{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03701_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Cambridge, Massachusetts | 1950 | 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":"95"},{"label":"placed","value":"83"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef 44, georef-snap 40, snap:0 2, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.41310,-71.11851 +/-267m); p202__2 (tier 1, 42.37112,-71.11774 +/-100m); p210 (tier 1, 42.37746,-71.12490 +/-125m); p223__2 (tier 1, 42.38719,-71.11701 +/-100m); p237__1 (tier 2, 42.37991,-71.12992 +/-194m); p260__1 (tier 1, 42.38797,-71.12160 +/-100m); p279__2 (tier 2, 42.39875,-71.13108 +/-162m); p281 (tier 2, 42.38270,-71.13796 +/-1634m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0201/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p201","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0201/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0201/info.json","type":"ImageService2","height":7680,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2713.4,6035.6 2433.2,7680.0 2330.5,7680.0 2498.9,6599.8 1104.7,5705.6 625.2,5197.4 811.2,3921.9 1079.7,3292.4 1610.5,2650.1 3384.1,1359.9 3432.6,1225.7 3533.7,0.0 3720.7,0.0 3992.3,599.6 4432.3,984.3 4916.1,1161.4 5839.7,1135.6 5792.4,6310.6 2713.4,6035.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0201/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12095001810385,42.374640022264266]}},{"type":"Feature","properties":{"resourceCoords":[6612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11720516782603,42.37346204678869]}},{"type":"Feature","properties":{"resourceCoords":[6612.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11904422911095,42.370225877320536]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12278907938878,42.371403852796114]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0202__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 | 1950 | sanborn03701_007 p202 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6548.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0202__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0202/info.json","type":"ImageService2","height":7680,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5309.0,4143.0 6548.0,3646.0 6548.0,2119.1 6297.4,1090.1 862.7,1392.4 996.8,6530.5 1124.3,7140.2 3708.8,6940.6 3720.8,7680.0 4112.0,7680.0 4119.6,7680.0 4772.0,7680.0 5378.2,7680.0 5309.0,4143.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0202__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5636.0,1132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.115147,42.3723093]}},{"type":"Feature","properties":{"resourceCoords":[972.0,5356.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1188878,42.3714443]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0203/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p203","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0203/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0203/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2194.5,7232.4 1231.5,2823.1 3465.6,431.8 3964.9,545.3 4256.9,0.0 5237.5,0.0 5484.4,580.6 5784.1,587.5 5089.7,3666.4 4138.7,5677.8 3708.0,7145.3 2194.5,7232.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0203/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12395230682989,42.37753390514537]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12036290958113,42.37603543656303]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12270952799986,42.37292433108991]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12629892524862,42.37442279967225]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p204","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0204/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0204/info.json","type":"ImageService2","height":7680,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4828.9,5956.2 4290.1,6316.0 251.4,7650.9 290.7,6096.9 699.0,3872.9 576.2,667.3 2365.7,233.8 2731.7,-0.0 4206.9,-0.0 4759.7,286.9 4472.8,-0.0 4605.8,-0.0 5331.9,718.4 5391.5,638.3 5548.1,767.3 5935.2,1382.5 5646.9,685.3 6129.8,1382.3 5955.4,1450.2 6327.0,2699.1 4911.4,5170.9 4828.9,5956.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0204/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12095020927374,42.37638334939871]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11806650639006,42.37429678846027]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12135597690454,42.37178049849725]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12423967978822,42.37386705943569]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p205","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0205/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0205/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6592.0,1300.1 6592.0,7680.0 -0.0,7680.0 -0.0,3900.1 961.3,4117.9 1002.1,1269.1 6592.0,1300.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0205/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12571788883318,42.37502641422976]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12203057665891,42.373709718485124]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12409245555303,42.37051361944375]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12777976772729,42.37183031518838]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p206","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0206/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0206/info.json","type":"ImageService2","height":7680,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5734.3,3729.3 5836.0,3722.8 5419.8,7680.0 -0.0,7680.0 -0.0,6585.7 2409.3,6545.8 2303.6,157.9 4012.8,0.0 3905.4,1437.8 4442.0,1881.9 5832.5,2648.8 5734.3,3729.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0206/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1236121768198,42.37370902477837]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11998415484506,42.37235808495087]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12211383866463,42.36919219450957]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12574186063938,42.370543134337076]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0207/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p207","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0207/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0207/info.json","type":"ImageService2","height":7680,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6568.0,7680.0 -0.0,7680.0 -0.0,896.0 3252.0,657.0 3542.1,1269.1 6177.9,707.3 6295.1,1487.5 6568.0,1451.0 6568.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0207/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3584.0,1312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1192215,42.3706343]}},{"type":"Feature","properties":{"resourceCoords":[6176.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1177537,42.3702545]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0208/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p208","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0208/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0208/info.json","type":"ImageService2","height":7680,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,3047.4 428.5,3230.3 1733.6,0.0 6548.0,0.0 6147.5,984.4 6548.0,1168.2 6548.0,2176.2 6268.9,2018.8 6113.2,4078.9 6100.2,7389.1 6548.0,7680.0 -0.0,7680.0 -0.0,3047.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0208/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5316.0,7164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1140115,42.3677372]}},{"type":"Feature","properties":{"resourceCoords":[4184.0,6016.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1147012,42.3682838]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p209","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0209/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0209/info.json","type":"ImageService2","height":7680,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3195.5,7680.0 -0.0,7680.0 -0.0,471.2 344.4,467.6 352.0,847.6 1660.4,1479.8 5710.3,2725.5 4609.6,6789.7 3482.3,6601.7 3195.5,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0209/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2352.0,1700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1127858,42.3739747]}},{"type":"Feature","properties":{"resourceCoords":[4608.0,6788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1120092,42.371455]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0211/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p211","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0211/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0211/info.json","type":"ImageService2","height":7680,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5213.9,6581.3 5197.7,7680.0 -0.0,7680.0 -0.0,5126.4 1153.2,5011.1 1172.6,762.0 5251.1,894.1 5249.1,1059.2 5238.0,2263.5 6568.0,2298.0 6568.0,6527.9 5213.9,6581.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0211/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11128289632265,42.37375984630642]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10763475116927,42.372426958172426]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1097295709717,42.36925318932685]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11337771612507,42.37058607746084]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0212/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p212","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0212/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0212/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2647.4,7680.0 1202.4,4510.2 539.0,2696.4 760.1,2723.4 891.2,2722.7 436.0,1800.8 5166.0,1853.6 5174.8,695.8 6560.0,639.0 6560.0,7680.0 2647.4,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0212/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3156.0,2692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1118601,42.3695726]}},{"type":"Feature","properties":{"resourceCoords":[5984.0,4364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.110746,42.368306]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0213/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p213","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0213/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0213/info.json","type":"ImageService2","height":7680,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"484.0,2340.0 5758.7,2336.9 4580.1,5993.2 1310.0,4914.8 -0.0,4249.0 -0.0,3864.7 496.1,3869.5 484.0,2340.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0213/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2404.0,2340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1122389,42.3752127]}},{"type":"Feature","properties":{"resourceCoords":[484.0,2340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1134133,42.375365]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p214","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0214/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0214/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6560.0,7680.0 4925.9,7680.0 4895.2,6313.1 -0.0,6281.5 -0.0,2453.9 6560.0,338.9 6560.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0214/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2860.0,6300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1097285,42.3727673]}},{"type":"Feature","properties":{"resourceCoords":[2860.0,1528.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1083403,42.3747106]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0215/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p215","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0215/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0215/info.json","type":"ImageService2","height":7680,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1434.8,2460.5 1322.6,2138.4 4996.5,327.9 5108.3,542.1 5092.0,7178.0 1419.0,7201.1 1434.8,2460.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0215/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5092.0,3876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1084624,42.3762792]}},{"type":"Feature","properties":{"resourceCoords":[5092.0,7176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1088288,42.3747742]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0216/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p216","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"15"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0216/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0216/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6560.0,7680.0 5622.4,7680.0 5766.5,7453.2 1007.7,7514.7 960.4,837.1 845.9,622.6 2056.4,0.0 6560.0,0.0 6560.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0216/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[976.0,4192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1084624,42.3762792]}},{"type":"Feature","properties":{"resourceCoords":[976.0,5880.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1086584,42.375516]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0217/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p217","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0217/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0217/info.json","type":"ImageService2","height":7680,"width":6564},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1672.2,4501.0 1152.7,4143.6 941.3,4118.9 -0.0,3667.9 -0.0,1707.3 216.1,1679.9 658.0,1369.8 645.0,0.0 3335.0,0.0 3338.3,473.6 4289.2,3012.1 5235.4,2656.8 5054.0,4509.0 5723.2,4572.8 5423.2,7337.4 2334.9,6410.6 2149.5,6231.5 2038.6,6000.9 2047.1,5307.0 1976.8,5535.5 1855.7,4651.7 1833.8,4880.8 1672.2,4501.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0217/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12073537264821,42.37945632802799]}},{"type":"Feature","properties":{"resourceCoords":[6564.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11253736479931,42.37892423529719]}},{"type":"Feature","properties":{"resourceCoords":[6564.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11337418636276,42.37178834625873]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12157219421167,42.37232043898953]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0218/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p218","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0218/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0218/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5841.9,192.4 5656.8,7272.0 2897.4,7185.6 751.8,6325.5 1284.3,4880.6 1855.8,4701.6 959.2,2330.8 208.8,2036.1 -0.0,2133.8 -0.0,0.0 5941.9,-0.0 5841.9,192.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0218/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10923705682124,42.38324007439306]}},{"type":"Feature","properties":{"resourceCoords":[6560.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10682983209163,42.37750551004668]}},{"type":"Feature","properties":{"resourceCoords":[6560.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11585461531538,42.37540900916714]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.118261840045,42.38114357351352]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0219/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p219","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0219/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0219/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6592.0,1102.4 6077.0,3803.7 5208.5,7575.2 1454.0,7543.3 -0.0,1846.3 -0.0,0.0 6592.0,-0.0 6592.0,1102.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0219/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11150591658988,42.38299053747281]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11179650609114,42.379974737404986]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11651976112424,42.38022657995775]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11622917162298,42.38324238002557]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p220","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0220/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0220/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5824.3,1016.9 5939.2,1312.3 5949.1,6117.2 2171.1,6153.5 2197.9,7680.0 -0.0,7680.0 -0.0,3904.4 5824.3,1016.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0220/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2736.0,2548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1126581,42.3769466]}},{"type":"Feature","properties":{"resourceCoords":[5928.0,4676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1109475,42.3757178]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0221/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p221","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0221/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0221/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"508.4,7680.0 508.9,6683.1 508.9,6633.6 512.0,0.0 5817.6,0.0 6039.1,2255.9 6022.3,7680.0 508.4,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0221/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6020.0,3560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1161594,42.3830433]}},{"type":"Feature","properties":{"resourceCoords":[6020.0,6828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1163192,42.3815738]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0222/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p222","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0222/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0222/info.json","type":"ImageService2","height":7680,"width":6560},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"590.8,4490.0 644.4,2660.0 817.0,2608.7 854.3,1447.5 6235.5,1578.7 6141.1,5928.9 752.2,5757.3 782.2,4492.9 590.8,4490.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0222/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6172.0,4556.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.116503,42.3798186]}},{"type":"Feature","properties":{"resourceCoords":[644.0,2660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1198891,42.3808358]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0223__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 | 1950 | sanborn03701_007 p223 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0223__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0223/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"459.6,5427.4 462.2,6595.7 5644.6,6623.0 5519.7,5476.4 6394.7,5470.9 6600.0,5219.3 6600.0,1726.4 4474.0,1723.2 3576.0,1160.8 3577.2,0.0 -0.0,-0.0 276.2,2171.4 281.7,5425.3 459.6,5427.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0223__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3236.0,5448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.117555,42.3852766]}},{"type":"Feature","properties":{"resourceCoords":[484.0,4432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1192232,42.3858386]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0224/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p224","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0224/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0224/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"766.4,6738.1 985.6,3945.2 897.3,1033.6 1784.2,1095.1 2011.6,857.8 2038.2,0.0 6572.0,0.0 6572.0,5694.1 5634.7,6424.1 4704.7,6766.0 766.4,6738.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0224/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11668556825732,42.38565627591592]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11264183798153,42.385659750717586]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1126363790897,42.38214467210846]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11668010936549,42.382141197306794]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0225/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p225","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0225/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0225/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7680.0 -0.0,1784.1 207.0,1872.3 1017.7,1824.9 195.2,977.9 -0.0,700.3 -0.0,466.3 2606.7,315.0 5746.5,288.4 5710.6,3112.4 6600.0,3368.7 6600.0,7680.0 -0.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0225/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14065216594474,42.37660312764779]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13275766769166,42.377786584465504]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13090665650621,42.37095215171174]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13880115475929,42.36976869489403]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0226/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p226","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0226/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0226/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3877.4,7035.1 2052.5,7073.6 465.8,1734.9 2284.4,1236.1 3899.2,1065.8 6059.4,142.1 6083.9,6986.8 4863.5,7012.1 4868.6,7430.8 6572.0,7410.2 6572.0,7680.0 4078.0,7680.0 3877.4,7035.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0226/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13388556813075,42.378193291065394]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12984056808976,42.377882858418054]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13032819649028,42.374366248007114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13437319653127,42.37467668065445]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0227/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p227","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0227/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0227/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1281.4,392.3 2300.3,513.6 3293.3,862.8 5622.1,2333.8 4721.3,5498.7 4731.1,7219.4 6600.0,7204.3 6600.0,7680.0 -0.0,7680.0 -0.0,7260.4 1223.0,7249.9 1281.4,392.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0227/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13093122691127,42.37807480245402]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12687203647539,42.377800149886774]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12730163048457,42.37428616861873]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13136082092045,42.37456082118598]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0228/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p228","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0228/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0228/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2854.1,5301.6 2756.0,4834.3 935.7,5229.1 571.5,3540.7 798.2,248.3 6164.3,552.7 6572.0,0.0 6572.0,4577.8 5629.6,4425.5 5166.6,7257.3 4246.4,6892.9 4129.2,7680.0 -0.0,7680.0 -0.0,5896.4 2854.1,5301.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0228/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[592.0,2992.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1282235,42.3755998]}},{"type":"Feature","properties":{"resourceCoords":[6196.0,2348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1247859,42.3751315]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0229/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p229","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0229/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0229/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7680.0 -0.0,-0.0 6600.0,0.0 6600.0,2838.7 6479.7,2879.0 5580.9,4747.2 5671.8,5294.5 5562.8,5560.3 4758.8,5696.0 4915.2,6722.8 4650.0,7360.2 4763.9,7522.1 4311.5,7680.0 -0.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0229/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15649981323175,42.38110274285597]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14844940170876,42.38148605504022]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14784983641334,42.37451708194438]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15590024793633,42.374133769760135]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0230/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p230","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0230/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0230/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"257.6,0.0 249.4,633.9 399.5,1082.7 560.8,972.3 1187.0,1242.4 2203.1,1101.1 2326.8,1896.9 2587.9,2007.9 3129.6,1925.1 5014.2,2861.2 4771.4,3653.7 4843.7,4308.5 5044.9,4725.2 5619.4,5382.6 5929.0,6024.9 5119.4,6072.4 4805.5,5528.4 4462.2,5439.5 4094.5,5551.4 3305.2,6058.6 2287.3,6099.0 1980.3,6203.6 1722.7,6452.7 1394.0,6999.6 1232.5,7020.1 1114.3,6395.7 1026.0,6293.7 896.7,6268.3 701.3,7680.0 0.0,7680.0 0.0,5698.9 108.4,5473.3 108.0,5407.6 0.0,5404.2 0.0,-0.0 257.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0230/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15139963676434,42.37411045610424]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15202438070368,42.38014269249921]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14254876385887,42.38068581806166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14192401991953,42.374653581666685]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0231/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p231","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0231/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0231/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1775.4,5982.0 1373.6,5687.9 1149.4,5311.0 1125.8,5066.2 1274.6,4091.7 910.3,3181.8 856.1,2858.6 887.6,2666.5 1015.7,2475.1 1609.8,2263.0 1708.7,1454.3 2254.7,1362.3 5511.5,1373.7 5505.1,6278.8 3601.4,6271.0 4165.8,7087.1 4716.1,7680.0 3911.9,7680.0 3712.3,7580.9 3706.5,7680.0 -0.0,7680.0 -0.0,7196.3 49.9,7095.1 318.3,7254.3 2275.9,7611.3 2400.2,6929.4 2024.6,6742.9 1042.5,6470.8 1090.9,6347.6 1207.6,6278.8 1848.5,6226.3 1775.4,5982.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0231/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14702146862979,42.38086922459696]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13915774832387,42.38240825436965]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13675041866156,42.375600967050225]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14461413896748,42.37406193727753]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__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 | 1950 | sanborn03701_007 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":"6572.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.1,6507.0 2523.8,6534.9 2607.4,5596.2 4860.5,647.8 2867.3,338.2 417.7,302.0 398.1,6507.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__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":[-71.14032115009637,42.38102171575145]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13639903631201,42.38179495616136]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13518437844269,42.37838531956642]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13910649222704,42.37761207915651]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__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 | 1950 | sanborn03701_007 p232 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3856.8"},{"label":"split_canvas_y","value":"3576.0"},{"label":"split_canvas_w","value":"2715.2"},{"label":"split_canvas_h","value":"4104.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4140.8,7140.9 6135.6,7127.3 6221.6,3576.1 4104.8,3576.4 4140.8,7140.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0232__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3856.8,3576.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13920356073044,42.378151849820114]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,3576.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13757070801275,42.37845676637442]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13695075691517,42.37661950086489]}},{"type":"Feature","properties":{"resourceCoords":[3856.8,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13858360963286,42.376314584310585]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0233/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p233","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0233/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0233/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6093.3,5771.2 5610.2,7532.9 339.0,6082.5 314.7,793.0 2587.9,1092.9 5637.0,926.1 5911.7,3683.9 5561.5,4999.1 6025.7,5284.8 6093.3,5771.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0233/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13362283054394,42.38173826471435]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1332170127444,42.378738700884476]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13790902750264,42.37838741200712]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13831484530219,42.381386975836996]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0234/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p234","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0234/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0234/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5455.4,7187.8 943.5,7205.4 1640.8,5238.7 1450.5,4881.8 1156.9,4710.4 1639.1,3455.0 1652.0,716.0 5450.0,749.1 5455.4,7187.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0234/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5404.0,2420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1344025,42.377288]}},{"type":"Feature","properties":{"resourceCoords":[1652.0,716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.133842,42.379134]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0235/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p235","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"15"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0235/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0235/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3485.1,401.0 6306.7,3014.7 5816.6,3367.4 6600.0,4324.2 6600.0,5931.0 5847.2,6128.3 632.9,6183.0 1147.7,3792.5 3485.1,401.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0235/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4308.0,5684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.131944,42.381041]}},{"type":"Feature","properties":{"resourceCoords":[3744.0,624.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.132855,42.383276]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0236/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p236","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0236/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0236/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"556.3,1482.3 658.3,0.0 4352.2,0.0 4352.4,0.0 5859.1,0.0 5597.3,65.3 6571.4,3882.9 5391.5,5042.9 5854.5,6524.0 5825.5,6873.6 3417.2,7128.5 1916.4,6829.2 579.7,6781.2 556.3,1482.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0236/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13453346481016,42.38045442616963]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13051930235999,42.38103068444966]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12961407470233,42.37754103631549]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13362823715251,42.37696477803546]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0237__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 | 1950 | sanborn03701_007 p237 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3769.6"},{"label":"split_canvas_y","value":"5089.2"},{"label":"split_canvas_w","value":"2830.4"},{"label":"split_canvas_h","value":"2590.8"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0237__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0237/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4199.9,7013.0 5278.5,7565.1 6600.0,5358.1 6600.0,5095.2 4585.4,5090.9 3770.1,6604.4 3770.2,7094.6 3836.3,7151.0 4199.9,7013.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0237__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3769.6,5089.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13093298780014,42.37832585406146]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,5089.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12993832756459,42.37939982471105]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1286169740765,42.37872260178837]}},{"type":"Feature","properties":{"resourceCoords":[3769.6,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12961163431204,42.377648631138776]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0238/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p238","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0238/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0238/info.json","type":"ImageService2","height":7680,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6173.5,5981.8 409.9,5990.1 434.8,3986.0 301.0,3755.8 -0.0,3933.4 0.0,-0.0 2896.9,0.0 6173.5,5981.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0238/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1192.0,2000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1299003,42.380311]}},{"type":"Feature","properties":{"resourceCoords":[436.0,3892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1298255,42.3793692]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0239/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p239","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0239/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0239/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4543.5,5176.0 2090.5,6434.8 936.0,7507.0 632.6,7294.8 560.0,6048.0 -0.0,6040.2 -0.0,201.1 633.2,-0.0 603.5,1944.6 3713.8,339.0 4115.0,1235.8 4736.7,1688.6 6356.1,27.1 6600.0,-0.0 6600.0,3188.5 4543.5,5176.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0239/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[560.0,6048.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.12914,42.3782512]}},{"type":"Feature","properties":{"resourceCoords":[3712.0,340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.125114,42.378056]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0240/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p240","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0240/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0240/info.json","type":"ImageService2","height":7680,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3748.5,3310.5 3506.4,3307.0 1706.6,4738.3 1385.1,4538.6 1241.4,4335.7 1252.7,977.6 4202.5,1097.6 4407.2,-0.0 6588.0,-0.0 6588.0,927.9 6093.7,1063.8 5252.5,4230.2 5306.8,4901.9 3335.2,6442.0 3748.5,3310.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0240/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1236813416811,42.3792203821506]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12147208682082,42.37664322952754]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12551049898816,42.374727251274585]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12771975384845,42.37730440389765]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0241/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p241","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0241/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0241/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5017.1,34.4 4735.1,1745.2 4091.8,1730.6 4644.7,7646.3 3336.9,7680.0 2183.1,7546.6 1131.3,492.0 5017.1,34.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0241/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12582656129065,42.3801526631331]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12203960323298,42.38127479222944]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12028436011386,42.377996628743915]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12407131817153,42.37687449964758]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0242/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p242","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0242/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0242/info.json","type":"ImageService2","height":7680,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"634.4,1737.7 1071.1,73.0 2860.7,70.0 6588.0,836.3 6500.9,977.3 6506.0,980.3 5460.6,2645.0 5284.9,2601.8 4317.3,4152.3 4482.0,4251.7 2377.6,7680.0 -0.0,7561.2 -0.0,1663.9 634.4,1737.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0242/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1235542103992,42.380795583199514]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11990340910232,42.38218278323558]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11772955551469,42.37901677342499]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12138035681157,42.37762957338893]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0243/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p243","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0243/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0243/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4449.1,6186.8 3974.0,7680.0 958.6,7680.0 684.4,3448.3 -0.0,3143.6 0.0,198.2 4775.1,296.9 5030.7,1531.6 5035.9,3390.4 4449.1,6186.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0243/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4852.0,4292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1273844,42.3827]}},{"type":"Feature","properties":{"resourceCoords":[680.0,2792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1297818,42.3816801]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0244/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p244","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0244/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0244/info.json","type":"ImageService2","height":7680,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4893.6,7680.0 1524.2,7680.0 2571.2,7316.1 1369.1,4056.3 3282.6,4331.6 3166.5,3714.1 2167.7,1257.2 5048.2,367.4 4893.6,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0244/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12889870362068,42.380276653694494]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12543878442743,42.381906001956686]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12288548051204,42.37890550890413]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12634539970529,42.37727616064194]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0245/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p245","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"19"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0245/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0245/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5568.5,7250.4 260.0,7260.0 257.2,3579.9 1210.2,44.7 1775.0,-0.0 6600.0,3565.4 5568.5,7250.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0245/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3288.0,3960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.120958,42.38306]}},{"type":"Feature","properties":{"resourceCoords":[260.0,7260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1237007,42.3834417]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0246/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p246","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0246/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0246/info.json","type":"ImageService2","height":7680,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"436.3,6727.4 561.5,1008.1 5880.2,1081.8 5391.0,6766.3 436.3,6727.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0246/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12336627089961,42.38391090688406]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12114926455628,42.38136654100788]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12513659717533,42.3794439837113]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12735360351866,42.38198834958748]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0247/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p247","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"8"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0247/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0247/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6033.9,566.8 6028.0,6487.9 2624.3,6970.7 1650.8,3620.9 365.0,1708.1 1968.0,1048.3 6033.9,566.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0247/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6028.0,3840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1255472,42.384007]}},{"type":"Feature","properties":{"resourceCoords":[6028.0,6488.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.124887,42.382889]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0248/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p248","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"18"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0248/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0248/info.json","type":"ImageService2","height":7680,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"963.1,7242.3 1062.0,351.3 3399.5,357.2 3367.1,1778.8 5725.5,1832.1 5678.1,6580.7 963.1,7242.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0248/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3360.0,3124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1245872,42.3850862]}},{"type":"Feature","properties":{"resourceCoords":[5720.0,2220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1234739,42.3859202]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0249/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p249","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0249/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0249/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1060.8,161.8 5941.1,313.3 5933.7,441.7 5422.0,412.3 5305.9,2216.1 6600.0,2561.8 6600.0,6467.4 4309.1,5198.2 4073.1,7616.4 2825.4,7421.2 1047.2,7550.0 1060.8,161.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0249/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2844.0,4924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1220025,42.3855196]}},{"type":"Feature","properties":{"resourceCoords":[1020.0,4924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.123047,42.385178]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0250/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p250","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0250/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0250/info.json","type":"ImageService2","height":7680,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6608.0,0.0 6608.0,2220.0 5896.6,1832.7 2851.5,7633.3 804.3,7217.9 1050.6,4823.7 2169.0,142.3 6608.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0250/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12294258393746,42.38753017315552]}},{"type":"Feature","properties":{"resourceCoords":[6608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11915932405753,42.38880094216002]}},{"type":"Feature","properties":{"resourceCoords":[6608.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11717375072337,42.38553032863788]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12095701060329,42.38425955963338]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0251/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p251","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0251/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0251/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5376.4,7680.0 5387.0,7611.3 5135.5,7494.0 1475.8,7378.0 1562.7,3994.5 1315.5,2865.4 883.6,2099.1 770.5,1646.7 833.6,985.9 1200.7,317.7 3961.9,956.1 4173.7,0.0 6600.0,0.0 6600.0,5729.3 5366.6,6918.7 5923.0,7431.2 6328.6,7680.0 5376.4,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0251/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14822347568509,42.37776627686791]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.15047873506415,42.3835580413716]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14141883644092,42.38551021581682]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13916357706185,42.37971845131313]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__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 | 1950 | sanborn03701_007 p252 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6608.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252/info.json","type":"ImageService2","height":7680,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2796.0,7233.0 4740.0,7514.6 6408.6,3726.9 2767.7,1597.7 831.3,0.0 416.7,0.0 409.5,7224.3 2796.0,7233.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2440.0,3416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.139373,42.3829]}},{"type":"Feature","properties":{"resourceCoords":[2440.0,7228.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.138776,42.38117]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__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 | 1950 | sanborn03701_007 p252 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4209.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2398.8"},{"label":"split_canvas_h","value":"2136.8"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252/info.json","type":"ImageService2","height":7680,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6608.0,1771.5 6608.0,0.0 4209.2,-0.0 4209.2,423.3 4453.6,393.9 6608.0,1771.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0252__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[4209.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14108540304863,42.384428291618846]}},{"type":"Feature","properties":{"resourceCoords":[6608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1395999119882,42.384571734309134]}},{"type":"Feature","properties":{"resourceCoords":[6608.0,2136.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13942686981058,42.38359634833546]}},{"type":"Feature","properties":{"resourceCoords":[4209.2,2136.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14091236087101,42.38345290564517]}},{"type":"Feature","properties":{"resourceCoords":[6296.2,1536.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1396687,42.3838523]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0253/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p253","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0253/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0253/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,0.0 6600.0,7680.0 5092.5,7680.0 4959.4,6750.3 4206.1,6143.8 3905.4,6011.0 2823.0,6002.3 2804.2,7394.9 1060.9,7377.9 538.7,5279.6 1243.4,4740.8 551.2,3831.6 1208.0,3150.5 750.3,3269.1 0.0,3313.5 -0.0,-0.0 6600.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0253/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1454467193116,42.38575246841923]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14138153874002,42.39101396793325]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1331504700922,42.38749538557258]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13721565066378,42.38223388605856]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0254/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p254","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0254/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0254/info.json","type":"ImageService2","height":7680,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"936.0,6586.3 932.6,624.5 3275.5,617.2 5219.1,2023.9 5719.3,5614.3 5628.0,7288.3 936.0,6586.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0254/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5456.0,3412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1343407,42.3863788]}},{"type":"Feature","properties":{"resourceCoords":[2420.0,6824.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.133488,42.384376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0255/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p255","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0255/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0255/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6252.9,6629.6 375.1,7399.7 370.1,2096.0 1008.9,213.6 6361.0,2385.9 6252.9,6629.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0255/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13137811370392,42.38654618751366]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12827210012479,42.384630024211425]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13126962391102,42.3819415380865]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13437563749015,42.383857701388735]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0256/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p256","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"19"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0256/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0256/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1945.4,7588.8 440.1,3652.3 432.1,173.2 5619.5,268.0 6150.3,4563.1 1945.4,7588.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0256/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3936.0,6148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1357956,42.381415]}},{"type":"Feature","properties":{"resourceCoords":[5620.0,268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.133038,42.383355]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0257/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p257","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0257/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0257/info.json","type":"ImageService2","height":7680,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5201.6,6135.3 1402.5,6163.5 1392.9,3041.9 -0.0,1151.0 719.1,191.0 1598.4,812.5 3932.7,999.2 3929.7,1380.7 6600.0,1359.5 6600.0,3758.7 5153.8,3758.4 5201.6,6135.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0257/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3876.0,3760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1255938,42.3867962]}},{"type":"Feature","properties":{"resourceCoords":[6152.0,3760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1250418,42.3858426]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0258/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p258","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"23"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0258/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0258/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5284.0,989.4 5577.1,5106.7 6166.0,6752.1 428.3,6934.2 478.6,777.5 5284.0,989.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0258/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4744.0,3740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.128034,42.385056]}},{"type":"Feature","properties":{"resourceCoords":[3004.0,6900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.130263,42.38513]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0259/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p259","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0259/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0259/info.json","type":"ImageService2","height":7680,"width":6524},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2873.9,6374.2 2393.6,6020.1 719.8,3638.3 4855.6,729.9 4868.9,6822.4 4805.5,6928.9 2873.9,6374.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0259/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12985721354104,42.38743324054543]}},{"type":"Feature","properties":{"resourceCoords":[6524.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12899949831876,42.39037481774129]}},{"type":"Feature","properties":{"resourceCoords":[6524.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1243439609328,42.389623803651986]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12520167615509,42.386682226456124]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0260__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 | 1950 | sanborn03701_007 p260 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0260__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0260/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4064.7,1246.7 2978.4,1257.2 958.1,2482.3 3609.9,6309.8 4007.5,5929.6 4050.5,2410.2 4443.9,1301.9 6572.0,2042.2 6572.0,0.0 4086.3,41.9 4064.7,1246.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0260__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2060.0,4164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1228642,42.3875856]}},{"type":"Feature","properties":{"resourceCoords":[2008.0,1820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1242687,42.3877951]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0261/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p261","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0261/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0261/info.json","type":"ImageService2","height":7680,"width":6524},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3297.0,7091.6 992.9,4167.5 579.7,3913.5 888.2,3150.4 1069.4,2306.3 2477.0,2755.7 3375.4,0.0 5664.1,0.0 5714.7,455.8 6524.0,365.9 6524.0,1241.3 5468.8,1505.9 5441.7,2493.4 5380.2,2507.8 5935.2,4721.1 6378.9,4609.8 6385.6,5287.7 5339.4,7379.0 5341.9,5673.6 3297.0,7091.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0261/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1116.0,2084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1343407,42.3863788]}},{"type":"Feature","properties":{"resourceCoords":[1456.0,4716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1309867,42.3861785]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__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 | 1950 | sanborn03701_007 p262 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3888.0"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"3792.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1992.0,7680.0 2680.0,7680.0 6572.0,7680.0 6572.0,3896.4 0.0,3888.0 -0.0,7680.0 1992.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1304.0,6396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.156604,42.391785]}},{"type":"Feature","properties":{"resourceCoords":[1108.0,7372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1570724,42.3909503]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__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 | 1950 | sanborn03701_007 p262 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"3896.4"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6572.0,378.1 1041.1,288.3 1104.8,579.7 1088.6,864.8 1074.4,1000.7 1029.7,1345.2 -0.0,1495.0 0.0,3888.0 6572.0,3896.4 6572.0,378.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0262__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4640.0,388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1367937,42.39375]}},{"type":"Feature","properties":{"resourceCoords":[1072.0,388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1405059,42.3940221]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0263/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p263","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"12"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0263/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0263/info.json","type":"ImageService2","height":7680,"width":6524},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5551.9,6495.0 6524.0,6756.7 6524.0,7680.0 1918.2,7680.0 1920.1,7552.4 -0.0,7014.5 -0.0,339.2 3202.9,721.7 3204.0,0.0 5796.4,0.0 5178.2,468.0 5159.3,883.4 4815.3,914.3 5551.9,6495.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0263/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5264.0,4348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1306679,42.3918037]}},{"type":"Feature","properties":{"resourceCoords":[1884.0,568.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1328755,42.3935]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0264/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p264","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0264/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0264/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.2,261.2 787.1,245.8 5848.4,1435.2 6120.6,6315.5 1531.5,5775.1 81.2,261.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0264/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13106320302552,42.39351048720526]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12703125076204,42.393244065575516]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1274498487241,42.38973965418601]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13148180098757,42.390006075815755]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0265/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p265","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0265/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0265/info.json","type":"ImageService2","height":7680,"width":6504},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1307.9,7680.0 3260.0,6692.3 368.1,2784.7 1444.5,2190.5 3278.0,541.0 3638.8,0.0 6176.5,447.9 5958.8,1929.9 5974.7,4960.7 6504.0,4858.7 6504.0,7472.6 6082.5,7680.0 1307.9,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0265/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12666117460678,42.393729101457254]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1235041853033,42.39186880109793]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12645761233598,42.38909617498216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12961460163946,42.39095647534148]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0266/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p266","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0266/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0266/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1542.3,5343.9 1632.7,1054.9 4412.8,876.8 4813.0,3910.9 3024.5,4810.1 4138.6,6883.1 2445.7,7680.0 2116.5,7680.0 2067.0,5235.2 1542.3,5343.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0266/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.124299,42.3925837]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1211288,42.3906637]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1241666,42.3879276]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1273368,42.3898476]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0267/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p267","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0267/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0267/info.json","type":"ImageService2","height":7680,"width":6504},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4499.9,5549.1 3603.7,6811.0 3506.5,6604.0 2709.8,7373.2 725.2,5052.2 1132.3,4516.7 0.0,1160.6 0.0,-0.0 5273.5,0.0 5288.3,1815.5 5065.4,3419.7 5245.3,3470.1 4499.9,5549.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0267/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12425112357693,42.388919804134325]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1221125555262,42.39146333389824]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1180745337155,42.38958508729153]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12021310176623,42.38704155752762]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0268/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p268","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0268/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0268/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"821.5,4580.7 1304.3,3176.9 1410.0,389.1 5467.7,380.6 5456.1,1076.3 6572.0,703.4 6572.0,7680.0 1466.8,7680.0 709.0,6892.2 1383.7,4758.5 821.5,4580.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0268/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12178038334353,42.390016074576295]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11872940713621,42.39204865792176]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11553593829012,42.38939679036344]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11858691449744,42.387364207017974]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0269/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p269","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"14"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0269/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0269/info.json","type":"ImageService2","height":7680,"width":6504},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 6504.0,0.0 6504.0,7680.0 5287.1,7559.5 -0.0,7680.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0269/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2340.0,5576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1345526,42.4012963]}},{"type":"Feature","properties":{"resourceCoords":[6180.0,5268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1323895,42.4005176]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0270/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p270","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0270/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0270/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7680.0 0.0,-0.0 6108.7,0.0 5802.5,185.3 5758.5,2130.0 5623.5,2112.0 5585.2,3121.2 6572.0,3158.7 6572.0,3362.9 5494.8,3230.0 5450.3,5194.5 6284.8,5259.7 6252.5,7510.9 1971.8,6806.7 1989.8,7055.5 1834.8,7680.0 -0.0,7680.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0270/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14335346367129,42.40029286989985]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13520813781993,42.400567094210494]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13477724429053,42.393488096460366]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.14292257014189,42.39321387214972]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0271/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p271","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0271/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0271/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1393.8 -0.0,529.7 3785.8,2631.7 5338.2,3717.0 5481.6,3615.4 4625.6,2919.2 6572.0,1155.3 6572.0,7680.0 -0.0,7680.0 -0.0,5647.4 272.8,5673.4 212.8,1758.9 814.5,1362.8 -0.0,1393.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0271/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13629058239681,42.40116982448585]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13223925132372,42.401191803902115]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1322047135563,42.39767095847369]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13625604462939,42.39764897905742]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0272/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p272","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0272/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0272/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"451.2,3617.1 -0.0,3565.6 -0.0,2942.8 2165.8,2992.1 2195.5,1688.2 5099.0,4240.3 5379.9,3925.1 6559.3,5423.9 4314.8,7119.3 451.2,7109.3 451.2,3617.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0272/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13360749332664,42.39902465324657]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12952059883668,42.399116020942884]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12937703025014,42.39556417593084]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1334639247401,42.39547280823453]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0273/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p273","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0273/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0273/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5697.8,2979.5 5683.4,6503.0 676.0,6452.0 717.5,2403.0 2872.7,2645.4 2868.2,2234.4 5248.5,2297.6 5245.9,2926.0 5697.8,2979.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0273/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2356.0,2584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1353414,42.3974873]}},{"type":"Feature","properties":{"resourceCoords":[676.0,6452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1363025,42.3956885]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0274/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p274","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0274/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0274/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5854.4,1515.0 5901.2,6561.5 891.9,6033.6 867.8,1533.9 5854.4,1515.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0274/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4188.0,4396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1331488,42.3944249]}},{"type":"Feature","properties":{"resourceCoords":[4188.0,1540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.133194,42.395743]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0275/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p275","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0275/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0275/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"195.6,1430.5 1756.9,762.8 1689.8,590.6 1832.6,528.8 1899.1,703.5 3599.9,-0.0 5487.7,4755.6 4806.0,7295.7 632.4,6170.7 1240.9,4056.6 195.6,1430.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0275/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12861606540143,42.39688698259628]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12742087515345,42.39399427762315]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13196609167123,42.39295552068543]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.13316128191921,42.39584822565856]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0276/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p276","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0276/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0276/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5980.1,3998.3 1388.3,6975.1 1066.3,6710.6 1033.9,865.6 5566.6,794.2 5622.1,3520.3 5980.1,3998.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0276/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2956.0,3208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1283576,42.3939378]}},{"type":"Feature","properties":{"resourceCoords":[1044.0,768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1279184,42.3953363]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__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 | 1950 | sanborn03701_007 p277 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4064.8"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"3615.2"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7594.2 5685.6,7435.0 5681.3,4067.1 1351.8,4078.1 1376.5,4856.6 840.0,4856.6 854.4,7374.8 -0.0,7408.0 -0.0,7594.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[840.0,4856.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.127021,42.396429]}},{"type":"Feature","properties":{"resourceCoords":[2508.0,4856.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1263798,42.3958247]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__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 | 1950 | sanborn03701_007 p277 [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":"6572.0"},{"label":"split_canvas_h","value":"4081.6"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6572.0,1337.1 6572.0,-0.0 324.9,8.6 1019.4,3825.3 -0.0,3828.6 -0.0,4028.4 4953.7,4033.9 4958.0,3849.6 5969.6,3842.4 6035.1,1320.1 6572.0,1337.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0277__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4528.0,3857.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1288328,42.3962132]}},{"type":"Feature","properties":{"resourceCoords":[4528.0,1292.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1276095,42.3969686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0278/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p278","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0278/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0278/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6373.3,3103.7 3931.5,3142.0 3696.8,3709.6 2094.2,5817.7 1409.1,6316.9 1309.0,6229.2 1068.2,5712.2 1100.9,3245.8 451.9,3234.0 584.4,-0.0 6246.9,-0.0 6373.3,3103.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0278/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2604.0,5164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1264701,42.3925411]}},{"type":"Feature","properties":{"resourceCoords":[4456.0,3108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1246545,42.3925058]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0279__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 | 1950 | sanborn03701_007 p279 [1]","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"18"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"7680.0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0279__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0279/info.json","type":"ImageService2","height":7680,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,3843.6 -0.0,7680.0 419.5,7680.0 665.3,6352.1 826.5,6383.9 678.4,7401.1 4517.6,7400.4 4475.4,7680.0 4597.2,7680.0 5084.8,7680.0 5098.0,6705.6 5119.6,5442.8 6572.0,5465.2 6572.0,365.1 3533.1,857.3 -0.0,3843.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0279__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2780.0,4768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1306455,42.3989915]}},{"type":"Feature","properties":{"resourceCoords":[3532.0,532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1323895,42.4005176]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0280/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Cambridge, Massachusetts | 1950 | sanborn03701_007 p280","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:50:38Z","modified":"2026-09-21T19:50:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0280/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0280/info.json","type":"ImageService2","height":7680,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"562.8,6976.9 535.2,3518.6 -0.0,3503.4 -0.0,0.0 6592.0,-0.0 6592.0,381.2 6356.0,379.2 6592.0,1022.2 6592.0,1491.6 6025.1,1476.6 5999.5,5519.0 6592.0,5492.1 6592.0,5677.3 562.8,6976.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764cm:g03701195002:03701_02_1950-0280/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12093941072614,42.394110697942054]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.11816215197591,42.39184341309844]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.12171367861737,42.389436860299114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7680.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1244909373676,42.391704145142725]}}]}}]}