{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_035.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1950 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"65"},{"label":"placed","value":"62"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef-snap 30, georef 29, georef-street 2, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"3 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p0__2 (tier 1, 39.35374,-76.63061 +/-100m); p1440__1 (tier 2, 39.34841,-76.61930 +/-1304m); p1453__2 (tier 2, 39.35610,-76.60558 +/-428m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1401/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1401","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1401/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1401","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1324.4,276.0 1240.3,550.0 1272.0,550.0 1272.0,1872.1 323.6,1941.3 204.0,1849.0 274.8,1848.7 275.1,1805.0 271.4,1114.1 257.0,915.2 228.1,785.1 179.9,643.0 125.8,529.7 24.5,365.1 25.0,350.0 14.0,348.0 14.0,266.9 1324.4,276.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1401/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1272.0,1166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6340404,39.3459928]}},{"type":"Feature","properties":{"resourceCoords":[1272.0,550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6326274,39.3461542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1402/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1402","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1402/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1402","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"260.8,562.2 229.8,562.4 310.6,293.9 1198.5,295.4 1209.1,72.8 1236.8,146.0 1224.5,389.6 1355.7,512.4 1380.8,649.8 1357.9,758.1 1228.9,881.0 1185.9,1860.2 981.7,1939.0 317.5,1852.0 267.7,1855.9 260.8,562.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1402/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,1165.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6340404,39.3459928]}},{"type":"Feature","properties":{"resourceCoords":[1188.0,1165.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.633732,39.3443164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1403/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1403","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1403/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1403","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.7,1965.0 518.6,1975.7 601.2,1944.8 1068.2,1958.1 1076.5,1940.2 1096.7,1573.5 1247.7,1.0 1211.5,1.0 1184.3,179.1 713.8,101.7 712.0,116.4 301.4,146.9 299.7,1965.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1403/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63307138900694,39.34809308196037]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62964339096025,39.34847356054086]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62895050260106,39.34468737113081]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.63237850064775,39.34430689255032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1404/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1404","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1404/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1404","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.6,131.8 46.8,1564.0 28.5,1943.0 20.2,1961.5 1305.9,1987.9 1388.5,1991.8 1405.0,1978.0 1405.1,1971.9 1404.0,1972.0 1405.0,1926.0 1405.6,1926.0 1406.0,1892.0 1406.0,1857.0 1406.4,1857.0 1406.5,1846.0 1406.0,1846.0 1407.0,1806.0 1413.9,1806.3 1410.3,1792.2 1407.0,1792.0 1407.0,1779.2 954.0,1.0 903.2,1.0 904.2,4.8 721.6,75.5 719.6,121.9 173.6,131.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1404/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[668.0,516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62880300141266,39.347496459742075]}},{"type":"Feature","properties":{"resourceCoords":[668.0,1972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62834667096361,39.34487640990076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1405/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1405","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1405/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1405","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1354.3,1716.9 1305.5,1300.2 1290.3,1299.0 1349.3,816.8 1164.6,796.4 1163.6,772.6 1163.0,759.6 1357.3,770.2 1329.3,228.8 1283.2,228.3 1207.0,49.5 1202.2,50.9 1200.5,1.0 1198.9,1.0 395.9,234.5 376.7,240.1 376.6,272.2 1.0,383.5 1.0,471.1 101.2,463.4 148.1,463.4 117.6,772.0 108.0,772.0 105.6,1381.8 311.5,1397.2 424.4,1422.5 548.9,1464.3 631.9,1501.0 768.1,1575.9 851.0,1631.1 966.2,1732.2 1354.3,1716.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1405/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[108.0,772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.630374,39.350341]}},{"type":"Feature","properties":{"resourceCoords":[1134.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6288438,39.3485742]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1406/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1406","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1406/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1406","type":"ImageService3","width":1431,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1344.0,2021.6 1291.2,2022.2 1273.5,2022.4 1222.4,1983.5 1004.2,1922.3 298.0,1890.5 299.9,1716.8 113.3,1539.2 109.1,1415.3 224.0,1170.0 275.1,1014.3 305.0,859.0 279.1,685.4 238.2,546.6 201.7,452.6 170.8,345.5 145.6,226.9 135.9,58.7 344.1,82.6 457.6,112.9 582.1,160.4 664.9,201.0 799.9,282.5 881.7,341.9 994.4,449.1 1074.8,449.2 1075.3,530.0 1187.7,710.1 1242.2,822.5 1291.0,963.6 1320.6,1092.9 1336.2,1290.7 1344.0,1978.1 1344.0,2021.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1406/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[305.0,859.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.633601,39.34973]}},{"type":"Feature","properties":{"resourceCoords":[224.0,1170.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.634345,39.349796]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1407/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1407","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1407/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1407","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"762.5,102.7 1407.0,104.1 1407.0,1113.4 1405.2,1722.6 1238.7,1738.2 1122.0,1767.5 1017.0,1802.0 925.1,1841.7 788.9,1887.2 617.7,1919.2 462.6,1895.2 306.3,1850.1 58.9,1745.0 64.2,1744.7 85.8,1037.3 193.8,861.9 302.2,253.2 192.1,234.2 178.4,150.6 494.2,131.3 492.8,15.2 577.4,17.6 762.5,102.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1407/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[681.0,1017.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.633673295075,39.35137125321278]}},{"type":"Feature","properties":{"resourceCoords":[654.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63396209673407,39.35303665150753]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1408/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1408","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1408/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1408","type":"ImageService3","width":1432,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1258.2,2018.6 1233.8,2018.7 1118.0,1637.5 1101.2,1637.6 1029.5,1638.0 1038.0,1740.7 1038.4,1788.2 725.1,1759.3 725.1,1749.6 106.5,1751.2 102.0,1137.8 91.3,121.4 393.9,117.8 1173.9,108.6 1206.9,108.1 1403.2,2018.1 1353.4,2018.3 1316.2,2018.4 1142.2,1418.7 1143.8,1438.0 1162.8,1671.2 1266.4,2018.6 1258.2,2018.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1408/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1230.0,864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.629395,39.352016]}},{"type":"Feature","properties":{"resourceCoords":[712.0,114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6307612,39.353275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1409/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1409","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1409/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1409","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.4,1883.0 89.2,1130.6 171.9,549.8 74.3,70.7 196.2,59.2 407.4,57.4 1106.3,71.7 1115.1,71.9 1139.0,305.5 1171.9,546.6 1305.8,1665.8 1348.9,1976.0 1045.5,1984.5 394.6,2000.5 205.3,1919.7 118.4,1883.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1409/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1286.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6317302,39.3540586]}},{"type":"Feature","properties":{"resourceCoords":[246.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6341402,39.3539141]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1410/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1410","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1410/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1410","type":"ImageService3","width":1432,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.8,1670.3 159.8,547.1 133.2,305.1 115.3,70.7 1101.9,109.2 1137.0,497.7 1170.8,497.7 1215.5,1367.4 1222.8,1448.3 1231.7,1979.6 1118.0,1979.9 1083.0,1980.1 299.8,1981.8 264.8,1670.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1410/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[195.0,1029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63196927257322,39.354896884387415]}},{"type":"Feature","properties":{"resourceCoords":[149.0,560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63218788613716,39.35572607096198]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1411/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1411","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1411/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1411","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.2,1950.8 443.4,1920.0 443.2,1921.1 1359.8,1912.5 1363.7,1818.8 1378.9,1818.6 1379.4,1796.9 1386.8,1463.7 1373.6,1462.7 1373.4,1227.0 1374.1,734.7 1375.5,514.6 1377.4,452.1 1387.5,314.7 1412.8,1.0 1402.5,1.0 1401.0,92.3 246.4,47.6 244.4,66.6 213.4,140.7 185.9,458.2 135.6,454.6 135.6,455.5 152.7,456.8 144.2,893.9 145.0,934.5 130.6,1201.0 73.3,1197.0 72.3,1196.9 89.2,1950.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1411/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6308986540609,39.35754082478027]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62439694401344,39.35843623445058]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62276614249579,39.35125592611289]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62926785254325,39.350360516442585]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1412/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1412","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1412/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1412","type":"ImageService3","width":1432,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"312.0,1659.2 307.5,1743.5 306.9,1750.6 299.1,1749.9 258.4,1746.3 370.1,1891.8 421.4,1897.2 569.0,1864.3 854.0,1918.8 1255.6,1907.5 1260.2,1801.2 1260.9,1786.0 1341.5,1475.3 1332.3,1475.3 1368.3,1305.3 1340.7,1301.8 1361.9,953.0 1326.1,904.7 1346.8,21.0 1332.2,21.2 1328.2,111.7 441.7,118.9 441.9,117.9 99.3,147.2 103.7,353.9 61.1,350.5 1.0,56.9 1.0,180.3 315.4,1659.5 312.0,1659.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1412/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62952109806102,39.35119502736541]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62282370314448,39.35212446652571]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62112517199748,39.34470153108943]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62782256691402,39.343772091929125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1413/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1413","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.07"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1413/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1413","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.8,1773.2 171.2,1772.7 101.6,1777.3 121.7,1623.0 87.9,1124.8 54.8,1031.0 93.4,622.1 41.1,341.3 162.0,91.7 312.2,94.5 311.6,50.0 1114.3,220.3 1287.9,257.1 1287.1,207.9 1302.9,210.8 1412.2,228.0 1402.0,243.4 1357.5,1567.8 1368.4,1567.4 1367.7,1589.1 1338.7,1675.4 1332.7,2037.0 1276.9,2037.0 1275.8,2037.0 1256.2,1816.7 608.2,1790.0 291.6,1774.8 201.8,1773.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1413/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[692.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.632393,39.3565933]}},{"type":"Feature","properties":{"resourceCoords":[105.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6347812,39.3564533]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1416/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1416","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1416/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1416","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.5,204.0 496.4,205.2 496.5,229.5 1192.1,216.8 1188.9,208.0 1404.5,204.8 1361.3,643.7 1396.4,710.6 1436.0,774.0 1436.0,780.2 1436.0,807.8 1376.0,813.9 1337.2,821.3 1303.8,833.1 1346.2,839.6 1391.1,836.6 1375.1,1228.8 1352.4,1259.7 1370.1,1350.2 1353.3,1760.2 1271.0,1774.1 1301.6,1893.2 1175.6,1907.4 998.1,1914.5 854.6,1900.5 713.7,1864.7 581.1,1813.6 572.1,1849.1 421.1,1939.0 398.1,2029.5 345.3,2010.7 274.8,1993.0 280.5,1968.5 74.4,1916.0 50.6,553.9 77.7,262.0 114.6,163.8 238.0,170.0 234.5,204.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1416/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1185.0,219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61737099399473,39.3666329993822]}},{"type":"Feature","properties":{"resourceCoords":[75.0,219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62249604309939,39.36621340431632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1420/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1420","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1420/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1420","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.4,2018.5 276.0,1929.3 276.8,1907.8 299.4,1819.2 282.5,1458.9 163.5,1289.8 191.2,1225.8 169.1,1079.5 200.1,764.3 125.9,98.4 209.2,55.9 583.4,81.8 1034.3,21.2 1188.3,50.4 1215.2,80.0 1336.5,65.5 1344.5,94.2 1406.0,157.5 1414.0,190.4 1420.5,251.0 1381.2,361.7 1408.7,544.6 1404.2,960.5 1360.7,1019.4 1330.9,1888.0 1275.7,1942.5 1169.2,1953.0 1155.4,1954.0 1166.8,1995.0 654.0,2018.3 574.0,2015.0 344.0,2020.0 302.4,2018.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1420/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[279.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6342916184165,39.36455213687492]}},{"type":"Feature","properties":{"resourceCoords":[676.0,87.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6315771472594,39.36875724598701]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1421/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1421","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1421/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1421","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1351.8,124.0 1379.5,1663.8 1347.8,1671.5 695.7,1823.6 664.9,1822.4 465.5,1766.0 434.2,1757.2 325.1,1726.3 204.7,1126.6 288.2,836.1 395.9,469.9 413.4,361.9 420.1,119.3 1349.4,124.0 1351.8,124.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1421/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[786.0,121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6098923,39.3662955]}},{"type":"Feature","properties":{"resourceCoords":[1336.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6117449,39.3653224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1422/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1422","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.03"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1422/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1422","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"155.0,1907.7 81.8,118.7 113.3,118.1 766.5,115.6 948.7,111.0 964.9,110.5 1252.5,890.2 1283.3,990.1 1289.7,991.1 1442.4,1405.2 1435.0,1406.0 1435.0,1426.0 1443.2,1426.9 1444.0,1449.0 1431.0,1449.0 1429.0,1456.8 1419.0,1462.0 1419.0,1486.0 1433.0,1487.0 1433.0,1497.0 1444.0,1499.0 1444.0,1583.0 1426.0,1586.0 1425.0,1636.0 1444.0,1637.0 1444.0,1706.0 1439.8,1706.8 1427.3,1691.5 906.4,1939.2 923.3,1865.7 368.8,1836.2 273.0,1813.6 283.1,1873.5 239.3,1885.2 155.0,1907.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1422/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[519.0,115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099355,39.364603]}},{"type":"Feature","properties":{"resourceCoords":[816.0,115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099555,39.3641441]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1423/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1423","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1423/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1423","type":"ImageService3","width":1437,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"419.8,2023.2 368.0,2020.0 275.4,2020.2 227.3,1377.9 138.7,1394.3 52.9,1391.2 116.5,1359.9 192.1,1336.2 309.9,1310.2 302.1,1243.2 208.7,1126.2 123.5,1001.1 108.0,118.0 456.8,72.3 577.8,72.2 1195.0,261.0 1347.0,915.0 1372.4,1020.0 1381.5,1058.0 1433.4,1050.5 1412.0,1132.7 1375.2,1610.2 1312.2,1594.2 1389.8,1767.9 1067.5,1858.3 859.3,1700.6 722.0,1701.2 419.8,2023.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1423/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1195.0,261.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.613848,39.3664909]}},{"type":"Feature","properties":{"resourceCoords":[1347.0,915.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6135108,39.365316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1424/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1424","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.65"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1424/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1424","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"384.0,1787.0 459.4,2019.3 563.0,2017.0 597.6,2018.5 830.8,1954.7 1230.0,1828.9 1394.1,1766.4 1398.4,1764.8 1341.8,1513.4 1273.3,1261.2 1237.6,1271.2 1257.7,897.8 1351.8,868.4 1444.0,838.4 1397.5,742.9 1267.3,505.0 1444.0,445.5 1444.0,377.5 1363.6,375.2 1383.0,360.2 1255.8,71.7 924.5,162.9 713.0,1.0 569.7,1.0 259.0,329.0 110.7,325.3 112.0,343.5 120.9,470.5 81.5,538.9 138.3,719.6 197.2,1561.1 32.1,1608.2 121.8,1844.5 384.0,1787.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1424/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[384.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.615421,39.360799]}},{"type":"Feature","properties":{"resourceCoords":[296.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.615613,39.3617935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1425/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1425","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1425/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1425","type":"ImageService3","width":1431,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"483.1,1751.9 482.4,1656.7 480.7,1563.1 379.5,1579.1 123.1,1632.3 117.9,1452.4 55.2,1433.3 88.0,1333.3 77.8,1296.5 101.6,1292.8 112.3,1256.8 101.5,879.9 96.5,877.3 98.8,788.0 78.3,78.2 196.2,113.9 579.7,231.2 942.7,336.8 1163.4,401.1 1313.3,1366.9 1285.8,1373.1 1305.5,1530.8 1323.2,1866.2 1075.1,1847.6 823.0,1839.8 822.1,1875.6 483.1,1751.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1425/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[631.0,1524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6128269,39.3622057]}},{"type":"Feature","properties":{"resourceCoords":[391.0,173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099593,39.3633227]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1426/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1426","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1426/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1426","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1165.9,1801.8 1178.7,1693.0 983.8,1682.5 906.2,1699.2 751.9,1766.1 394.6,1821.5 268.4,1837.1 192.5,1788.6 179.9,1519.3 135.8,839.7 110.1,411.1 101.2,226.7 1050.8,244.5 1067.7,210.1 1161.2,1264.5 1163.9,1267.6 1203.5,1340.6 1208.8,1437.7 1191.0,1693.7 1222.2,1695.5 1235.8,1696.3 1165.9,1801.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1426/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[767.0,823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099405,39.3606658]}},{"type":"Feature","properties":{"resourceCoords":[405.0,1560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099266,39.359137]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1427/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1427","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1427/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1427","type":"ImageService3","width":1431,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1937.5 1.0,1971.3 257.9,1946.1 260.5,1970.0 943.8,1887.3 939.8,1878.8 1324.2,1833.7 1327.5,1499.1 1361.8,1095.5 1361.2,1030.6 1324.1,593.0 1297.2,590.7 1403.0,72.2 1336.1,66.5 1233.5,70.4 1006.9,32.5 768.9,54.0 386.0,30.5 151.7,52.0 88.4,89.0 65.9,144.8 26.4,873.5 78.7,1933.4 1.0,1937.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1427/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1062.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61681250991363,39.37329882027381]}},{"type":"Feature","properties":{"resourceCoords":[774.0,1448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61814286306237,39.368234862497]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1428/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1428","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1428/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1428","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"503.4,1923.5 502.8,1938.7 198.7,1845.7 139.0,1845.8 137.8,1512.1 166.7,1109.2 165.2,1044.5 122.3,608.5 95.5,606.5 194.0,88.0 477.1,65.4 685.0,85.5 770.6,118.0 812.0,180.7 945.5,179.3 989.5,127.0 1289.7,116.5 1311.8,94.0 1364.2,145.4 1366.2,341.9 1377.1,342.1 1353.2,835.7 1350.5,836.4 1348.0,1330.0 1346.4,1559.7 1345.0,1803.0 1225.1,1799.7 1171.8,1791.0 990.9,1737.6 847.3,1696.3 551.0,1755.6 531.3,1825.0 503.4,1923.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1428/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[194.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6152121,39.3732334]}},{"type":"Feature","properties":{"resourceCoords":[1345.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6098791,39.3669532]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1429/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1429","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1429/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1429","type":"ImageService3","width":1431,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.1,316.7 169.1,107.2 272.4,110.7 421.6,63.9 790.5,68.7 789.1,53.1 994.7,89.8 990.8,114.2 1061.1,126.5 1114.2,141.2 1104.0,195.2 1077.7,228.7 1062.9,257.6 1049.1,299.6 1025.2,416.1 1018.1,494.8 1021.6,560.1 1032.8,590.0 932.2,1176.7 1009.7,1218.7 1037.9,1334.0 1032.9,1333.8 992.6,1570.4 1006.2,1574.6 1009.0,1723.4 1023.5,1725.3 983.4,1862.7 594.1,1913.8 466.4,1924.8 446.0,1922.8 357.2,1928.2 336.9,1929.5 304.4,1701.2 237.4,1224.4 208.6,1011.0 201.8,950.2 192.7,815.7 173.9,507.3 163.9,508.8 140.1,316.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1429/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[184.0,669.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6244329,39.3578316]}},{"type":"Feature","properties":{"resourceCoords":[867.0,1556.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6210663,39.3546725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1430/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1430","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1430/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1430","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.7,1451.2 115.2,1332.4 36.5,1287.8 151.7,688.4 140.8,657.5 138.5,590.4 147.4,509.9 174.2,390.9 189.3,348.1 205.0,318.7 232.7,284.9 244.2,229.8 262.6,137.5 409.6,39.2 416.8,3.1 552.8,47.4 696.3,75.9 841.3,82.4 1019.4,65.9 1145.3,44.9 1275.2,24.2 1309.9,156.9 1341.3,288.6 1349.7,364.4 1362.0,545.6 1355.0,752.8 1346.8,848.3 1324.9,991.3 1300.9,1113.6 1298.5,1167.1 1335.7,1154.2 1344.5,1149.9 1338.9,1312.8 1325.5,1320.8 1291.1,1512.0 1266.2,1557.4 1257.5,1588.8 1257.0,1652.8 1260.7,1711.9 1284.0,1867.5 1293.8,1964.2 1029.5,1982.4 956.9,1986.2 800.8,1982.4 650.8,1981.3 607.5,1982.9 496.2,1989.3 390.6,1996.9 390.7,1965.0 390.6,1957.1 75.0,1992.2 119.0,1852.1 104.2,1849.8 104.3,1697.2 90.4,1692.6 136.5,1450.9 141.7,1451.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1430/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1370.0,556.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6148548506157,39.35892348086538]}},{"type":"Feature","properties":{"resourceCoords":[714.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61798997517595,39.36046620525593]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1431/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1431","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1431/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1431","type":"ImageService3","width":1431,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.0,1583.3 118.5,1553.0 145.9,1509.9 191.9,1323.8 205.6,1316.9 221.5,1156.9 212.6,1160.5 175.2,1171.0 180.9,1118.4 212.3,999.6 242.9,860.3 257.1,766.8 277.2,563.4 276.6,384.2 273.2,309.2 250.6,177.6 429.2,151.6 628.0,114.9 710.4,94.6 876.4,56.5 952.4,33.1 994.4,133.9 1081.7,337.1 1059.4,340.6 947.8,385.4 657.0,585.8 723.3,792.4 809.4,992.6 854.5,1081.6 875.8,1141.3 926.4,1180.7 972.1,1208.8 1055.0,1241.1 1127.2,1261.6 1266.6,1280.5 1258.6,1359.4 1226.7,1639.1 1167.5,1631.2 943.9,1953.5 931.0,1953.4 745.2,1953.0 729.9,1947.5 706.0,1921.6 683.5,1939.1 680.0,1904.6 431.5,1899.8 237.0,1893.8 242.5,1954.5 119.8,1955.0 116.2,1859.3 103.3,1704.7 103.8,1687.3 103.4,1646.2 108.0,1583.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1431/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[914.0,1941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61118177900525,39.354281904566086]}},{"type":"Feature","properties":{"resourceCoords":[625.0,496.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6133157937373,39.359348220783865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1432/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1432","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1432/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1432","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"870.8,2013.8 623.2,1879.8 502.6,1790.2 370.4,1671.1 304.6,1586.1 237.8,1476.6 240.2,1349.7 218.8,1151.2 199.5,715.4 221.6,281.8 907.8,112.6 1148.5,107.7 1192.7,116.8 1227.3,817.9 1236.0,1095.6 1313.4,1146.8 870.8,2013.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1432/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1022.0,1718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099115,39.3574032]}},{"type":"Feature","properties":{"resourceCoords":[790.0,115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.612119,39.35978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1433/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1433","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.39"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1433/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1433","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"96.3,1990.5 97.4,1899.3 101.0,1878.5 99.3,1747.1 57.9,1028.1 65.8,1028.4 97.5,1030.2 95.6,924.3 95.2,834.9 95.0,812.9 95.8,769.5 104.8,619.8 116.8,464.0 116.9,391.4 112.7,126.4 112.0,79.3 237.2,64.8 237.3,58.6 732.2,75.8 732.3,58.6 753.8,32.5 753.8,29.1 1283.8,51.3 1283.8,45.8 1365.5,58.1 1338.2,700.5 1385.7,1112.6 1358.3,1406.5 1389.8,1611.5 1382.0,1899.8 1415.5,1899.5 1368.2,1939.7 727.0,1969.2 96.2,1998.2 96.3,1990.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1433/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1274.0,98.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61416614703644,39.3497884837629]}},{"type":"Feature","properties":{"resourceCoords":[100.0,1987.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62339981927964,39.35323905007282]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1434/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1434","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.23"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1434/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1434","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1115.3,1956.5 468.6,1842.5 470.2,1861.2 117.7,1815.3 145.6,1252.2 81.8,908.5 146.3,172.2 266.6,169.0 365.9,73.7 682.8,52.2 817.3,132.9 1254.7,183.2 1308.7,90.9 1326.4,752.7 1255.4,1630.8 1269.1,1797.2 1357.7,1888.3 1364.1,1948.0 1146.6,1955.5 1115.3,1956.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1434/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61783835387635,39.34786012024246]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61750896887769,39.3452562067004]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62224916241095,39.34489728013772]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62257854740962,39.34750119367978]}},{"type":"Feature","properties":{"resourceCoords":[1215.0,1953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6221048,39.3453297]}},{"type":"Feature","properties":{"resourceCoords":[1215.0,1953.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6221048,39.3453297]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1435/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1435","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.37"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1435/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1435","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.6,365.9 156.0,75.7 327.3,78.7 1397.2,105.7 1417.4,538.6 1401.9,538.0 1428.0,1255.3 1428.0,1868.2 1412.5,1889.1 1413.8,1920.5 506.8,1934.7 507.2,1946.0 279.5,1983.9 270.1,1842.7 158.4,1859.8 147.1,1498.5 127.6,1037.2 191.1,1026.7 156.2,987.2 201.5,939.9 210.0,910.9 189.4,566.3 177.6,365.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1435/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[77.0,586.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61116129752726,39.35446079259366]}},{"type":"Feature","properties":{"resourceCoords":[1384.0,586.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61097797875276,39.35192051418453]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1436/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1436","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1436/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1436","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.2,1955.8 175.2,1962.5 151.9,1990.8 183.9,1332.6 194.6,559.3 211.3,560.7 212.9,93.8 309.1,101.8 1227.6,173.7 1232.4,174.1 1221.3,1999.6 175.2,1955.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1436/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[797.0,140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6097321,39.3508889]}},{"type":"Feature","properties":{"resourceCoords":[802.0,1490.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.612867,39.350622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1437/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1437","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1437/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1437","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"184.2,1982.1 175.4,176.2 205.8,178.6 1245.2,258.8 1195.5,1223.0 1190.4,1306.5 1247.2,1594.4 1325.5,1599.8 1271.8,1895.6 1115.8,1888.2 1003.0,1974.5 345.7,1979.1 344.9,2004.5 184.2,1982.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1437/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[768.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60964602904639,39.3490238378081]}},{"type":"Feature","properties":{"resourceCoords":[164.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61279283329563,39.34989340332291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1440__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 | 1950 | sanborn03573_035 p1440 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"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":"5788.0"},{"label":"split_canvas_h","value":"8152.0"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1440__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1440","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.9,241.4 78.9,538.0 124.8,1060.8 53.3,1230.4 77.8,1715.5 382.6,1745.8 580.5,1877.7 1262.6,2014.8 1262.2,2023.3 1319.6,2023.8 1328.6,1516.0 1333.9,662.8 1335.8,53.2 368.0,70.0 284.1,70.6 1.0,147.1 1.0,226.0 138.9,241.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1440__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[758.0,579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6109786,39.3471737]}},{"type":"Feature","properties":{"resourceCoords":[1331.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6096019,39.3461529]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1441/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1441","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1441/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1441","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"10.8,1652.2 320.4,1761.5 886.1,1831.4 1309.0,1809.1 1360.9,1753.7 1393.1,1252.6 1283.6,858.2 1396.3,320.2 1336.6,237.2 1034.5,203.9 981.2,1.0 954.6,1.0 1015.6,303.9 205.6,238.2 133.3,217.8 118.7,213.6 69.9,984.0 58.6,982.9 73.8,1020.7 10.8,1652.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1441/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[66.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6081010688948,39.34347383320359]}},{"type":"Feature","properties":{"resourceCoords":[21.0,1738.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60969598440482,39.34341854490995]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1442/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1442","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1442/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1442","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.6,1334.9 188.0,1175.6 240.4,1021.5 1078.8,205.4 1157.3,233.9 1149.5,160.9 1234.7,135.1 1239.6,149.2 1206.6,535.5 1296.6,1389.0 1270.8,1385.2 1285.3,1690.2 510.9,1509.0 444.1,1478.7 130.6,1334.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1442/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6031337713608,39.344980360951794]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60227153003515,39.34244260605572]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60686086131062,39.34149680368662]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60772310263627,39.34403455858269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1443/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1443","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1443/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1443","type":"ImageService3","width":1429,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"222.6,66.7 754.0,83.4 1088.0,88.0 1080.2,645.5 1074.1,1194.6 1130.2,1603.1 1175.6,1912.2 1143.2,1935.4 544.5,2019.3 529.8,2019.0 533.3,1984.2 412.1,1857.8 363.6,1431.0 362.0,1416.4 418.5,1408.1 349.0,907.0 222.6,66.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1443/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[349.0,907.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6095856,39.3455048]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6076144,39.346808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1444/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1444","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1444/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1444","type":"ImageService3","width":1447,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1126.9,1491.8 957.9,1497.0 940.8,1828.2 191.6,1952.8 190.1,1941.8 147.7,1629.8 95.7,1217.6 107.7,664.4 121.7,102.8 910.2,139.2 1249.5,156.2 1341.6,563.1 1294.0,1483.6 1126.9,1491.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1444/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[748.0,504.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60627418513722,39.345955514470326]}},{"type":"Feature","properties":{"resourceCoords":[1324.0,951.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60506316985831,39.345031778722294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1445/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1445","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1445/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1445","type":"ImageService3","width":1433,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"196.0,1282.1 62.5,253.3 58.1,218.4 494.3,154.7 611.1,144.1 802.2,147.8 892.7,150.9 1224.5,149.6 1291.8,149.1 1251.9,806.4 1269.0,806.6 1265.8,1424.0 1150.0,1420.0 1138.8,1918.8 806.1,1908.2 276.8,1881.7 196.0,1282.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1445/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[900.0,152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60771279205976,39.35005934854589]}},{"type":"Feature","properties":{"resourceCoords":[1315.0,152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60673986859348,39.34997552768646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1446/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1446","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1446/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1446","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"923.7,1977.3 132.0,1940.0 139.9,1433.5 257.6,1436.7 256.7,809.9 239.2,809.9 275.4,142.3 294.0,142.1 881.0,150.0 1248.5,159.9 1247.4,433.9 1250.5,1364.7 1252.8,1528.5 1312.3,1539.9 1286.8,1995.8 923.7,1977.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1446/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[881.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.605398,39.349844]}},{"type":"Feature","properties":{"resourceCoords":[132.0,1940.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6076144,39.346808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1447/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1447","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1447/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1447","type":"ImageService3","width":1433,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"309.6,668.0 303.2,550.5 254.9,110.9 1165.4,16.8 1170.7,76.3 1086.8,1424.8 1061.1,1858.6 402.4,1957.6 247.1,1947.8 279.6,1368.6 282.1,1282.7 292.6,950.0 299.0,859.5 309.6,668.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1447/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[282.0,1386.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60670913986813,39.34998400892419]}},{"type":"Feature","properties":{"resourceCoords":[658.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60971457343601,39.35084459566184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1448/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1448","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1448/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1448","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"231.9,193.6 1369.7,6.5 1384.3,179.9 1385.0,445.3 1375.5,595.6 1345.8,804.6 1327.8,874.3 1302.7,1081.2 1237.0,1475.5 1184.5,1879.6 1137.1,1872.0 596.9,1877.7 598.7,1925.5 138.3,1924.5 138.9,1627.9 145.3,268.0 136.6,208.5 231.9,193.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1448/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[141.0,1636.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60645656859414,39.35143986813389]}},{"type":"Feature","properties":{"resourceCoords":[1230.0,1466.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60651407909809,39.353430665123746]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1449/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1449","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1449/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1449","type":"ImageService3","width":1433,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"814.4,1814.1 108.6,1693.9 108.3,1644.5 111.0,680.0 219.8,609.1 523.0,398.4 634.7,268.0 698.5,217.9 882.0,140.4 1270.4,1248.9 1344.4,1244.8 1338.2,1430.5 1266.7,1514.1 1253.7,1635.7 1170.8,1626.0 995.7,1830.5 813.0,1826.0 814.4,1814.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1449/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6082402,39.3564849]}},{"type":"Feature","properties":{"resourceCoords":[111.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099225,39.3585617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1450/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1450","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1450/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1450","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"498.2,1574.8 194.8,1657.5 9.6,1704.9 281.8,965.9 400.9,951.6 322.0,391.9 305.4,284.0 1030.0,300.4 1030.3,312.5 1050.6,949.6 1164.0,949.5 1381.4,1385.0 1400.9,1796.0 1331.0,1778.1 1121.2,1749.2 970.5,1740.2 704.2,1741.8 530.4,1757.1 498.2,1574.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1450/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1382.0,1408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6077752,39.354444]}},{"type":"Feature","properties":{"resourceCoords":[471.0,1408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6098776,39.3546668]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1451/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1451","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1451/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1451","type":"ImageService3","width":1433,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1216.8,1834.0 1098.9,1868.2 891.4,1956.1 869.7,1965.3 840.8,1918.1 760.3,1723.3 710.8,1635.8 640.5,1586.4 636.6,1584.8 64.8,650.9 64.0,459.4 62.0,79.5 251.9,76.3 1355.9,84.4 1354.2,370.4 1356.4,941.2 1353.5,1270.5 1352.7,1820.0 1216.8,1834.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1451/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[67.0,847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60994666424905,39.361583920305065]}},{"type":"Feature","properties":{"resourceCoords":[67.0,1575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60994204249927,39.360273542507294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1452/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1452","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1452/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1452","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.9,77.3 86.2,359.4 76.0,922.1 66.0,1246.6 53.4,1788.3 53.9,1837.8 535.6,1975.4 533.6,1959.7 1444.0,2006.9 1444.0,1982.4 1391.3,1989.3 1416.3,371.1 1362.5,155.4 1444.0,152.7 1444.0,132.8 766.0,66.7 678.4,1.0 608.6,1.0 569.0,35.9 491.5,69.0 431.0,82.3 222.5,87.6 93.9,77.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1452/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6071771,39.3630999]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6037665,39.3631647]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6036483,39.359445599999994]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6070589,39.3593808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1453__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 | 1950 | sanborn03573_035 p1453 [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":"5720.0"},{"label":"split_canvas_h","value":"8152.0"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1453__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1453","type":"ImageService3","width":1430,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"279.8,713.2 288.9,806.8 258.6,853.5 258.6,857.9 260.1,915.4 217.8,916.0 143.6,1030.3 51.5,1040.1 57.0,1358.8 113.7,1359.6 219.1,1579.0 225.8,1784.6 329.4,1798.4 526.8,1833.5 729.3,1862.1 916.4,1890.3 1137.4,1925.5 1228.8,1925.5 1378.5,1929.6 1369.8,1375.5 1373.1,1324.4 1376.6,1293.0 1392.7,1233.1 1422.8,1173.5 1345.4,1122.9 1365.2,875.2 1408.7,818.6 1421.8,795.2 1422.7,793.7 1429.0,777.8 1429.0,755.8 1429.0,728.2 1309.8,242.7 1234.2,179.4 1136.5,104.8 1100.2,80.9 1088.2,74.1 1049.8,52.4 1016.7,51.3 926.4,76.9 927.7,89.3 467.7,132.8 469.9,140.5 218.2,107.0 214.3,82.2 147.8,97.5 91.4,121.8 1.0,174.1 1.0,242.1 242.8,720.1 279.8,713.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1453__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[701.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60519988731457,39.35643805290706]}},{"type":"Feature","properties":{"resourceCoords":[916.0,1881.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60471738151521,39.353101432197555]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1454/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1454","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1454/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1454","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"298.8,249.6 274.9,213.4 239.7,167.4 340.1,214.6 432.6,124.5 631.3,57.6 709.3,84.2 767.5,179.0 867.0,239.1 1081.1,293.5 1140.4,263.9 1183.4,182.9 1249.3,170.9 1309.7,110.5 1347.7,234.6 1444.0,253.5 1444.0,272.4 1422.5,335.7 1402.8,410.4 1444.0,466.1 1444.0,586.0 1430.0,587.0 1430.0,606.0 1444.0,607.0 1444.0,760.0 1435.0,761.0 1435.0,777.0 1444.0,778.0 1444.0,1200.0 1432.0,1201.0 1433.0,1249.0 1444.0,1250.0 1444.0,1746.0 1343.2,1961.7 1332.0,2022.4 1160.7,2021.4 908.0,1819.6 911.6,1816.7 37.5,1462.1 52.5,1435.7 90.8,1387.0 141.8,1344.1 90.6,1267.2 206.2,1047.5 268.4,1012.5 291.1,995.1 303.1,983.0 322.6,937.4 403.9,444.5 359.3,356.6 298.8,249.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1454/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6043581,39.3599193]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5978901,39.3613724]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5952395,39.354318899999996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2038.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6017075,39.3528658]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1455/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1455","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.10"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1455/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1455","type":"ImageService3","width":1430,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"672.0,1984.0 264.8,1924.8 127.9,1753.0 104.7,1665.1 168.6,1315.0 127.6,920.5 151.6,747.2 120.2,571.5 139.9,415.8 115.2,379.9 164.7,224.1 440.9,254.8 645.2,107.2 945.1,132.6 1124.3,87.2 1311.6,84.7 1362.5,332.4 1308.2,614.0 1318.3,754.6 1393.1,775.1 1292.5,978.9 1281.1,984.2 1271.9,1118.0 1271.3,1118.1 1257.9,1123.5 1220.9,1316.7 1260.7,1401.5 1225.0,1673.2 1074.8,1745.0 962.2,1796.2 895.9,1831.9 673.1,1997.8 672.0,1984.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1455/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[948.0,1304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5830802,39.3634568]}},{"type":"Feature","properties":{"resourceCoords":[568.0,1506.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5844617,39.3646501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1458/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1458","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1458/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1458","type":"ImageService3","width":1445,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"756.0,1971.3 393.4,1965.4 395.0,1810.0 261.3,1158.6 121.7,1157.7 124.6,701.1 77.1,702.6 73.7,166.8 81.5,119.8 451.9,172.9 889.5,239.5 1070.4,238.2 1366.6,244.2 1375.2,1153.8 1371.6,1408.2 1382.0,1970.9 756.0,1971.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1458/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[749.0,1960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60456582531707,39.34977083527498]}},{"type":"Feature","properties":{"resourceCoords":[458.0,688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6048620849294,39.35213626083876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1459/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1459","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1459/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1459","type":"ImageService3","width":1430,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"135.1,1566.0 136.6,1437.3 131.0,977.0 116.9,422.6 119.7,371.5 119.8,370.1 1064.2,343.4 1062.0,347.5 1429.0,445.1 1410.2,455.2 1401.7,456.3 1425.2,681.3 1381.8,686.4 1367.3,903.5 1380.0,900.4 1390.3,1117.8 1389.0,1117.9 1382.1,1322.0 1379.1,1322.2 1387.0,1477.2 1382.8,1478.8 1376.9,1771.8 1369.9,1774.9 1408.7,1875.7 1063.3,1970.7 1067.0,1801.3 1011.9,1802.2 1013.1,1914.0 324.6,1898.4 173.3,1894.0 148.2,1887.8 141.1,1850.7 135.1,1566.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1459/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[131.0,977.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.602606,39.352726]}},{"type":"Feature","properties":{"resourceCoords":[395.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6019488,39.3493084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1460/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1460","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1460/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1460","type":"ImageService3","width":1449,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"24.2,622.6 16.0,624.4 56.1,844.3 13.7,852.6 15.8,1067.7 28.1,1063.7 54.7,1277.2 53.4,1277.3 62.0,1479.1 59.1,1479.4 78.6,1631.7 74.6,1633.5 90.9,1922.7 84.2,1926.3 130.1,2022.7 284.1,1967.5 319.2,2024.1 332.2,2024.5 344.9,2005.5 386.4,1958.6 429.4,1922.5 1167.0,1671.8 1274.7,1672.7 1274.1,1705.2 1324.0,1575.5 1373.8,1038.7 1342.7,909.0 1336.0,319.8 1349.6,317.3 1351.2,243.6 1348.5,195.8 1194.2,31.2 1141.4,75.9 1065.7,162.6 1044.1,144.6 859.8,299.7 887.1,335.8 761.6,407.0 652.0,450.0 574.1,471.1 413.5,78.2 399.4,82.2 322.6,64.2 315.6,38.7 300.1,34.6 308.6,16.9 284.7,12.1 297.2,58.2 116.6,15.7 113.5,11.3 49.0,9.0 48.1,1.0 1.0,1.0 1.0,28.4 106.7,226.4 119.2,464.1 137.7,522.2 1.0,594.2 1.0,595.5 13.6,606.0 55.0,613.7 24.2,622.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1460/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[652.0,450.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.593326,39.354131]}},{"type":"Feature","properties":{"resourceCoords":[124.0,1268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5965524,39.3516124]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1461/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1461","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1461/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1461","type":"ImageService3","width":1430,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"100.6,191.2 539.5,195.1 534.3,132.7 629.7,132.7 647.4,193.4 949.1,106.8 1100.2,150.8 1153.4,137.4 1174.4,137.6 1213.9,168.7 1262.9,150.8 1283.4,176.5 1188.6,445.9 1152.5,514.4 1085.9,622.8 999.0,770.2 1124.5,1022.5 1207.1,1072.0 1286.4,1258.1 1278.0,1270.3 1277.7,1270.8 1346.6,1390.2 1340.0,1401.3 1371.1,1632.9 1312.3,1652.6 1303.7,1759.0 1260.2,1794.5 1042.6,1681.6 967.5,1644.6 916.1,1624.7 837.9,1604.8 753.0,1589.0 752.1,1598.4 328.6,1625.9 333.9,1659.0 32.6,1674.1 36.6,1650.8 37.3,1643.0 80.6,1627.1 66.3,850.5 109.2,338.8 69.1,191.2 100.6,191.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1461/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[727.0,789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5848417,39.3611796]}},{"type":"Feature","properties":{"resourceCoords":[753.0,1589.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.581283,39.360273]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1466/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1466","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1466/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1466","type":"ImageService3","width":1449,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"732.6,1896.8 801.7,1837.0 1024.4,1792.6 1074.5,1902.6 1287.9,1874.2 1320.0,1829.4 1363.2,1485.5 1316.6,1173.8 1307.3,1173.7 1329.5,581.9 1294.0,582.1 1295.0,373.5 1337.3,372.7 1351.2,1.0 1296.7,1.0 1296.2,110.7 614.9,84.5 465.1,77.8 440.4,71.3 434.0,34.5 120.4,30.5 119.6,165.9 120.0,625.9 120.9,706.8 150.3,712.6 137.2,937.8 126.0,937.2 171.1,1139.3 145.9,1596.0 143.6,1596.2 671.9,1837.2 673.0,1878.9 705.2,1862.0 732.6,1896.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1466/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[879.0,1166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60162352736774,39.34533082162603]}},{"type":"Feature","properties":{"resourceCoords":[1021.0,102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60038535439064,39.349114310314405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1467/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1467","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1467/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1467","type":"ImageService3","width":1435,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.7,1429.2 77.5,1086.7 109.8,1041.0 108.9,1007.1 90.3,987.1 72.5,948.5 65.0,918.2 59.4,813.2 62.8,748.3 63.5,199.8 61.4,105.4 261.8,106.0 330.1,106.0 407.9,106.4 686.6,113.9 701.3,114.0 1162.4,119.9 1406.7,123.0 1402.2,383.8 1361.9,383.4 1354.6,1212.9 1371.5,1226.6 1333.8,1556.5 1322.0,1545.0 1321.8,1900.3 1333.8,1979.3 1026.3,1999.7 579.1,1926.7 507.6,1692.3 194.8,1678.4 113.0,1712.2 53.0,1582.0 43.7,1429.5 53.7,1429.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1467/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[934.0,1282.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60443772400707,39.366112637502454]}},{"type":"Feature","properties":{"resourceCoords":[1394.0,119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60987983693498,39.367792113231324]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1470/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1470","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1470/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1470","type":"ImageService3","width":1449,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1399.3,1541.9 1385.0,1534.9 1297.9,1893.3 1292.1,1904.8 1238.0,1893.1 785.1,1897.2 783.5,1904.1 656.6,2023.1 539.0,2022.0 394.0,2028.0 95.4,2023.3 56.0,1983.6 64.6,1906.5 77.3,1837.4 80.3,1822.1 103.6,1823.2 176.5,1294.8 105.0,1235.6 123.2,828.5 237.4,825.3 298.5,602.4 114.3,535.3 73.7,252.8 104.3,112.9 483.4,169.0 689.9,129.2 1151.3,192.8 1319.9,125.0 1311.2,188.3 1362.5,256.1 1339.2,920.4 1386.3,1101.3 1401.7,1429.6 1428.5,1430.5 1399.3,1541.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1470/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[372.0,996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59671746108971,39.3635773639131]}},{"type":"Feature","properties":{"resourceCoords":[1311.0,1845.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59185892334534,39.36101803727386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1471/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1471","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1471/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1471","type":"ImageService3","width":1434,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1313.2,86.6 1313.0,174.8 1311.5,939.6 1311.7,1262.8 1301.9,1286.0 1297.5,1324.6 1297.8,1435.2 1294.5,1637.8 1295.4,1664.2 1324.5,1676.3 1324.0,1870.2 1330.5,1870.3 1272.8,1951.4 1116.1,1980.5 477.1,1969.3 276.6,1997.4 150.7,1913.5 180.4,1844.5 110.4,1707.0 95.7,1386.2 132.3,1139.9 107.5,1028.4 130.8,993.5 131.1,668.4 76.7,240.3 119.0,94.8 188.9,111.0 479.4,66.0 618.9,90.2 817.7,180.1 1251.8,113.5 1312.6,78.7 1313.2,86.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1471/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1298.0,1644.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57592737159611,39.354937896552435]}},{"type":"Feature","properties":{"resourceCoords":[1303.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58210517098979,39.357692958971946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1472/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1472","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1472/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1472","type":"ImageService3","width":1449,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.2,283.0 442.6,219.7 432.1,187.9 844.9,92.6 844.3,83.2 930.5,85.0 1010.8,92.0 1064.7,103.4 1144.5,127.8 1377.1,203.9 1346.3,238.7 1340.5,728.8 1292.1,931.1 1338.7,1438.6 1320.2,1671.1 1282.5,1786.2 1205.1,1838.4 1172.1,1946.6 1103.2,1968.3 878.2,1932.8 302.1,1941.1 146.4,2024.5 148.3,1832.7 119.6,1820.5 119.0,1794.3 123.6,1593.9 124.1,1484.5 128.8,1446.2 138.6,1423.4 140.7,1103.5 147.6,346.7 148.2,283.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1472/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[343.0,1634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57610011327473,39.3559310751899]}},{"type":"Feature","properties":{"resourceCoords":[349.0,536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58057227371208,39.35790289991873]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1473/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1473","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1473/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1473","type":"ImageService3","width":1432,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.8,132.8 147.8,139.8 16.0,284.4 16.0,350.0 21.0,355.0 18.0,450.0 13.0,453.0 17.0,459.0 17.0,486.0 1.0,488.8 1.0,509.1 16.0,510.0 16.0,543.0 1.0,544.0 1.0,566.0 20.0,567.0 20.0,591.0 12.0,593.0 8.0,606.0 1.0,606.0 1.0,606.5 19.0,615.0 19.0,666.0 1.0,666.0 1.0,688.1 14.0,689.0 15.0,699.0 20.0,700.0 20.0,723.0 1.0,724.9 1.0,746.0 21.0,747.0 21.0,777.0 13.0,778.0 8.0,790.0 1.0,790.0 1.0,794.0 9.0,794.0 10.0,800.0 21.0,801.0 19.0,851.0 1.0,850.0 1.0,872.1 10.0,873.0 10.0,893.0 1.0,893.9 1.0,950.1 10.0,951.0 10.0,980.0 1.0,983.6 1.0,989.0 8.0,989.0 11.0,1018.0 8.0,1023.0 1.0,1023.0 1.0,1063.2 22.0,1067.0 22.0,1095.0 1.0,1097.9 1.0,1117.0 21.0,1117.0 23.0,1146.0 12.0,1147.0 8.0,1156.0 1.0,1156.0 1.0,1163.1 10.0,1164.0 10.0,1182.0 1.0,1182.9 1.0,1187.0 9.0,1187.0 10.0,1195.0 23.0,1196.0 23.0,1223.0 11.0,1224.0 10.0,1243.0 1.0,1244.8 1.0,1245.1 10.0,1246.0 10.0,1264.0 24.0,1266.0 23.0,1286.0 1.0,1287.0 1.0,1307.0 24.0,1308.0 23.0,1343.0 1.0,1344.0 1.0,1373.1 10.0,1374.0 10.0,1378.9 22.0,1386.0 22.0,1409.0 9.0,1424.0 23.0,1432.0 23.0,1458.5 92.7,1496.4 107.5,1496.2 159.3,1919.6 240.4,1919.8 358.1,1907.0 498.6,1871.2 481.6,1829.0 701.3,1727.3 717.5,1750.4 813.8,1686.3 876.8,1657.0 983.0,1857.5 972.9,1904.5 951.9,1975.5 1194.1,1996.8 1303.4,1977.0 1374.7,1843.2 1335.0,930.8 1162.3,887.1 1175.2,731.2 1329.9,445.6 1352.6,448.9 1365.0,420.0 1319.2,395.9 888.2,187.2 833.8,159.1 780.1,137.4 685.2,108.3 650.4,101.0 596.1,93.6 148.8,132.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1473/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[841.0,1268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5906958,39.3566158]}},{"type":"Feature","properties":{"resourceCoords":[231.0,397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5937884,39.3596364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1474/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1474","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1474/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1474","type":"ImageService3","width":1455,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"376.0,111.4 867.4,108.8 868.1,111.5 1359.7,130.3 1352.2,1378.5 1332.8,1515.5 1255.8,1542.9 1258.7,1683.2 1303.3,1697.0 1183.2,1780.7 1046.7,1787.2 948.8,1874.1 600.3,1988.3 152.7,1949.4 106.9,1953.3 93.7,1875.1 87.8,1523.0 99.7,1534.2 131.4,1206.5 114.4,1193.3 107.4,371.0 147.4,370.7 147.3,112.2 376.0,111.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1474/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[508.0,111.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60983146130557,39.36915559639882]}},{"type":"Feature","properties":{"resourceCoords":[173.0,1257.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60444842641397,39.36784622203468]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1475/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1475","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.28"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1475/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1475","type":"ImageService3","width":1428,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"252.4,194.5 898.0,195.0 1169.2,203.2 1310.2,213.5 1363.2,277.5 1278.8,311.8 1165.2,666.1 1168.7,909.0 1289.7,903.5 1280.0,1094.5 1248.9,1158.7 1098.7,1175.0 1033.2,1341.7 1014.9,1594.5 1215.1,1618.4 1189.5,1803.5 942.3,1906.3 341.6,1903.0 256.5,1608.2 257.7,566.8 242.0,492.5 164.5,478.1 133.6,193.0 252.4,194.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1475/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[898.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5919982,39.3477899]}},{"type":"Feature","properties":{"resourceCoords":[464.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5921061,39.3470195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1476/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1476","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1476/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1476","type":"ImageService3","width":1457,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"293.1,1702.9 343.7,738.2 353.4,615.2 351.6,498.5 331.4,299.2 317.7,228.8 343.4,228.5 1059.9,54.5 1060.6,86.3 1285.2,35.9 1358.7,192.3 1306.4,585.1 1356.0,1356.2 1294.4,1497.5 1351.4,1700.8 1159.2,1698.6 1168.3,1824.6 284.0,1807.0 293.1,1702.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1476/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1163.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5890954899487,39.361637578265835]}},{"type":"Feature","properties":{"resourceCoords":[324.0,1749.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58857343150288,39.35989645424149]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1477/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_035 p1477","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T17:28:06Z","modified":"2026-10-18T17:28:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1477/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1477","type":"ImageService3","width":1428,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.4,1890.5 1024.0,1899.4 455.9,1724.9 446.9,1759.3 245.0,1704.5 255.1,1663.2 58.2,1602.8 62.4,1082.6 128.1,1069.1 133.0,1057.0 119.4,1038.5 89.6,983.0 70.5,930.0 90.3,147.3 128.5,46.0 158.9,57.8 167.3,65.2 311.0,86.2 320.2,85.0 337.6,122.0 403.6,144.4 531.9,181.8 839.8,261.7 896.3,277.1 919.8,322.1 1056.1,342.1 1036.2,606.4 1088.2,662.9 1104.2,887.2 1170.8,1100.2 1178.4,1357.2 1296.4,1476.1 1327.0,1601.0 1314.9,1915.3 1340.7,1925.8 1026.4,1890.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195014:03573_14_1950-1477/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[706.0,1063.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5959655361163,39.34670307450616]}},{"type":"Feature","properties":{"resourceCoords":[864.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59197319354456,39.346576602864666]}}]}}]}