{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03573_036.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1952 | 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":"89"},{"label":"placed","value":"71"},{"label":"unplaced","value":"18"},{"label":"fit sources","value":"georef 44, georef-snap 22, snap:0 4, snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 21 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 39.26811,-76.64813 +/-251m); p11__2 (tier 3, 39.28372,-76.64515 +/-565m); p15__3 (tier 1, 39.28512,-76.62810 +/-111m); p50 (tier 1, 39.27076,-76.61086 +/-278m); p53 (tier 2, 39.26693,-76.61723 +/-100m); p54__3 (tier 1, 39.25615,-76.63009 +/-100m); p56__2 (tier 1, 39.24827,-76.62974 +/-100m); p56__3 (tier 3, 39.24811,-76.62739 +/-565m); p65 (tier 2, 39.27206,-76.62932 +/-149m); p69 (tier 2, 39.27009,-76.64528 +/-700m); p74 (tier 1, 39.26804,-76.64202 +/-277m); p77 (tier 1, 39.26475,-76.63084 +/-292m); p85__2 (tier 2, 39.26693,-76.65773 +/-190m); p87__1 (tier 2, 39.26324,-76.64420 +/-144m); p92__2 (tier 2, 39.25765,-76.64616 +/-123m); p94 (tier 1, 39.26230,-76.63339 +/-263m); p95__2 (tier 1, 39.26307,-76.63408 +/-172m); p95__4 (tier 2, 39.26227,-76.63378 +/-240m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p10","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"35"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0010/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"709.7,4860.3 699.5,563.9 -0.0,570.9 -0.0,0.0 4352.0,0.0 4352.0,647.5 3844.2,653.5 3851.3,1925.4 4352.0,1933.8 4352.0,3367.1 3850.2,3375.4 3858.3,4799.4 709.7,4860.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1492.0,3420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6443787,39.2862697]}},{"type":"Feature","properties":{"resourceCoords":[1492.0,4852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6443224,39.2852731]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p11 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"707.6"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"4692.4"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0011__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0011/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3889.5,707.6 705.4,707.6 697.6,1999.1 1206.2,2013.5 1189.2,3468.6 679.3,3471.1 670.6,4916.9 3857.8,4901.9 3889.5,707.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3868.0,3465.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6394382,39.2864973]}},{"type":"Feature","properties":{"resourceCoords":[3868.0,2018.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6395092,39.2874885]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p12","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0012/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"685.7,4850.4 677.9,705.4 -0.0,711.8 -0.0,-0.0 3237.7,38.4 3243.1,527.9 3828.5,515.9 3817.0,4802.0 685.7,4850.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2260.0,3428.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6380241,39.2865496]}},{"type":"Feature","properties":{"resourceCoords":[2260.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6381431,39.2885526]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0013/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3914.1,4809.6 536.5,4819.4 596.0,489.5 -0.0,494.7 -0.0,-0.0 3968.7,0.0 3914.1,4809.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0013/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63728733916815,39.28893169228443]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63345662183029,39.28910300204622]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63318391100799,39.285398160895284]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63701462834585,39.285226851133494]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0014/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"423.8,4895.8 430.8,0.0 4352.0,0.0 4352.0,116.0 3460.7,225.9 3672.9,1912.2 4004.9,1910.0 4000.1,3506.3 3349.8,3508.3 3354.8,4863.3 423.8,4895.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63416704889627,39.28907613789993]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63039932982939,39.289215380456376]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63017766680962,39.28557147582582]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6339453858765,39.285432233269376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p15 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"3535.2"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1018.2,3535.2 3182.2,3471.7 3423.1,2076.4 4214.9,160.6 4352.0,176.9 4352.0,0.0 -0.0,0.0 -0.0,1762.3 339.5,1802.2 129.3,3444.4 1018.2,3535.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3660.0,3411.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6276361,39.2872514]}},{"type":"Feature","properties":{"resourceCoords":[2624.0,551.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6289055,39.2889703]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p15 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3535.2"},{"label":"split_canvas_w","value":"2160.0"},{"label":"split_canvas_h","value":"1864.8"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"620.0,4848.9 2140.1,4838.3 2150.8,4091.2 2160.0,3535.2 0.0,3535.2 0.0,5400.0 560.0,5400.0 616.3,5400.0 620.0,4848.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0015__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,3535.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6311230060718,39.286815925740065]}},{"type":"Feature","properties":{"resourceCoords":[2160.0,3535.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62918987800877,39.28689189880538]}},{"type":"Feature","properties":{"resourceCoords":[2160.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62910495679779,39.28559844674266]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63103808486082,39.28552247367735]}},{"type":"Feature","properties":{"resourceCoords":[620.0,4848.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6305083,39.2859265]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p16","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0016/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.9,1875.1 1962.1,0.0 4352.0,0.0 4352.0,5400.0 3683.5,5400.0 3704.0,4824.7 2167.3,4822.5 1993.8,4453.8 1340.7,4456.6 1473.8,4821.9 -0.0,4825.9 -0.0,3404.2 1367.5,3203.5 1436.9,1875.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2896.0,1484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6267372,39.2884058]}},{"type":"Feature","properties":{"resourceCoords":[3708.0,3936.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.625895,39.2867376]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0017/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0017/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"487.2,463.5 4072.3,406.9 4073.3,1785.4 4352.0,1785.6 4352.0,5013.1 1476.8,5011.8 1499.4,4647.0 1224.4,4633.9 24.6,5201.5 -0.0,938.6 486.1,937.4 487.2,463.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64720780661307,39.28546496949188]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64337893326885,39.28559948680012]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64316480363485,39.28189624439908]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64699367697906,39.28176172709084]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0018/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0018/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,232.9 4352.0,5400.0 -0.0,5400.0 -0.0,3042.6 -0.0,3042.6 -0.0,631.6 1185.3,0.0 1463.9,0.0 1458.7,369.7 4352.0,232.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64697846194838,39.28232709187161]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64319074043601,39.282319198444966]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64320330490114,39.278655587407336]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6469910264135,39.27866348083398]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0019/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0019/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"677.4,1711.1 678.0,349.7 3839.8,300.3 3848.5,4901.8 3125.9,4901.2 3120.9,5342.8 911.8,5400.0 952.6,1711.7 677.4,1711.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64422721670148,39.285532836530095]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64035060149119,39.28567264897982]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64012804266622,39.28192323437085]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64400465787651,39.281783421921126]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p20","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0020/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"723.7,4946.4 663.5,303.5 3848.5,222.9 3895.3,4580.2 4352.0,5262.7 4207.3,5400.0 -0.0,5400.0 -0.0,4953.1 723.7,4946.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2276.0,1720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.639316,39.2845126]}},{"type":"Feature","properties":{"resourceCoords":[3880.0,3324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6378391,39.2834455]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p21","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0021/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3051.2,4490.5 1990.8,5400.0 957.3,5400.0 471.5,4842.5 420.1,4432.6 584.0,300.0 3359.6,360.1 3162.7,4620.1 3051.2,4490.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[584.0,300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6379632,39.2855795]}},{"type":"Feature","properties":{"resourceCoords":[1896.0,6492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6363374,39.2814009]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0022/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2183.7,3405.0 415.7,5011.0 -0.0,4573.5 -0.0,285.0 4352.0,190.7 4352.0,1790.5 4023.7,1797.0 4048.3,4555.4 3302.3,4556.5 2183.7,3405.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6355026983965,39.28589314861198]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63167657500408,39.28600529883633]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63149804904363,39.28230473852531]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63532417243604,39.282192588300965]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p23","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0023/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0023/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"493.6,4891.6 492.0,2180.0 812.4,2176.1 825.3,603.6 1499.9,595.5 1502.7,1139.8 2115.2,1136.6 2116.0,588.0 3789.6,567.6 3783.1,4899.0 493.6,4891.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2116.0,588.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6305083,39.2859265]}},{"type":"Feature","properties":{"resourceCoords":[492.0,2180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6319058,39.2847654]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0024/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1208.8,5400.0 1251.0,4872.0 380.4,4877.9 434.6,375.5 1770.9,378.0 1633.7,0.0 2313.5,0.0 2492.8,381.7 4092.3,390.8 4073.3,571.9 4068.9,985.1 4352.0,986.3 4352.0,5400.0 1208.8,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62939345989274,39.28622901514295]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62565242663558,39.28639376644652]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62539016626998,39.28277552526281]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62913119952714,39.282610773959235]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0025/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"894.6,779.1 4352.0,535.7 4352.0,5400.0 3812.4,5400.0 3780.7,4897.7 689.8,2046.2 979.9,2038.1 894.6,779.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63193065759654,39.28345280634654]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62807031268147,39.28338232455521]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62818250505481,39.279648538286985]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63204284996988,39.27971902007831]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p31","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0031/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0031/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"908.5,5089.3 1008.8,166.2 3366.5,249.7 3351.7,1835.2 4352.0,2887.2 3514.1,3750.9 3315.4,3542.4 3281.5,5135.3 908.5,5089.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[960.0,2560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6334455,39.2813087]}},{"type":"Feature","properties":{"resourceCoords":[3300.0,4268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6308991,39.2816745]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p32","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0032/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0032/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2315.2,5400.0 1164.1,5381.6 1032.5,2904.1 1036.0,188.0 3394.5,177.8 3424.5,2757.0 3083.1,3122.5 3448.6,3509.5 4352.0,2655.7 4352.0,5400.0 2554.9,5400.0 2534.1,5299.6 2315.2,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3396.0,868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6299045,39.2809161]}},{"type":"Feature","properties":{"resourceCoords":[1036.0,188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.631833,39.2800818]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p39","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0039/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3809.8,5400.0 -0.0,5400.0 -0.0,3436.6 725.9,2667.3 725.2,2408.6 838.0,2409.5 1511.1,1622.7 1509.3,222.0 3798.0,216.2 3809.8,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2280.0,4580.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6376964,39.2803372]}},{"type":"Feature","properties":{"resourceCoords":[2280.0,220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6349716,39.2824699]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p40","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0040/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3967.5,4669.9 548.0,4660.0 548.0,308.0 3961.3,307.6 3967.5,4669.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[548.0,4660.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6367389,39.279591]}},{"type":"Feature","properties":{"resourceCoords":[548.0,308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6340095,39.2817378]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p41","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0041/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0041/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"689.6,501.6 3430.0,504.0 3445.2,4874.9 711.8,4877.0 689.6,501.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2076.0,4876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6337002,39.277265]}},{"type":"Feature","properties":{"resourceCoords":[3432.0,504.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6300988,39.27875]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p42","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0042/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0042/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"556.0,448.0 2953.0,328.2 3759.0,-0.0 4352.0,-0.0 4352.0,4806.4 556.0,4796.0 556.0,448.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[556.0,448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6300988,39.27875]}},{"type":"Feature","properties":{"resourceCoords":[556.0,4796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6328323,39.2766007]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0043/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2024.1,3632.1 812.7,3389.1 1252.9,1314.4 668.3,1195.0 -0.0,1319.4 157.7,236.7 104.9,0.0 3083.3,0.0 3077.3,642.7 3531.3,543.1 3681.5,1849.9 3292.0,4458.8 1904.0,4180.6 2024.1,3632.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62769525712524,39.278358880303315]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62444792698473,39.27672896439275]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62704220224194,39.27358783855374]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63028953238245,39.2752177544643]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0044/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"592.6,1740.7 448.0,578.9 -0.0,681.6 -0.0,0.0 716.4,0.0 716.4,0.0 4352.0,0.0 4352.0,4746.3 2034.9,4299.3 1937.1,4789.2 418.6,4489.5 492.6,4001.8 342.2,3972.8 567.7,2162.2 592.6,1740.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62537185152115,39.27723108612887]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62210762273959,39.27555860035523]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62476960814122,39.272401073166535]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62803383692278,39.274073558940174]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p45","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0045/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,0.0 4352.0,5400.0 3350.8,5400.0 3258.4,4893.9 2898.6,4869.9 2784.4,5400.0 0.0,5400.0 0.0,0.0 1398.3,0.0 3402.5,948.7 3859.7,0.0 4352.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3244.0,3268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6201167,39.2752395]}},{"type":"Feature","properties":{"resourceCoords":[2900.0,4868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6187696,39.2748614]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p48","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"26"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0048/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3846.8,3119.2 4352.0,3113.9 4352.0,5175.3 3849.0,5177.6 3853.9,5400.0 3211.4,5400.0 3248.3,5197.9 549.1,4705.5 344.6,5199.3 -0.0,5112.3 -0.0,0.0 3453.2,-0.0 3453.3,88.0 3835.3,86.3 3846.8,3119.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2300.0,1420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6153415,39.2736356]}},{"type":"Feature","properties":{"resourceCoords":[772.0,3244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6170191,39.274628]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p49","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0049/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,3501.5 175.3,2585.4 811.6,2590.9 808.6,2370.6 1306.8,2372.6 1319.4,913.2 4352.0,935.8 4352.0,5400.0 -0.0,5400.0 -0.0,3501.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6165290592693,39.27310532267138]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61632175469275,39.27009226465287]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62115396442854,39.26989325215325]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62136126900509,39.27290631017176]}},{"type":"Feature","properties":{"resourceCoords":[824.0,332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6167869,39.2725226]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0051/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3625.3,380.0 3624.0,0.0 4352.0,0.0 4352.0,5400.0 3662.7,5400.0 3659.4,4955.1 2399.1,4951.8 2392.6,4644.0 2296.7,4645.4 2300.5,4951.2 1380.7,4958.3 1378.7,4658.8 -0.0,4678.9 -0.0,887.4 589.3,888.5 584.6,385.8 3625.3,380.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6173195682932,39.272769965346804]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61347118362649,39.27290830592054]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61325100787768,39.269185517860976]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61709939254439,39.26904717728724]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0052/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0052/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2584.9,0.0 2586.9,310.4 3857.3,332.2 3854.1,780.6 4352.0,787.9 4352.0,4996.3 2495.8,5005.2 2491.2,5400.0 -0.0,5400.0 -0.0,-0.0 1562.6,0.0 1560.2,301.9 2487.5,308.3 2488.2,0.0 2584.9,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61728005925775,39.2695371802534]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61346565585444,39.26971770337515]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6131783575114,39.26602762082925]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61699276091471,39.2658470977075]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p54 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3138.9,748.8 1831.7,758.2 1826.9,0.0 0.0,-0.0 0.0,3371.2 1749.2,3370.8 1756.4,4031.2 1762.0,4208.8 2868.8,4318.4 2899.2,4318.4 2928.8,5400.0 3172.0,5400.0 4352.0,5400.0 4352.0,0.0 4110.7,0.0 4114.0,528.2 3140.0,540.0 3138.9,748.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2212.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6163769,39.2661557]}},{"type":"Feature","properties":{"resourceCoords":[3140.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6148263,39.2662204]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p54 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3370.8"},{"label":"split_canvas_w","value":"1769.2"},{"label":"split_canvas_h","value":"2029.2"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5400.0 1769.2,5400.0 1759.6,4317.6 1765.6,4317.6 1762.0,4208.8 1756.4,4031.2 1749.2,3370.8 954.7,3371.0 970.1,3622.9 680.5,3691.0 0.0,3615.1 -0.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0054__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,3370.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63315842833558,39.25814231683563]}},{"type":"Feature","properties":{"resourceCoords":[1769.2,3370.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63177843560159,39.25754015139506]}},{"type":"Feature","properties":{"resourceCoords":[1769.2,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63267295688519,39.25631303761196]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63405294961917,39.25691520305253]}},{"type":"Feature","properties":{"resourceCoords":[680.5,3690.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6327688,39.2577171]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p55","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0055/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0055/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 4352.0,-0.0 4352.0,5400.0 -0.0,5400.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[832.0,3520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6201134,39.2512125]}},{"type":"Feature","properties":{"resourceCoords":[832.0,2460.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6184353,39.2519317]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0056__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p56 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0056__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0056/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 -0.0,5400.0 2155.6,5400.0 2726.4,3766.8 2727.2,3764.4 3090.8,2851.6 4352.0,2813.2 4352.0,0.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0056__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2248.0,1736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6284772,39.248624]}},{"type":"Feature","properties":{"resourceCoords":[1520.0,4288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6268625,39.2454834]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p57","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0057/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"433.9,451.8 4352.0,471.5 4352.0,4380.2 3037.7,4377.4 3035.5,5400.0 -0.0,5400.0 -0.0,1253.4 431.3,1255.3 433.9,451.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2144.0,2620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6370022,39.2776977]}},{"type":"Feature","properties":{"resourceCoords":[2144.0,460.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6356551,39.2787618]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p58","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0058/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"540.0,4772.0 539.4,4539.6 -0.0,4533.7 0.0,-0.0 96.9,-0.0 106.2,1086.1 3125.3,1060.0 3149.6,4777.4 540.0,4772.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63948158070383,39.27794804077226]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63671909703285,39.27581821103529]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64013482415372,39.27316622529685]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6428973078247,39.27529605503381]}},{"type":"Feature","properties":{"resourceCoords":[540.0,4772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6421573,39.2753402]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p59","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0059/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0059/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3481.1,2654.6 4352.0,2658.8 4352.0,4313.4 1252.0,4381.8 1248.4,494.0 3483.9,503.1 3481.1,2654.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2124.0,2648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6350482,39.2761997]}},{"type":"Feature","properties":{"resourceCoords":[764.0,492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6345649,39.2779269]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p60","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0060/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"677.5,466.2 4352.0,419.8 4352.0,2565.2 710.5,2608.4 677.5,466.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2436.0,2588.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6330815,39.2746919]}},{"type":"Feature","properties":{"resourceCoords":[2436.0,444.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6317074,39.2757396]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p61","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0061/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0061/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 4352.0,-0.0 4352.0,4762.5 2788.0,4770.4 2788.0,5328.0 4352.0,5328.0 4352.0,5400.0 1150.1,5400.0 1154.3,4749.4 -0.0,4734.5 -0.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63752920388418,39.27640069561636]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63474877344649,39.27428489127075]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63814200726246,39.27161567662708]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64092243770016,39.273731480972685]}},{"type":"Feature","properties":{"resourceCoords":[3532.0,4780.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6382763,39.2723208]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p62","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0062/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1564.0,4834.5 1564.0,72.0 745.9,72.0 745.9,-0.0 4352.0,-0.0 4352.0,5400.0 -0.0,5400.0 -0.0,4842.4 1564.0,4834.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63570274751748,39.27508084798604]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63292231707979,39.27296504364043]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63631555089576,39.27029582899676]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63909598133345,39.272411633342365]}},{"type":"Feature","properties":{"resourceCoords":[744.0,4852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6382763,39.2723208]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p63","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0063/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3633.8,557.7 3616.7,4869.9 848.3,4849.9 889.0,2697.1 996.0,2697.8 1005.6,-0.0 2233.1,-0.0 2227.4,557.8 3633.8,557.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2232.0,4860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6309757,39.2730772]}},{"type":"Feature","properties":{"resourceCoords":[3012.0,2704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6291246,39.2737688]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p64","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0064/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3951.3,-0.0 4352.0,24.9 4352.0,5400.0 985.4,5400.0 970.3,2196.6 -0.0,2201.2 -0.0,454.1 3953.1,450.7 3951.3,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2484.0,452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6309757,39.2730772]}},{"type":"Feature","properties":{"resourceCoords":[4052.0,452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6300353,39.2723548]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p66","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0066/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3862.6,175.4 3856.0,1712.0 4352.0,1711.5 4352.0,5400.0 -0.0,5400.0 -0.0,-0.0 4352.0,0.0 4352.0,156.9 3862.6,175.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1716.0,1712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6276397,39.2726138]}},{"type":"Feature","properties":{"resourceCoords":[3856.0,1712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6262798,39.2736863]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0067/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3854.4,5400.0 -0.0,5400.0 -0.0,0.0 3877.1,-0.0 3854.4,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64438829528133,39.277328106829465]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64171942925789,39.27522512977836]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64506662716319,39.272643525563346]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64773549318663,39.27474650261445]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p68","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0068/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0068/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,4697.8 554.2,4720.2 580.8,5400.0 -0.0,5400.0 -0.0,5243.5 547.8,5249.5 588.0,208.0 4352.0,220.7 4352.0,4697.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64239897123292,39.27573011248396]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63963648756194,39.273600282747]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64305221468281,39.27094829700855]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64581469835379,39.27307812674552]}},{"type":"Feature","properties":{"resourceCoords":[588.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6421573,39.2753402]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0070/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4107.8,571.2 4115.1,-0.0 4352.0,-0.0 4352.0,4780.2 1686.8,4604.9 1841.3,559.6 4107.8,571.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65125858898857,39.26850623924354]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64828687734904,39.266420824522264]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65160572805573,39.26354593520059]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65457743969526,39.265631349921875]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p71","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0071/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0071/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.0,1105.1 1815.7,757.0 2116.4,0.0 3383.7,0.0 3802.2,136.7 3848.0,0.0 4352.0,0.0 4352.0,4030.3 4145.5,4032.7 4261.2,5111.6 4352.0,5111.4 4352.0,5400.0 2567.6,5400.0 0.0,5108.8 0.0,1539.0 1529.0,1105.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1632.0,3124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6386043,39.2616505]}},{"type":"Feature","properties":{"resourceCoords":[3696.0,4540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6347582,39.2633575]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p72","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0072/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"678.0,5400.0 498.6,-0.0 4352.0,-0.0 4352.0,5400.0 678.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64535127574192,39.27338335662531]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64257261172351,39.271266163660904]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64596807254514,39.268598644780646]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64874673656355,39.27071583774505]}},{"type":"Feature","properties":{"resourceCoords":[560.0,1484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6459268,39.2723778]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p73","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0073/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0073/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5188.8 1274.0,5234.2 1406.8,-0.0 4352.0,-0.0 4352.0,5400.0 3647.6,5400.0 3561.5,5323.4 3490.6,5400.0 -0.0,5400.0 -0.0,5188.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2316.0,2800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6438083,39.2693541]}},{"type":"Feature","properties":{"resourceCoords":[1352.0,3112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6446335,39.2696466]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p75","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0075/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0075/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"855.5,4271.1 796.5,5400.0 -0.0,5400.0 0.0,-0.0 3616.8,-0.0 3736.4,773.0 3749.5,4351.8 855.5,4271.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0075/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6503836910445,39.27232811280363]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64753989526166,39.27032989123726]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65072011591296,39.267578866214855]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6535639116958,39.26957708778122]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p76","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"1"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0076/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0076/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2020.2,5400.0 2024.1,5220.7 872.7,5221.5 764.0,616.5 3107.8,700.8 3107.8,912.0 4352.0,912.3 4352.0,5400.0 2020.2,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0076/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64841056298343,39.27103252510059]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6455353453585,39.26899396399779]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64880469986393,39.26623375360584]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65167991748886,39.26827231470864]}},{"type":"Feature","properties":{"resourceCoords":[2732.0,5220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.649766,39.2670846]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0078/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0078/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"767.4,847.1 1479.0,825.7 1460.6,-0.0 4352.0,-0.0 4352.0,3237.1 3629.3,3197.6 3612.6,5400.0 -0.0,5400.0 -0.0,870.1 608.8,851.8 678.7,772.3 767.4,847.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6444689102265,39.26818889581018]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64170475871633,39.26610648720033]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64501877383809,39.26343235388051]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64778292534825,39.265514762490355]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0079/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0079/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"620.1,3058.9 -0.0,3050.7 -0.0,-0.0 4352.0,0.0 4352.0,3121.9 3797.2,3112.5 3722.5,5400.0 1447.4,5400.0 1488.0,4474.6 584.1,4508.4 620.1,3058.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6574018278625,39.267116106268624]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6546987993474,39.269356762900664]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65113289435105,39.266741797701314]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65383592286615,39.264501141069275]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p80","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0080/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0080/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1372.4,3072.5 1357.2,0.0 4352.0,0.0 4352.0,572.8 2444.7,637.4 2464.9,1409.2 3561.0,1429.4 3556.3,4236.2 2731.8,4267.2 2757.2,5400.0 754.5,5356.5 817.9,3070.1 1372.4,3072.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2180.0,3076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6521264,39.2682543]}},{"type":"Feature","properties":{"resourceCoords":[2180.0,1404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6532263,39.2690689]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p81","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0081/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0081/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5400.0 -0.0,-0.0 4352.0,0.0 4352.0,5157.4 -0.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0081/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.66149333076405,39.26433893333983]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65875442277446,39.26650364576588]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65530951623798,39.26385386492464]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65804842422756,39.26168915249859]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0082/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0082/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1382.2,0.0 4352.0,0.0 4352.0,170.1 3092.7,199.8 3166.4,3331.0 3803.7,3327.0 3801.7,4816.9 1403.0,4970.3 1382.2,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65944298660382,39.26569767288294]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65674726813914,39.26782946354639]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65335468694977,39.265221517600104]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65605040541445,39.263089726936656]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p83","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0083/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0083/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3271.6,2717.7 3246.1,2717.7 3196.1,4868.8 4352.0,4886.7 4352.0,5400.0 -0.0,5400.0 -0.0,335.8 3306.1,139.4 3271.6,2717.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1604.0,1532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.656093,39.262067]}},{"type":"Feature","properties":{"resourceCoords":[3272.0,1532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6550488,39.2628851]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p84","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0084/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0084/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5400.0 -0.0,359.3 4352.0,0.0 4352.0,5400.0 -0.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65611906239495,39.26374346614576]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65352285074447,39.265715366329204]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65038481478008,39.26320361378111]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65298102643057,39.26123171359767]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0085__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p85 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2393.6"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"3006.4"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0085__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0085/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4559.2 2107.2,4591.2 2103.3,4761.4 4352.0,4742.6 4352.0,2393.6 0.0,2394.8 -0.0,4559.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0085__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2812.0,2893.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6574093,39.2689807]}},{"type":"Feature","properties":{"resourceCoords":[396.0,3309.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6586123,39.2675843]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0087__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p87 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"490.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3862.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0087__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0087/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2467.6,5400.0 3011.2,5400.0 3016.7,5072.8 3536.5,5071.7 3551.5,1575.1 1964.3,1488.2 1466.0,-0.0 1185.1,-0.0 1196.1,1446.1 570.6,1411.8 528.0,3208.4 490.0,5400.0 1205.2,5400.0 1395.6,5400.0 1399.4,4879.0 2470.0,4885.2 2467.6,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0087__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1397.5,5104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6458754,39.2625649]}},{"type":"Feature","properties":{"resourceCoords":[2469.0,5104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6451785,39.26204]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0088/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0088/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,3963.4 4340.6,4802.4 3370.6,4802.9 2799.0,5010.9 608.0,5032.3 589.2,1450.4 1998.9,1964.0 2262.9,1245.2 3243.7,3025.7 3418.5,2957.6 3162.5,3176.3 2968.5,3190.0 3254.3,4351.4 4352.0,3963.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64170394790884,39.264276649542275]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63898920924339,39.26215998490532]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6423575495024,39.25953350626768]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64507228816785,39.26165017090464]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p89","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0089/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0089/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2563.8,-0.0 2564.3,517.6 3111.2,514.5 3060.1,5143.8 4352.0,5158.0 4352.0,5400.0 -0.0,5400.0 -0.0,0.0 571.8,-0.0 574.8,529.1 1485.9,523.9 1486.6,-0.0 2563.8,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2564.0,220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6451785,39.26204]}},{"type":"Feature","properties":{"resourceCoords":[1484.0,3392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6478811,39.2609913]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p9","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"22"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0009/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5400.0 -0.0,0.0 2591.3,0.0 2588.9,564.2 3296.0,560.0 3288.1,4903.2 1336.8,4927.9 1334.2,5400.0 -0.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2316.0,3464.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.645952,39.2862021]}},{"type":"Feature","properties":{"resourceCoords":[3296.0,560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6452039,39.2882333]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p90","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0090/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0090/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,-0.0 4352.0,5400.0 -0.0,5400.0 -0.0,243.1 2780.0,212.0 3361.9,-0.0 4352.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2780.0,212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6430836,39.2604781]}},{"type":"Feature","properties":{"resourceCoords":[1668.0,212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6437635,39.2610077]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0091/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0091/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,5400 0,0 4352,0 4352,5400 0,5400\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64938807944715,39.25991197569022]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64598876815502,39.258467857797974]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64828670292994,39.25517884446056]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65168601422207,39.25662296235281]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0092__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p92 [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":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0092__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0092/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4352.0,0.0 2991.9,0.0 2642.9,1136.7 -0.0,325.2 -0.0,5400.0 3414.0,5400.0 3416.0,5400.0 3358.8,4146.0 4352.0,4070.0 4352.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0092__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3048.0,3592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6460314,39.255641]}},{"type":"Feature","properties":{"resourceCoords":[3048.0,1876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6453066,39.2566901]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0093/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0093/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"977.1,5400.0 973.9,5112.6 -0.0,5106.0 -0.0,0.0 4352.0,0.0 4352.0,5155.5 3940.4,5138.4 3942.3,5400.0 2916.9,5400.0 2917.6,5153.8 1975.9,5156.3 1975.3,5400.0 977.1,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0093/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63190246689169,39.26802203626119]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6283671180762,39.26671322464218]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6304499963788,39.26329299503545]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63398534519429,39.26460180665446]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p95 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2108.8"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2108.8,4412.9 2108.8,2225.3 1968.1,2226.6 1965.6,1140.4 2108.8,1139.0 2108.8,282.6 1963.6,283.6 1962.9,-0.0 0.0,-0.0 54.0,5400.0 1048.0,5400.0 1584.0,5400.0 1977.9,5400.0 1973.4,4493.2 2108.8,4412.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__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":[-76.63468996533727,39.265096148396765]}},{"type":"Feature","properties":{"resourceCoords":[2108.8,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63296005830425,39.264444537833704]}},{"type":"Feature","properties":{"resourceCoords":[2108.8,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63510082110754,39.260989214947465]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63683072814055,39.261640825510526]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p95 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"2834.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1518.0"},{"label":"split_canvas_h","value":"4458.0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3907.8,66.6 2976.4,63.3 2974.2,304.7 2834.0,303.9 2836.4,4450.0 3867.7,4453.8 3907.8,66.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0095__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[2834.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63237917266859,39.26424520523571]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63112886249938,39.2637897577639]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,4458.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63284125704548,39.26093180259758]}},{"type":"Feature","properties":{"resourceCoords":[2834.0,4458.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6340915672147,39.26138725006939]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0096/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0096/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5400.0 -0.0,4905.2 537.7,4881.5 398.4,1270.5 398.5,1270.5 362.2,330.8 1478.1,284.5 1464.3,0.0 4352.0,0.0 4352.0,5400.0 -0.0,5400.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63175318425142,39.264021712100266]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62857388004343,39.26271617389099]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63065143800503,39.259640230992304]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63383074221301,39.26094576920158]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1952 | sanborn03573_036 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:12:21Z","modified":"2026-09-21T22:12:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0097/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0097/info.json","type":"ImageService2","height":5400,"width":4352},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,557.6 984.4,495.6 2271.4,0.0 3169.5,0.0 3317.2,458.4 4352.0,415.0 4224.5,5400.0 636.3,5400.0 582.8,5098.1 698.6,4403.5 0.0,4360.8 0.0,557.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195201:03573_01_1952-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6369668336434,39.258882417518016]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6353031570545,39.26152852103871]}},{"type":"Feature","properties":{"resourceCoords":[4352.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63109246373634,39.2599188694927]}},{"type":"Feature","properties":{"resourceCoords":[0.0,5400.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63275614032524,39.257272765972004]}}]}}]}