{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03701_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Cambridge, Massachusetts | 1935 | 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":"96"},{"label":"placed","value":"84"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef 45, georef-snap 41, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 42.38215,-71.12612 +/-2263m); p202__2 (tier 1, 42.39406,-71.14170 +/-100m); p202__3 (tier 1, 42.39258,-71.13633 +/-100m); p202__4 (tier 1, 42.39357,-71.13525 +/-100m); p223__2 (tier 1, 42.38784,-71.11855 +/-100m); p237__2 (tier 1, 42.37854,-71.12981 +/-102m); p260__1 (tier 1, 42.38430,-71.12398 +/-100m); p262__1 (tier 2, 42.38766,-71.13828 +/-1754m); p262__2 (tier 1, 42.39189,-71.15653 +/-185m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0201/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p201","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0201/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0201","type":"ImageService3","width":1622,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"630.5,1648.3 292.4,1433.1 161.4,1302.3 216.9,944.0 -0.0,982.2 -0.0,865.6 862.5,224.2 874.1,0.0 936.1,0.0 998.6,125.0 1157.9,259.0 1465.8,278.8 1455.4,1575.0 653.0,1504.2 630.5,1648.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0201/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12096025202791,42.374635096791245]}},{"type":"Feature","properties":{"resourceCoords":[1622.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1172943555011,42.37347850397769]}},{"type":"Feature","properties":{"resourceCoords":[1622.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11913454472473,42.37025001753872]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12280044125154,42.37140661035228]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202__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 | 1935 | sanborn03701_004 p202 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6440.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202","type":"ImageService3","width":1610,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"947.5,1920.0 998.0,1920.0 1065.4,1920.0 1216.0,1920.0 1319.7,1920.0 1298.2,1064.3 1304.1,1036.8 1298.3,880.4 1359.1,681.3 1232.7,480.2 1247.3,408.4 1233.6,402.5 1207.8,293.9 190.4,345.1 221.7,1633.5 253.4,1786.5 605.5,1758.8 604.7,1708.4 457.0,1705.9 281.3,1711.0 281.3,1703.0 281.2,1678.8 280.7,1417.7 598.1,1403.0 601.7,1402.8 599.1,1383.4 835.9,1392.0 850.0,1391.4 849.8,1392.5 839.4,1476.6 849.2,1712.4 850.0,1739.6 971.8,1730.0 947.5,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1387.0,282.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.115147,42.3723093]}},{"type":"Feature","properties":{"resourceCoords":[216.0,1339.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1188878,42.3714443]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202s/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p202s","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202s/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202s","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"624.9,982.8 659.8,1034.2 384.9,1017.4 384.6,981.8 624.9,982.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0202s/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[225.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1188878,42.3714443]}},{"type":"Feature","properties":{"resourceCoords":[909.0,1754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1177537,42.3702545]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0203/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p203","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0203/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0203","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"917.9,1787.1 321.1,1823.7 372.6,1486.5 227.2,862.2 276.2,734.3 850.9,106.8 644.8,0.0 1613.0,0.0 1613.0,147.1 1431.4,143.6 1250.4,944.1 1024.3,1419.3 917.9,1787.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0203/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1239129160952,42.37752151572952]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12041173013786,42.37604695665898]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12277101253405,42.37294646085233]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12627219849138,42.37442101992287]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p204","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0204","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"530.9,1743.3 586.5,1920.0 -0.0,1920.0 36.1,1903.5 45.7,1517.7 146.8,965.5 115.9,169.7 560.1,61.8 654.8,-0.0 1257.2,-0.0 1546.9,395.1 1497.8,350.7 1440.6,373.0 1510.4,584.4 946.6,1495.4 969.8,1555.1 898.6,1577.8 865.2,1635.2 530.9,1743.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0204/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1208949327444,42.37635377155693]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11803503875493,42.37428234025865]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12134924809055,42.371749695631316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12420914208003,42.37382112692959]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p205","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"6"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0205/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0205","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1357.2,496.5 1358.7,638.0 1613.0,638.4 1613.0,1920.0 -0.0,1920.0 -0.0,993.5 236.6,1041.1 224.9,330.5 802.1,320.7 1357.2,496.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0205/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[736.0,731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1248196,42.3732079]}},{"type":"Feature","properties":{"resourceCoords":[1359.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1233278,42.3728341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p206","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0206/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0206","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1425.7,661.3 1333.1,1682.2 1287.1,1688.1 1264.6,1920.0 -0.0,1920.0 -0.0,1655.4 522.0,1659.6 540.1,375.2 284.2,372.8 285.1,45.4 635.5,44.5 683.8,0.0 759.0,0.0 775.5,42.4 971.4,0.0 946.5,362.6 1425.7,661.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0206/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1235441993907,42.3736845107391]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11996460202903,42.3723508763599]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12209828420613,42.36918076181399]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1256778815678,42.370514396193194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0207/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p207","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0207/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0207","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.5,211.2 845.6,153.0 913.7,298.5 1613.0,148.6 1613.0,1920.0 -0.0,1920.0 -0.0,1409.3 45.9,1398.9 38.5,211.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0207/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12073116684554,42.37200249747058]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11739400349721,42.37044198005478]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11989060063709,42.36748647750072]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12322776398543,42.36904699491652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0208/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p208","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0208/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0208","type":"ImageService3","width":1626,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1504.2,1202.5 1491.8,1876.6 1579.4,1920.0 -0.0,1920.0 -0.0,733.4 103.8,781.4 441.5,0.0 1576.7,527.1 1504.2,1202.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0208/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1498.0,1354.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1135121,42.3685798]}},{"type":"Feature","properties":{"resourceCoords":[1047.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1146409,42.3693234]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p209","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0209/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0209","type":"ImageService3","width":1619,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.3,251.3 1443.8,676.1 1146.7,1702.1 195.4,1541.8 221.3,251.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0209/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11403981198738,42.374896829707936]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11011822138266,42.37436823074398]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11096081002681,42.37090818596602]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11488240063153,42.371436784929976]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0210/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p210","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0210/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0210","type":"ImageService3","width":1622,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1622.0,1479.8 48.0,1328.7 53.1,1153.0 128.2,969.5 41.2,808.5 906.7,554.9 1560.5,548.3 1464.8,1389.2 1622.0,1479.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0210/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[582.0,564.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1142431,42.3720545]}},{"type":"Feature","properties":{"resourceCoords":[184.0,564.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.115147,42.3723093]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0211/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p211","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0211/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0211","type":"ImageService3","width":1619,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1619.0,1920.0 282.7,1920.0 299.4,188.1 1619.0,232.9 1619.0,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0211/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1113022412157,42.3737626898542]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10768829035719,42.372447309665404]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10978496286303,42.36925862407578]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11339891372154,42.37057400426458]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0212/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p212","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0212/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0212","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.3,669.9 362.1,669.5 220.7,604.6 231.0,455.7 1565.4,456.3 1563.0,0.0 1596.0,0.0 1596.0,1920.0 613.5,1920.0 324.6,1308.9 89.3,669.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0212/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[743.0,671.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1118601,42.3695726]}},{"type":"Feature","properties":{"resourceCoords":[1448.0,1091.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.110746,42.368306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0213/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p213","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0213/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0213","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"107.0,579.0 1596.0,578.0 1596.0,1648.8 121.1,1129.4 107.0,579.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0213/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1059.0,579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1110981,42.3750647]}},{"type":"Feature","properties":{"resourceCoords":[107.0,579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1134133,42.375365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p214","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0214/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0214","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"431.7,1578.0 99.5,568.5 1596.0,75.7 1596.0,1920.0 1489.2,1920.0 1485.5,1578.0 431.7,1578.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0214/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[669.0,1578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1097285,42.3727673]}},{"type":"Feature","properties":{"resourceCoords":[1179.0,1578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1086101,42.3723247]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0215/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p215","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0215/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0215","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"337.8,585.9 309.4,503.6 1249.1,44.5 1277.4,99.3 1267.5,1793.5 329.6,1796.2 337.8,585.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0215/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[329.0,1212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1108506,42.3761076]}},{"type":"Feature","properties":{"resourceCoords":[758.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1100615,42.374932]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0216/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p216","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0216/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0216","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1361.8,1920.0 1374.5,1881.9 188.5,1876.8 205.7,200.2 177.9,145.8 473.9,0.0 1596.0,0.0 1596.0,1920.0 1361.8,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0216/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[448.0,667.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1076861,42.3768789]}},{"type":"Feature","properties":{"resourceCoords":[583.0,667.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.107356,42.376837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0217/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p217","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0217/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0217","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"135.8,220.4 851.0,196.2 1054.0,749.8 1373.4,632.4 1348.2,951.3 1537.0,968.8 1520.9,1276.7 1442.1,1876.6 1596.0,1920.0 1152.8,1920.0 1167.2,1799.9 540.1,1598.5 475.5,1493.3 491.6,1223.4 259.4,1031.0 203.1,1024.6 79.8,964.5 111.1,897.2 -0.0,845.6 -0.0,417.7 136.1,327.1 135.8,220.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0217/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12060410020459,42.37936898623817]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11273938187058,42.378899231172404]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11349899826061,42.37186045747972]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12136371659462,42.372330212545485]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0218/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p218","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0218/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0218","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"682.4,1799.0 140.4,1585.0 272.8,1220.0 416.6,1174.2 187.8,578.8 -0.0,511.4 -0.0,0.0 1434.3,-0.0 1415.6,37.2 1378.1,1817.2 682.4,1799.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0218/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10919546381548,42.38303186306586]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1069103976915,42.37748865444873]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11587451573762,42.37544367422819]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1181595818616,42.38098688284531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0219/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p219","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0219/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0219","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1511.5,939.9 1274.6,1119.5 1288.3,1890.2 340.3,1879.8 278.7,896.4 176.5,670.3 -0.0,470.8 -0.0,0.0 665.5,-0.0 1511.5,939.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0219/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[772.0,1378.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1150515,42.3817278]}},{"type":"Feature","properties":{"resourceCoords":[666.0,322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1124419,42.3817895]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p220","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0220/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0220","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1447.2,1535.2 120.8,1537.8 109.2,895.5 1425.7,254.8 1454.0,329.2 1447.2,1535.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0220/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1446.0,957.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1108506,42.3761076]}},{"type":"Feature","properties":{"resourceCoords":[499.0,1537.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1134133,42.375365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0221/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p221","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0221/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0221","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1476.6,1706.3 108.3,1691.6 109.0,1648.7 88.2,1612.9 109.8,1596.9 132.0,199.3 838.1,209.6 838.2,160.9 1469.5,183.6 1498.7,569.9 1476.6,1706.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0221/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1489.0,894.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1161594,42.3830433]}},{"type":"Feature","properties":{"resourceCoords":[103.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1195067,42.383784]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0222/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p222","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0222/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0222","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.4,1413.2 100.2,375.1 148.9,376.1 158.4,150.5 1519.8,189.8 1470.2,1733.9 1531.3,1920.0 98.0,1920.0 95.8,1920.0 -0.0,1920.0 20.1,1427.0 66.4,1413.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0222/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12004491774293,42.38205086876773]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11610963567959,42.381915465168355]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11632860532086,42.37839371250468]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1202638873842,42.378529116104055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0223__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 | 1935 | sanborn03701_004 p223 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6384.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0223__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0223","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.6,565.4 31.8,1757.0 106.7,1857.9 778.1,1865.9 778.0,1817.8 1401.9,1838.5 1355.1,1376.8 1596.0,1351.8 1596.0,438.2 1084.9,430.9 874.8,291.9 875.4,0.0 -0.0,-0.0 43.6,565.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0223__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[91.0,1105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1192232,42.3858386]}},{"type":"Feature","properties":{"resourceCoords":[781.0,1365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.117555,42.3852766]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0224/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p224","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0224/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0224","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.2,1687.0 198.5,985.0 174.4,253.2 420.2,244.1 436.5,0.0 1596.0,0.0 1596.0,1428.0 1368.5,1605.0 1135.0,1691.5 145.2,1687.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0224/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11655881293726,42.38564537467357]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11265149135744,42.38564118726209]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11265826348051,42.382144662271784]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11656558506033,42.38214884968327]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0225/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p225","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0225/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0225","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1221.8 228.0,1206.9 291.8,1078.6 262.6,1032.2 144.7,983.9 155.1,885.6 207.6,748.5 129.4,701.0 120.8,650.1 160.6,522.1 326.8,574.9 308.4,559.5 309.8,513.5 191.6,421.8 -0.0,206.9 -0.0,114.2 632.4,78.8 1420.2,73.6 1409.8,782.2 1596.0,836.2 1596.0,1920.0 -0.0,1920.0 -0.0,1221.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0225/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14054781750755,42.37661314666009]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1329427868019,42.37776463567375]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13108083427478,42.37095805729125]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13868586498043,42.36980656827759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0226/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p226","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"9"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0226/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0226","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1195.9,1920.0 893.2,1920.0 843.9,1754.5 464.3,1757.3 85.2,412.9 539.8,293.9 942.5,256.6 1483.4,32.2 1468.8,1749.1 1172.6,1751.2 1174.4,1869.8 1596.0,1863.5 1596.0,1920.0 1195.9,1920.0 1195.9,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0226/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1020.0,957.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.131518,42.3762283]}},{"type":"Feature","properties":{"resourceCoords":[656.0,1184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1324692,42.3758735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0227/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p227","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0227/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0227","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"338.4,75.1 593.0,109.8 840.2,201.8 1417.4,581.9 1180.1,1375.8 1176.1,1809.4 1596.0,1813.1 1596.0,1920.0 -0.0,1920.0 -0.0,1800.7 298.1,1802.9 338.4,75.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0227/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.130984,42.3780249]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1270567,42.3778064]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1274126,42.374316199999996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1313399,42.3745347]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0228/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p228","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0228/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0228","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"587.9,1152.6 201.3,1220.0 131.8,820.7 215.9,50.7 96.3,0.0 1015.7,0.0 866.9,121.4 1471.5,172.6 1457.2,768.8 1309.7,1075.7 1174.5,1735.5 965.4,1642.8 903.8,1920.0 -0.0,1920.0 -0.0,1362.1 606.0,1250.9 587.9,1152.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0228/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[980.0,577.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1260056,42.375402]}},{"type":"Feature","properties":{"resourceCoords":[571.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.126735,42.376491]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0229/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p229","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"20"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0229/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0229","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1596.0,681.4 1596.0,740.7 1394.9,1185.0 1421.2,1325.2 1396.6,1391.2 1190.3,1433.8 1236.1,1703.5 1175.4,1855.3 1283.0,1876.7 1596.0,1813.2 1596.0,1920.0 -0.0,1920.0 -0.0,-0.0 1401.5,0.0 1557.0,671.4 1596.0,681.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0229/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[488.0,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1537647,42.3788927]}},{"type":"Feature","properties":{"resourceCoords":[271.0,1398.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1546539,42.3762021]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0230/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p230","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0230/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0230","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.7,1031.1 102.7,1084.0 56.3,1034.5 0.0,1039.2 0.0,-0.0 52.6,0.0 23.4,616.1 115.0,620.5 80.3,310.1 106.2,205.2 251.8,271.8 517.4,239.1 546.5,442.3 612.7,471.3 751.0,451.9 1177.5,670.1 1230.3,672.6 1164.7,862.8 1184.7,1078.2 1230.8,1171.0 1375.2,1340.2 1452.2,1504.8 1245.8,1514.5 1166.9,1371.9 1086.5,1349.4 986.1,1378.7 783.5,1505.6 515.8,1513.7 360.9,1563.1 336.4,1597.8 349.0,1655.8 322.6,1714.4 293.7,1739.8 252.5,1744.5 208.5,1414.5 175.3,1399.8 172.6,1145.2 338.2,1106.9 335.1,1068.0 169.4,1106.9 160.3,1026.0 98.7,1031.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0230/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15118509069778,42.37427245208529]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15187018939343,42.38001554748275]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14258308250086,42.3806286814976]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14189798380521,42.37488558610014]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0231/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p231","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0231/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0231","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.1,691.9 219.6,635.3 410.1,357.4 546.8,333.9 1362.9,333.8 1365.8,1562.8 1175.3,1920.0 343.8,1920.0 289.6,1920.0 198.1,691.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0231/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14692257538944,42.38086790283761]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13932614892785,42.38233248700778]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13695775631614,42.37553408785705]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14455418277772,42.374069503686876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__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 | 1935 | sanborn03701_004 p232 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6384.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1228.8,0.0 43.2,0.0 39.5,1613.8 575.2,1616.2 595.5,1395.0 1228.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__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":[-71.14016501464845,42.38102704674317]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13638122550478,42.38177020405943]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13517944338689,42.378383957082534]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13896323253056,42.377640799766276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__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 | 1935 | sanborn03701_004 p232 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3636.8"},{"label":"split_canvas_y","value":"3550.0"},{"label":"split_canvas_w","value":"2747.2"},{"label":"split_canvas_h","value":"4130.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"978.1,1787.8 1475.5,1788.3 1504.5,887.7 976.1,887.5 978.1,1787.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0232__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[909.2,887.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13922239288122,42.37816808161033]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,887.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13756930160402,42.37848707245411]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13692454107938,42.37663795805466]}},{"type":"Feature","properties":{"resourceCoords":[909.2,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13857763235659,42.376318967210885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0233/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p233","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0233/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0233","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1462.8,1318.5 1479.0,1439.8 1356.1,1878.2 44.4,1509.2 62.1,200.0 654.3,284.9 1372.2,231.6 1436.7,919.3 1347.6,1246.6 1462.8,1318.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0233/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13363251275645,42.38167960783178]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1332163474293,42.378771062412554]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13791992439631,42.37839862768271]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13833608972347,42.38130717310193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0234/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p234","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0234/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0234","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1314.1,172.7 1316.2,1787.5 191.9,1795.6 365.4,1301.8 318.0,1212.5 244.8,1169.7 364.8,854.5 367.6,167.5 1314.1,172.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0234/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13361992944795,42.37986002327026]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13281986476254,42.37697956489563]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13747787166868,42.37626354801682]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13827793635409,42.379144006391456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0235/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p235","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0235/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0235","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.0,1626.6 254.7,929.2 848.4,97.8 1543.8,756.2 969.2,1151.3 1029.6,1272.5 1056.8,1920.0 91.2,1920.0 98.0,1626.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0235/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13515551592006,42.38322752375918]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13126108984893,42.38380146114519]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13033291703987,42.38031635651431]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.134227343111,42.3797424191283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0236/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p236","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0236/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0236","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1097.9,453.4 1384.8,1591.0 1596.0,1451.0 1596.0,1641.2 1439.5,1673.4 1477.8,1864.8 1411.2,1833.8 811.9,1881.0 406.9,1789.4 63.9,1765.7 105.3,425.8 1097.9,453.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0236/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[91.0,790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.133842,42.379134]}},{"type":"Feature","properties":{"resourceCoords":[1173.0,790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.13129,42.379565]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0237__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 | 1935 | sanborn03701_004 p237 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6384.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0237__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0237","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"373.9,829.3 -0.0,1920.0 501.6,1920.0 703.8,1430.1 912.8,1298.0 912.7,1259.7 973.1,1259.8 1183.2,1127.0 1253.4,1119.5 1596.0,1246.4 1518.0,91.5 787.7,84.9 765.7,225.1 373.9,829.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0237__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1199.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.131547,42.382003]}},{"type":"Feature","properties":{"resourceCoords":[1518.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.131023,42.38241]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0238/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p238","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0238/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0238","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1596.0,1651.5 -0.0,1645.7 -0.0,1273.2 56.9,1250.8 62.8,737.2 413.2,270.8 821.6,244.9 680.6,0.0 715.2,0.0 1596.0,1651.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0238/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1309442662512,42.38091605428861]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12740234638564,42.38213426667992]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12543230855887,42.37896452506119]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12897422842444,42.377746312669885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0239/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p239","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0239/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0239","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"496.5,1599.2 189.6,1920.0 -0.0,1920.0 -0.0,1564.3 121.8,1563.3 114.4,485.6 882.0,72.0 984.2,294.0 1139.8,404.3 1521.9,-0.0 1596.0,-0.0 1596.0,578.4 980.1,1340.1 496.5,1599.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0239/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12585209738319,42.37959145578975]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12422231590364,42.37691199126052]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12855525972773,42.375453408704274]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13018504120728,42.378132873233504]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0240/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p240","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0240/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0240","type":"ImageService3","width":1584,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"767.8,1617.9 885.9,852.0 813.1,840.4 376.9,1176.0 296.9,1124.9 240.6,1043.7 173.8,810.5 266.0,779.9 275.8,292.7 -0.0,393.1 -0.0,229.4 784.5,277.0 1483.3,277.2 1261.8,1095.5 1277.2,1231.5 767.8,1617.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0240/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1331.0,826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1235554,42.3762497]}},{"type":"Feature","properties":{"resourceCoords":[784.0,277.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1231571,42.3776526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0241/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p241","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0241/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0241","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1333.3,1879.5 1457.9,1917.6 1596.0,1713.2 1596.0,1920.0 523.6,1920.0 396.8,1242.8 373.6,1025.5 323.7,646.5 247.6,119.4 1218.1,2.5 1148.8,430.1 1032.7,427.8 1111.9,1335.9 1513.0,1366.5 1333.3,1879.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0241/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12574261229392,42.38017185114553]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12207358265418,42.381250710381266]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12032892559681,42.37796716807898]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12399795523655,42.37688830884325]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0242/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p242","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0242/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0242","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"444.5,1746.9 305.4,1920.0 171.4,1890.3 392.6,1397.0 -0.0,1334.3 -0.0,428.9 114.2,440.6 219.2,22.8 664.8,15.6 1449.2,169.5 1556.3,157.7 1596.0,92.1 1596.0,193.9 1457.4,421.4 1415.8,397.2 886.5,1282.6 840.0,1272.4 585.1,1690.9 667.7,1736.8 561.1,1920.0 429.5,1920.0 444.5,1746.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0242/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[426.0,859.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.121546,42.3797769]}},{"type":"Feature","properties":{"resourceCoords":[1093.0,86.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1209122,42.3816047]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0243/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p243","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0243/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0243","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1163.2,68.4 1245.9,642.7 1176.8,1141.3 1596.0,1269.0 1596.0,1677.0 1101.4,1507.0 997.8,1855.7 197.7,1603.0 159.6,904.8 128.4,890.5 113.3,57.6 1163.2,68.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0243/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13131325654548,42.38232042886942]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12874876213166,42.38455088461281]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12514163412354,42.382255949046765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12770612853735,42.38002549330338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0244/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p244","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0244/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0244","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"785.3,1075.7 356.8,0.0 1209.5,0.0 1215.6,877.4 1183.7,1640.4 1018.0,1643.7 1127.0,1920.0 633.6,1920.0 290.5,1009.4 785.3,1075.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0244/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12875809834786,42.38032178769088]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12541375241155,42.381872237292356]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1229064479095,42.378879294258525]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12625079384581,42.37732884465705]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0245/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p245","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0245/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0245","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1533.8,893.0 1596.0,940.8 1596.0,1051.0 1351.1,1831.7 -0.0,1814.2 -0.0,368.2 135.4,403.0 258.8,-0.0 495.7,-0.0 479.5,21.2 1596.0,872.8 1596.0,899.9 1533.8,893.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0245/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1216475,42.3827123]}},{"type":"Feature","properties":{"resourceCoords":[792.0,1820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.122664,42.3822301]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0246/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p246","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0246/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0246","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.4,1677.8 77.7,1156.6 -0.0,1179.9 -0.0,973.8 75.5,984.9 77.8,250.2 1409.4,264.1 1300.8,1683.4 60.4,1677.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0246/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[859.0,254.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.122664,42.3822301]}},{"type":"Feature","properties":{"resourceCoords":[76.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.12463,42.383007]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0247/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p247","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"6"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0247/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0247","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1306.0,1564.0 1103.4,1596.3 962.3,1303.8 873.2,1313.6 532.8,1373.3 379.2,896.7 57.3,418.9 457.8,253.6 1474.0,132.2 1471.4,982.7 1312.8,987.2 1306.0,1564.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0247/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1474.0,1612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.124887,42.382889]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1263599,42.3853901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0248/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p248","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"18"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0248/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0248","type":"ImageService3","width":1600,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1852.8 14.2,1193.2 174.7,1190.7 187.9,75.2 782.1,74.6 782.1,97.8 777.0,324.0 775.4,423.2 1374.9,432.4 1367.0,1654.4 -0.0,1852.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0248/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[177.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1255472,42.384007]}},{"type":"Feature","properties":{"resourceCoords":[777.0,324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1250418,42.3858426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0249/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p249","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0249/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0249","type":"ImageService3","width":1596,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.5,93.1 1296.5,544.0 1596.0,624.0 1596.0,1053.7 847.9,847.0 849.5,1221.2 1047.3,1289.5 1001.5,1758.2 231.8,1877.5 235.2,30.4 1325.5,93.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0249/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[681.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1220025,42.3855196]}},{"type":"Feature","properties":{"resourceCoords":[225.0,1221.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.123047,42.385178]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0250/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p250","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0250/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0250","type":"ImageService3","width":1597,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,759.6 480.9,13.8 1525.1,0.0 1576.1,40.2 1597.0,559.1 606.3,1887.1 135.9,1803.1 -0.0,1132.0 -0.0,759.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0250/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12278119215516,42.38756606402525]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11913860316295,42.38878826768492]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11716314388181,42.385530813670435]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12080573287402,42.38430861001076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0251/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p251","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0251/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0251","type":"ImageService3","width":1607,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"303.2,0.0 1607.0,0.0 1607.0,1920.0 1331.6,1920.0 1334.8,1895.7 1265.0,1862.7 358.5,1850.9 371.0,998.3 312.1,731.4 173.1,461.7 164.0,355.9 183.9,216.0 303.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0251/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14825048392449,42.37788793779886]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15034681776334,42.38350318795603]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1413280007482,42.38536635022968]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13923166690935,42.37975110007251]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__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 | 1935 | sanborn03701_004 p252 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6420.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.8,1746.5 1208.0,1734.5 1565.7,922.7 949.5,563.1 1005.2,507.2 1001.0,0.0 689.9,0.0 647.9,387.6 180.1,0.0 42.4,0.0 46.8,1746.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[561.0,844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.139373,42.3829]}},{"type":"Feature","properties":{"resourceCoords":[561.0,1809.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.138776,42.38117]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__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 | 1935 | sanborn03701_004 p252 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4004.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2416.0"},{"label":"split_canvas_h","value":"2060.4"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1605.0,435.2 1605.0,0.0 1001.0,0.0 1001.9,107.8 1092.0,98.0 1605.0,435.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0252__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1001.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14108723783929,42.384391667477324]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13959717074731,42.38454841390135]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,515.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13941631469815,42.383612633091936]}},{"type":"Feature","properties":{"resourceCoords":[1001.0,515.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14090638179013,42.38345588666791]}},{"type":"Feature","properties":{"resourceCoords":[1523.1,371.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1396687,42.3838523]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0253/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p253","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"22"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0253/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0253","type":"ImageService3","width":1611,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.0,1920.0 1245.9,1920.0 1213.0,1679.9 1023.8,1527.3 948.1,1494.0 675.0,1491.8 668.5,1823.0 222.6,1815.1 141.9,1485.3 546.6,1491.8 256.1,1191.3 272.9,1178.2 100.4,956.0 294.0,761.5 0.0,470.9 0.0,-0.0 1611.0,0.0 1611.0,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0253/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1066.0,1123.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1378966,42.3871544]}},{"type":"Feature","properties":{"resourceCoords":[971.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.13653,42.3861789]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0254/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p254","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0254/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0254","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.8,139.3 762.5,137.2 1254.1,492.3 1332.5,970.6 1605.0,964.8 1605.0,1875.6 183.7,1644.9 172.8,139.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0254/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13778808402157,42.385113827933075]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13574855641384,42.387628726257816]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1317040271998,42.38581390262008]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13374355480752,42.38329900429534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0255/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p255","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0255/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0255","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.6,1659.4 51.4,1851.8 51.2,518.0 212.2,44.8 1557.7,592.2 1529.6,1659.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0255/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1313145952511,42.386485679665704]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12830898873815,42.38463456818316]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1312859391233,42.38196005042882]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13429154563624,42.38381116191137]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0256/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p256","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0256/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0256","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"434.5,1913.3 45.4,918.7 -0.0,931.0 -0.0,35.9 1359.5,44.1 1501.0,1132.7 434.5,1913.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0256/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13582952195961,42.38469142363437]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1324686954978,42.38319487780485]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1348753668552,42.38020418570409]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.138236193317,42.38170073153361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0257/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p257","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0257/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0257","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"300.2,727.2 -0.0,315.2 -0.0,208.0 167.0,-0.0 151.8,38.9 370.6,194.7 952.8,243.3 951.7,338.5 1603.0,335.6 1603.0,934.1 1255.0,932.8 1264.8,1525.8 317.0,1529.5 300.2,727.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0257/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[937.0,847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1254,42.3868564]}},{"type":"Feature","properties":{"resourceCoords":[1504.0,934.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1250418,42.3858426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0258/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p258","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"23"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0258/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0258","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.9,243.6 1346.5,1271.6 1494.6,1682.2 61.8,1731.1 70.7,193.5 1270.9,243.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0258/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[403.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1295021,42.3860208]}},{"type":"Feature","properties":{"resourceCoords":[705.0,1721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.130263,42.38513]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0259/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p259","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0259/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0259","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"653.0,1573.2 156.1,905.8 1109.5,225.4 1098.3,0.0 1603.0,0.0 1603.0,205.3 1201.2,1049.3 1201.4,1157.7 1603.0,1352.3 1603.0,1852.5 653.0,1573.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0259/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1298189107505,42.38747549025264]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1289793862272,42.39034505096426]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12435849652344,42.389597124992015]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12519802104674,42.3867275642804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0260__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 | 1935 | sanborn03701_004 p260 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6412.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0260__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0260","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"834.4,1539.2 921.9,1500.8 968.6,1426.6 941.1,315.7 683.6,327.7 215.3,636.0 834.4,1539.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0260__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[643.0,718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1235273,42.3880146]}},{"type":"Feature","properties":{"resourceCoords":[965.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1205826,42.3880741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0261/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p261","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0261/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0261","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"212.8,1045.9 211.2,1044.9 367.0,613.6 585.0,685.7 811.8,0.0 1603.0,0.0 1603.0,323.8 1378.8,377.6 1357.5,626.9 1424.3,905.1 1350.7,914.2 1405.3,1361.6 1286.5,1360.0 1290.3,1473.5 801.8,1809.4 212.8,1045.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0261/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[250.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1343407,42.3863788]}},{"type":"Feature","properties":{"resourceCoords":[1368.0,806.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.131825,42.390127]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0263/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p263","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0263/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0263","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1603.0,1687.8 1603.0,1920.0 467.4,1920.0 -0.0,1764.8 -0.0,76.0 1199.3,219.5 1385.0,1629.1 1603.0,1687.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0263/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[807.0,1089.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1319239,42.3917658]}},{"type":"Feature","properties":{"resourceCoords":[459.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1328755,42.3935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0264/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p264","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0264/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0264","type":"ImageService3","width":1603,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"327.4,1442.7 -0.0,153.3 -0.0,50.5 152.4,53.7 1417.9,366.3 1472.2,1590.5 896.1,1520.2 1139.0,1679.8 935.1,1651.6 898.1,1920.0 -0.0,1920.0 -0.0,1773.2 575.7,1707.6 549.1,1475.7 327.4,1442.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0264/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13095676566918,42.39348564382846]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12703054524168,42.39325968915929]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12739442085761,42.389762022175375]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13132064128511,42.38998797684455]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0265/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p265","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0265/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0265","type":"ImageService3","width":1599,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"83.4,680.2 352.6,534.8 883.2,33.9 725.8,0.0 1553.2,0.0 1536.0,106.2 1423.6,84.8 1382.9,326.7 1504.5,347.1 1479.3,1239.9 1599.0,1218.2 1599.0,1873.5 1502.3,1920.0 287.4,1920.0 800.2,1664.8 83.4,680.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0265/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[453.0,446.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1264701,42.3925411]}},{"type":"Feature","properties":{"resourceCoords":[800.0,1665.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1276524,42.3903806]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0266/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p266","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0266/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0266","type":"ImageService3","width":1600,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.6,569.4 350.9,245.6 1067.3,195.6 1244.5,1508.7 1582.6,1463.0 1049.9,1701.8 1008.5,1854.4 902.6,1298.8 452.4,1529.9 447.4,1314.2 326.0,1340.0 307.6,569.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0266/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12420834539205,42.39247813871843]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12120037533997,42.390636881709895]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12417101475475,42.387952152586024]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12717898480683,42.38979340959456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0267/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p267","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0267/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0267","type":"ImageService3","width":1599,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,336.9 -0.0,-0.0 1360.0,0.0 1361.3,108.1 1355.8,106.7 1339.2,534.9 1350.9,536.5 1332.0,720.2 1107.6,1388.7 883.8,1701.9 179.0,1242.2 261.8,1125.3 0.0,336.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0267/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12420286708723,42.388936401331094]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1221271404604,42.39142953392758]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11810229621052,42.38957569505649]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12017802283735,42.38708256246001]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0268/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p268","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0268/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0268","type":"ImageService3","width":1599,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.1,1745.7 256.3,1251.2 223.4,1179.5 144.3,1154.8 269.5,788.8 292.7,80.5 1323.3,73.1 1321.3,249.8 1599.0,155.7 1599.0,1920.0 296.0,1920.0 124.1,1745.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0268/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12163248065801,42.39007348290875]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11869662118647,42.392009192226816]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11557166615903,42.38938716520746]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11850752563056,42.38745145588939]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0269/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p269","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0269/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0269","type":"ImageService3","width":1599,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 1599.0,0.0 1599.0,538.8 1513.5,526.9 1314.8,1889.9 64.7,1882.0 88.8,1920.0 -0.0,1920.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0269/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1339417383299,42.403988423100444]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1306030103242,42.40245207815645]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1330837168433,42.399470817714175]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.136422444849,42.40100716265817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0270/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p270","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0270/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0270","type":"ImageService3","width":1599,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1398.4,0.0 1397.3,30.9 1413.4,20.9 1419.0,42.2 1402.0,513.0 1380.7,510.1 1371.9,764.3 1599.0,772.2 1599.0,824.0 1335.2,791.4 1324.0,1300.6 1534.9,1305.1 1526.5,1874.8 1436.4,1863.4 1435.5,1920.0 -0.0,1920.0 -0.0,-0.0 1398.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0270/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14307790007516,42.40020483804525]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13524717647623,42.400471078522564]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13481731618965,42.393478228978594]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14264803978858,42.39321198850128]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0271/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p271","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0271/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0271","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1323.4,867.4 1605.0,1124.5 1605.0,1920.0 -0.0,1920.0 -0.0,1409.0 43.1,1413.3 44.4,466.7 31.6,424.2 -0.0,445.6 -0.0,71.2 1298.7,906.4 1323.4,867.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0271/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1362400703751,42.401133254661524]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13232413685816,42.40116540152235]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13227242587469,42.39768167972057]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13618835939162,42.397649532859745]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0272/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p272","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0272/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0272","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1784.2 -0.0,725.1 461.7,728.3 464.7,0.0 529.5,0.0 866.5,366.3 834.9,397.6 1252.4,901.7 1290.3,865.0 1605.0,1260.9 1605.0,1335.7 1042.5,1774.3 -0.0,1784.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0272/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[484.0,948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1322077,42.3972816]}},{"type":"Feature","properties":{"resourceCoords":[339.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1325291,42.3957642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0273/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p273","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0273/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0273","type":"ImageService3","width":1605,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"165.2,1607.6 171.8,597.4 692.3,653.8 690.8,551.0 1358.0,563.7 1345.2,1615.1 165.2,1607.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0273/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1414.0,1174.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1332283,42.3965542]}},{"type":"Feature","properties":{"resourceCoords":[998.0,1611.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1342305,42.3957283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0274/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p274","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0274/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0274","type":"ImageService3","width":1613,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"645.6,1920.0 -0.0,1920.0 -0.0,1476.5 177.7,1496.2 176.6,366.1 1429.0,367.0 1435.1,1634.5 643.1,1542.5 645.6,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0274/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[594.0,367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1342305,42.3957283]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.132153,42.395774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0275/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p275","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0275/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0275","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.9,339.8 -0.0,308.4 456.6,116.1 474.1,161.2 906.9,-0.0 1459.5,1354.1 1560.0,1385.4 1549.5,1447.5 1625.0,1482.2 1545.3,1472.2 1396.1,1858.0 166.8,1533.3 317.0,1001.3 49.9,339.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0275/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12865492321134,42.39687826226999]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12749822889279,42.39402754820507]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13202708581217,42.39301111372859]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13318378013072,42.39586182779352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0276/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p276","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0276/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0276","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"313.6,1734.3 233.4,1667.7 232.6,205.6 1172.5,195.4 1174.9,1182.0 313.6,1734.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0276/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1197.0,171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1263776,42.3939678]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,995.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1275534,42.3926185]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__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 | 1935 | sanborn03701_004 p277 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4070.8"},{"label":"split_canvas_w","value":"6500.0"},{"label":"split_canvas_h","value":"3609.2"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1861.3 -0.0,1909.7 1415.7,1869.7 1398.5,1066.7 1625.0,1063.5 1625.0,1017.7 330.8,1017.9 331.9,1217.5 217.0,1217.5 220.6,1852.8 -0.0,1861.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[217.0,1217.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.127021,42.396429]}},{"type":"Feature","properties":{"resourceCoords":[638.0,1217.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1263798,42.3958247]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__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 | 1935 | sanborn03701_004 p277 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6500.0"},{"label":"split_canvas_h","value":"4071.6"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1509.0,320.0 1625.0,320.6 1625.0,-0.0 48.5,24.4 250.2,989.8 760.8,980.0 810.3,1017.8 810.4,1017.8 785.5,977.7 1509.0,961.4 1509.0,320.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0277__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1509.0,320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.127021,42.396429]}},{"type":"Feature","properties":{"resourceCoords":[1509.0,961.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.128251,42.3957087]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0278/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p278","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0278/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0278","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"941.5,800.0 476.7,1483.8 -0.0,1813.8 -0.0,0.0 1557.1,-0.0 1595.0,612.0 778.5,802.9 941.5,800.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0278/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12492805676133,42.39490280627008]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12241668603473,42.39260494397438]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12606710866355,42.390398019832034]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1920.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12857847939016,42.39269588212773]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0279/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p279","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"15"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0279/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0279","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"279.3,1213.2 334.8,727.0 294.4,680.4 341.1,642.9 347.4,270.4 310.4,275.8 273.9,0.0 1625.0,0.0 1625.0,1920.0 1142.8,1920.0 1141.6,1848.1 129.6,1844.6 235.8,1209.9 279.3,1213.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0279/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[893.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1323895,42.4005176]}},{"type":"Feature","properties":{"resourceCoords":[551.0,1853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1296164,42.3979817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0280/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p280","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0280/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0280","type":"ImageService3","width":1638,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1492.9,1377.7 794.6,1542.6 808.7,1592.2 455.5,1691.5 117.5,1736.8 123.6,1920.0 -0.0,1920.0 -0.0,1674.0 114.8,1676.5 110.7,961.4 -0.0,954.4 -0.0,0.0 1554.1,-0.0 1638.0,228.9 1638.0,360.2 1499.3,355.6 1492.9,1377.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0280/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[710.0,825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1212667,42.3920603]}},{"type":"Feature","properties":{"resourceCoords":[1489.0,825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1199597,42.3910079]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0281/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1935 | sanborn03701_004 p281","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"}],"created":"2026-09-21T19:54:40Z","modified":"2026-09-21T19:54:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0281/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0281","type":"ImageService3","width":1637,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,291.0 55.7,246.3 -0.0,246.1 -0.0,178.1 85.5,177.9 59.1,0.0 100.1,0.0 125.9,177.8 392.6,196.4 410.9,162.7 1226.0,101.5 1313.0,250.6 1432.0,389.1 1515.2,460.5 1561.2,456.6 1637.0,508.6 1637.0,569.6 1480.5,522.9 1440.6,674.4 1462.2,722.6 1537.0,760.8 1486.2,907.8 1478.3,1012.1 1603.8,1059.2 1635.4,1093.7 1573.0,1245.3 1333.7,1268.8 1353.2,1920.0 -0.0,1920.0 -0.0,291.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764cm:g03701193502:03701_02_1935-0281/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1193.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1400181,42.3722676]}},{"type":"Feature","properties":{"resourceCoords":[1245.0,1023.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1399614,42.3730589]}}]}}]}