0,1534.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0098/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[913.0,1822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0608956,42.3151305]}},{"type":"Feature","properties":{"resourceCoords":[1295.0,1434.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0597313,42.3156635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boston, Massachusetts | 1899 | sanborn03693_011 p99","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T10:44:16Z","modified":"2026-09-21T10:44:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0099","type":"ImageService3","width":1368,"height":1997},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1997.0 -0.0,1659.4 55.4,1669.9 105.0,94.0 1104.1,150.6 1295.7,1041.4 1338.3,1997.0 -0.0,1997.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03693189904:03693_04_1899-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05933493556877,42.31778883217256]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0559974132478,42.31729006397315]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.056975168439,42.31366198493814]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1997.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06031269075997,42.31416075313756]}}]}}]}