{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03745_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Haverhill, Massachusetts | 1949 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"105"},{"label":"placed","value":"88"},{"label":"unplaced","value":"17"},{"label":"fit sources","value":"georef-snap 46, georef 45, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.78254,-71.07438 +/-256m); p11__2 (tier 1, 42.77383,-71.09400 +/-100m); p31__2 (tier 1, 42.76759,-71.10455 +/-100m); p57 (tier 1, 42.76543,-71.03646 +/-242m); p5__1 (tier 2, 42.77018,-71.09519 +/-126m); p73 (tier 1, 42.76967,-71.06873 +/-259m); p77 (tier 1, 42.74000,-71.04453 +/-254m); p78__2 (tier 4, 42.77516,-71.07862 +/-4877m); p80__1 (tier 1, 42.76933,-71.07956 +/-237m); p81 (tier 4, 42.77516,-71.07862 +/-4877m); p82 (tier 1, 42.76017,-71.08094 +/-256m); p83__1 (tier 1, 42.76124,-71.08298 +/-184m); p83__2 (tier 1, 42.77457,-71.08974 +/-184m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p1","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/info.json","type":"ImageService2","height":7916,"width":6816},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5452.6,2083.3 5599.0,2301.3 5213.9,4484.6 5462.9,4580.4 4854.0,5535.4 4822.6,7593.9 5815.3,7916.0 -0.0,7916.0 0.0,0.0 5118.8,0.0 4857.1,668.4 4759.6,1587.1 5452.6,2083.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2316.0,4388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.104283,42.765472]}},{"type":"Feature","properties":{"resourceCoords":[2180.0,856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.1067,42.767959]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/info.json","type":"ImageService2","height":7916,"width":6820},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"482.7,892.3 -0.0,974.7 0.0,0.0 1350.5,0.0 1256.6,929.2 3165.0,1580.5 3062.0,1505.2 3704.8,725.4 3859.1,0.0 6820.0,0.0 6820.0,999.3 5461.8,7.8 4326.6,2010.5 3997.8,2351.3 5611.2,3844.5 6074.8,4479.1 6246.1,5154.4 6820.0,5070.7 6820.0,7916.0 -0.0,7916.0 -0.0,6076.5 748.7,5957.1 1139.9,4622.0 482.7,892.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08723571078124,42.77513243355742]}},{"type":"Feature","properties":{"resourceCoords":[6820.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08329676241864,42.77589685855059]}},{"type":"Feature","properties":{"resourceCoords":[6820.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08209648175605,42.77251718169262]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08603543011866,42.77175275669945]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p11 [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":"6812.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011/info.json","type":"ImageService2","height":7916,"width":6812},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"731.8,6777.6 1090.7,7916.0 3108.7,6938.6 6133.0,6702.4 6202.2,4379.4 6498.0,2918.0 4387.6,2931.6 4338.0,0.0 -0.0,-0.0 -0.0,1349.1 279.4,1353.7 393.5,4721.8 731.8,6777.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3384.0,6900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091629,42.773388]}},{"type":"Feature","properties":{"resourceCoords":[1692.0,1872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.094454,42.774469]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p12","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"26"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/info.json","type":"ImageService2","height":7916,"width":6796},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2046.4,7916.0 1974.8,5862.7 925.8,2869.1 551.5,603.4 5344.1,2.4 4640.5,1141.6 5465.9,1655.3 5015.8,2771.7 5664.9,3449.5 5827.2,4274.0 4475.7,4111.0 4111.6,5871.7 5627.1,6048.5 5398.3,7811.5 2046.4,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[924.0,2868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089576,42.775709]}},{"type":"Feature","properties":{"resourceCoords":[5628.0,6048.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0888394,42.7732575]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p13","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/info.json","type":"ImageService2","height":7916,"width":6812},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,7606.9 137.9,7643.3 587.3,5940.2 -0.0,3784.7 -0.0,2207.8 944.8,2462.4 1542.3,76.8 3096.4,185.1 2891.1,1276.6 5908.6,2517.4 5843.4,4031.8 5662.1,4768.9 5343.6,4537.6 3843.0,5312.9 4251.5,7916.0 844.3,7916.0 678.2,7626.5 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4160.0,3768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091559,42.778639]}},{"type":"Feature","properties":{"resourceCoords":[6292.0,6040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089996,42.777899]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p14","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1156.1,7090.4 511.2,7226.5 457.5,5056.8 1143.0,1041.9 3873.0,2452.5 4628.8,0.0 6372.0,0.0 6519.5,345.0 6564.4,3236.9 6133.6,3649.9 5976.1,5298.4 3775.7,5869.1 1156.1,7090.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4884.0,4012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089816,42.7766586]}},{"type":"Feature","properties":{"resourceCoords":[472.0,4620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0915871,42.7751534]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"615.9,6301.2 782.7,5210.2 -0.0,5245.0 -0.0,-0.0 6760.0,0.0 6760.0,5819.4 3689.4,6011.7 3701.9,6118.2 3675.8,7436.9 615.9,6301.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09380091947018,42.78222401646998]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08985601620128,42.78284847537466]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0888666922668,42.77943403223628]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09281159553571,42.77880957333161]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/info.json","type":"ImageService2","height":7916,"width":6800},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6322.1,0.0 6289.9,6972.2 3299.5,6676.9 2023.3,6351.6 646.3,3734.4 836.0,2999.5 998.0,0.0 6322.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09147554113743,42.77988395212105]}},{"type":"Feature","properties":{"resourceCoords":[6800.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08757423723723,42.78063939146395]}},{"type":"Feature","properties":{"resourceCoords":[6800.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08638448580255,42.77728242587628]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09028578970275,42.776526986533376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/info.json","type":"ImageService2","height":7916,"width":6776},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"587.7,7489.6 50.9,7237.6 0.0,7352.2 0.0,5353.2 901.9,5143.7 3457.9,1056.9 4699.6,0.0 5328.2,0.0 5431.0,1282.2 6673.6,6902.2 1228.7,7571.5 587.7,7489.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08958508417025,42.775048318586926]}},{"type":"Feature","properties":{"resourceCoords":[6776.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0892909464009,42.77805744684803]}},{"type":"Feature","properties":{"resourceCoords":[6776.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08453521004452,42.77780344405052]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08482934781388,42.774794315789414]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/info.json","type":"ImageService2","height":7916,"width":6724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"532.4,675.5 1863.8,492.3 6055.8,539.6 5932.6,1215.4 5938.4,5894.3 4283.4,5587.2 3952.3,4653.8 1186.8,5634.8 532.4,675.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08543414539105,42.77811022688621]}},{"type":"Feature","properties":{"resourceCoords":[6724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08139698959204,42.77785858243088]}},{"type":"Feature","properties":{"resourceCoords":[6724.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08179777197321,42.7743453214227]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08583492777223,42.77459696587803]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/info.json","type":"ImageService2","height":7916,"width":6696},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2801.0,7916.0 2885.7,5524.3 2311.9,5587.4 1919.2,4501.3 167.6,2726.5 513.4,2392.6 1713.2,440.5 4461.7,2372.2 6088.3,2613.6 6021.4,5518.9 5784.5,5521.3 6136.9,7916.0 2801.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08514038084417,42.77570956084813]}},{"type":"Feature","properties":{"resourceCoords":[6696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08129333753735,42.7765648276514]}},{"type":"Feature","properties":{"resourceCoords":[6696.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07992553766925,42.77320291199024]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08377258097607,42.77234764518697]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p2","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/info.json","type":"ImageService2","height":7916,"width":6812},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6422.4,4224.4 6492.4,7713.1 6812.0,7687.1 6812.0,7916.0 -0.0,7916.0 -0.0,4704.9 1953.9,4686.9 -0.0,4072.9 24.5,-0.0 6083.2,0.0 5959.6,677.1 6422.4,4224.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4336.0,5492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.097093,42.764854]}},{"type":"Feature","properties":{"resourceCoords":[2984.0,280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.099469,42.766462]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/info.json","type":"ImageService2","height":7916,"width":6676},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3835.4,166.2 6676.0,917.5 6676.0,7916.0 3695.2,7916.0 3727.6,7679.0 836.0,7185.3 915.0,2280.6 576.5,2259.3 870.2,854.0 -0.0,435.6 -0.0,0.0 2230.5,-0.0 3835.4,166.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07753478946417,42.777049388996005]}},{"type":"Feature","properties":{"resourceCoords":[6676.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07585098493549,42.774393512667274]}},{"type":"Feature","properties":{"resourceCoords":[6676.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0801112036471,42.77291764798221]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08179500817579,42.77557352431094]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p21","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/info.json","type":"ImageService2","height":7916,"width":6720},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1721.5,5374.0 289.8,1759.0 -0.0,1890.3 -0.0,1372.8 725.7,1363.2 661.6,916.3 2626.6,385.7 6303.5,350.0 5606.8,2808.8 6720.0,3071.6 6720.0,3578.3 4305.2,3115.4 4250.2,3406.0 6720.0,3859.7 6720.0,5117.5 6439.6,6610.3 6720.0,6661.5 6720.0,7916.0 2139.8,7916.0 1873.4,6297.4 1854.5,6298.3 1721.5,5374.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1856.0,6300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07657,42.775093]}},{"type":"Feature","properties":{"resourceCoords":[6304.0,352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0739981,42.7777]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/info.json","type":"ImageService2","height":7916,"width":6788},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2680.3,3543.5 -0.0,3564.0 -0.0,3272.9 2435.5,3272.8 2358.1,2781.5 1372.4,2854.5 1210.2,2735.3 1435.3,229.8 505.5,387.6 530.0,0.0 4887.1,0.0 4800.6,429.5 5899.8,566.2 5733.0,2832.9 6788.0,3056.2 6788.0,4875.4 6609.7,6220.2 6788.0,6221.8 6788.0,7916.0 3234.7,7465.2 3003.5,6252.6 2721.2,6255.2 2680.3,3543.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07481697859754,42.7779084443286]}},{"type":"Feature","properties":{"resourceCoords":[6788.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07083284112238,42.777394179931754]}},{"type":"Feature","properties":{"resourceCoords":[6788.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07164416067891,42.773959733606794]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07562829815407,42.77447399800364]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p23","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2307.4,6128.5 2185.8,2954.1 1118.4,2827.7 1070.0,550.0 -0.0,527.0 20.1,0.0 3614.1,0.0 3324.1,537.3 5292.6,724.8 5655.7,7916.0 2644.2,7804.8 2484.4,6113.8 2307.4,6128.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3560.0,552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0699748,42.7769284]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0714122,42.7772158]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p24","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/info.json","type":"ImageService2","height":7916,"width":6788},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,219.3 3606.2,829.2 3294.1,1305.1 4073.0,1435.2 4595.0,0.0 6788.0,0.0 6788.0,7916.0 -0.0,7916.0 -0.0,219.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4000.0,7368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.067557,42.77316]}},{"type":"Feature","properties":{"resourceCoords":[392.0,276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.068777,42.776592]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5123.3,7371.7 1355.5,6893.0 1305.5,840.1 4352.3,1074.3 5552.3,1006.6 5542.9,2655.9 5123.3,7371.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08861036631097,42.7804520350901]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08467479271081,42.781176251106906]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08352541645995,42.77776372982783]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08746099006011,42.777039513811026]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6605.7,3903.8 5559.7,7546.5 1050.9,6824.1 484.4,891.0 5494.8,886.3 5771.1,4059.4 6605.7,3903.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08546595503995,42.78080785028899]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08141151742196,42.781017518726415]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08108033062696,42.77751852750998]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08513476824496,42.777308859072555]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p27","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5378.3,1070.7 6587.8,1352.0 6019.5,1373.6 5240.4,5884.0 6732.0,6098.8 6630.7,7916.0 3645.5,7916.0 3307.4,6555.9 2998.6,6680.3 1019.8,2435.1 741.1,1636.2 730.0,733.1 5378.3,1070.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3424.0,2976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080785,42.776467]}},{"type":"Feature","properties":{"resourceCoords":[5240.0,5884.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079003,42.777266]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,6588.5 1495.3,6645.7 1667.3,4810.2 176.1,4535.4 1133.4,0.0 1705.5,0.0 4831.3,758.7 6161.5,4280.9 6780.0,7313.4 0.0,7395.2 0.0,6588.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08172607454811,42.77713058260241]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0818416727478,42.78014283830737]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07708362658164,42.78024260060384]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07696802838196,42.77723034489888]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p29","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4984.9,7314.0 1863.1,7413.6 380.7,7775.4 428.9,1718.0 6715.2,0.0 5916.6,4000.3 4984.9,7314.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4624.0,2904.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074882,42.779646]}},{"type":"Feature","properties":{"resourceCoords":[364.0,6776.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.077357,42.777859]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p3","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/info.json","type":"ImageService2","height":7916,"width":6816},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6816.0,7916.0 -0.0,7916.0 -0.0,6133.8 196.9,4281.7 37.9,1018.3 317.0,200.6 511.0,0.0 6395.8,0.0 5709.6,3904.5 6816.0,3850.2 6816.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1528.0,2304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096633,42.766972]}},{"type":"Feature","properties":{"resourceCoords":[220.0,4064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.096614,42.765984]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p30","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1244.8,7385.7 1473.7,4328.6 1464.2,236.4 1239.1,281.9 1464.0,166.0 4567.7,132.3 5994.0,2909.8 6255.5,4199.1 5564.4,7448.0 1244.8,7385.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2140.0,7628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0739981,42.7777]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.073686,42.780998]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p31 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6756.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.2,7105.4 4855.1,7699.3 6040.6,3204.9 6110.2,269.3 6234.3,0.0 891.8,0.0 2217.1,3215.5 2276.3,4061.9 1419.2,7105.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4320.0,3184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.069922,42.779214]}},{"type":"Feature","properties":{"resourceCoords":[4320.0,80.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.069741,42.780612]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p32 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6784.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6523.6,7916.0 6784.0,6621.4 6784.0,1681.6 4161.6,1682.0 4160.8,0.0 2194.2,0.0 2243.8,306.2 -0.0,662.6 382.1,2087.7 518.0,7095.1 291.6,7421.7 5957.3,7389.7 5725.4,7916.0 6523.6,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2660.0,7376.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.068777,42.776592]}},{"type":"Feature","properties":{"resourceCoords":[2092.0,1688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.067825,42.779013]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p32 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4160.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2623.2"},{"label":"split_canvas_h","value":"1682.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6784.0,-0.0 4426.8,-0.0 4372.7,170.6 4518.2,1681.9 6784.0,1681.6 6784.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0032__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[4160.8,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06875538705718,42.780545189709564]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06720695675521,42.780286867979754]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,1682.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06743070383217,42.779554066844454]}},{"type":"Feature","properties":{"resourceCoords":[4160.8,1682.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06897913413414,42.779812388574264]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p33","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1378.2,1733.8 3015.2,1607.7 4105.8,1311.9 5908.6,1629.3 5639.7,3545.7 5810.4,5864.2 1338.8,6788.0 1378.2,1733.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1952.0,7264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08143,42.779027]}},{"type":"Feature","properties":{"resourceCoords":[3864.0,1364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080868,42.781759]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p34 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4814.8"},{"label":"split_canvas_w","value":"6796.0"},{"label":"split_canvas_h","value":"3101.2"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034/info.json","type":"ImageService2","height":7916,"width":6796},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,6946.2 719.1,6904.2 697.4,7916.0 6796.0,7916.0 6796.0,4864.0 0.0,4814.8 -0.0,6946.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2284.0,6888.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0642303,42.7715098]}},{"type":"Feature","properties":{"resourceCoords":[620.0,6888.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.06489,42.770948]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p34 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6796.0"},{"label":"split_canvas_h","value":"4864.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034/info.json","type":"ImageService2","height":7916,"width":6796},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1486.8,2360.7 2090.8,4615.6 5070.0,3835.7 5282.6,2371.0 5749.3,2313.0 5338.3,2110.2 5503.5,1236.2 5920.0,1477.6 6796.0,606.3 6796.0,0.0 5541.1,0.0 5560.1,335.1 1392.0,420.0 1486.8,2360.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0034__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3108.0,420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.07858,42.781772]}},{"type":"Feature","properties":{"resourceCoords":[1392.0,420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079617,42.781791]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"432.3,6101.4 901.6,6035.3 484.1,5839.4 636.1,4962.0 1059.7,5196.5 5782.9,350.1 5429.3,0.0 6544.9,0.0 6432.6,5590.3 266.8,7881.1 219.1,7274.5 432.3,6101.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07740196271199,42.78359346971372]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07336682128746,42.78346912178585]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07356464690054,42.77996210253899]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07759978832506,42.78008645046686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p36","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/info.json","type":"ImageService2","height":7916,"width":6736},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6736.0,7916.0 417.9,7444.3 428.0,1363.7 1221.6,454.7 2200.7,3443.1 3613.1,1884.9 3548.5,1685.6 4384.5,933.0 4684.4,1673.8 6736.0,4867.0 6736.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[428.0,1364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.073467,42.783676]}},{"type":"Feature","properties":{"resourceCoords":[3548.0,1684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.071606,42.783454]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p37","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/info.json","type":"ImageService2","height":7916,"width":6736},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.1,3567.1 2109.9,1225.4 6736.0,1087.0 6736.0,6193.7 1235.3,6263.5 1657.4,5828.3 756.8,4954.8 1267.3,4324.8 1611.1,3567.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4872.0,3180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.076003,42.783748]}},{"type":"Feature","properties":{"resourceCoords":[1744.0,3180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0773926,42.7828071]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p38","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"554.0,4761.4 694.6,217.1 1977.9,218.7 5887.0,229.7 6744.0,597.2 6744.0,5625.6 4561.4,7849.4 3460.7,7737.3 3358.2,7916.0 1289.9,7916.0 2820.9,5228.7 1634.3,5250.8 1297.4,5555.1 554.0,4761.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1556.0,2296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074767,42.784598]}},{"type":"Feature","properties":{"resourceCoords":[3252.0,5224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.072773,42.784193]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p39","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2524.7,0.0 6622.5,0.0 6623.0,0.0 6780.0,0.0 6780.0,3062.8 6377.3,3109.8 6122.4,4706.9 6253.6,7241.0 5051.4,7207.8 2034.8,6716.3 2524.7,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6136.0,4472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.085832,42.781753]}},{"type":"Feature","properties":{"resourceCoords":[3644.0,6968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086763,42.780355]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p4","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/info.json","type":"ImageService2","height":7916,"width":6816},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6816.0,4691.8 -0.0,6252.8 -0.0,1399.1 2919.0,271.5 3787.3,96.1 4754.8,192.3 5835.8,0.0 5704.1,382.6 6816.0,641.6 6816.0,4691.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3104.0,2188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.093468,42.769764]}},{"type":"Feature","properties":{"resourceCoords":[4648.0,2052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.092684,42.770131]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p40","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1284.5,5953.0 1085.8,2987.5 1293.2,1391.1 5726.1,790.0 5820.8,2570.0 5686.7,2586.7 4751.3,6799.9 1284.5,5953.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3508.0,6472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.083768,42.780508]}},{"type":"Feature","properties":{"resourceCoords":[2336.0,1264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.08539,42.782547]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p41","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"5"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2014.6,6672.3 702.5,6155.6 2242.9,2138.5 2377.6,2141.7 2545.4,372.7 5292.5,379.9 5070.2,5225.1 4184.8,5213.3 2574.6,4861.9 2014.6,6672.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5136.0,3800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081211,42.78234]}},{"type":"Feature","properties":{"resourceCoords":[2016.0,6672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.082143,42.780586]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p42","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"692.7,363.4 6004.9,380.6 6056.8,0.0 6598.1,5643.0 6459.3,6869.2 6015.2,7916.0 5741.4,7916.0 428.8,5184.7 692.7,363.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3644.0,2340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079894,42.783535]}},{"type":"Feature","properties":{"resourceCoords":[2988.0,4536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079655,42.782528]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6202.1,7061.3 174.8,7077.9 1331.0,1551.9 6157.9,1346.2 6202.1,7061.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08102068555759,42.78572919914325]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07816273572472,42.78777240630484]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07490230829566,42.785281254801646]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07776025812854,42.783238047640054]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1560.1,507.7 5099.7,370.7 5144.0,0.0 6664.0,0.0 6664.0,7916.0 5721.5,7916.0 5709.4,7916.0 4926.7,7916.0 4925.6,7541.5 4038.9,7124.2 -0.0,7097.8 -0.0,573.9 563.1,549.0 560.2,912.1 1560.3,878.1 1560.1,507.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07840385217987,42.787601132635814]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07560124893735,42.789635860420525]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07233086562988,42.787175431220575]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07513346887241,42.785140703435864]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/info.json","type":"ImageService2","height":7916,"width":6704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1242.6,270.3 5716.7,395.6 5718.2,7221.7 789.0,6811.9 1242.6,270.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08329347791023,42.78610302296859]}},{"type":"Feature","properties":{"resourceCoords":[6704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08156583201685,42.78341322476927]}},{"type":"Feature","properties":{"resourceCoords":[6704.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.085863069418,42.781905477177254]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08759071531138,42.784595275376574]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p46","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/info.json","type":"ImageService2","height":7916,"width":6672},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1021.5,527.3 5792.9,546.3 5980.6,7354.7 607.1,7296.1 1021.5,527.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3616.0,7328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.080417,42.784324]}},{"type":"Feature","properties":{"resourceCoords":[4220.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.081946,42.7871095]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/info.json","type":"ImageService2","height":7916,"width":6724},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2868.0,258.7 6724.0,477.0 6635.6,7493.0 5632.2,7492.1 5614.1,7916.0 186.5,7916.0 2253.2,1677.4 2868.0,258.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08326522984679,42.78795509522539]}},{"type":"Feature","properties":{"resourceCoords":[6724.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08054374713613,42.790073788876896]}},{"type":"Feature","properties":{"resourceCoords":[6724.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07716876767518,42.78770591387716]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07989025038583,42.78558722022566]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"953.7,459.7 4099.0,752.8 3647.5,0.0 6712.0,0.0 6712.0,7549.8 5887.3,7360.4 5912.8,6695.0 4412.8,6637.5 4355.0,7001.7 856.8,7003.0 953.7,459.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08093059454679,42.789764085748544]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07818192265957,42.79191859686322]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07474365563972,42.78952285670121]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07749232752694,42.787368345586536]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 5706.4,0.0 6302.4,2984.0 6416.7,6592.3 2287.2,6750.4 2251.3,7916.0 262.3,7916.0 351.9,6778.3 -0.0,6750.5 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09120960906183,42.78566363065363]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08737865085152,42.78650727332925]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08603244082823,42.7831679320152]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08986339903855,42.782324289339584]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p50","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/info.json","type":"ImageService2","height":7916,"width":6704},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"9.8,7391.7 185.8,5718.5 -0.0,3265.2 -0.0,-0.0 6678.3,0.0 6539.0,7692.4 9.8,7391.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[424.0,4180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.087355,42.785861]}},{"type":"Feature","properties":{"resourceCoords":[4008.0,7644.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.084525,42.785113]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/info.json","type":"ImageService2","height":7916,"width":6728},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"581.2,7370.0 927.9,1949.6 -0.0,1903.4 -0.0,-0.0 6728.0,0.0 5469.7,3597.0 5315.7,5081.2 5350.7,7392.0 581.2,7370.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08597134401877,42.78927095868593]}},{"type":"Feature","properties":{"resourceCoords":[6728.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08237249478837,42.79062047327715]}},{"type":"Feature","properties":{"resourceCoords":[6728.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0802240423988,42.787491116290525]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0838228916292,42.786141601699306]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/info.json","type":"ImageService2","height":7916,"width":6628},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"457.1,7916.0 468.1,5873.8 487.5,5932.4 447.6,4754.0 288.5,3968.2 400.5,3247.6 544.1,0.0 6628.0,0.0 6628.0,7854.1 6488.0,7916.0 4161.3,4944.7 2954.2,5890.1 3364.3,6047.4 571.2,7916.0 457.1,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0839753483003,42.795679222884985]}},{"type":"Feature","properties":{"resourceCoords":[6628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07615649817326,42.7965552945034]}},{"type":"Feature","properties":{"resourceCoords":[6628.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07474063372557,42.78965436812274]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0825594838526,42.788778296504326]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/info.json","type":"ImageService2","height":7916,"width":6672},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 4461.8,0.0 4597.8,363.4 5479.2,0.0 6012.4,0.0 6488.6,111.7 6514.5,0.0 6672.0,25.4 6672.0,243.5 6467.4,208.1 5765.0,3414.2 5529.5,4111.8 5552.5,4920.9 5389.2,6100.1 5380.0,6038.5 2002.2,6541.1 2144.3,7496.8 -0.0,7707.5 -0.0,6371.3 77.2,6148.9 -0.0,6114.8 -0.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09066119700097,42.794136829981085]}},{"type":"Feature","properties":{"resourceCoords":[6672.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08318158481147,42.79598008097743]}},{"type":"Feature","properties":{"resourceCoords":[6672.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08022230081797,42.78942200552916]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08770191300746,42.78757875453282]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p54 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3212.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054/info.json","type":"ImageService2","height":7916,"width":6672},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 -0.0,7184.9 2188.6,7916.0 2860.7,7591.6 2889.6,2520.8 3212.0,2477.2 3211.2,0.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1060.0,3284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0964399,42.8010581]}},{"type":"Feature","properties":{"resourceCoords":[328.0,3284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0969973,42.8005631]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p54 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"2858.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3813.2"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054/info.json","type":"ImageService2","height":7916,"width":6672},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6047.3,7172.3 6411.7,5012.9 6672.0,2375.0 6357.4,800.2 3874.2,0.0 3211.2,0.0 3212.0,2477.2 2889.6,2520.8 2874.0,5245.4 6047.3,7172.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0054__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4309.7,3044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0908381,42.7965575]}},{"type":"Feature","properties":{"resourceCoords":[5972.5,7544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.085371,42.795106]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p55","metadata":[{"label":"streets","value":"19"},{"label":"intersections","value":"26"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/info.json","type":"ImageService2","height":7916,"width":6668},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,3504.1 -0.0,1779.0 867.2,1829.6 987.5,923.6 -0.0,531.8 -0.0,0.0 6668.0,0.0 6668.0,7766.6 5460.7,7287.8 5402.8,7295.2 5564.0,7916.0 -0.0,7916.0 -0.0,6618.5 227.0,6650.2 315.9,5981.2 184.9,3454.1 -0.0,3504.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4168.0,3980.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0522247,42.7667725]}},{"type":"Feature","properties":{"resourceCoords":[1700.0,5920.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0559868,42.7663675]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/info.json","type":"ImageService2","height":7916,"width":6712},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6243.6,1021.1 6712.0,1324.5 6712.0,7904.0 0.0,7916.0 0.0,-0.0 3664.0,0.0 2869.3,1148.4 6306.1,2045.1 6243.6,1021.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05405966818836,42.760619941117525]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05197977133328,42.76620162204732]}},{"type":"Feature","properties":{"resourceCoords":[6712.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04307616978004,42.764387991742424]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04515606663512,42.75880631081263]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6238.8,7916.0 -0.0,7916.0 -0.0,1301.4 709.5,757.4 128.8,0.0 5340.5,0.0 6044.4,2594.5 6272.0,2596.0 6238.8,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4576.0,6288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089612,42.76394]}},{"type":"Feature","properties":{"resourceCoords":[6272.0,2596.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.088578,42.7655885]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6336.9,2460.2 5454.9,2351.4 5792.1,4330.1 6732.0,4437.1 6732.0,7272.8 6732.0,7273.5 6732.0,7916.0 3343.7,7916.0 3310.0,7815.3 3127.4,7867.1 0.0,2779.9 0.0,-0.0 1225.1,0.0 1215.1,102.5 6529.8,658.3 6336.9,2460.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08859166452582,42.762669905407485]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08898386064213,42.76564962599982]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08424474955193,42.7659905874648]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08385255343562,42.76301086687246]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p5 [2]","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"22"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6772.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005/info.json","type":"ImageService2","height":7916,"width":6772},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1976.8,776.7 2132.2,1025.7 591.6,1446.4 185.7,-0.0 -0.0,0.0 0.0,6771.6 1670.0,6803.6 1636.4,7916.0 2240.1,7916.0 2655.5,7183.1 2854.4,7016.5 5040.5,7167.2 5108.6,6912.5 6094.4,7412.8 5800.0,4375.7 5560.1,4240.2 5139.2,1769.8 4869.4,1903.0 4202.5,131.2 2968.6,344.4 919.6,402.2 1061.6,546.1 1976.8,776.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3568.0,7048.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.102048,42.76797]}},{"type":"Feature","properties":{"resourceCoords":[2708.0,4284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0995856,42.769744]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/info.json","type":"ImageService2","height":7916,"width":6816},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1629.8,7510.7 629.7,7592.2 866.3,5124.3 1825.7,1184.7 1476.3,1378.5 748.2,2823.8 -0.0,3204.0 -0.0,0.0 5573.5,0.0 5839.9,3948.3 6560.0,6595.8 4316.8,7916.0 3064.0,7916.0 1629.8,7510.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09773503929839,42.772526889932465]}},{"type":"Feature","properties":{"resourceCoords":[6816.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09473523193392,42.77457487390979]}},{"type":"Feature","properties":{"resourceCoords":[6816.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09151773496203,42.77199941762753]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09451754232649,42.769951433650206]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1696.5,7916.0 1949.8,7071.6 -0.0,6521.0 -0.0,-0.0 5889.6,0.0 5929.5,423.3 6752.0,399.8 6722.5,7487.3 3948.8,7014.7 3687.5,7916.0 1696.5,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08975521088188,42.76840995089575]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08580471952794,42.76920506415046]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08454381776204,42.76578097108737]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08849430911597,42.76498585783266]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2038.9,4588.1 1411.0,4480.1 1447.7,172.7 1727.9,48.3 5930.8,64.1 5984.0,6030.7 2016.1,7815.9 1469.3,7900.0 2038.9,4588.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08617248189863,42.76773323293426]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08223460899995,42.76853060437717]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08096638247338,42.7651072733531]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08490425537205,42.764309901910195]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1490.3,1966.2 2967.8,2110.5 2990.6,0.0 3310.7,0.0 5971.7,2347.7 5087.4,3343.3 4743.4,7831.9 1054.1,7916.0 1490.3,1966.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08395059323132,42.769007614679985]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08008435689001,42.77004905289921]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07844059784429,42.76671383934485]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0823068341856,42.76567240112563]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/info.json","type":"ImageService2","height":7916,"width":6740},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"826.1,4330.7 -0.0,4268.5 0.0,0.0 6740.0,0.0 6740.0,213.4 6268.8,214.0 6274.4,4667.6 6740.0,4713.7 6557.5,7578.9 857.0,7010.8 564.3,7109.5 826.1,4330.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08712372112097,42.77070347671659]}},{"type":"Feature","properties":{"resourceCoords":[6740.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08332535847721,42.771760139171874]}},{"type":"Feature","properties":{"resourceCoords":[6740.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08164663734186,42.76846217508277]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08544499998563,42.767405512627484]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 6784.0,0.0 6784.0,2848.7 6108.8,7916.0 3547.2,7916.0 655.5,5298.0 360.2,5294.5 470.4,4547.1 -0.0,4500.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08354549686048,42.77159711643729]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07976345674567,42.772653199103594]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07809651311567,42.769390755415316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08187855323048,42.76833467274901]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5819.2,2189.2 6408.9,4111.5 6554.7,5849.1 6732.0,5831.5 6572.6,6194.0 6715.4,7916.0 6663.1,7786.7 0.0,7702.8 0.0,969.1 3519.3,736.5 4913.9,454.1 5819.2,2189.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08239482985611,42.763125314455735]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08309357828428,42.76606455576324]}},{"type":"Feature","properties":{"resourceCoords":[6732.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0784188027685,42.766672017156864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07772005434033,42.763732775849356]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.6,694.2 2559.6,0.0 5306.0,0.0 6760.0,2298.1 6760.0,4273.0 5670.5,4901.7 4941.0,5532.0 3275.1,7916.0 -0.0,7916.0 -0.0,7277.6 158.2,7334.6 133.6,694.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07863428892445,42.76693031268485]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07458094565199,42.76740671140239]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07382637994316,42.763897535946036]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07787972321562,42.7634211372285]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p67","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5921.9,5733.5 4434.5,6935.9 2466.9,7916.0 2083.2,7916.0 65.8,3887.1 312.4,2707.2 590.8,2760.5 2715.9,1407.0 2350.4,639.2 3980.2,0.0 5271.0,0.0 6732.0,241.6 6732.0,5426.3 5921.9,5733.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3616.0,3340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0781764,42.768362]}},{"type":"Feature","properties":{"resourceCoords":[2156.0,8060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.079621,42.766436]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/info.json","type":"ImageService2","height":7916,"width":6832},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5369.4,7916.0 3311.2,6935.3 1297.8,6979.8 895.4,2766.4 247.8,6.0 6493.5,0.0 6753.1,6150.5 5733.1,7916.0 5369.4,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07991103274176,42.77264151825806]}},{"type":"Feature","properties":{"resourceCoords":[6832.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07585524108374,42.77303574194369]}},{"type":"Feature","properties":{"resourceCoords":[6832.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07523735592017,42.76956176893389]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07929314757818,42.769167545248266]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1139.4,656.8 4479.9,695.3 4368.6,3353.0 6019.5,3287.8 4730.8,7779.7 3655.2,7346.0 2766.6,7916.0 1945.1,7916.0 963.4,3255.0 675.7,3268.6 987.7,3080.2 989.3,1391.4 826.5,775.2 1139.4,656.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07569267768734,42.770916725823454]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07200469341802,42.769723117280876]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07389758604302,42.766526639403985]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07758557031234,42.76772024794656]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p7","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"25"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/info.json","type":"ImageService2","height":7916,"width":6820},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"270.3,3843.2 4169.6,1352.8 5724.1,1079.0 6193.1,4388.1 6144.2,7231.2 -0.0,4334.2 157.2,3967.9 -0.0,3847.3 270.3,3843.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6188.0,4388.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.089673,42.77276]}},{"type":"Feature","properties":{"resourceCoords":[1988.0,5292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091259,42.77125]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/info.json","type":"ImageService2","height":7916,"width":6840},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2362.7,2706.0 715.4,2842.2 712.3,181.0 6094.8,378.8 6129.5,0.0 6840.0,0.0 6840.0,6912.0 5781.3,6837.0 5187.0,7916.0 2709.2,7916.0 1267.9,7251.1 2362.7,2706.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07374572147693,42.77005374077945]}},{"type":"Feature","properties":{"resourceCoords":[6840.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07008513488543,42.768727471993074]}},{"type":"Feature","properties":{"resourceCoords":[6840.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0721613172834,42.7655955127912]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0758219038749,42.76692178157758]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p71","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/info.json","type":"ImageService2","height":7916,"width":6764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"514.0,5979.2 441.3,122.7 -0.0,-0.0 6764.0,0.0 6764.0,3493.2 3570.7,7893.8 514.0,5979.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2264.0,7000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.074282,42.77014]}},{"type":"Feature","properties":{"resourceCoords":[2572.0,3892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0744071,42.7715226]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/info.json","type":"ImageService2","height":7916,"width":6848},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1508.3,7711.3 1054.7,2280.4 -0.0,1064.5 -0.0,0.0 6848.0,0.0 6848.0,7419.0 1508.3,7711.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07177708295784,42.773114586803196]}},{"type":"Feature","properties":{"resourceCoords":[6848.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06826651050808,42.77153368112413]}},{"type":"Feature","properties":{"resourceCoords":[6848.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07073853790544,42.768533726486154]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0742491103552,42.77011463216522]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/info.json","type":"ImageService2","height":7916,"width":6816},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6816.0,-0.0 6816.0,7916.0 6147.1,7916.0 6162.6,7438.1 5551.8,7432.4 3110.0,7546.3 2645.5,7906.9 1079.8,7739.1 1050.1,7916.0 -0.0,7916.0 0.0,-0.0 6816.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02745227931489,42.765430152701235]}},{"type":"Feature","properties":{"resourceCoords":[6816.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.02551032286065,42.76275431416444]}},{"type":"Feature","properties":{"resourceCoords":[6816.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0297136054698,42.76108682428049]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03165556192403,42.763762662817285]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p75","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4233.7 -0.0,2538.9 315.9,2387.8 -0.0,1843.8 -0.0,-0.0 6752.0,0.0 6752.0,585.0 5698.4,584.9 5691.9,1648.7 5871.7,1688.1 5680.7,3122.7 5809.9,3589.3 6055.3,3762.2 6146.5,6880.8 5660.2,6876.5 5656.1,7548.3 6752.0,7548.4 6752.0,7916.0 1443.4,7916.0 1205.2,7661.2 1260.0,4174.0 -0.0,4233.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1260.0,4176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.032959,42.761469]}},{"type":"Feature","properties":{"resourceCoords":[6132.0,5480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.030049,42.761978]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/info.json","type":"ImageService2","height":7916,"width":6800},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2564.3,0.0 5438.1,1437.7 5944.9,1392.6 6640.5,0.0 6800.0,0.0 6800.0,7916.0 -0.0,7916.0 0.0,-0.0 614.2,0.0 608.2,341.8 2091.3,1071.4 2564.3,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0076/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03425880360938,42.76211614331559]}},{"type":"Feature","properties":{"resourceCoords":[6800.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0308995419214,42.760361763298924]}},{"type":"Feature","properties":{"resourceCoords":[6800.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03366169608675,42.75747032892292]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.03702095777473,42.759224708939584]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p78 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6872.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078/info.json","type":"ImageService2","height":7916,"width":6872},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6872.0,0.0 -0.0,-0.0 -0.0,7916.0 3934.8,7916.0 3880.0,4038.8 6872.0,4023.6 6872.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0078__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04484287114593,42.74182225738574]}},{"type":"Feature","properties":{"resourceCoords":[6872.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04090902851512,42.7408640263609]}},{"type":"Feature","properties":{"resourceCoords":[6872.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04240960737086,42.73753073207959]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.04634345000167,42.73848896310443]}},{"type":"Feature","properties":{"resourceCoords":[1684.0,2364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.044327,42.740592]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p79 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3740.4"},{"label":"split_canvas_w","value":"6752.0"},{"label":"split_canvas_h","value":"4175.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4716.0,7916.0 5624.0,7916.0 6752.0,7916.0 6752.0,3740.4 4388.8,3744.0 4388.8,5519.6 0.0,6063.6 -0.0,7916.0 4716.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5472.0,5648.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0360645,42.7653746]}},{"type":"Feature","properties":{"resourceCoords":[2588.0,9963.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.041242,42.763124]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p79 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6752.0"},{"label":"split_canvas_h","value":"6063.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1618.0,1496.9 1039.5,5396.7 4388.8,5050.4 4388.8,3744.0 6752.0,3740.4 6752.0,3491.8 6190.9,3450.5 6445.0,0.0 0.0,-0.0 -0.0,1256.9 1618.0,1496.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0079__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3508.0,2967.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.045718,42.766914]}},{"type":"Feature","properties":{"resourceCoords":[-44.0,5979.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.051033,42.765579]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p8","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/info.json","type":"ImageService2","height":7916,"width":6828},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1655.7,895.5 6828.0,2091.6 6828.0,3836.1 5881.9,4034.7 5829.6,4921.2 6828.0,4980.1 6828.0,7916.0 -0.0,7916.0 -0.0,5286.1 1622.7,4928.4 1655.7,895.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1112.0,2664.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091709,42.770319]}},{"type":"Feature","properties":{"resourceCoords":[2760.0,1156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.091259,42.77125]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p80 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"3238.4"},{"label":"split_canvas_y","value":"4390.4"},{"label":"split_canvas_w","value":"3585.6"},{"label":"split_canvas_h","value":"3525.6"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080/info.json","type":"ImageService2","height":7916,"width":6824},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6824.0,4390.4 4171.6,4401.2 3243.2,5203.2 3238.4,7916.0 6824.0,7916.0 6824.0,4390.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0080__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3238.4,4390.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10086116652474,42.75930282630164]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,4390.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09870327601081,42.75941856111409]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0985485703824,42.75785778867295]}},{"type":"Feature","properties":{"resourceCoords":[3238.4,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.10070646089633,42.757742053860504]}},{"type":"Feature","properties":{"resourceCoords":[5101.2,6636.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0996424,42.7583684]}},{"type":"Feature","properties":{"resourceCoords":[5101.2,6636.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0991665,42.7584134]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/info.json","type":"ImageService2","height":7916,"width":6824},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1345.5,7916.0 1535.4,3127.5 1270.3,2173.8 5746.3,0.0 6258.4,0.0 6405.7,1176.8 6382.0,7916.0 1345.5,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08621969666292,42.76454505716703]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08225069932418,42.765268809387685]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08111514247825,42.76186476376674]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.085084139817,42.76114101154608]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3739.4,0.0 6784.0,0.0 6784.0,6773.6 6276.6,6841.1 6014.9,7916.0 5063.3,7916.0 4990.5,7012.4 3211.6,7249.3 3289.7,7433.6 702.7,7916.0 0.0,7916.0 -0.0,-0.0 563.7,0.0 525.1,527.7 3702.6,713.9 3739.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0085/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06524232355318,42.77059446333706]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06044505137177,42.77519833608471]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05317815523392,42.77106016339518]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.05797542741533,42.766456290647525]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/info.json","type":"ImageService2","height":7916,"width":6824},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 6824.0,0.0 6824.0,1431.8 6344.8,1541.1 6824.0,3641.4 6824.0,4094.2 6539.2,4124.4 6554.6,5339.4 6070.2,5345.8 6244.8,6003.0 6824.0,7045.7 6824.0,7916.0 -0.0,7916.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1013912865248,42.783666372808796]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09320104263152,42.783585508973985]}},{"type":"Feature","properties":{"resourceCoords":[6824.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09332795137422,42.77656298612567]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.1015181952675,42.77664384996048]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/info.json","type":"ImageService2","height":7916,"width":6808},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2610.4 476.0,2648.8 2145.2,1829.8 2311.5,2306.9 2371.6,4752.3 4937.1,4587.3 4840.8,2952.1 6808.0,2959.2 6808.0,4771.7 6132.5,5567.2 6808.0,6140.9 6808.0,6591.7 6756.5,6668.7 6808.0,6701.3 6808.0,7916.0 -0.0,7916.0 -0.0,2610.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08802634534216,42.764978972186505]}},{"type":"Feature","properties":{"resourceCoords":[6808.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08016210509706,42.76602251027173]}},{"type":"Feature","properties":{"resourceCoords":[6808.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0785209934974,42.75926168926856]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0863852337425,42.758218151183335]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,4834.9 95.8,4952.3 1304.4,3966.8 1376.3,3996.4 1246.9,2862.4 1307.2,2121.3 1509.5,1510.9 2249.6,384.3 2395.1,0.0 6760.0,0.0 6760.0,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07495905127634,42.767307990021685]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06786281223467,42.764258904246105]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07269203522213,42.758115079788766]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.0797882742638,42.761164165564345]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/info.json","type":"ImageService2","height":7916,"width":6700},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1743.4,7511.9 1565.1,4896.8 771.9,3487.3 405.9,0.0 6700.0,0.0 6700.0,7916.0 3891.4,7916.0 3714.3,7693.3 3619.1,7852.1 2915.2,7441.6 1743.4,7511.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.09229197458099,42.799493094493464]}},{"type":"Feature","properties":{"resourceCoords":[6700.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08590774456489,42.80295956837852]}},{"type":"Feature","properties":{"resourceCoords":[6700.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08036509172983,42.797385904860555]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.08674932174593,42.7939194309755]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p9","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"17"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/info.json","type":"ImageService2","height":7916,"width":6820},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"839.3,5000.1 1264.5,5052.7 528.2,2264.7 2272.2,1811.5 1865.2,324.2 3653.1,0.0 4011.0,1328.4 4722.5,864.6 5112.5,0.0 6820.0,0.0 6820.0,3870.4 6585.7,4129.9 6201.5,5074.5 5441.3,5066.1 5121.3,6892.7 6820.0,7184.3 6820.0,7916.0 -0.0,7916.0 -0.0,7018.0 943.1,6761.2 839.3,5000.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2272.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0888394,42.7732575]}},{"type":"Feature","properties":{"resourceCoords":[5484.0,5064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.086291,42.772546]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Haverhill, Massachusetts | 1949 | sanborn03745_004 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T14:58:07Z","modified":"2026-09-21T14:58:07Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"786.0,3672.3 1628.6,3512.5 962.6,0.0 6760.0,0.0 6760.0,7916.0 230.9,7916.0 321.8,7370.0 1233.2,5992.3 786.0,3672.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764hm:g037451949:03745_1949-0090/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07627843374021,42.78895428828506]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06956650668519,42.79226908063848]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.06431433419512,42.78646032971047]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-71.07102626125014,42.78314553735706]}}]}}]}