{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03698_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Brockton, Massachusetts | 1954 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"81"},{"label":"placed","value":"60"},{"label":"unplaced","value":"21"},{"label":"fit sources","value":"georef 37, georef-snap 20, snap:0 2, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 27 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 42.07085,-71.01753 +/-4247m); p105__3 (tier 1, 42.05220,-71.01831 +/-100m); p105__4 (tier 1, 42.05911,-71.02700 +/-100m); p105__5 (tier 1, 42.05438,-71.00915 +/-103m); p108 (tier 1, 42.08762,-71.00304 +/-238m); p47 (tier 1, 42.07998,-71.01185 +/-273m); p48__1 (tier 1, 42.11471,-70.93538 +/-268m); p48__2 (tier 1, 42.08359,-71.00992 +/-100m); p50 (tier 2, 42.07733,-71.00823 +/-444m); p54__1 (tier 1, 42.08132,-70.99940 +/-273m); p54__2 (tier 2, 42.08229,-70.99751 +/-422m); p54__3 (tier 2, 42.08229,-70.99751 +/-422m); p81__2 (tier 1, 42.05874,-71.02695 +/-100m); p87__2 (tier 2, 42.06228,-71.01396 +/-100m); p88__1 (tier 1, 42.07688,-71.02211 +/-100m); p88__2 (tier 2, 42.06081,-71.00939 +/-100m); p90__2 (tier 1, 42.06004,-71.00907 +/-100m); p90__3 (tier 1, 42.06015,-71.01391 +/-100m); p96__2 (tier 2, 42.05969,-71.00694 +/-132m); p96__3 (tier 2, 42.05969,-71.00694 +/-132m); p96__4 (tier 2, 42.05969,-71.00694 +/-132m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0100","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.8,0.0 1100.0,0.0 1100.0,1370.0 0.0,1370.0 0.0,385.6 89.0,398.9 81.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01120898227244,42.08627077082162]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01187915991557,42.089271033975564]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00687925242042,42.08989483068419]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00620907477729,42.086894567530244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p101","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0101","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.9,1208.1 249.4,305.1 1100.0,219.7 1100.0,1293.6 974.8,1282.3 968.8,1370.0 -0.0,1370.0 -0.0,1189.8 205.9,1208.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0101/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01079952302969,42.087245910649]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0067244129695,42.08744507895304]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00639251481617,42.08365183743088]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01046762487636,42.08345266912684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p102 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2248.8"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,541.0 0.0,1020.0 -0.0,1370.0 111.0,1370.0 134.7,1190.0 191.4,1158.9 273.3,1088.3 294.0,1089.8 301.1,1370.0 561.1,1370.0 562.2,1370.0 558.7,346.6 315.9,382.5 262.8,9.7 -0.0,25.8 0.0,541.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[303.1,921.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.011276,42.050582]}},{"type":"Feature","properties":{"resourceCoords":[303.1,284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.011986,42.0538809]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p102 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2230.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2170.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1032.0,1370.0 831.2,133.0 778.7,141.8 558.7,359.1 562.2,1370.0 1032.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0102__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[557.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01218571899015,42.05004779281152]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01016317331775,42.05008948719267]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01002167528756,42.046295752546456]}},{"type":"Feature","properties":{"resourceCoords":[557.5,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01204422095996,42.0462540581653]}},{"type":"Feature","properties":{"resourceCoords":[831.2,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01119,42.049885]}},{"type":"Feature","properties":{"resourceCoords":[831.2,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0111514,42.0497006]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p103","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0103","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"717.3,1370.0 -0.0,1370.0 -0.0,371.8 353.0,336.1 347.4,0.0 645.5,0.0 646.8,248.8 992.0,118.9 991.9,0.0 1100.0,0.0 1100.0,1370.0 816.1,1370.0 805.2,1288.8 717.3,1289.5 717.3,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[353.0,336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0420212,42.074602]}},{"type":"Feature","properties":{"resourceCoords":[1018.0,890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.036534,42.072127]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0104","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1041.0,0.0 1041.2,11.9 949.2,18.1 952.2,60.9 1042.0,61.2 1064.2,648.0 1049.7,1132.1 727.5,1134.7 715.9,1200.0 618.8,1150.3 602.5,1127.3 354.6,1128.0 361.8,711.1 250.7,709.0 248.8,830.6 -0.0,917.1 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04034460520879,42.08050201818487]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03252317948734,42.08149158135677]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03087436086824,42.07421022426495]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03869578658968,42.07322066109305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p105 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"3200.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"422.8,0.0 -0.0,-0.0 -0.0,800.0 534.2,793.5 955.3,788.0 962.0,788.0 980.0,708.2 1100.0,715.9 1100.0,84.2 935.7,85.3 904.8,323.6 494.3,326.7 517.3,246.9 368.1,203.0 422.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[676.0,555.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01934,42.056086]}},{"type":"Feature","properties":{"resourceCoords":[306.0,185.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0230484,42.057071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p105 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3174.0"},{"label":"split_canvas_w","value":"2151.2"},{"label":"split_canvas_h","value":"2306.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,834.9 -0.0,1370.0 537.8,1370.0 536.4,1104.8 534.2,793.5 0.0,800.0 0.0,834.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0105__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,793.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0672501188484,42.06099690362268]}},{"type":"Feature","properties":{"resourceCoords":[537.8,793.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06543796648515,42.060378532112665]}},{"type":"Feature","properties":{"resourceCoords":[537.8,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06632497204845,42.05892540062581]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0681371244117,42.05954377213582]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p106","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0106","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.5,1099.9 771.5,854.7 477.8,852.1 480.3,1183.3 132.2,1215.4 130.8,1370.0 -0.0,1370.0 -0.0,0.0 1100.0,0.0 1100.0,174.8 866.8,177.1 874.1,1060.6 770.5,1099.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[772.0,768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.040347,42.077154]}},{"type":"Feature","properties":{"resourceCoords":[624.0,248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0420645,42.0798961]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p107","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0107","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,885.5 88.7,884.8 99.8,966.4 386.5,966.7 385.9,0.0 632.8,0.0 742.0,64.4 752.2,0.0 801.0,6.6 821.1,218.9 953.9,262.9 1072.6,275.2 1074.2,114.5 1100.0,114.2 1100.0,1232.2 1088.1,1233.6 1095.1,1370.0 -0.0,1370.0 -0.0,885.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0107/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03926661341589,42.07450977211534]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03128157407622,42.075410941672]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02978018156534,42.06797655593697]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03776522090502,42.06707538638032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0046","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1185.9 -0.0,-0.0 1100.0,0.0 1100.0,591.1 970.0,573.8 925.3,796.4 921.6,1023.0 949.6,1209.5 1034.0,1370.0 749.9,1370.0 739.4,1072.6 482.6,1047.2 482.6,1370.0 80.6,1370.0 79.8,1188.3 -0.0,1185.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01750124709662,42.081615291355575]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01339866369797,42.08167449195623]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01330001945391,42.077855334653755]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01740260285256,42.0777961340531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p49","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0049","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1370.0 -0.0,1103.5 139.5,944.5 258.1,869.9 -0.0,713.4 0.0,0.0 1100.0,0.0 1100.0,57.2 1024.2,121.3 1011.5,504.1 1100.0,506.3 1100.0,1049.3 1029.0,1046.0 1025.0,1296.8 864.2,1249.4 863.3,1370.0 -0.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1029.0,1046.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.006895,42.078597]}},{"type":"Feature","properties":{"resourceCoords":[213.0,486.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.010083,42.080013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0051","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1065.5 -0.0,0.0 333.1,0.0 286.3,163.9 540.1,166.1 537.3,238.3 1086.8,234.1 1071.0,1174.0 1013.7,1172.5 1008.7,1370.0 0.0,1370.0 0.0,1116.8 27.1,1066.1 0.0,1065.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00739714170255,42.07708502044873]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00762018567853,42.08011296626242]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00257489041122,42.08032060471018]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00235184643525,42.07729265889649]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0052","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.5,0.0 435.0,0.0 502.1,74.8 559.9,72.9 557.5,0.0 1100.0,0.0 1100.0,87.0 980.4,83.1 963.0,557.3 1019.1,569.0 1028.2,593.5 1080.4,907.8 952.6,937.7 944.4,1190.6 1100.0,1195.7 1100.0,1370.0 36.4,1370.0 48.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00708181192333,42.07996879842201]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0072025462143,42.08300878966648]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0021369523806,42.08312117984687]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00201621808962,42.0800811886024]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p53","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0053","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1081.6,142.7 1081.8,42.7 1100.0,42.8 1100.0,1370.0 0.0,1370.0 0.0,0.0 577.6,0.0 564.5,26.0 567.4,154.2 1081.6,142.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0033403,42.0741996]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0035998,42.0801437]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9936257,42.0803836]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9933662,42.0744395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p55","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0055","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,-0.0 1100.0,1155.3 617.0,1130.8 616.8,1112.3 403.5,1114.7 406.8,1370.0 -0.0,1370.0 -0.0,0.0 1100.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[457.0,479.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9853576,42.0904246]}},{"type":"Feature","properties":{"resourceCoords":[253.0,479.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9856333,42.0915451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p56","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0056","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"815.0,1243.5 504.9,1305.8 480.8,1315.6 471.4,1370.0 -0.0,1370.0 -0.0,941.5 125.2,944.3 61.2,0.0 1100.0,0.0 1100.0,1370.0 848.8,1370.0 815.0,1243.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[539.0,535.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.004865,42.084994]}},{"type":"Feature","properties":{"resourceCoords":[202.0,946.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.006125,42.083858]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p57","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0057","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.2,95.7 -0.0,83.4 -0.0,0.0 1100.0,0.0 1100.0,1215.1 867.0,1213.0 869.1,1103.9 697.9,1091.2 696.7,1210.5 461.7,1207.8 449.4,1370.0 125.0,1370.0 173.2,95.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[867.0,1213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0293698,42.078552]}},{"type":"Feature","properties":{"resourceCoords":[703.0,592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.030507,42.08012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p58","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0058","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,891.4 938.4,870.5 945.5,1111.2 967.3,1140.5 140.3,1173.8 114.2,1370.0 83.2,1370.0 103.0,1172.5 82.5,1171.8 112.5,0.0 1100.0,0.0 1100.0,891.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[324.0,1173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.027649,42.0788682]}},{"type":"Feature","properties":{"resourceCoords":[97.0,134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.029477,42.0815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p59","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0059","type":"ImageService3","width":1100,"height":1363},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.9,1121.5 123.5,318.9 445.4,295.0 445.6,133.1 679.0,118.5 671.4,0.0 842.3,0.0 848.2,108.4 1100.0,92.0 1100.0,1363.0 -0.0,1363.0 -0.0,1109.9 101.9,1121.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[679.0,118.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0299897,42.0784481]}},{"type":"Feature","properties":{"resourceCoords":[445.0,581.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0305757,42.0770706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0060","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.5,118.4 1016.1,79.0 809.4,1274.2 644.6,1370.0 25.2,1370.0 156.5,118.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02897080704355,42.07894845432968]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02505325160551,42.07965623346413]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02387394090064,42.07600919427892]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02779149633868,42.075301415144466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p61","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0061","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1038.0,1209.0 509.4,1212.7 512.1,1084.5 229.9,1084.3 278.6,279.3 262.0,266.9 236.4,240.4 198.1,0.0 776.0,0.0 775.4,161.9 1002.9,118.8 1040.0,488.8 1038.0,1209.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1038.0,1209.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0220355,42.0771308]}},{"type":"Feature","properties":{"resourceCoords":[520.0,210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.024431,42.079669]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p62","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0062","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"267.0,1249.0 265.8,590.2 227.2,220.5 -0.0,264.4 -0.0,0.0 1100.0,0.0 1100.0,844.6 903.0,847.9 906.0,1249.0 267.0,1249.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[267.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0220627,42.0772983]}},{"type":"Feature","properties":{"resourceCoords":[906.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0197129,42.077526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p63","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"31"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0063","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.9,1234.7 -0.0,1062.4 -0.0,708.5 0.0,0.0 213.1,0.0 1059.8,154.2 1100.0,524.5 1100.0,524.5 1100.0,646.4 897.4,1207.8 846.8,1315.8 399.4,1361.4 178.9,1234.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[733.0,1065.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.026224,42.070378]}},{"type":"Feature","properties":{"resourceCoords":[455.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.029959,42.075162]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p64","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0064","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"82.2,974.1 -0.0,984.1 -0.0,415.9 152.3,397.7 179.0,0.0 467.3,0.0 464.6,128.2 993.4,124.2 986.5,945.1 603.5,943.3 603.6,1084.8 428.5,1084.8 436.2,1217.3 141.3,1243.2 82.2,974.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[987.0,660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.021796,42.075665]}},{"type":"Feature","properties":{"resourceCoords":[987.0,366.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0219402,42.076468]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p65","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0065","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1023.4,1217.9 375.0,1277.5 377.3,1087.2 -0.0,1086.8 -0.0,946.8 379.0,949.0 387.4,76.0 1020.0,78.5 1023.4,1217.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1017.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.019476,42.076152]}},{"type":"Feature","properties":{"resourceCoords":[379.0,949.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.021658,42.074886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p66","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0066","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"738.2,986.2 715.6,1157.0 90.3,1136.8 107.8,0.0 782.2,0.0 755.5,209.3 834.5,221.8 812.1,403.4 888.6,413.1 846.9,692.8 949.7,706.4 905.4,986.6 738.2,986.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[778.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0170753,42.0770189]}},{"type":"Feature","properties":{"resourceCoords":[101.0,593.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0196197,42.0769945]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0067","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"830.1,109.4 813.2,0.0 1094.4,0.0 1100.0,910.1 1028.3,911.7 1029.8,1085.8 898.1,1334.2 964.9,1370.0 0.0,1370.0 350.3,1277.9 288.0,1017.1 0.0,918.5 0.0,473.8 139.1,456.6 80.0,146.5 505.2,160.2 830.1,109.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01647426043121,42.073968048412475]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01643035225516,42.07704146140093]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01130958477627,42.0770005836468]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01135349295232,42.073927170658344]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p68 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.3,1370.0 718.6,1370.0 708.2,1255.7 624.3,736.0 628.0,728.6 480.8,755.5 348.9,838.0 349.3,562.4 633.0,546.4 652.0,302.0 343.9,308.6 337.2,0.0 69.2,0.0 68.6,964.5 0.0,965.4 0.0,1313.2 159.3,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[652.0,302.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.015626,42.078722]}},{"type":"Feature","properties":{"resourceCoords":[78.0,570.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.014578,42.0770427]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p68 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"2497.2"},{"label":"split_canvas_y","value":"1479.6"},{"label":"split_canvas_w","value":"1902.8"},{"label":"split_canvas_h","value":"4000.4"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"817.7,1370.0 1100.0,1370.0 1100.0,926.5 1025.2,815.9 1044.1,377.6 787.5,412.7 662.2,660.9 817.7,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0068__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[624.3,369.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01121787238016,42.07950314576925]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,369.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00966171985303,42.078870437535464]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01145143014367,42.0764375212649]}},{"type":"Feature","properties":{"resourceCoords":[624.3,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0130075826708,42.07707022949869]}},{"type":"Feature","properties":{"resourceCoords":[970.1,1182.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.011541,42.0770663]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p69","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0069","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1274.5 -0.0,430.6 279.6,398.1 252.7,155.7 524.9,131.8 517.2,0.0 1070.7,0.0 1067.0,427.1 1100.0,424.2 1100.0,626.6 1065.0,630.8 1062.2,1163.6 -0.0,1274.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[831.0,656.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.022157,42.072616]}},{"type":"Feature","properties":{"resourceCoords":[1065.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.021305,42.07277]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0070","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"909.8,1041.5 951.1,1353.9 207.3,1361.8 232.1,592.0 267.4,588.8 272.9,386.5 239.8,388.4 247.7,152.7 904.2,111.3 909.8,1041.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02250574921767,42.07428552832744]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01848214707208,42.0747741870871]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01766799962063,42.0710281384166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02169160176622,42.07053947965694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p71","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"12"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0071","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"795.7,173.0 818.2,0.0 1100.0,0.0 1100.0,336.1 992.9,904.8 1000.3,1370.0 183.9,1370.0 162.3,154.2 795.7,173.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[171.0,807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.018989,42.073737]}},{"type":"Feature","properties":{"resourceCoords":[796.0,173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017049,42.075697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p72","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0072","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"764.5,258.2 795.4,755.5 734.9,790.1 781.0,984.5 680.3,994.7 689.4,1160.8 188.2,1210.3 76.2,384.4 75.0,246.4 764.5,258.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[395.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017571,42.072826]}},{"type":"Feature","properties":{"resourceCoords":[111.0,628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.018288,42.071193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0073","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.8,142.1 5.5,0.0 508.4,0.0 498.8,118.1 961.6,147.5 1100.0,174.8 1085.1,506.4 943.3,490.6 838.0,931.1 1100.0,1097.0 1100.0,1370.0 0.0,1370.0 0.0,154.5 70.8,142.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01569035858152,42.07113172339501]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01658648465612,42.074074351601865]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01168378591957,42.07490865702096]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01078765984498,42.07196602881411]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p74","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0074","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,191.5 561.8,0.0 837.9,0.0 836.1,307.9 1100.0,352.9 1100.0,1370.0 36.9,1370.0 -0.0,1208.0 -0.0,191.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[669.0,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.013806,42.07207]}},{"type":"Feature","properties":{"resourceCoords":[56.0,1269.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0141812,42.0683522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p75","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0075","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"25.5,0.0 19.5,86.5 1100.0,50.9 1100.0,1370.0 538.5,1370.0 533.0,1237.1 329.1,1301.6 64.7,1307.0 67.4,1370.0 -0.0,1370.0 -0.0,0.0 25.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0075/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02505459526253,42.07083301708153]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02110506061881,42.07144016343947]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02009355652446,42.067762877164824]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02404309116818,42.06715573080689]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p76","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0076","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"190.5,325.7 909.2,395.3 923.0,935.4 150.6,909.5 190.5,325.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[918.0,660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017925,42.0703]}},{"type":"Feature","properties":{"resourceCoords":[167.0,390.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.020911,42.070468]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p77","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"15"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0077","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.0,220.7 254.9,83.5 475.1,89.7 484.0,226.0 942.5,206.0 930.8,97.0 1000.5,99.0 950.6,598.6 984.2,601.9 979.8,680.5 953.2,678.8 903.6,1091.8 73.5,1216.8 77.7,1268.5 492.2,1231.6 503.4,1370.0 -0.0,1370.0 -0.0,184.2 241.0,220.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[484.0,226.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.028108,42.068337]}},{"type":"Feature","properties":{"resourceCoords":[886.0,1098.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.023411,42.06446]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0078","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.1,552.5 35.4,336.8 295.9,322.5 494.7,251.9 504.7,382.8 985.0,366.1 985.5,507.0 822.1,519.2 889.5,1370.0 720.2,1370.0 720.1,1331.5 -0.0,1370.0 -0.0,556.1 52.1,552.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02419617695824,42.068266686674384]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02016680076687,42.068777692419395]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01931550207344,42.06502591214351]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02334487826481,42.0645149063985]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0079","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.9,482.3 250.5,484.7 266.2,0.0 1060.0,0.0 1093.8,1262.5 496.4,1269.5 466.5,1370.0 233.3,1370.0 240.0,1270.6 6.3,1271.8 -0.0,626.7 166.8,625.5 175.9,482.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02139563631862,42.06889015202572]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01748969254074,42.06959027075857]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01632333120632,42.06595346307641]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0202292749842,42.06525334434357]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p80","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0080","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"843.5,801.2 835.8,950.0 1100.0,915.0 1100.0,1370.0 1061.9,1370.0 1058.8,975.5 61.5,986.3 64.0,164.0 564.7,165.2 572.4,0.0 673.0,0.0 778.7,796.5 843.5,801.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[841.0,849.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0141812,42.0683522]}},{"type":"Feature","properties":{"resourceCoords":[64.0,164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0176557,42.0696347]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0081__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p81 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0081__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0081","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1370.0 1066.9,1370.0 1100.0,1130.4 1100.0,348.5 1001.1,3.4 284.2,1.0 285.5,335.0 0.0,334.7 -0.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0081__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[390.0,1203.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0236206,42.0570039]}},{"type":"Feature","properties":{"resourceCoords":[590.0,215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.025481,42.062411]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0082","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"920.3,192.1 913.7,737.8 979.6,735.9 963.1,957.0 1100.0,968.7 1100.0,1370.0 1046.7,1370.0 1030.0,1232.3 427.9,1222.8 425.1,1109.8 403.1,1112.4 336.2,761.0 96.3,768.9 122.4,1221.7 -0.0,1223.6 12.8,120.5 755.5,137.3 751.8,175.7 920.3,192.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02357419116385,42.064773891910484]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01962891719346,42.06557382803927]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01829635070999,42.06190016467413]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02224162468038,42.06110022854534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0083","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1091.3,1231.8 52.3,1156.1 66.2,933.8 -0.0,936.5 -0.0,168.1 119.3,169.3 119.3,169.5 230.7,170.8 222.3,268.8 452.5,272.8 483.7,174.2 1073.3,177.5 1091.3,1231.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0083/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02044593951136,42.065967943258826]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01650567911338,42.066728806433765]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01523817875616,42.063059878658486]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01917843915415,42.062299015483546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0084","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.6,1181.1 74.9,0.0 1100.0,0.0 1100.0,1370.0 1037.8,1370.0 1040.2,1061.0 802.9,1058.5 802.9,1059.8 326.8,1053.7 320.9,1181.4 71.6,1181.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0171309466268,42.06736655772293]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01327068043321,42.068168483108124]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01193474504637,42.06457412350064]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01579501123997,42.063772198115444]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p85","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0085","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.7,63.8 500.2,112.4 492.7,0.0 514.9,0.0 504.1,112.8 1100.0,192.5 1100.0,879.4 1064.0,874.6 1063.0,1170.2 123.3,1232.8 131.2,1370.0 -0.0,1370.0 -0.0,-0.0 87.3,0.0 79.7,63.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1064.0,875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017856,42.06043]}},{"type":"Feature","properties":{"resourceCoords":[1064.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.018812,42.062193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p86","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0086","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"989.9,1039.3 449.6,1127.6 447.2,1074.4 45.2,1091.3 81.4,194.4 963.1,160.7 989.9,1039.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[544.0,1146.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0184782,42.061595]}},{"type":"Feature","properties":{"resourceCoords":[991.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017856,42.06043]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0087__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p87 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0087__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0087","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"511.5,1201.3 528.9,1009.3 837.9,1019.6 775.5,820.8 775.4,595.3 1100.0,595.3 1100.0,0.0 395.9,0.0 391.0,126.7 145.0,129.0 145.0,1183.0 511.5,1201.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0087__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[145.0,1183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0147197,42.0615258]}},{"type":"Feature","properties":{"resourceCoords":[145.0,129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.015728,42.06432]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p89","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0089","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1370.0 0.0,0.0 692.3,0.0 696.9,25.1 765.7,0.0 1100.0,0.0 1100.0,1194.3 675.2,1370.0 -0.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[522.0,566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.008486,42.063655]}},{"type":"Feature","properties":{"resourceCoords":[932.0,1230.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0070639,42.0617561]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0090__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p90 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0090__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0090","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"195.4,717.9 149.9,963.2 152.2,1370.0 745.9,1370.0 747.5,906.9 787.7,906.5 789.8,794.5 897.0,709.4 1100.0,710.2 1100.0,0.0 0.0,-0.0 -0.0,367.7 50.3,377.0 50.3,389.9 87.1,383.9 251.8,414.4 190.4,716.5 195.4,717.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0090__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[510.0,321.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.004418,42.065864]}},{"type":"Feature","properties":{"resourceCoords":[632.0,112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0037345,42.067105]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p91","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0091","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,1065.7 474.8,1183.2 443.6,1024.7 145.0,1061.5 149.9,129.3 1098.5,152.7 1100.0,1065.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[145.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.017856,42.06043]}},{"type":"Feature","properties":{"resourceCoords":[443.0,141.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0143218,42.0602828]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p92","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0092","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1052.5,1370.0 -0.0,1370.0 -0.0,844.8 241.7,806.2 96.9,167.2 912.9,136.9 923.9,696.3 1015.7,681.5 1052.5,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[707.0,515.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.014505,42.057349]}},{"type":"Feature","properties":{"resourceCoords":[343.0,515.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.015816,42.057131]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0093","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"139.8,184.6 502.9,190.6 515.2,0.0 990.7,0.0 995.2,35.6 1100.0,23.7 1100.0,1370.0 794.8,1038.1 147.3,1047.0 139.8,184.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0093/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0153785692196,42.061937250045]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01140409054506,42.06262494367429]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01025855483631,42.05892391623815]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01423303351086,42.05823622260886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0094","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,1193.4 1100.0,1370.0 108.0,1370.0 90.9,779.7 -0.0,792.2 -0.0,241.8 87.4,240.0 86.5,0.0 729.0,0.0 1027.2,333.4 1031.8,0.0 1100.0,0.0 1100.0,318.6 1059.9,599.0 1100.0,758.5 1100.0,1193.4 1100.0,1193.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0094/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01428479270781,42.059143337319824]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01029212402443,42.059877418268236]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00906937205164,42.05615928785817]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01306204073504,42.05542520690976]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p95","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0095","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 236.3,0.0 327.1,219.7 637.0,279.0 637.2,0.0 804.2,0.0 802.8,244.9 913.8,222.1 913.7,190.2 1087.4,186.9 1100.0,105.2 1100.0,1370.0 392.0,1370.0 220.8,1246.3 -0.0,1324.7 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[917.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.006545,42.059162]}},{"type":"Feature","properties":{"resourceCoords":[637.0,201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.00809,42.0616147]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0096__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p96 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4400.0"},{"label":"split_canvas_h","value":"5480.0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0096__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0096","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,1370.0 1100.0,764.0 866.8,763.2 802.3,608.7 804.6,470.2 1100.0,467.5 1100.0,32.5 974.5,386.4 342.9,157.1 341.2,150.2 233.4,0.0 -0.0,-0.0 0.0,556.0 165.4,554.8 318.9,553.2 318.8,890.6 165.5,888.9 0.0,887.7 0.0,887.8 -0.0,1370.0 1100.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0096__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[523.0,353.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0073922,42.0580199]}},{"type":"Feature","properties":{"resourceCoords":[721.0,321.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0067491,42.058381]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p97","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0097","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.4,868.7 354.1,-0.0 1100.0,-0.0 1100.0,872.5 299.4,868.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[912.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.011986,42.0538809]}},{"type":"Feature","properties":{"resourceCoords":[106.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0128883,42.0560089]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0098","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1370.0 0.0,0.0 212.9,-0.0 212.9,18.5 659.5,50.0 694.8,48.4 695.4,-0.0 1100.0,-0.0 1100.0,1370.0 -0.0,1370.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9901260412995,42.090079600903756]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.98854940869433,42.0840402423341]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.99861366074882,42.08257268330727]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.000190293354,42.08861204187693]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brockton, Massachusetts | 1954 | sanborn03698_006 p99","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T02:49:26Z","modified":"2026-09-22T02:49:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0099","type":"ImageService3","width":1100,"height":1370},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1100.0,1237.5 892.3,1229.1 899.1,1370.0 -0.0,1370.0 0.0,-0.0 660.1,0.0 705.6,304.3 1100.0,238.2 1100.0,1237.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g03698195402:03698_02_1954-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01388268635705,42.08730025780516]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00982235568131,42.08735223026684]}},{"type":"Feature","properties":{"resourceCoords":[1100.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.00973574771632,42.08357274530461]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1370.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.01379607839206,42.08352077284293]}}]}}]}