{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03701_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Cambridge, Massachusetts | 1900 | 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":"98"},{"label":"placed","value":"79"},{"label":"unplaced","value":"19"},{"label":"fit sources","value":"georef 59, georef-snap 16, snap:0 3, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.36653,-71.07659 +/-229m); p24 (tier 2, 42.36438,-71.09425 +/-1533m); p2__2 (tier 1, 42.37411,-71.09689 +/-109m); p30__1 (tier 1, 42.36263,-71.09029 +/-100m); p30__2 (tier 1, 42.36299,-71.08804 +/-240m); p42__2 (tier 1, 42.37171,-71.07851 +/-100m); p43__1 (tier 1, 42.37188,-71.07206 +/-124m); p43__2 (tier 1, 42.37030,-71.07240 +/-100m); p45 (tier 1, 42.36912,-71.07265 +/-126m); p46 (tier 1, 42.37050,-71.07172 +/-253m); p54 (tier 2, 42.36099,-71.09051 +/-235m); p58__1 (tier 2, 42.36334,-71.10985 +/-161m); p59 (tier 1, 42.36276,-71.11505 +/-254m); p80 (tier 1, 42.35606,-71.10206 +/-252m); p82 (tier 1, 42.35460,-71.10282 +/-234m); p83 (tier 1, 42.35755,-71.09890 +/-269m); p84__2 (tier 1, 42.35593,-71.09781 +/-137m); p88__1 (tier 1, 42.36044,-71.08576 +/-260m); p88__2 (tier 1, 42.35980,-71.08706 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p10","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0010","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.4,943.5 0.0,902.6 0.0,396.7 182.1,441.8 184.2,291.7 1229.7,306.6 1330.8,332.2 1298.3,477.7 1463.0,479.7 1463.0,2097.0 1402.5,2097.0 1408.1,1650.9 1297.0,1710.5 1140.4,1901.5 998.3,1807.4 164.8,1791.5 175.4,943.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[628.0,1501.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0887897,42.3730061]}},{"type":"Feature","properties":{"resourceCoords":[628.0,787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0904843,42.3732078]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p11","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0011","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"860.9,1858.1 386.0,1832.5 372.4,1441.1 269.4,1286.8 -0.0,1466.5 -0.0,-0.0 32.3,0.0 44.5,627.5 152.5,626.0 154.2,523.8 156.6,225.2 1223.8,181.5 860.9,1858.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[662.0,1513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1104701,42.3675245]}},{"type":"Feature","properties":{"resourceCoords":[386.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11141,42.3672332]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0012","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.7,1698.7 107.9,2097.0 -0.0,2097.0 -0.0,-0.0 266.9,0.0 244.5,246.0 1203.8,288.3 1037.3,1674.0 119.7,1698.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0012/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10868196072136,42.37282881078834]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1054933130131,42.37170045329001]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10766711112556,42.368299957352534]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11085575883382,42.369428314850865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p13","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"11"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0013","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"960.6,1437.3 957.8,1948.3 190.3,1933.9 89.2,178.7 1064.7,159.0 1237.1,1415.7 960.6,1437.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[957.0,699.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1076864,42.3678508]}},{"type":"Feature","properties":{"resourceCoords":[957.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1056907,42.3666011]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0014","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1339.8,2097.0 84.8,2097.0 142.2,1670.0 -0.0,1691.0 -0.0,298.5 1277.5,202.9 1314.7,638.5 1463.0,621.0 1463.0,882.3 1407.5,911.3 1339.8,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10597138435091,42.37188712838377]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10297965735529,42.370480623868964]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10568926719894,42.36729008133896]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10868099419456,42.36869658585376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p15","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0015","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1371.3,1746.5 285.1,1796.4 302.9,1534.2 153.4,1540.8 145.9,1100.9 88.0,1101.0 89.8,0.0 1352.5,0.0 1371.3,1746.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[906.0,521.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.101339,42.370621]}},{"type":"Feature","properties":{"resourceCoords":[88.0,1101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1037445,42.3703991]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p16","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0016","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"334.5,1768.2 326.2,0.0 1195.3,0.0 1290.0,1722.2 334.5,1768.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[830.0,1122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0999606,42.368905]}},{"type":"Feature","properties":{"resourceCoords":[830.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0988397,42.3704713]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p17","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0017","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"314.4,1944.3 378.8,0.0 753.7,0.0 751.8,215.8 1131.8,219.4 1149.0,1949.0 314.4,1944.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[752.0,327.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0975414,42.3693311]}},{"type":"Feature","properties":{"resourceCoords":[1149.0,1949.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0982045,42.366375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p18","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0018","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1187.8,1888.9 227.6,1817.7 214.2,41.9 1005.7,412.7 1187.8,1888.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[604.0,224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0955074,42.3693548]}},{"type":"Feature","properties":{"resourceCoords":[1082.0,1022.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.095193,42.3677063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p19","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"25"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0019","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.2,1908.4 164.3,342.1 1098.8,154.5 885.7,724.0 1117.3,849.1 1254.5,1006.5 1315.6,1819.3 146.2,1908.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,1051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0932339,42.367489]}},{"type":"Feature","properties":{"resourceCoords":[498.0,278.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.095193,42.3677063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p1 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3558.4"},{"label":"split_canvas_w","value":"5852.0"},{"label":"split_canvas_h","value":"4829.6"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.0,1822.1 281.5,1789.5 1037.8,1824.5 1025.2,1570.1 1269.9,1501.0 1331.5,1558.7 1358.7,1468.9 1337.1,1475.5 1184.3,893.4 723.6,899.7 236.8,1463.8 0.0,1470.1 -0.0,2042.9 177.5,1995.8 171.0,1822.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[171.0,1822.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1034531,42.374077]}},{"type":"Feature","properties":{"resourceCoords":[1386.0,1579.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.100537,42.3734797]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p1 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5852.0"},{"label":"split_canvas_h","value":"5880.4"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,925.5 570.6,1077.0 723.6,899.7 1463.0,889.6 1463.0,0.0 131.9,0.0 151.5,602.8 0.0,560.9 0.0,925.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[152.0,603.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1047543,42.3742425]}},{"type":"Feature","properties":{"resourceCoords":[1249.0,109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1053723,42.3763341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p20","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"31"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0020","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"445.2,984.7 262.1,738.4 148.6,668.7 471.1,153.0 981.5,152.4 985.4,337.8 1137.1,608.4 1291.8,517.3 1352.0,569.1 1460.0,582.4 1460.0,1226.0 1223.7,1199.5 1146.8,1926.7 351.3,1828.1 445.2,984.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[807.0,1353.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0917673,42.3687543]}},{"type":"Feature","properties":{"resourceCoords":[471.0,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094789,42.368764]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p21","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0021","type":"ImageService3","width":1467,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1222.4,1756.5 940.6,1874.5 731.0,1888.0 731.2,1927.7 -0.0,1932.2 -0.0,230.9 954.2,21.5 1172.1,1032.0 1118.3,1066.3 1246.6,1697.5 1222.4,1756.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[208.0,1553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0910336,42.370036]}},{"type":"Feature","properties":{"resourceCoords":[208.0,186.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0897783,42.3723023]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0022","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1460.0,136.0 1334.2,136.9 1344.8,2097.0 1304.5,2097.0 1328.8,1996.5 573.2,1669.3 86.5,1561.4 277.3,742.0 486.2,773.4 820.9,689.5 835.5,22.1 1460.0,0.0 1460.0,136.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09051834547775,42.370522156113836]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08705153357397,42.37007160404174]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08792128988725,42.366366769390204]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09138810179103,42.3668173214623]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p23","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0023","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.3,1772.4 144.2,73.4 645.0,66.7 1460.0,213.2 1460.0,378.9 1460.0,380.4 1445.8,1603.7 150.3,1772.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[151.0,954.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0917831,42.3662965]}},{"type":"Feature","properties":{"resourceCoords":[151.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0926213,42.3648596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p25","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0025","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"476.0,318.4 1097.1,294.4 1097.1,294.1 1460.0,294.1 1460.0,1865.3 1281.0,1866.0 1281.3,1787.2 199.2,1783.2 447.9,1093.0 0.0,934.8 0.0,159.7 466.3,270.1 476.0,318.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[518.0,1866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0844203,42.3660057]}},{"type":"Feature","properties":{"resourceCoords":[1281.0,1866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.084096,42.367365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p26","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0026","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1329.7,1779.5 361.7,1776.6 365.9,281.0 1322.8,283.5 1329.7,1779.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[562.0,1177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0855848,42.3682496]}},{"type":"Feature","properties":{"resourceCoords":[1322.0,1177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0852694,42.3695932]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p27","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0027","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.7,555.9 268.4,555.3 267.3,0.0 1290.3,0.0 1298.0,1992.8 146.5,1998.7 133.7,555.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[900.0,1007.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0856908,42.3710541]}},{"type":"Feature","properties":{"resourceCoords":[519.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0851089,42.3702771]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p28","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0028","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"632.6,1770.0 222.0,1766.0 222.0,295.0 1053.3,300.4 1196.2,392.5 1350.0,200.0 1460.0,138.9 1460.0,1325.8 763.7,1328.2 632.6,1770.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[222.0,1766.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0847839,42.3716618]}},{"type":"Feature","properties":{"resourceCoords":[222.0,295.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0882775,42.372111]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0029","type":"ImageService3","width":1456,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1456.0,0.0 1456.0,1455.5 1405.2,1567.6 1296.0,1518.0 1273.0,1740.3 664.4,1735.2 508.1,1824.8 505.6,2097.0 0.0,2097.0 -0.0,0.0 1456.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08871082892267,42.36020502886356]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08838603104468,42.362824396597816]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.083316246441,42.36247630442368]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.083641044319,42.359856936689425]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p2 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3875.6"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0002","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.0,73.0 168.3,1887.5 968.8,2095.7 776.6,98.0 171.0,73.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[171.0,1080.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0981456,42.3733859]}},{"type":"Feature","properties":{"resourceCoords":[171.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1005288,42.3736874]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p3","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0003","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1989.1 -0.0,-0.0 169.9,468.9 732.5,259.6 740.9,415.8 1260.7,241.4 1247.8,1938.3 -0.0,1989.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[732.0,905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1055462,42.3732479]}},{"type":"Feature","properties":{"resourceCoords":[732.0,260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1047543,42.3742425]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0031","type":"ImageService3","width":1462,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1462.0,0.0 1462.0,766.4 1316.1,817.6 1347.5,906.2 927.7,1064.8 928.0,1701.1 636.5,1710.8 507.0,1417.5 0.0,1641.6 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08800526564339,42.36391092500657]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08631399324284,42.36612348522721]}},{"type":"Feature","properties":{"resourceCoords":[1462.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0820489833644,42.36431842899414]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08374025576495,42.3621058687735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p32","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0032","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"571.2,611.3 783.3,33.0 1219.9,27.1 1208.4,1203.0 1304.1,1204.8 1303.8,1938.7 1461.0,1938.8 1461.0,2097.0 0.0,2097.0 0.0,1292.7 180.9,1146.7 279.5,526.0 571.2,611.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[571.0,611.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.083472,42.363851]}},{"type":"Feature","properties":{"resourceCoords":[783.0,33.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0847663,42.3643983]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p33","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0033","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 1248.7,0.0 1245.1,1118.2 1461.0,1179.5 1461.0,1996.6 868.5,1994.2 867.5,1869.5 259.4,1873.3 260.6,2006.7 103.0,2008.7 96.0,1271.8 0.0,1271.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[861.0,1032.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0819996,42.3663837]}},{"type":"Feature","properties":{"resourceCoords":[92.0,848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0827668,42.3650925]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p34","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0034","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.0,0.0 1323.8,0.0 1319.0,1847.6 381.2,1856.5 394.9,1189.6 166.6,1122.6 174.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[555.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0839385,42.3680382]}},{"type":"Feature","properties":{"resourceCoords":[172.0,1997.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0795412,42.3667681]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p35","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0035","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"136.4,1722.2 138.7,342.3 1300.5,336.5 1305.7,1711.2 136.4,1722.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[902.0,338.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0833077,42.3707466]}},{"type":"Feature","properties":{"resourceCoords":[520.0,1718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0801705,42.3696383]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p36","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0036","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.4,1818.7 135.0,436.0 545.7,441.4 678.3,0.0 1461.0,0.0 1461.0,2097.0 1176.2,2097.0 1400.9,1613.2 1332.7,1613.5 1233.0,1832.5 130.4,1818.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[910.0,1566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0817853,42.372684]}},{"type":"Feature","properties":{"resourceCoords":[135.0,436.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0847839,42.3716618]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0037","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.7,202.8 775.0,202.4 795.3,0.0 907.6,26.0 919.1,0.0 1461.0,0.0 1461.0,313.4 1298.4,933.4 1107.3,1068.3 1073.4,1579.7 460.2,1541.3 425.4,2097.0 0.0,2097.0 0.0,295.1 157.7,202.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08488848057934,42.36086923039314]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0845356678604,42.36345801047741]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07954219784729,42.363081190972295]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07989501056623,42.36049241088803]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0038","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,1487.7 298.4,1488.8 307.1,33.2 148.4,32.7 148.5,0.0 850.4,0.0 832.4,373.7 935.8,374.6 1118.5,0.0 1461.0,0.0 1461.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08028289168648,42.3651236018693]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0768036261261,42.3646963565423]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07762774975153,42.36098041422147]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08110701531191,42.361407659548476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0039","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"336.4,0.0 945.1,0.0 1234.9,129.3 1461.0,1629.2 1461.0,1717.0 1252.0,2011.1 1252.8,2097.0 0.0,2097.0 0.0,1460.6 103.5,1459.6 0.0,827.0 336.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08039814993141,42.3644717797775]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07979564432652,42.36703604134914]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07484919709269,42.36639257407553]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07545170269758,42.3638283125039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p4","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0004","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1123.9,0.0 1156.0,1889.5 220.8,1910.0 249.5,38.0 355.9,0.0 1123.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1156.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1037445,42.3703991]}},{"type":"Feature","properties":{"resourceCoords":[249.0,38.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1034531,42.374077]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p40","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0040","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1610.3 211.2,1712.2 212.0,1625.1 0.0,1522.2 0.0,137.1 303.2,137.4 307.3,0.0 1248.3,0.0 1238.5,844.1 1117.2,843.3 1112.2,1602.5 1461.0,1604.8 1461.0,2097.0 0.0,2097.0 0.0,1610.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[96.0,837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0778774,42.3665632]}},{"type":"Feature","properties":{"resourceCoords":[96.0,139.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0795412,42.3667681]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p41","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0041","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.1,1346.0 126.8,133.3 1288.9,127.3 1287.8,1344.9 1357.8,1349.0 1286.0,1523.0 1222.1,1957.8 1148.8,2097.0 0.0,2097.0 0.0,1346.1 120.1,1346.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[891.0,653.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0787532,42.3701584]}},{"type":"Feature","properties":{"resourceCoords":[891.0,1342.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0770944,42.3699458]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0042__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p42 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5844.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0042__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0042","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"755.2,1281.8 782.3,1365.2 858.3,1203.2 1168.7,1331.3 1461.0,1331.3 1461.0,476.7 1199.6,475.7 1422.8,0.0 1355.5,0.0 1256.5,215.3 170.5,197.7 156.3,2097.0 452.7,2097.0 755.2,1281.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0042__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[557.0,886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0796841,42.3717248]}},{"type":"Feature","properties":{"resourceCoords":[161.0,1404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0785932,42.3708649]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0044","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1101.5 204.1,1011.1 174.0,115.2 232.7,183.8 240.1,0.0 1461.0,0.0 1461.0,2097.0 0.0,2097.0 0.0,1931.7 94.2,1893.3 0.0,1101.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07910061816895,42.37180807444155]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07725672021071,42.37399700053252]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07303385402201,42.37202794896359]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07487775198027,42.369839022872625]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p47","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0047","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1321.3,1855.4 587.0,1814.3 87.5,1771.2 83.8,295.2 1194.4,98.1 1355.1,1367.2 1321.3,1855.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1275.0,673.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1024078,42.3673706]}},{"type":"Feature","properties":{"resourceCoords":[1194.0,98.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1017489,42.3682994]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p48","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0048","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"132.0,1845.0 240.6,1353.9 273.8,73.1 1227.1,42.5 1224.7,1546.0 1134.3,2058.2 132.0,1845.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1228.0,716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.100395,42.366499]}},{"type":"Feature","properties":{"resourceCoords":[703.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.10081,42.367969]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p49","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0049","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1168.6,1783.4 1215.1,1826.0 1366.2,1789.9 1379.8,2053.1 125.7,1694.1 251.1,1190.0 334.1,67.5 1170.0,74.8 1168.6,1783.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1170.0,667.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0987656,42.365398]}},{"type":"Feature","properties":{"resourceCoords":[1170.0,364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0984781,42.3658987]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p5","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0005","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1350.1,1615.4 85.0,1618.1 90.7,623.2 64.4,555.7 315.5,492.6 379.3,549.4 405.3,454.4 1332.3,144.9 1350.1,1615.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[724.0,347.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0996684,42.3735832]}},{"type":"Feature","properties":{"resourceCoords":[1340.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0989836,42.3722095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p50","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"19"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0050","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.3,1619.3 342.9,1827.9 315.4,1873.2 127.3,1793.9 347.6,81.3 1296.7,272.8 1325.3,1619.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[597.0,1051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0979075,42.3652089]}},{"type":"Feature","properties":{"resourceCoords":[597.0,1383.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0981248,42.3646402]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p51","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0051","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"724.6,362.9 1202.8,450.3 1059.1,1168.2 767.9,1770.9 242.2,1622.5 264.3,340.5 724.6,362.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[254.0,940.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0952707,42.3630994]}},{"type":"Feature","properties":{"resourceCoords":[1203.0,450.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0962551,42.3648558]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0052","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.8,466.7 1340.0,180.5 1338.8,1755.2 181.3,1850.5 211.5,1183.0 61.8,466.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09731908748071,42.36514837970405]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09567925428043,42.36746011940239]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09121074437725,42.365705197904475]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09285057757754,42.36339345820614]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0053","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"165.1,0.0 1458.0,0.0 1458.0,2097.0 940.1,2097.0 153.6,1428.0 95.6,1496.1 28.4,1109.9 165.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09294762981472,42.36504484544345]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08954444575484,42.364328761493454]}},{"type":"Feature","properties":{"resourceCoords":[1458.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09092855424156,42.36068658439264]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09433173830143,42.361402668342635]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p55","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"7"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0055","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"903.3,87.7 1328.7,91.9 1336.4,1084.3 1210.8,1736.7 1216.9,1903.5 1107.2,1919.7 1129.3,2097.0 -0.0,2097.0 0.0,0.0 893.6,23.6 903.3,87.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,1960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1148789,42.3643978]}},{"type":"Feature","properties":{"resourceCoords":[1127.0,90.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1140115,42.3677372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p56","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0056","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1365.8,598.2 1333.7,1924.7 38.6,1908.1 57.5,1742.1 279.4,1115.5 420.1,132.6 -0.0,64.8 -0.0,0.0 1454.0,0.0 1454.0,184.7 1249.2,516.2 1365.8,598.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[369.0,1913.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1130959,42.36455]}},{"type":"Feature","properties":{"resourceCoords":[420.0,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1135224,42.3677257]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p57","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0057","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.1,1365.3 1180.5,88.7 1345.5,222.8 1369.4,1830.2 42.5,1833.8 236.8,1566.2 0.1,1365.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.11103,42.366409]}},{"type":"Feature","properties":{"resourceCoords":[1353.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1081286,42.3649763]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0058__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p58 [2]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5816.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0058__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0058","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"954.0,2097.0 950.6,1912.4 1184.2,1931.2 1206.0,775.2 1159.6,773.7 1226.2,632.5 1195.2,550.7 1202.9,114.9 1136.8,51.8 132.9,1129.7 733.6,1688.2 543.9,2097.0 954.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0058__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1195.0,1043.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1086703,42.3636317]}},{"type":"Feature","properties":{"resourceCoords":[631.0,594.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1090063,42.3649009]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p6","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0006","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"296.6,1815.5 299.0,358.6 1436.6,0.0 1463.0,1541.0 1142.2,1423.2 1170.1,1820.1 296.6,1815.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[563.0,1944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0993461,42.3706742]}},{"type":"Feature","properties":{"resourceCoords":[299.0,359.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0981456,42.3733859]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p60 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5816.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1344.9,1618.4 1191.7,1453.9 1235.5,1410.4 1205.1,1410.6 1073.2,1196.8 961.4,1091.9 1409.4,938.6 1397.0,122.0 -0.0,142.0 -0.0,1418.5 133.8,1375.2 129.1,1695.7 480.2,2065.8 748.4,1815.2 943.0,1994.5 1344.9,1618.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[119.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1137794,42.3638221]}},{"type":"Feature","properties":{"resourceCoords":[1397.0,122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1107719,42.3647494]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p60 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4113.2"},{"label":"split_canvas_y","value":"3859.6"},{"label":"split_canvas_w","value":"1702.8"},{"label":"split_canvas_h","value":"1782.8"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1437.6,971.0 1158.2,1075.4 1139.3,1304.0 1161.3,1339.5 1402.5,1355.5 1437.6,971.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0060__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1028.3,964.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11219426854946,42.36174021854924]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,964.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11138180731784,42.361290656627126]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,1410.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1120157504333,42.36065629380218]}},{"type":"Feature","properties":{"resourceCoords":[1028.3,1410.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1128282116649,42.36110585572429]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p61","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0061","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.7,-0.0 193.0,89.2 232.7,-0.0 293.5,-0.0 487.9,179.1 1264.7,157.5 1319.5,1345.0 1183.6,1552.8 1210.6,2097.0 -0.0,2097.0 0.0,-0.0 93.7,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1140443,42.362519]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1114277,42.3607614]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11484189999999,42.3579863]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1174585,42.3597439]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p62","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0062","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1235.8,200.3 1271.1,1880.8 -0.0,1913.9 -0.0,60.5 317.6,59.1 487.1,191.4 1235.8,200.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1239.0,1107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1110773,42.3591113]}},{"type":"Feature","properties":{"resourceCoords":[713.0,206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1135681,42.3594165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0063","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"949.4,0.0 954.0,1864.5 600.6,1874.3 591.9,1647.9 -0.0,1784.6 0.0,0.0 949.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11639365141129,42.357296333601525]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11416894342803,42.35929513270377]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11029522133137,42.35690742178222]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11251992931463,42.35490862267997]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p64","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0064","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2097.0 -0.0,593.4 215.8,635.9 328.1,77.0 913.7,196.4 951.8,0.0 1045.5,0.0 1023.2,217.8 1460.0,306.1 1460.0,2097.0 -0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[613.0,478.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1109575,42.3559221]}},{"type":"Feature","properties":{"resourceCoords":[680.0,149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1104454,42.3564065]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0065","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1155.2,373.7 1167.5,251.1 1375.4,271.1 1454.0,66.7 1454.0,2097.0 616.7,2097.0 456.5,535.1 615.0,549.0 1155.2,373.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10912431412437,42.356758389129894]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10617882707797,42.35536288591949]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10888324059668,42.35220146074866]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11182872764309,42.35359696395906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p66","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0066","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"236.6,1580.0 234.1,965.8 457.0,943.3 437.7,849.5 233.0,851.6 232.3,240.1 1271.9,244.5 1285.5,1735.9 584.2,1734.9 583.6,2097.0 460.8,2097.0 236.6,1580.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[396.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1109026,42.3570429]}},{"type":"Feature","properties":{"resourceCoords":[756.0,1735.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1075157,42.3559013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p67","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"19"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0067","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.7,185.3 1250.6,218.7 1254.7,1092.0 1365.2,1092.0 1366.8,1849.8 93.1,1864.2 74.7,185.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[444.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1105019,42.3596313]}},{"type":"Feature","properties":{"resourceCoords":[1001.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1096505,42.3604049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p68","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0068","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1341.3,1824.2 240.3,1836.8 235.6,1083.5 125.8,1084.0 118.1,215.8 353.6,225.0 360.9,0.0 652.0,0.0 628.9,232.6 1210.1,254.3 1214.2,1079.5 1334.0,1079.0 1341.3,1824.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[354.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1105291,42.3620553]}},{"type":"Feature","properties":{"resourceCoords":[1334.0,1079.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1074049,42.3624451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p69","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"20"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0069","type":"ImageService3","width":1454,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"231.6,1836.5 214.9,1093.5 95.5,1095.5 81.0,272.8 650.6,286.6 652.4,240.5 792.4,307.6 874.0,277.2 1307.2,287.4 1328.0,1817.1 231.6,1836.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[664.0,1086.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1067124,42.3630743]}},{"type":"Feature","properties":{"resourceCoords":[993.0,404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1074708,42.3643221]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0007","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"216.0,481.5 212.4,107.5 751.1,108.5 613.5,418.4 1303.1,484.9 1314.6,1480.5 1463.0,1460.0 1463.0,2097.0 1112.7,2097.0 1092.5,1950.3 983.8,1951.4 917.1,1907.8 776.5,2018.9 589.2,1769.5 560.1,1585.4 54.9,1653.4 414.3,856.2 0.0,862.8 0.0,480.6 216.0,481.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09849788759287,42.369860171607186]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09708686800805,42.37226697438631]}},{"type":"Feature","properties":{"resourceCoords":[1463.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09245014029318,42.37076220425763]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.093861159878,42.36835540147851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p70","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0070","type":"ImageService3","width":1460,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"247.3,207.8 340.5,300.4 1307.7,318.1 1297.9,1819.7 162.1,1809.0 182.2,271.8 247.3,207.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[541.0,1067.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1051376,42.3645051]}},{"type":"Feature","properties":{"resourceCoords":[906.0,904.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1048938,42.3652001]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p71","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0071","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1182.2,304.7 1150.0,1786.2 629.7,1781.9 632.1,2097.0 116.2,2097.0 114.5,290.0 1182.2,304.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,1106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1072518,42.3581117]}},{"type":"Feature","properties":{"resourceCoords":[112.0,1106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1080232,42.3573737]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p72","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0072","type":"ImageService3","width":1457,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"968.9,1844.5 -0.0,1805.8 -0.0,319.5 1229.0,314.0 1226.9,1103.0 1143.3,1104.5 1138.5,1702.3 967.9,1675.9 968.9,1844.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[786.0,1111.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1052898,42.3599749]}},{"type":"Feature","properties":{"resourceCoords":[1229.0,314.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1061163,42.3614864]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p73","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"18"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0073","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"83.0,994.0 78.7,210.8 1262.0,202.9 1266.2,921.9 1109.6,936.3 1108.2,1778.8 907.5,1783.8 -0.0,1740.0 -0.0,996.2 83.0,994.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[607.0,206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.105308,42.362227]}},{"type":"Feature","properties":{"resourceCoords":[533.0,978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1039695,42.3612422]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p74","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0074","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.2,1780.3 -0.0,1808.9 -0.0,949.5 159.7,934.6 154.3,201.2 1310.3,193.1 1325.2,1780.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1313.0,456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1020703,42.3644345]}},{"type":"Feature","properties":{"resourceCoords":[544.0,1801.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1007587,42.3618769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p75","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0075","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.1,1974.0 161.2,2097.0 0.0,2097.0 0.0,1601.5 168.7,1621.7 180.0,573.5 431.9,492.0 357.6,354.8 379.7,302.8 742.2,201.8 739.9,405.4 792.1,413.8 1354.8,1242.5 163.1,1974.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[992.0,1058.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0974813,42.3635742]}},{"type":"Feature","properties":{"resourceCoords":[705.0,1643.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0967938,42.3625294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p76","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0076","type":"ImageService3","width":1458,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"639.0,1589.6 19.4,804.8 302.7,375.1 363.9,380.1 409.6,380.9 579.6,379.5 938.0,387.0 1319.6,386.2 1312.0,1666.0 849.3,1663.7 639.0,1589.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[938.0,387.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0967938,42.3625294]}},{"type":"Feature","properties":{"resourceCoords":[1312.0,1666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0936343,42.3629767]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0077","type":"ImageService3","width":1452,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"539.8,1617.9 536.0,1651.0 231.9,1607.5 222.2,104.1 1259.0,96.8 1275.0,171.4 726.4,1624.2 539.8,1617.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09987298137216,42.363363603943334]}},{"type":"Feature","properties":{"resourceCoords":[1452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09711664667265,42.3617155195965]}},{"type":"Feature","properties":{"resourceCoords":[1452.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10031529124251,42.35875335606511]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10307162594201,42.36040144041194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0078","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1073.8,2097.0 1086.5,1815.0 960.3,1809.3 927.6,1965.8 113.1,2068.6 174.6,1773.8 -0.0,1769.0 -0.0,1735.4 187.2,1720.3 545.4,298.4 1034.4,236.2 1014.4,77.3 1401.3,31.9 1035.4,1479.4 1461.0,1631.4 1461.0,2097.0 1073.8,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0983293743636,42.362662523228394]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09584389547264,42.360791437334036]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09945292080346,42.3581367687972]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10193839969442,42.36000785469156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0079","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1461.0,1472.9 227.3,1689.5 166.1,1075.8 -0.0,1103.7 -0.0,931.4 149.4,908.5 48.9,-0.0 546.8,-0.0 498.6,297.7 1308.8,158.0 1332.0,15.0 1461.0,-0.0 1461.0,1472.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1019706316694,42.36092319832747]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09960468619279,42.35897327649861]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10336566774276,42.35644620715477]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10573161321938,42.35839612898363]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p8","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"21"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0008","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1409.4,2097.0 345.8,2097.0 352.7,1505.8 396.8,1470.2 204.0,1495.5 204.0,502.0 1043.7,525.6 1409.4,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[204.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0945053,42.371133]}},{"type":"Feature","properties":{"resourceCoords":[204.0,502.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096169,42.371656]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p81","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0081","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"748.2,1885.8 691.0,2097.0 118.3,2097.0 118.1,1392.2 447.5,1391.6 435.4,872.0 118.0,877.0 128.2,0.0 1461.0,0.0 1461.0,2097.0 769.9,2097.0 748.2,1885.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[118.0,877.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1059571,42.3573675]}},{"type":"Feature","properties":{"resourceCoords":[118.0,517.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1054213,42.3578714]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0084__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p84 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5844.0"},{"label":"split_canvas_h","value":"8388.0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0084__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0084","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1110.0,2097.0 1110.1,770.3 1461.0,770.3 1461.0,-0.0 11.0,-0.0 -0.0,2097.0 1110.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0084__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0933262733458,42.35933528426564]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09198396508887,42.356917653235875]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09668747191729,42.35549625120056]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09802978017422,42.35791388223033]}},{"type":"Feature","properties":{"resourceCoords":[630.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0930839,42.3581911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p85","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0085","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"616.2,290.5 1233.3,99.3 1143.8,2054.2 1461.0,2068.4 1461.0,2097.0 154.2,2097.0 0.8,586.1 616.2,290.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[546.0,323.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0948847,42.3601506]}},{"type":"Feature","properties":{"resourceCoords":[1.0,586.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0960005,42.3608275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0086","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1159.0,198.6 1368.8,0.0 1461.0,0.0 1461.0,1749.2 357.2,1520.1 268.3,909.1 61.3,204.3 1159.0,198.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09638798828968,42.36106489527499]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09353167644308,42.36248924348431]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0907843203242,42.35943851703912]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0936406321708,42.358014168829804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p87","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0087","type":"ImageService3","width":1461,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1461.0,-0.0 1450.0,1758.0 -0.0,1758.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0893730267842,42.360508700578514]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08803071852728,42.35809106954875]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0927342253557,42.35666966751344]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2097.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09407653361262,42.3590872985432]}},{"type":"Feature","properties":{"resourceCoords":[619.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0930839,42.3581911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1900 | sanborn03701_002 p9","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T18:46:56Z","modified":"2026-09-21T18:46:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0009","type":"ImageService3","width":1463,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.0,1924.0 173.8,52.9 977.9,259.7 977.2,0.0 1463.0,0.0 1463.0,2097.0 1293.3,2097.0 1324.0,1950.4 1251.0,1928.3 171.0,1924.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701190001:03701_01_1900-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1377.0,362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0950155,42.3751399]}},{"type":"Feature","properties":{"resourceCoords":[171.0,1924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0918297,42.3725686]}}]}}]}