{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_043.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1953 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"101"},{"label":"placed","value":"91"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 48, georef-snap 42, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p624 (tier 1, 39.33365,-76.62837 +/-275m); p625 (tier 1, 39.31228,-76.62713 +/-257m); p650 (tier 1, 39.33234,-76.61920 +/-256m); p676__2 (tier 1, 39.33705,-76.63502 +/-100m); p677__2 (tier 1, 39.33152,-76.63813 +/-112m); p682__2 (tier 1, 39.34304,-76.63549 +/-100m); p686__2 (tier 1, 39.31012,-76.63402 +/-100m); p691 (tier 1, 39.33034,-76.65067 +/-276m); p692__1 (tier 1, 39.32990,-76.63772 +/-266m); p692__2 (tier 2, 39.33069,-76.63975 +/-621m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0612/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p612","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0612/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0612","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"190.6,250.1 194.3,123.1 379.0,141.8 952.1,190.7 977.6,191.8 944.9,547.6 924.4,800.4 927.2,811.3 1033.7,901.2 1087.0,836.7 1087.0,885.1 941.6,1118.7 832.3,1208.8 460.4,1241.2 232.9,1202.7 168.6,1136.8 167.0,681.5 123.7,628.5 208.3,436.7 113.2,290.0 111.6,250.3 190.6,250.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0612/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[556.0,435.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6410816,39.311987]}},{"type":"Feature","properties":{"resourceCoords":[793.0,1193.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6425125,39.3100689]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0613/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p613","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0613/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0613","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.6,1276.8 174.1,702.3 175.1,517.0 48.5,525.2 40.8,446.8 76.0,442.0 195.5,180.8 791.7,120.8 791.7,136.7 835.8,135.6 968.0,144.4 956.3,304.2 944.8,303.7 947.8,582.8 947.6,1298.1 456.8,1300.4 180.9,1302.3 179.6,1276.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0613/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[756.0,564.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6393658,39.3141944]}},{"type":"Feature","properties":{"resourceCoords":[756.0,1299.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6377616,39.3125601]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0614/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p614","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0614/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0614","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,105.1 1.0,121.3 44.9,120.2 179.6,129.2 167.7,291.9 155.9,291.4 159.0,575.6 159.0,1304.0 354.2,1303.8 547.3,1301.7 738.0,1302.0 738.4,1046.7 905.8,816.9 1080.8,582.5 993.7,524.5 957.5,509.9 986.8,360.9 973.6,357.7 1020.9,153.4 1044.0,157.5 1018.0,109.0 919.7,83.8 898.4,30.6 603.5,134.2 512.4,58.9 416.0,47.5 177.4,125.8 75.2,97.6 1.0,105.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0614/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,557.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6388136,39.314517]}},{"type":"Feature","properties":{"resourceCoords":[159.0,1304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6372131,39.3128856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0615/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p615","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0615/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0615","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.1,219.8 739.2,234.7 987.7,240.1 1031.4,250.5 973.9,288.3 917.1,536.6 761.3,789.3 838.1,869.4 820.8,1027.8 603.0,1020.9 478.0,1170.5 396.2,1201.2 392.1,1209.1 387.5,1161.0 337.4,1231.5 221.0,1147.0 217.2,1135.9 219.2,874.1 225.9,505.1 230.1,219.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0615/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[221.0,755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6401012,39.3111726]}},{"type":"Feature","properties":{"resourceCoords":[221.0,1147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.641173,39.3105146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0616/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p616","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0616/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0616","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"229.2,853.0 226.8,607.9 225.6,105.6 725.9,98.0 921.4,95.8 922.5,118.7 928.8,752.8 922.8,1289.0 919.3,1285.0 793.2,1289.5 439.8,1137.3 418.1,1151.8 423.4,1217.2 330.4,1227.4 337.2,1110.2 216.8,902.1 220.3,896.4 229.2,853.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0616/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[930.0,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63526083799337,39.31179036309642]}},{"type":"Feature","properties":{"resourceCoords":[930.0,101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63662690916568,39.31321246626018]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0617/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p617","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0617/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0617","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"833.9,998.7 816.5,1004.5 555.0,1190.6 407.2,982.2 410.4,697.9 417.1,405.3 312.5,408.5 274.5,417.7 212.0,279.2 199.4,284.2 119.5,90.3 140.7,80.3 207.8,113.6 647.7,63.2 1024.9,129.0 1059.6,127.3 1053.4,236.4 1043.6,710.7 1039.7,1002.7 833.9,998.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0617/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[409.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63615262270277,39.315159529312304]}},{"type":"Feature","properties":{"resourceCoords":[1019.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63399272909817,39.31521126687397]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0618/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p618","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0618/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0618","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.8,762.1 149.2,115.0 148.2,91.7 345.4,89.0 540.3,88.8 868.2,87.8 886.1,93.3 1055.4,218.0 937.1,378.7 936.0,505.5 934.0,760.0 538.8,759.6 537.9,1063.4 347.0,1264.1 347.1,1243.5 147.2,1316.9 140.6,1309.3 150.8,762.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0618/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[548.0,755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6341695924084,39.312435333691184]}},{"type":"Feature","properties":{"resourceCoords":[548.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63553191651866,39.31383177162995]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0619/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p619","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0619/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0619","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.7,707.5 108.1,233.1 109.6,123.8 571.9,81.6 779.6,157.9 1060.0,129.9 1087.0,141.7 1087.0,144.7 1087.0,153.3 1037.0,153.8 972.8,156.4 1018.0,971.9 1001.1,975.4 1002.6,1265.6 998.0,1265.8 835.3,1270.9 207.2,1293.7 132.0,1194.8 127.3,999.5 118.7,707.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0619/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[148.0,269.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6337828582041,39.316406312916286]}},{"type":"Feature","properties":{"resourceCoords":[842.0,985.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63135560720758,39.31442191631055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0620/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p620","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0620/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0620","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"728.0,1268.4 716.9,1248.8 628.5,1125.4 458.7,1242.2 433.2,1252.5 142.6,1246.0 157.3,962.1 174.2,959.6 174.9,159.7 238.3,160.8 287.6,163.1 288.2,151.8 495.2,255.4 577.7,259.1 580.1,312.3 711.1,318.2 727.2,285.1 803.5,317.5 845.4,251.8 863.9,489.1 796.0,486.1 781.6,697.8 955.9,932.4 981.4,1121.8 1009.9,1131.1 728.0,1268.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0620/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63151058567598,39.31711240291925]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62760756644595,39.31724868134926]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62739053523227,39.31347543326786]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6312935544623,39.31333915483785]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0621/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p621","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0621/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0621","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"265.1,1066.9 276.6,1084.0 321.8,812.1 153.1,561.4 478.8,341.2 338.5,130.6 976.7,147.7 968.4,498.1 970.3,883.0 952.5,885.1 971.6,1218.8 964.0,1217.7 906.5,1264.8 363.9,1297.2 141.6,1238.9 265.1,1066.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0621/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[964.0,881.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63130499294108,39.31166147764832]}},{"type":"Feature","properties":{"resourceCoords":[964.0,502.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63137247403725,39.31268251437039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0622/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p622","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0622/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0622","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.3,891.5 110.1,889.3 106.8,504.2 113.8,153.5 279.1,158.1 583.3,165.7 609.6,155.0 784.9,34.2 875.7,162.4 893.2,194.0 898.4,213.7 866.8,257.1 1032.6,499.1 1040.7,882.4 1040.8,1271.3 1030.0,1268.0 587.9,1292.2 112.7,1225.3 92.3,891.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0622/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1001.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62815226849527,39.311281312519085]}},{"type":"Feature","properties":{"resourceCoords":[140.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63129763161943,39.313603034287596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0623/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p623","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0623/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0623","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"366.0,868.0 366.0,493.0 208.8,252.8 240.7,211.1 236.0,191.7 230.2,180.7 517.8,47.9 575.5,68.3 754.3,252.3 852.0,259.0 839.6,439.7 930.7,470.5 989.8,754.2 947.3,1016.3 967.4,1223.8 940.3,1261.2 520.4,1301.1 358.1,1248.5 366.0,868.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0623/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[366.0,868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6280452,39.3117944]}},{"type":"Feature","properties":{"resourceCoords":[366.0,493.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6281366,39.3128253]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0626/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p626","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0626/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0626","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"239.6,13.1 242.7,68.0 508.5,138.1 566.5,134.5 593.4,139.4 598.9,119.2 894.6,106.6 894.6,130.4 888.8,629.3 890.7,1193.1 884.7,1275.0 774.0,1302.9 633.6,1270.8 348.5,1284.8 223.8,1233.9 215.9,1017.8 139.9,793.1 159.8,64.0 128.2,61.2 239.6,13.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0626/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[894.0,491.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61941292565709,39.313141998596436]}},{"type":"Feature","properties":{"resourceCoords":[894.0,1239.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61926863794463,39.31108317296251]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0627/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p627","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0627/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0627","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.7,1194.8 208.8,632.2 211.9,134.3 973.4,134.6 974.6,865.5 975.8,1241.1 342.8,1297.5 241.5,1268.1 208.2,1276.7 213.7,1194.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0627/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[209.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6194274,39.3131335]}},{"type":"Feature","properties":{"resourceCoords":[974.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6166997,39.3132365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0628/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p628","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0628/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0628","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.0,128.2 681.6,128.2 981.4,127.4 983.5,1275.2 215.9,1233.0 210.4,1233.5 209.2,859.2 208.0,130.9 208.0,128.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0628/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[433.0,492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6158967,39.3132668]}},{"type":"Feature","properties":{"resourceCoords":[982.0,492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6139322,39.313341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0629/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p629","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0629/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0629","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.0,119.9 582.9,118.4 975.0,118.2 974.8,823.7 975.3,1260.2 637.4,1233.1 566.2,1293.0 320.9,1320.0 196.6,1270.0 176.7,1268.8 175.0,119.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0629/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,849.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6124973,39.3123861]}},{"type":"Feature","properties":{"resourceCoords":[559.0,484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6125614,39.3133956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0630/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p630","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0630/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0630","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"349.0,841.7 349.0,138.2 833.3,137.0 809.0,681.0 813.6,885.5 857.1,892.5 810.8,943.7 792.9,1210.3 751.7,1257.0 637.7,1300.0 349.6,1277.0 349.0,841.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0630/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[349.0,866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.611011,39.3124452]}},{"type":"Feature","properties":{"resourceCoords":[349.0,502.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6110748,39.3134548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0631/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p631","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0631/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0631","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"911.7,130.3 939.0,556.3 961.5,556.0 963.4,961.1 965.0,961.1 982.1,1227.4 867.8,1277.9 754.7,1268.8 717.6,1307.5 446.9,1270.0 303.9,1308.8 198.2,1304.0 170.0,1257.3 151.7,1105.2 313.9,865.4 352.4,685.6 357.2,579.9 270.2,495.2 316.4,255.2 357.2,247.0 394.5,314.3 379.4,424.6 520.4,430.9 568.8,214.5 911.7,130.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0631/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[534.0,760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62345566054329,39.315555244700484]}},{"type":"Feature","properties":{"resourceCoords":[976.0,958.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62189658271315,39.315079421927145]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0632/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p632","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0632/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0632","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"890.3,1228.2 889.8,952.0 892.9,535.9 894.3,12.6 894.3,1.0 891.6,1.0 861.3,12.2 735.6,9.2 174.3,141.2 197.0,556.9 218.9,556.8 217.0,952.0 218.6,952.0 235.8,1267.0 502.8,1337.6 524.4,1336.3 525.0,1334.0 549.2,1334.7 561.0,1334.0 588.0,1339.0 593.6,1318.7 890.5,1306.3 890.3,1228.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0632/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[596.0,952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6205973,39.3151266]}},{"type":"Feature","properties":{"resourceCoords":[217.0,952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6219398,39.3150695]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0633/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p633","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0633/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0633","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"943.1,20.4 945.5,560.0 944.2,764.8 945.9,976.7 947.8,1321.2 190.5,1323.7 189.2,1222.9 186.0,950.0 185.0,538.8 181.4,21.7 943.1,20.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0633/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[374.0,563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6189452,39.3162682]}},{"type":"Feature","properties":{"resourceCoords":[186.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6195568,39.3151709]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0634/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p634","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0634/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0634","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"954.3,43.6 955.9,586.4 953.8,794.9 953.4,1339.7 923.1,1339.7 923.0,1339.0 899.0,1339.0 898.8,1339.7 873.1,1339.7 873.0,1339.0 856.0,1339.0 855.9,1339.7 786.1,1339.7 786.0,1339.0 767.0,1339.0 766.9,1339.7 721.1,1339.7 721.0,1338.0 681.0,1339.0 680.9,1339.7 654.4,1339.7 651.0,1338.0 547.2,1339.4 502.0,1339.3 502.0,1339.0 413.0,1339.0 181.9,1338.5 182.2,996.8 181.9,784.9 184.4,580.3 185.3,40.9 954.3,43.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0634/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[628.0,582.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6153047,39.3164065]}},{"type":"Feature","properties":{"resourceCoords":[185.0,247.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6169554,39.317273]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0635/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p635","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0635/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0635","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.1,773.6 164.7,564.9 162.1,21.4 752.5,21.6 941.1,21.7 962.5,21.6 962.0,1317.7 570.6,1317.8 163.7,1319.2 163.1,773.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0635/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[547.0,565.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6127583,39.3164931]}},{"type":"Feature","properties":{"resourceCoords":[163.0,229.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6141934,39.3173718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0636/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p636","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0636/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0636","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"318.0,18.6 847.9,18.6 868.5,227.2 824.0,639.2 907.9,716.4 829.6,722.3 803.2,1315.0 318.0,1316.2 318.0,18.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0636/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[318.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6112037,39.3154942]}},{"type":"Feature","properties":{"resourceCoords":[318.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6113296,39.3174848]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0637/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p637","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0637/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0637","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"987.5,810.0 957.4,1252.1 156.9,1047.8 181.7,1019.0 187.9,23.6 390.2,21.6 619.1,21.5 1003.3,16.4 1012.1,809.7 987.5,810.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0637/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[387.0,43.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62454385996335,39.31972306403677]}},{"type":"Feature","properties":{"resourceCoords":[612.0,808.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62246349424822,39.318227037454676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__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 | 1953 | sanborn03573_043 p638 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.1,51.8 150.0,827.0 126.0,827.6 103.9,1260.4 190.6,1280.9 298.7,1338.3 334.7,1338.2 343.6,1320.4 392.4,1226.4 550.8,912.1 550.1,826.4 550.1,826.4 587.4,826.1 594.5,826.0 654.3,706.2 776.1,468.4 981.6,61.4 907.5,34.5 866.0,32.4 751.7,35.2 543.4,39.5 340.9,47.2 128.1,51.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[551.0,400.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6207375,39.3203917]}},{"type":"Feature","properties":{"resourceCoords":[150.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6212349,39.318786]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__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 | 1953 | sanborn03573_043 p638 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.87"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2200.4"},{"label":"split_canvas_y","value":"3288.4"},{"label":"split_canvas_w","value":"2151.6"},{"label":"split_canvas_h","value":"2111.6"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1015.0,857.4 1004.0,881.1 936.7,863.9 728.4,874.4 559.7,884.5 577.8,1254.3 576.1,1274.0 692.2,1267.9 734.5,1268.9 810.5,1294.2 839.3,1308.1 1052.9,902.8 1087.0,918.8 1085.5,825.9 1031.5,822.6 1015.0,857.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0638__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[576.1,1274.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6207616,39.321565]}},{"type":"Feature","properties":{"resourceCoords":[1004.0,881.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.620074,39.3230854]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0639/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p639","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0639/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0639","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.7,1136.1 174.7,1027.4 173.8,666.0 133.3,587.8 173.8,566.9 172.9,429.4 174.0,155.0 365.9,155.5 941.0,155.0 941.2,624.3 944.6,1175.5 174.0,1173.7 173.7,1136.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0639/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[174.0,155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6199015,39.3205388]}},{"type":"Feature","properties":{"resourceCoords":[941.0,155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6171832,39.3206425]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0640/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p640","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0640/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0640","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.0,620.0 162.4,151.4 390.4,150.7 587.5,152.1 943.7,151.2 944.7,635.4 944.0,1171.0 166.8,1170.4 163.0,620.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0640/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[163.0,620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6171003,39.3193559]}},{"type":"Feature","properties":{"resourceCoords":[944.0,1171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6142333,39.3179472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0641/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p641","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0641/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0641","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.8,262.6 201.1,69.8 584.8,59.8 584.8,49.8 735.5,49.4 917.9,48.9 927.4,281.8 915.6,514.6 921.3,514.6 922.6,738.5 913.4,738.5 934.5,1300.1 799.8,1300.6 206.1,1303.2 204.7,769.8 201.8,287.5 201.8,262.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0641/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[398.0,289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6137107532902,39.32076730544139]}},{"type":"Feature","properties":{"resourceCoords":[205.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61424034584782,39.3180001279242]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0642/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p642","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0642/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0642","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"312.2,1299.4 290.6,1299.4 236.0,1299.0 220.4,738.3 229.7,738.4 230.5,514.9 224.8,514.9 238.9,282.6 231.7,50.0 449.1,51.7 449.8,33.5 910.5,73.0 906.3,87.2 917.2,962.4 886.0,1175.6 838.2,1246.3 843.4,1302.2 312.2,1299.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0642/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[420.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61108937803046,39.31961112676493]}},{"type":"Feature","properties":{"resourceCoords":[873.0,1291.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60936593598649,39.31816359476872]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__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 | 1953 | sanborn03573_043 p643 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.6,1269.8 377.6,1269.7 610.8,1271.6 1002.2,1270.0 999.7,470.4 1006.0,322.7 1006.1,187.5 961.3,252.6 758.2,135.3 774.6,98.6 711.8,183.0 586.0,217.6 609.4,342.5 568.0,410.8 602.9,449.4 512.0,685.9 511.6,802.2 187.2,827.3 125.3,900.6 171.6,1269.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[595.0,879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62463079727786,39.320986565162634]}},{"type":"Feature","properties":{"resourceCoords":[970.0,482.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62422884646746,39.32243063155105]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__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 | 1953 | sanborn03573_043 p643 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.16"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2030.0"},{"label":"split_canvas_h","value":"3204.0"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"497.0,89.3 457.7,42.9 350.3,54.1 271.4,120.3 154.4,88.4 162.6,225.7 100.2,466.1 117.1,714.6 150.5,745.4 485.5,748.0 495.5,219.9 497.0,89.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0643__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[119.9,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6248533,39.323435]}},{"type":"Feature","properties":{"resourceCoords":[485.5,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6236453,39.3240269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0644/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p644","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0644/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0644","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.8,87.6 227.0,84.3 595.9,79.1 867.2,77.7 897.2,77.5 945.6,477.2 1000.4,477.1 1002.4,870.6 832.0,872.2 831.0,1245.7 828.4,1265.5 614.7,1264.7 406.9,1267.7 188.6,1267.2 184.4,480.2 190.3,334.8 190.2,201.7 230.8,87.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0644/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[597.0,482.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62290265308735,39.32308039361424]}},{"type":"Feature","properties":{"resourceCoords":[189.0,873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6234264725553,39.32158123860856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0645/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p645","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0645/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0645","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"161.4,666.0 193.8,666.1 211.7,203.1 253.2,204.6 326.6,217.7 933.3,207.2 930.2,664.8 932.4,1131.6 356.6,1134.5 164.4,1134.8 161.4,666.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0645/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[167.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61996617396154,39.321806724572916]}},{"type":"Feature","properties":{"resourceCoords":[550.0,1125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61853799039126,39.32061342403486]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0646/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p646","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0646/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0646","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"204.8,213.8 601.7,211.7 953.6,212.6 952.8,378.8 954.2,702.4 952.9,1117.1 952.6,1142.0 597.8,1141.8 401.4,1139.9 174.2,1139.9 175.0,676.0 181.0,221.3 204.8,213.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0646/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[175.0,676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6172655,39.3219208]}},{"type":"Feature","properties":{"resourceCoords":[627.0,212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6157408,39.3232634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0647/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p647","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0647/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0647","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"746.5,1266.0 595.0,1265.3 594.9,1275.3 209.2,1282.6 210.1,1059.7 208.9,734.6 209.8,567.5 210.7,103.3 843.1,102.4 967.6,103.0 931.5,570.4 919.7,570.4 918.7,803.7 918.1,1037.1 931.0,1267.0 746.5,1266.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0647/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[403.0,568.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6138925,39.3233345]}},{"type":"Feature","properties":{"resourceCoords":[597.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6132908,39.3246373]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0648/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p648","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0648/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0648","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"149.5,571.9 161.1,571.5 179.4,108.2 189.4,107.9 440.7,97.2 891.1,82.3 890.5,123.0 937.5,121.5 968.6,338.6 914.7,1047.2 861.7,1255.5 401.8,1234.8 401.8,1252.8 186.7,1259.9 165.3,1033.2 157.2,802.5 149.5,571.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0648/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[403.0,1025.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6111273,39.322154]}},{"type":"Feature","properties":{"resourceCoords":[477.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6109095,39.3247362]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__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 | 1953 | sanborn03573_043 p649 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3348.8"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2051.2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"938.3,969.8 904.6,950.7 904.0,955.4 299.8,999.6 282.1,991.4 150.6,1035.5 146.4,1296.7 145.6,1344.5 543.0,1305.0 544.0,1250.7 934.4,1257.0 939.1,1048.4 961.1,982.5 938.3,969.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[542.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62167140157554,39.323677689480654]}},{"type":"Feature","properties":{"resourceCoords":[938.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62091322960552,39.322750608739774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__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 | 1953 | sanborn03573_043 p649 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.23"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"3378.0"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"556.0,717.2 805.2,709.9 852.9,833.4 915.5,681.6 816.8,357.7 859.4,114.5 729.7,51.1 533.3,29.9 215.8,51.9 205.9,41.2 210.6,177.1 225.4,726.8 482.1,719.3 556.0,717.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0649__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,726.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62173006153485,39.32487410934768]}},{"type":"Feature","properties":{"resourceCoords":[211.0,40.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62497006444572,39.325737436516256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0651/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p651","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0651/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0651","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"921.9,81.1 921.5,489.6 922.9,881.8 925.8,1300.7 366.9,1301.3 203.1,1302.2 205.9,1267.8 171.9,1152.9 184.6,468.7 149.7,270.0 180.3,143.4 178.0,75.5 921.9,81.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0651/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[366.0,902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6167885,39.3268989]}},{"type":"Feature","properties":{"resourceCoords":[771.0,902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6153548,39.3269514]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0652/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p652","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0652/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0652","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"388.9,212.7 945.5,211.9 945.8,684.0 947.3,1147.1 594.6,1147.8 196.9,1151.7 181.6,760.9 225.8,213.6 388.9,212.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0652/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[393.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6166252,39.32451]}},{"type":"Feature","properties":{"resourceCoords":[620.0,1148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6157408,39.3232634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0653/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p653","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0653/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0653","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.4,855.6 154.9,438.4 154.8,47.9 921.0,45.7 922.3,854.9 920.1,1326.4 785.8,1326.0 155.0,1327.8 156.4,855.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0653/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[540.0,856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6133766,39.325932]}},{"type":"Feature","properties":{"resourceCoords":[540.0,458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6134483,39.3270262]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0654/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p654","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0654/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0654","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"185.8,839.6 181.6,31.1 719.0,32.2 912.4,31.5 966.6,127.8 938.1,1150.9 950.8,1195.6 1033.9,1199.5 1031.4,1253.3 953.1,1249.7 931.7,1287.8 938.4,1349.0 891.0,1349.0 893.0,1308.0 438.8,1308.3 185.4,1310.7 185.8,839.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0654/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[703.0,447.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6102438906909,39.327135734407825]}},{"type":"Feature","properties":{"resourceCoords":[181.0,839.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61203546885406,39.32598938542892]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0655/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p655","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0655/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0655","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"154.2,1142.3 159.0,734.0 162.4,377.0 162.9,206.8 165.6,168.1 288.7,270.9 549.8,507.7 775.0,701.0 927.3,828.5 923.2,1145.8 154.2,1142.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0655/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6149582,39.3292188]}},{"type":"Feature","properties":{"resourceCoords":[775.0,701.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6127845,39.3294071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__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 | 1953 | sanborn03573_043 p656 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.1,1235.4 745.0,1224.3 943.3,1219.2 997.5,854.5 995.4,332.2 964.4,246.3 536.9,170.0 516.6,219.8 512.4,230.3 456.6,298.8 434.4,302.3 397.9,321.6 360.9,366.3 194.2,577.9 170.6,606.5 185.6,910.0 187.6,911.6 194.1,1235.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[674.0,202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61059108326769,39.33102062137264]}},{"type":"Feature","properties":{"resourceCoords":[971.0,516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60953264870432,39.330197001991294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__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 | 1953 | sanborn03573_043 p656 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.76"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1354.4"},{"label":"split_canvas_h","value":"1325.6"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.6,23.9 150.4,99.9 152.6,217.9 152.8,247.3 336.1,245.1 336.2,232.8 151.6,23.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0656__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61268454886093,39.330207741388385]}},{"type":"Feature","properties":{"resourceCoords":[338.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61171951970299,39.3296391182589]}},{"type":"Feature","properties":{"resourceCoords":[338.6,331.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61243712672783,39.32891010594114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,331.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61340215588577,39.32947872907062]}},{"type":"Feature","properties":{"resourceCoords":[152.8,247.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6127845,39.3294071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0657/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p657","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0657/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0657","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.1,1237.3 952.2,1239.3 950.0,881.0 947.9,710.3 950.0,671.4 952.4,646.9 751.4,256.1 743.2,264.8 733.1,276.3 564.0,314.6 401.7,169.1 211.1,1.0 167.8,1.0 168.4,44.0 206.8,70.3 173.3,394.9 206.1,1237.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0657/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[942.0,1239.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61499435989859,39.32921841543424]}},{"type":"Feature","properties":{"resourceCoords":[942.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61507745419911,39.33073397993535]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0658/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p658","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0658/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0658","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"360.5,1321.2 210.8,1324.8 208.6,1025.7 215.8,670.5 212.5,509.0 232.9,494.9 402.6,87.5 465.2,91.0 715.9,103.3 807.7,170.8 842.2,205.5 891.8,264.6 951.8,323.7 933.9,342.3 919.8,474.2 917.3,547.2 918.2,707.6 930.5,885.4 950.9,1033.6 980.2,1177.0 1021.9,1323.5 1004.3,1328.9 949.5,1345.7 938.8,1349.0 860.0,1349.0 851.5,1349.0 835.0,1334.2 797.4,1318.2 740.2,1317.8 474.3,1322.0 360.5,1321.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0658/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[646.0,1043.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6126317,39.3308132]}},{"type":"Feature","properties":{"resourceCoords":[214.0,86.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.616225,39.3314768]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0659/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p659","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0659/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0659","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"843.4,1091.2 777.0,1120.5 652.9,1164.9 628.5,1156.9 601.5,1236.2 570.1,1306.1 555.0,1349.0 526.4,1349.0 88.7,708.0 97.3,698.8 155.7,640.9 395.5,410.9 391.4,385.7 416.0,376.2 584.2,350.9 567.9,249.8 527.4,56.1 558.2,53.0 786.6,6.0 794.2,4.4 852.6,118.0 879.9,177.1 936.8,393.6 952.2,462.4 973.8,600.8 981.7,676.2 989.3,868.1 986.5,1021.1 843.4,1091.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0659/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[625.0,372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61149331630892,39.33363682674537]}},{"type":"Feature","properties":{"resourceCoords":[76.0,701.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61340311514792,39.33458046911618]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0660/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p660","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0660/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0660","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.4,721.0 319.9,631.4 385.3,591.7 502.0,512.4 558.0,468.7 730.7,323.4 772.8,273.1 851.1,171.0 846.4,164.7 846.3,164.6 993.3,176.6 986.1,182.8 1009.2,754.3 965.8,1180.4 967.7,1185.7 544.6,1112.0 546.2,1108.1 553.1,1091.0 412.6,1031.3 282.5,964.0 154.1,886.8 7.9,784.5 148.4,721.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0660/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[950.0,176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60971334440865,39.33366309590517]}},{"type":"Feature","properties":{"resourceCoords":[671.0,1128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61062514531032,39.33106115875112]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0661/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p661","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.64"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0661/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0661","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.2,245.1 157.2,103.7 277.1,171.6 327.5,195.4 390.1,217.8 379.0,154.3 718.0,84.7 729.5,142.0 740.8,102.7 761.1,64.0 801.7,33.7 851.1,26.4 909.5,47.8 929.7,61.8 929.6,141.9 903.1,344.1 869.4,561.8 845.5,648.5 803.8,703.6 839.2,939.6 862.6,984.2 854.6,1042.3 876.4,1187.6 804.2,1188.7 809.1,1252.5 710.6,1322.4 468.4,1265.5 239.2,1067.5 180.6,689.2 132.4,602.3 99.8,235.2 142.2,245.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0661/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6324118,39.3257604]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6285915,39.3253033]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62932479999999,39.3216364]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6331451,39.3220935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0662/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p662","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.48"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0662/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0662","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.1,1090.2 255.1,1035.5 236.9,990.5 225.1,761.4 270.1,712.5 301.1,631.7 353.7,426.5 398.0,235.5 405.6,158.8 408.9,118.2 791.9,103.2 791.6,91.7 892.2,127.8 890.0,145.8 961.0,1073.0 923.6,1165.0 726.8,1195.0 659.8,1264.9 249.3,1231.3 242.1,1090.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0662/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[440.0,838.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6291946,39.3232583]}},{"type":"Feature","properties":{"resourceCoords":[785.0,1183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6279935,39.3222185]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0663/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p663","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0663/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0663","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"741.1,266.0 915.0,267.1 935.0,267.2 933.5,326.2 936.6,360.5 991.5,1173.7 860.8,1177.1 682.8,1080.3 660.6,1147.4 542.2,1164.3 561.6,1210.8 280.8,1191.9 305.4,1115.0 353.0,1111.5 401.0,921.0 192.5,759.5 180.8,262.6 741.1,266.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0663/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[382.0,610.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6390883,39.3291274]}},{"type":"Feature","properties":{"resourceCoords":[199.0,610.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.639703,39.3290076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0664/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p664","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.55"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0664/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0664","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"378.4,133.2 408.8,174.3 445.8,206.9 433.3,156.7 893.4,101.0 911.9,144.9 923.6,193.6 926.6,256.5 919.9,335.1 941.9,344.6 948.5,397.7 926.1,498.3 923.5,566.5 935.4,734.2 960.5,1128.6 985.6,1160.6 998.0,1169.9 963.9,1312.2 921.9,1296.4 916.3,1313.8 887.7,1317.0 377.4,1308.8 121.0,925.9 157.3,536.1 116.0,284.5 254.6,160.1 250.0,133.2 378.4,133.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0664/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[944.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6320784,39.3262197]}},{"type":"Feature","properties":{"resourceCoords":[766.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6326719,39.3269279]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0665/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p665","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0665/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0665","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.9,111.3 37.1,8.2 178.6,7.1 222.7,7.1 936.6,7.3 938.8,609.1 936.8,886.0 929.1,946.5 930.0,1069.4 919.8,1177.5 900.8,1282.7 883.4,1264.8 829.6,1231.9 779.1,1229.5 732.8,1251.5 704.9,1285.9 685.8,1322.8 685.8,1263.6 335.0,1265.7 333.4,1330.9 275.6,1296.3 230.2,1262.6 112.8,1161.4 90.3,1128.3 91.5,738.9 90.8,573.2 97.8,506.4 126.4,408.9 123.3,356.2 102.4,345.4 114.2,268.6 115.3,206.7 107.0,157.9 90.9,111.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0665/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[334.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6312277,39.3262481]}},{"type":"Feature","properties":{"resourceCoords":[684.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6300021,39.3262891]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__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 | 1953 | sanborn03573_043 p666 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.0,31.0 191.7,622.8 187.8,895.0 179.8,954.5 179.7,1075.3 169.0,1181.5 157.3,1243.4 553.8,1270.2 554.8,1258.3 654.5,1306.6 687.7,1165.1 639.0,770.8 714.0,764.9 714.0,750.0 714.0,750.0 904.6,749.9 935.0,633.9 934.9,629.3 935.1,298.3 936.8,206.7 939.2,69.0 920.5,50.2 923.5,33.0 755.4,30.7 339.2,31.7 194.0,31.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[582.0,31.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6278671,39.3287151]}},{"type":"Feature","properties":{"resourceCoords":[194.0,31.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6292484,39.328661]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__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 | 1953 | sanborn03573_043 p666 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.35"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2856.0"},{"label":"split_canvas_y","value":"3000.0"},{"label":"split_canvas_w","value":"1496.0"},{"label":"split_canvas_h","value":"2400.0"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"749.4,882.2 744.5,976.1 733.0,1316.0 795.6,1319.6 980.4,1316.3 1083.2,1234.2 1070.7,784.3 995.5,777.9 962.1,815.5 921.2,761.6 784.3,770.2 756.2,750.0 749.4,882.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0666__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[954.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6257387,39.3271665]}},{"type":"Feature","properties":{"resourceCoords":[733.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6265028,39.3271167]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0667/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p667","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0667/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0667","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.1,261.4 112.3,235.1 105.7,183.0 428.9,197.1 747.1,214.5 819.8,218.8 928.2,224.4 902.0,1146.6 860.7,1144.1 723.0,1137.0 769.4,1240.5 770.0,1242.7 324.9,1240.3 330.7,1289.7 299.4,1254.1 275.4,1211.3 153.0,1195.8 146.9,1055.5 187.8,942.6 103.0,287.3 101.1,261.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0667/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[723.0,1137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6323981,39.3285532]}},{"type":"Feature","properties":{"resourceCoords":[109.0,209.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6349357,39.3309461]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0668/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p668","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0668/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0668","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"215.1,1132.5 213.5,1132.5 195.8,208.4 215.3,208.5 657.7,209.5 919.9,211.5 912.2,1140.8 215.1,1132.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0668/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[403.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.631164,39.329858]}},{"type":"Feature","properties":{"resourceCoords":[916.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6293254,39.3299362]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0669/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p669","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0669/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0669","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"63.5,196.8 376.4,130.8 401.9,122.7 421.8,117.0 427.8,115.2 902.2,108.3 904.6,360.3 909.8,652.8 911.0,825.6 917.8,1037.1 922.2,1251.9 598.0,1255.0 269.0,1261.6 113.8,453.5 68.4,221.5 63.5,196.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0669/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[914.0,368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63280056593393,39.333526764086145]}},{"type":"Feature","properties":{"resourceCoords":[914.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63268044604843,39.33111964680907]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0670/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p670","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0670/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0670","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"769.0,1263.6 316.4,1271.2 185.1,1273.2 110.5,1273.8 105.4,1057.3 98.0,844.2 96.3,670.0 90.2,375.2 87.0,121.2 493.6,114.2 1015.6,105.2 1025.5,377.6 1029.5,527.5 1037.2,1260.4 769.0,1263.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0670/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[510.0,393.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63136087039842,39.33353923200176]}},{"type":"Feature","properties":{"resourceCoords":[510.0,1255.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63125300498177,39.331202026426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0671/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p671","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0671/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0671","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"479.5,1234.5 192.7,1237.2 194.9,517.1 192.9,369.7 188.1,150.2 575.9,145.4 575.4,85.5 642.2,85.2 934.8,244.3 935.9,339.2 938.9,609.6 943.6,609.6 943.7,611.5 955.8,1076.7 924.6,1234.2 479.5,1234.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0671/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[581.0,642.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6281241,39.3329329]}},{"type":"Feature","properties":{"resourceCoords":[187.0,102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6296243,39.3343687]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0672/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p672","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0672/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0672","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"200.3,198.6 483.9,195.6 923.8,194.7 922.4,201.7 956.3,904.2 919.0,1122.0 753.1,1120.2 342.4,1122.3 199.1,1122.0 200.3,198.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0672/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[939.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6266851,39.330471]}},{"type":"Feature","properties":{"resourceCoords":[582.0,1121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6278671,39.3287151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0673/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p673","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0673/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0673","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.9,391.7 226.4,322.4 255.4,203.7 370.6,226.8 420.4,71.1 870.0,69.9 851.2,307.1 863.5,307.0 898.9,558.2 891.3,786.1 895.5,786.1 849.2,1171.0 686.7,1171.2 142.7,1171.7 118.9,391.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0673/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[418.0,784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6394326100508,39.331118175609205]}},{"type":"Feature","properties":{"resourceCoords":[134.0,368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64076933093705,39.33204726726012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0674/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p674","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0674/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0674","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"219.4,797.0 215.1,796.9 224.8,568.4 191.8,316.1 179.4,316.1 200.5,78.3 287.9,79.0 454.5,80.1 971.8,83.6 967.7,318.5 950.8,1136.1 949.7,1189.1 934.6,1213.8 933.0,1223.0 734.5,1207.9 698.4,1310.0 583.0,1326.2 194.5,1242.6 193.5,1240.3 195.1,1182.8 175.7,1182.6 169.3,1182.5 219.4,797.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0674/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[768.0,322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63630092823784,39.333063958357585]}},{"type":"Feature","properties":{"resourceCoords":[169.0,1184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63760997604237,39.330359133003945]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0675/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p675","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0675/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0675","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"932.3,1190.0 931.4,1310.5 762.8,1310.9 217.8,1312.2 275.0,1133.8 161.2,743.2 170.2,622.9 120.5,554.5 164.1,125.8 161.9,121.0 213.7,108.8 215.0,218.3 833.4,150.1 864.7,291.5 900.1,444.6 972.9,426.6 942.9,932.4 934.6,931.0 936.2,1044.7 936.5,1066.3 932.3,1190.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0675/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[927.0,1064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63781465298898,39.33414444576092]}},{"type":"Feature","properties":{"resourceCoords":[927.0,1294.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63762249886638,39.33353715006909]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0676__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 | 1953 | sanborn03573_043 p676 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0676__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0676","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"73.2,279.6 107.7,435.4 181.8,417.9 146.2,931.4 137.9,930.0 138.4,1067.4 132.9,1193.0 130.8,1315.5 662.6,1319.5 663.1,1293.7 989.9,1294.9 1017.1,1292.3 1034.5,1291.0 1087.0,1077.0 1087.0,777.8 1087.0,266.7 1050.7,244.3 702.0,324.9 680.6,325.6 674.7,212.1 663.2,155.6 626.9,17.2 486.1,17.5 484.8,12.3 321.4,52.4 321.3,51.9 49.0,164.6 73.2,279.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0676__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[151.0,1060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63774443752385,39.334172037976565]}},{"type":"Feature","properties":{"resourceCoords":[660.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63585451024045,39.33395143534755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0677__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 | 1953 | sanborn03573_043 p677 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0677__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0677","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.8,113.6 307.6,630.5 25.7,630.5 118.0,1076.9 110.2,1293.8 113.6,1292.8 119.6,1291.1 597.0,1287.6 1002.8,1284.8 998.2,253.2 773.6,253.3 699.1,246.4 623.0,228.5 588.3,215.1 589.1,174.6 566.0,1.2 539.0,1.2 440.9,44.9 436.4,37.2 354.8,71.3 358.3,81.8 314.7,101.2 309.4,91.6 304.8,113.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0677__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[982.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63169241094748,39.33708405382701]}},{"type":"Feature","properties":{"resourceCoords":[982.0,1278.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.631527590441,39.33430928859624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0678/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p678","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0678/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0678","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"364.9,1077.0 96.3,1073.8 104.2,542.2 254.6,544.2 285.3,132.4 309.1,132.0 335.9,131.2 418.7,123.5 508.3,118.8 530.3,119.6 579.9,125.3 603.1,131.4 737.1,132.9 764.9,159.6 816.8,115.5 1001.5,516.6 967.9,481.8 929.8,430.9 937.1,493.6 994.2,549.2 950.5,549.1 937.4,553.6 950.0,558.2 978.9,559.0 1065.8,765.7 1050.5,780.7 916.3,1135.9 916.3,1142.6 958.8,1047.9 939.5,1308.1 756.6,1321.8 756.9,1349.0 756.2,1349.0 754.4,1349.0 755.0,1207.4 755.2,1157.7 603.4,1072.0 568.4,1071.6 568.2,1103.0 365.1,1102.2 364.9,1077.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0678/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62816980886215,39.33454776554225]}},{"type":"Feature","properties":{"resourceCoords":[580.0,120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62858561794219,39.33947897922642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0679/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p679","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0679/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0679","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"998.3,1337.7 999.9,1337.7 1002.7,1337.5 995.9,962.3 1008.8,965.1 1007.8,724.5 998.1,659.5 994.9,415.1 1031.4,414.6 870.4,232.9 864.0,93.8 855.5,64.9 731.8,71.0 727.1,71.1 665.0,1.0 506.0,1.0 229.3,59.5 223.8,86.1 193.8,231.1 175.3,333.1 200.4,409.7 175.6,685.9 159.3,890.4 141.2,1103.2 148.8,1104.7 145.7,1179.0 273.0,1271.6 571.9,1325.7 786.5,1327.0 941.1,1282.0 998.8,1310.5 998.3,1337.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0679/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[606.0,421.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63900505262522,39.34002579701346]}},{"type":"Feature","properties":{"resourceCoords":[990.0,705.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63930242801979,39.33874377251682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0680/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p680","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"33"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0680/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0680","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"583.7,1327.0 376.4,1311.0 335.2,1211.5 254.4,1207.3 258.9,1115.7 198.7,1072.6 202.2,996.8 206.6,996.8 210.7,626.0 223.3,629.2 229.2,391.5 221.6,327.0 225.4,85.6 383.1,88.1 947.8,77.5 1006.5,76.4 974.6,209.0 969.3,209.1 969.6,372.2 1013.0,654.5 984.2,653.6 899.6,1260.3 794.8,1235.1 793.9,1287.5 583.7,1327.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0680/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[491.0,641.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6396842,39.3377155]}},{"type":"Feature","properties":{"resourceCoords":[608.0,84.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6377328,39.3381518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0681/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p681","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0681/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0681","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"625.7,1318.7 656.9,1349.0 765.0,1349.0 766.0,1340.0 782.0,1340.0 783.0,1349.0 802.0,1349.0 803.0,1339.0 819.0,1339.0 820.0,1349.0 871.0,1349.0 872.0,1338.0 931.0,1337.0 961.0,1340.0 962.0,1349.0 978.0,1349.0 979.0,1339.0 1001.0,1339.0 1003.0,1349.0 1006.0,1336.0 1037.3,1336.0 1042.3,1324.9 1038.6,1321.5 1020.0,1304.3 1013.0,1297.8 926.2,51.4 876.5,52.0 770.0,1.0 592.3,1.0 596.1,97.7 567.5,105.8 429.8,110.8 248.3,268.2 248.7,389.9 270.1,955.1 277.4,1152.7 276.3,1208.6 257.9,1317.4 278.4,1321.2 625.7,1318.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0681/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[624.0,1314.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6354395442306,39.336891221779894]}},{"type":"Feature","properties":{"resourceCoords":[260.0,1314.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6365964653113,39.33643726201064]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0682__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 | 1953 | sanborn03573_043 p682 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0682__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0682","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.8,54.4 118.9,57.5 121.0,58.5 171.8,57.6 240.9,992.1 265.8,1328.9 273.0,1335.5 309.0,1338.0 310.0,1349.0 358.0,1349.0 359.0,1338.0 448.0,1340.0 449.0,1349.0 557.0,1349.0 558.0,1340.0 587.0,1340.0 587.0,1340.5 647.0,1121.5 670.4,1013.6 690.6,883.1 709.4,762.3 719.5,700.1 728.4,645.7 612.5,1.0 507.9,1.0 497.6,39.0 441.6,42.8 324.0,52.5 323.0,44.9 306.9,45.2 299.8,54.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0682__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[508.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63515420520491,39.34030054466511]}},{"type":"Feature","properties":{"resourceCoords":[359.0,1322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63394904545132,39.337545751189516]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0683/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p683","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0683/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0683","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"168.6,75.5 375.3,183.8 837.1,190.4 1002.0,261.6 981.0,342.6 1000.1,343.2 937.8,672.6 868.8,999.8 815.5,1252.2 805.9,1299.6 749.0,1298.6 737.8,1337.2 682.0,1340.0 564.9,1347.5 564.0,1340.0 548.0,1340.0 540.8,1349.0 360.8,1349.0 253.3,1295.8 75.2,1293.5 74.6,1268.3 74.5,1263.6 147.4,1202.1 151.0,1048.1 97.9,764.2 80.6,760.2 176.3,465.9 201.1,471.8 180.2,174.8 198.0,186.5 167.7,95.4 100.2,30.0 138.3,41.8 168.6,75.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0683/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[529.0,741.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.637148,39.3419832]}},{"type":"Feature","properties":{"resourceCoords":[815.0,692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6363381,39.3424617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0684/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p684","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0684/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0684","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"339.4,1194.8 267.2,1177.4 195.0,1149.0 162.8,1130.9 169.4,1091.3 171.2,917.6 169.1,673.6 162.4,564.9 146.6,435.6 134.1,333.3 590.0,212.6 584.7,199.2 1087.0,380.7 1087.0,495.1 1049.7,491.6 1004.2,486.7 847.0,1266.3 560.1,1226.5 339.4,1194.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0684/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[547.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63168566474813,39.337104670215155]}},{"type":"Feature","properties":{"resourceCoords":[902.0,1269.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63041865215857,39.337156050318356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0685/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p685","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0685/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0685","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"968.9,156.3 928.5,730.8 889.3,1317.1 675.4,1329.1 675.0,1336.8 600.6,1344.3 609.3,1328.1 453.8,1308.2 436.4,1265.9 266.8,1210.0 131.9,778.8 111.0,604.7 205.6,270.0 194.0,99.0 240.8,20.3 780.7,31.0 942.7,126.2 970.5,119.6 968.9,156.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0685/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[280.0,435.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64419079483395,39.34230873364363]}},{"type":"Feature","properties":{"resourceCoords":[716.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64176992656434,39.34041337102384]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0686__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 | 1953 | sanborn03573_043 p686 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.70"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0686__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0686","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.3,1316.7 343.4,1295.9 610.0,1270.6 678.2,1233.3 778.4,1232.8 921.3,1235.6 930.5,1235.8 962.2,939.7 986.7,940.4 908.2,665.0 927.2,672.5 880.6,592.7 804.1,544.6 842.3,548.0 392.3,218.5 218.2,149.5 174.5,161.9 174.6,197.3 159.7,751.3 146.3,1316.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0686__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1009.0,941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.638528,39.3422329]}},{"type":"Feature","properties":{"resourceCoords":[642.0,1253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6395083,39.3411034]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0687/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p687","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0687/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0687","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"713.2,1271.1 501.1,1313.5 215.9,1296.8 153.8,1227.1 141.6,1123.7 172.0,534.2 132.2,357.2 188.1,110.4 389.1,121.7 612.2,57.9 689.0,194.5 800.9,251.9 984.4,228.0 713.2,1271.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0687/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65660128712447,39.33324967571248]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65311307947529,39.33464353950623]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65089274492145,39.33127211067871]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65438095257063,39.32987824688496]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0688/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p688","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0688/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0688","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"760.0,1271.7 158.6,1247.3 276.4,166.1 302.1,158.7 327.8,234.0 493.2,290.0 575.4,107.8 858.2,14.1 943.7,94.3 901.5,249.1 1045.9,298.0 960.8,605.1 959.7,926.4 957.5,948.3 954.9,1228.6 760.0,1271.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0688/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[651.0,932.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6509116,39.3322587]}},{"type":"Feature","properties":{"resourceCoords":[651.0,1247.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6505483,39.3314292]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0689/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p689","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0689/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0689","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"170.5,936.4 173.0,914.0 178.4,586.9 269.4,275.2 300.0,286.0 317.9,250.4 506.4,280.4 561.0,200.2 702.5,155.8 766.1,183.6 791.5,245.0 917.3,289.5 837.4,470.9 874.9,557.5 973.8,592.5 946.5,594.6 947.6,1004.1 963.0,1077.0 952.1,1224.8 944.0,1221.5 472.8,1264.5 179.8,1218.5 164.0,1221.8 170.5,936.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0689/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[173.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6498671,39.332549]}},{"type":"Feature","properties":{"resourceCoords":[948.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6472887,39.3332546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0690/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p690","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0690/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0690","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.7,585.2 249.3,392.7 381.0,345.6 462.6,206.0 594.4,174.0 639.6,67.9 866.9,113.0 921.5,131.1 921.7,252.3 1012.8,403.6 963.4,796.1 1025.6,867.2 1027.5,1074.7 1006.3,1123.2 847.4,1191.7 700.4,1163.1 265.7,1225.9 170.6,1189.7 178.3,1046.2 162.0,975.9 153.0,579.0 179.4,576.5 205.7,585.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0690/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6463492,39.3347075]}},{"type":"Feature","properties":{"resourceCoords":[153.0,579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6476698,39.3340751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0693/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p693","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0693/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0693","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.1,477.1 226.8,440.6 191.2,279.2 182.5,282.6 176.3,241.9 185.9,241.9 240.0,148.0 640.9,137.9 751.5,104.9 951.4,124.5 947.5,303.1 942.0,657.4 938.8,818.5 932.0,1022.5 978.4,1028.6 1061.3,1027.3 1063.6,1051.9 1085.6,1068.0 1087.0,1077.5 711.8,987.3 715.1,993.6 496.6,1078.2 494.6,1069.7 481.7,1013.3 309.8,741.5 291.9,748.8 283.7,726.9 276.0,688.1 258.9,602.2 234.1,477.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0693/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[782.0,626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63193894906267,39.341884969736505]}},{"type":"Feature","properties":{"resourceCoords":[413.0,651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63454672393456,39.341587522505456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0694/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p694","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0694/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0694","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.1,1049.2 296.4,1024.8 213.8,1027.8 167.4,1022.7 169.8,819.4 169.7,658.8 167.5,305.8 167.7,127.8 223.3,132.1 483.1,115.2 788.7,66.9 968.5,82.1 972.1,104.3 982.9,104.9 985.2,169.4 987.7,257.6 977.6,370.1 973.7,398.4 948.2,728.8 931.6,735.1 928.8,756.0 904.4,879.8 895.6,928.7 891.4,975.2 883.7,1119.7 884.5,1152.2 890.1,1189.0 899.8,1214.5 807.0,1349.0 803.5,1349.0 801.9,1349.0 678.3,1086.1 629.1,1128.4 602.5,1103.2 474.8,1102.8 452.6,1097.1 405.3,1092.0 404.6,1092.0 384.3,1091.5 298.9,1096.6 220.1,1104.5 213.0,1104.8 206.1,1048.8 323.0,1074.2 322.8,1065.0 321.4,1064.8 299.1,1049.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0694/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[474.0,345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6287397,39.3436118]}},{"type":"Feature","properties":{"resourceCoords":[319.0,484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6297896,39.3427949]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0695/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p695","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0695/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0695","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.6,185.9 172.6,126.0 172.0,59.9 240.6,65.7 794.5,35.1 976.0,80.6 1002.9,78.5 990.8,398.1 992.3,398.1 1003.7,398.7 1013.3,426.3 1025.0,447.8 1044.5,472.4 1078.0,503.7 1056.3,500.4 989.2,494.6 965.5,765.1 1068.8,846.5 1057.2,860.0 970.3,791.3 967.4,934.7 970.6,931.5 979.4,923.5 944.8,1126.7 862.3,1047.9 771.1,960.9 741.8,960.3 743.4,934.4 723.4,915.3 540.6,860.5 502.7,879.2 481.4,889.4 438.5,909.5 417.0,912.4 392.8,907.0 370.1,894.3 358.3,883.4 346.1,863.1 77.5,817.2 98.3,725.0 101.8,703.6 119.0,697.6 154.3,360.1 159.2,331.2 172.6,216.3 172.6,185.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0695/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1063.0,850.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61853546482335,39.34125447811087]}},{"type":"Feature","properties":{"resourceCoords":[197.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62502982146273,39.345110087630715]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0696/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p696","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0696/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0696","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.5,1089.0 196.9,888.2 188.8,896.5 185.8,899.8 180.6,759.4 269.5,821.7 280.1,807.8 174.4,734.0 182.4,467.8 248.4,469.7 269.8,471.7 235.3,443.0 214.8,420.0 202.2,399.6 191.2,373.1 180.0,373.2 178.6,373.2 172.4,59.8 296.1,42.9 719.0,74.1 722.8,25.2 742.4,23.3 743.5,72.3 892.3,93.5 942.3,84.6 943.5,124.5 946.0,301.1 949.4,354.9 956.4,410.5 965.1,453.7 986.9,533.5 1007.6,593.0 932.3,666.4 899.9,696.6 839.5,746.5 808.9,769.7 794.2,780.1 752.8,1006.5 768.3,1039.0 786.0,1079.1 812.4,1139.8 740.8,1176.2 697.4,1196.8 613.9,1232.6 527.4,1262.1 435.9,1287.0 382.6,1297.6 288.5,1307.5 286.6,1219.5 281.6,1196.6 268.0,1170.1 177.4,1091.5 174.5,1089.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0696/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61851245193395,39.34128003715946]}},{"type":"Feature","properties":{"resourceCoords":[471.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61710360031925,39.340334362840956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0697/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p697","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0697/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0697","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"369.8,1137.5 325.2,1167.0 274.4,1198.5 247.1,1137.8 230.7,1101.8 228.8,1097.7 212.7,1065.2 251.7,837.0 266.4,826.3 290.6,807.4 296.8,802.5 357.0,751.6 389.2,720.8 464.0,646.1 442.5,586.5 419.6,506.4 410.2,463.1 402.5,407.2 398.5,353.1 393.8,175.6 392.1,135.4 401.2,133.6 415.6,163.4 693.9,162.7 863.1,209.6 914.3,249.8 945.0,334.1 984.1,354.4 1000.8,394.0 1023.5,677.7 1062.7,693.1 1062.4,1038.0 1087.0,1045.8 1062.2,1050.3 1062.1,1085.3 995.0,1084.5 994.8,1163.4 975.6,1161.6 932.0,1152.5 905.4,1144.8 852.2,1125.7 818.5,1110.8 772.1,1085.0 733.1,1058.6 688.8,1022.7 470.0,1064.0 369.8,1137.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0697/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[132.0,916.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6156805,39.3410631]}},{"type":"Feature","properties":{"resourceCoords":[997.0,574.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6095933,39.3430075]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0698/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p698","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0698/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0698","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"399.5,1178.1 386.3,1175.0 396.4,1115.1 402.2,1059.9 404.4,992.4 399.4,924.6 394.9,888.9 384.9,829.3 373.7,780.7 358.0,729.0 312.0,593.9 283.3,520.0 259.8,463.7 207.6,350.5 180.3,296.2 227.8,261.1 269.2,228.3 361.7,147.8 573.6,89.0 620.2,120.7 660.7,143.4 708.4,165.0 742.9,176.8 796.8,191.3 823.6,196.7 867.2,202.1 886.3,202.2 879.9,124.6 946.0,119.8 961.2,310.9 921.0,328.3 975.1,1153.5 979.1,1282.4 959.6,1302.5 887.3,1303.1 810.2,1217.7 801.2,1205.3 728.9,1271.0 689.9,1303.2 637.0,1237.9 626.9,1229.8 617.2,1237.8 459.3,1193.2 420.1,1182.9 399.5,1178.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0698/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[773.0,834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6106661,39.3363274]}},{"type":"Feature","properties":{"resourceCoords":[358.0,729.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6135836,39.3370659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p699","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"216.1,1321.3 309.2,1325.0 407.3,1316.8 804.5,1289.5 807.7,1337.0 838.0,1337.0 849.0,1349.0 849.4,1325.9 857.5,762.9 860.5,587.3 852.3,541.1 827.4,487.2 652.6,323.3 482.8,167.1 302.3,1.0 243.7,1.0 200.0,994.7 205.5,998.6 203.4,1349.0 216.1,1321.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[212.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6206464,39.3385034]}},{"type":"Feature","properties":{"resourceCoords":[858.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6183466,39.3386215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699A/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p699A","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699A/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699A","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"529.5,1318.3 402.9,1218.5 271.2,1211.4 269.8,1147.7 192.6,1128.9 190.7,1003.9 215.3,1027.0 242.1,997.2 222.9,979.5 271.6,233.5 270.8,86.7 270.7,85.7 281.3,85.5 283.1,57.8 376.1,60.4 474.1,51.0 870.5,19.0 907.4,491.8 914.4,491.9 909.6,1291.0 529.5,1318.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699A/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[472.0,490.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61973438373236,39.335706836449994]}},{"type":"Feature","properties":{"resourceCoords":[910.0,490.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61817243408177,39.33577233902621]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699B/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p699B","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699B/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699B","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.6,573.5 145.1,572.5 150.3,572.4 241.4,435.0 231.2,409.4 224.8,372.4 223.4,339.6 228.6,193.7 231.9,146.6 239.9,97.1 245.8,63.5 512.4,96.7 525.3,116.1 537.4,126.3 560.4,137.8 584.4,142.0 605.4,138.2 646.8,116.5 651.5,113.9 667.3,105.5 703.7,85.4 886.2,131.0 902.3,145.1 906.8,148.9 897.9,675.7 900.7,677.6 906.0,928.5 887.1,1304.7 896.9,1313.5 883.7,1328.7 871.1,1317.2 870.8,1308.7 807.0,1303.7 683.0,1200.3 491.8,1178.0 417.4,1192.4 409.1,1214.2 176.5,1180.5 175.4,1202.7 136.9,1294.8 136.8,1288.3 256.9,943.4 271.3,928.5 182.5,731.9 154.8,731.9 142.5,727.8 155.0,723.1 197.0,722.1 140.7,670.1 132.1,609.9 170.0,657.9 203.2,690.5 145.6,573.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699B/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[902.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62041699950473,39.33421120738034]}},{"type":"Feature","properties":{"resourceCoords":[223.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62538951320387,39.3373027469687]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699C/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_043 p699C","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:13:59Z","modified":"2026-10-24T15:13:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699C/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699C","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"275.6,568.9 272.1,568.1 300.2,354.6 315.3,357.6 319.6,364.7 322.1,353.3 381.7,75.9 476.7,88.6 531.8,90.8 627.7,88.2 719.9,80.0 810.5,64.7 858.2,54.9 937.3,36.3 945.6,97.3 958.5,223.0 962.5,284.8 965.8,365.1 965.4,509.7 963.5,564.4 958.1,614.7 948.0,675.1 940.6,710.7 922.9,777.2 898.5,841.2 874.7,892.1 845.0,946.1 856.8,953.5 869.6,961.5 591.3,1245.0 598.4,1252.9 541.5,1253.6 437.9,1323.8 407.0,1344.5 400.8,1349.0 313.7,1349.0 250.0,1260.2 174.5,1156.6 153.8,1151.9 193.2,963.2 189.4,962.7 275.6,568.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195306:03573_06_1953-0699C/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62106939545069,39.3383810211224]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61368629175733,39.33993506922424]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6112106588062,39.332799528043665]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61859376249956,39.33124547994183]}}]}}]}