{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01227_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Washington, District-Of-Columbia | 1903 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"132"},{"label":"placed","value":"106"},{"label":"unplaced","value":"26"},{"label":"fit sources","value":"georef-snap 74, georef 31, snap:0 2, georef-street 1, snap:2 1, streets-candidate 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p11 (tier 2, 38.90100,-77.03972 +/-2921m); p111__1 (tier 1, 38.90643,-77.07439 +/-103m); p111__2 (tier 1, 38.90849,-77.07479 +/-100m); p111__3 (tier 1, 38.91030,-77.07668 +/-107m); p111__4 (tier 1, 38.90846,-77.07430 +/-100m); p1a (tier 1, 38.88400,-77.03070 +/-299m); p1c (tier 3, 38.88843,-77.03158 +/-1234m); p1d (tier 1, 38.90013,-77.03048 +/-296m); p1e__1 (tier 1, 38.90000,-77.02964 +/-288m); p1e__2 (tier 1, 38.89888,-77.03231 +/-124m); p3 (tier 2, 38.88290,-77.02385 +/-100m); p4 (tier 1, 38.88617,-77.02612 +/-297m); p51 (tier 1, 38.89888,-77.05368 +/-288m); p62__2 (tier 1, 38.91051,-77.06969 +/-116m); p64__2 (tier 1, 38.91526,-77.06942 +/-100m); p6__1 (tier 1, 38.93737,-77.02591 +/-218m); p6__2 (tier 1, 38.89472,-77.05462 +/-111m); p6__3 (tier 1, 38.92223,-77.07173 +/-106m); p6__5 (tier 1, 38.89347,-77.05493 +/-100m); p7 (tier 1, 38.89425,-77.03086 +/-307m); p72__2 (tier 1, 38.91060,-77.05230 +/-100m); p7s (tier 1, 38.89498,-77.03085 +/-304m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000100","type":"ImageService3","width":1437,"height":2056},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"309.8,263.5 737.6,267.0 784.3,265.8 1347.9,263.9 1349.0,650.2 1346.3,1685.1 1314.2,1757.7 1225.2,1800.8 181.5,1745.2 166.4,1757.8 161.3,1757.8 159.6,1031.4 158.0,1031.4 204.8,647.5 174.8,646.7 274.2,365.1 276.3,261.5 309.8,263.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[261.0,273.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02808812207988,38.89500939682906]}},{"type":"Feature","properties":{"resourceCoords":[-295.0,1754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02398190837866,38.89380747665331]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001000","type":"ImageService3","width":1432,"height":2074},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.1,95.3 1431.0,96.1 1425.2,128.6 1352.2,158.0 1390.3,546.5 1351.9,605.0 1404.3,812.5 1355.2,1021.0 1393.2,1132.3 1361.8,1519.2 1405.4,1914.5 1431.0,1920.7 1431.0,1947.9 1305.3,1992.9 1290.6,1964.5 615.2,2004.5 604.8,2011.5 408.5,2017.1 152.4,2019.3 152.6,1853.1 153.2,215.7 153.1,95.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001000/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02366109811057,38.92909463882957]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0197451260618,38.92944453746791]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2074.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.01909827273828,38.92500121850698]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2074.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02301424478703,38.92465131986863]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p101","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001010","type":"ImageService3","width":1440,"height":2075},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1237.1,1993.4 1233.4,675.9 1218.2,650.8 1210.8,595.1 1216.0,534.8 1234.6,482.9 1236.3,369.4 1230.0,104.5 1176.6,92.9 286.6,101.4 310.1,1.0 205.9,1.0 185.4,27.2 159.6,87.0 152.6,154.0 160.8,603.9 157.9,1061.6 126.5,1062.0 127.2,1512.7 157.3,1512.6 157.3,1529.3 162.0,1975.5 1180.9,1972.3 1237.1,1993.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02723403225207,38.93304103224914]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02327483311016,38.93338263489703]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,2075.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0226464883588,38.928913311291765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2075.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0266056875007,38.92857170864388]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p102","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001020","type":"ImageService3","width":1435,"height":2071},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.1,1963.1 114.2,1927.8 115.8,609.0 100.7,583.8 93.5,528.1 98.9,467.7 117.8,415.9 119.9,302.3 114.7,37.0 239.9,64.5 536.5,10.6 1200.0,61.3 1239.5,103.4 1376.0,68.8 1334.5,321.2 1401.4,786.7 1411.2,1916.8 1391.2,1981.4 114.1,1980.5 114.1,1963.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02414708907489,38.933159359343925]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02020721748671,38.93351182343075]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,2071.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.01955788723613,38.92905743896151]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2071.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0234977588243,38.928704974874684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p103","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001030","type":"ImageService3","width":1442,"height":2076},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"500.1,1898.0 231.7,1915.2 198.2,1519.0 156.4,962.4 155.0,877.8 155.9,538.8 155.6,494.6 816.8,333.4 816.7,339.1 989.4,261.6 1235.2,399.3 1235.3,403.1 1235.6,441.2 1239.5,943.6 1247.8,1853.2 500.1,1898.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1238.0,921.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02971250472602,38.92965726841481]}},{"type":"Feature","properties":{"resourceCoords":[265.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03244550449142,38.927579369130335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001040","type":"ImageService3","width":1444,"height":2075},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"82.6,1481.0 147.5,570.2 184.0,67.2 401.9,84.9 976.1,126.1 1316.7,108.5 1334.2,560.5 1364.2,559.3 1364.8,576.0 1386.0,1023.4 1405.7,1445.3 1390.7,1483.7 1393.8,1597.5 1410.9,1940.3 1156.2,1950.3 958.5,1960.7 399.9,1921.4 52.8,1894.5 82.6,1481.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[104.0,569.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02982946870456,38.9296041188283]}},{"type":"Feature","properties":{"resourceCoords":[104.0,1934.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02955752515807,38.926664999567436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p105","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001050","type":"ImageService3","width":1437,"height":2069},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1332.0,1806.7 1330.8,1597.4 1327.8,1171.9 1323.2,1020.8 1319.2,428.7 1317.5,28.0 1311.6,1.0 1310.8,1.0 1292.4,30.4 263.2,122.2 233.8,82.3 234.7,270.7 48.9,261.8 165.8,426.9 235.5,483.4 239.6,1244.8 238.2,1311.9 242.3,1819.3 242.6,1897.8 910.2,1738.9 910.1,1744.6 1084.6,1667.7 1332.0,1806.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03336483585396,38.934708805182154]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02939641716506,38.934695300708775]}},{"type":"Feature","properties":{"resourceCoords":[1437.0,2069.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02942123774449,38.93021929461773]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2069.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03338965643339,38.93023279909111]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001060","type":"ImageService3","width":1433,"height":2062},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.4,1729.0 118.3,1302.3 114.3,1150.8 112.8,557.0 113.0,155.2 119.2,107.5 364.8,45.0 711.0,95.0 805.4,38.8 1151.6,26.2 1340.5,107.5 1372.0,495.2 1351.5,664.8 1332.3,697.3 1346.4,706.4 1327.8,860.3 1224.4,871.7 1206.2,901.2 1186.9,963.8 1187.3,1031.4 1245.0,1479.7 1292.4,1936.9 1261.1,1940.8 920.0,1982.8 340.0,1982.9 119.7,1980.9 119.7,1942.5 119.4,1729.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0300378267153,38.93497069773379]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02609129685203,38.93497073001103]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02609123756397,38.930522066777684]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03003776742725,38.93052203450044]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p107","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001070","type":"ImageService3","width":1449,"height":2080},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"371.9,50.6 413.8,127.0 433.7,43.0 463.7,55.2 1270.0,449.0 1403.4,515.4 1448.0,536.8 1442.6,565.7 1358.6,735.9 1318.9,1707.0 1371.8,1827.8 1270.1,1824.9 1269.8,2007.8 120.2,1961.0 62.2,1136.2 98.8,711.1 35.9,467.6 65.6,248.7 371.9,50.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[410.0,1363.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.038853,38.929688]}},{"type":"Feature","properties":{"resourceCoords":[1270.0,449.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0364613,38.9316571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p108","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001080","type":"ImageService3","width":1442,"height":2070},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.4,1331.0 134.7,1333.0 81.4,1214.4 111.9,257.2 193.1,88.7 198.3,77.5 198.2,60.1 199.2,60.6 204.9,63.2 589.5,250.2 821.6,360.8 1356.3,400.2 1357.2,486.3 1357.2,821.6 1358.8,905.4 1401.7,1455.9 1435.9,1847.8 1195.7,1864.3 640.8,1920.6 584.9,1934.9 508.9,1976.8 404.4,2054.8 376.7,2069.0 369.9,2038.9 354.3,1989.4 94.9,1915.4 54.2,1511.8 35.8,1511.2 34.4,1331.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[190.0,55.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03599077063468,38.93147828985775]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.032456064189,38.92738840900358]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p109","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001090","type":"ImageService3","width":1439,"height":2073},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.0,1708.0 42.9,1609.4 16.2,1096.8 31.8,336.9 99.3,231.6 98.9,120.3 598.8,38.1 1111.5,42.3 1154.9,103.9 1297.0,115.7 1297.3,202.2 1384.0,257.4 1360.3,523.2 1374.9,535.2 1357.2,572.0 1291.5,539.3 1277.7,779.2 1356.3,816.9 1312.0,1317.0 1275.6,1299.1 1277.0,2046.0 479.2,1658.1 449.6,1646.1 430.0,1729.2 388.5,1653.7 86.0,1850.1 105.0,1708.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[962.0,623.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03733,38.934767]}},{"type":"Feature","properties":{"resourceCoords":[1277.0,2046.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0364613,38.9316571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p110","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001100","type":"ImageService3","width":1430,"height":2066},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1417.5,1883.5 1415.4,1848.7 1382.9,1351.5 1380.6,1285.7 1333.8,539.7 1262.9,488.1 1139.8,332.8 1321.2,331.2 1309.7,146.6 1287.6,119.8 968.0,108.8 816.5,38.5 598.5,82.5 343.2,18.5 105.7,45.4 82.2,28.2 66.8,65.6 1.0,37.4 1.0,275.5 79.9,307.9 64.7,805.2 27.6,789.6 71.6,1528.3 205.9,1585.5 257.6,1606.6 648.8,1773.0 884.8,1871.1 1417.5,1883.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb001100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[254.0,384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03574635469907,38.93414934805002]}},{"type":"Feature","properties":{"resourceCoords":[65.0,1522.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03647884046194,38.93167202289507]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb00011s/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p11s","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.49"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb00011s/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb00011s","type":"ImageService3","width":1443,"height":2061},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3.2,1402.4 56.5,1601.1 28.6,1953.3 530.9,1952.6 647.5,1956.3 917.8,1957.3 1403.1,1956.8 1403.7,1473.1 1402.8,900.4 1405.0,643.2 1405.5,166.6 1405.7,88.7 591.6,118.3 591.8,164.8 524.0,165.8 1.6,164.9 1.0,376.3 1.0,652.6 36.1,652.2 35.5,1274.3 2.7,1302.1 3.2,1402.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb00011s/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0336425,38.9017017]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0295186,38.9017084]}},{"type":"Feature","properties":{"resourceCoords":[1443.0,2061.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02950630000001,38.8971245]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2061.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0336302,38.8971178]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000120/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000120/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000120","type":"ImageService3","width":1437,"height":2061},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"21.5,1516.1 18.4,1437.0 15.3,1387.5 53.7,1386.8 230.2,881.2 291.3,880.0 557.5,310.6 548.8,289.4 605.0,268.1 615.7,198.6 641.9,161.2 695.7,114.5 730.5,50.7 1230.6,261.7 1269.3,259.4 1353.5,291.2 1385.8,345.2 1412.0,354.9 1436.0,1465.0 1436.0,1483.6 1436.0,1872.8 622.8,1921.1 624.0,1968.1 555.5,1970.6 27.6,1981.9 21.5,1516.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000120/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[614.0,-65.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03185840005037,38.90581058348374]}},{"type":"Feature","properties":{"resourceCoords":[614.0,195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03187375841883,38.90523864645026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000130/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000130/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000130","type":"ImageService3","width":1439,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"784.7,1941.8 241.5,1941.7 240.9,1444.2 238.7,855.2 240.2,590.7 239.6,100.5 294.5,98.8 748.8,99.2 1114.2,96.9 1171.0,92.8 1172.5,235.5 1171.0,853.2 1169.3,1075.5 1168.8,1547.7 1170.3,1940.8 784.7,1941.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000130/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[791.0,805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02809309825571,38.899813884790206]}},{"type":"Feature","properties":{"resourceCoords":[236.0,805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02963529200962,38.89981424499902]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000140/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000140/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000140","type":"ImageService3","width":1429,"height":2053},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1213.2,1943.3 170.4,1941.8 168.4,1547.5 168.3,1074.2 169.7,851.4 170.4,232.1 203.7,217.0 549.8,273.0 549.5,304.9 1277.0,306.8 1341.1,1238.8 1266.7,1920.6 1286.3,1975.4 1213.2,1943.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000140/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02750051834404,38.90154646168762]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0235674641166,38.90154139857446]}},{"type":"Feature","properties":{"resourceCoords":[1429.0,2053.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02357674525406,38.89711286640015]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2053.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0275097994815,38.897117929513314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000150/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p15","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000150/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000150","type":"ImageService3","width":1437,"height":2063},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"303.6,77.3 518.6,175.0 956.6,369.8 1114.5,366.0 1172.4,364.6 1171.5,510.3 1175.0,1165.4 1174.3,1664.8 1117.5,1669.0 753.0,1671.5 299.7,1671.5 244.8,1673.2 244.8,1593.3 237.0,1593.6 244.1,1179.8 242.2,52.5 303.6,77.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000150/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[244.0,1125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0296255,38.9025259]}},{"type":"Feature","properties":{"resourceCoords":[793.0,297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.028094,38.904319]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000160/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p16","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000160/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000160","type":"ImageService3","width":1435,"height":2059},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.1,1179.0 170.5,519.1 171.4,372.4 587.3,370.9 1279.3,307.4 1280.2,368.3 1307.7,368.4 1305.8,396.4 1400.8,1129.9 1278.8,1879.6 1276.7,1900.9 552.4,1898.7 552.7,1866.7 208.2,1810.4 175.0,1825.5 173.4,1682.1 174.1,1179.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000160/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[175.0,1796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0270325,38.9011087]}},{"type":"Feature","properties":{"resourceCoords":[552.0,643.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0259864,38.9035883]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000170/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000170/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000170","type":"ImageService3","width":1426,"height":2053},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.6,621.0 171.9,9.3 573.0,10.7 1038.6,9.2 1282.3,15.3 1281.5,554.5 1324.4,708.9 1293.0,1042.0 1335.8,1325.9 1287.2,2026.4 1260.1,2026.2 1259.3,1966.2 578.3,2026.9 169.0,2027.2 169.6,1347.3 168.6,1304.7 171.5,655.7 171.6,621.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000170/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[174.0,1350.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02702670607187,38.90565193151918]}},{"type":"Feature","properties":{"resourceCoords":[1274.0,1350.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02393635641067,38.90565582777398]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000180/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p18","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000180/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000180","type":"ImageService3","width":1438,"height":2073},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.2,1312.8 162.2,982.9 161.6,103.5 1004.9,103.4 1268.5,102.0 1255.9,129.9 1350.3,542.8 1307.0,893.2 1345.0,1274.9 1289.1,1600.3 1289.6,1973.3 1042.4,1967.9 570.4,1970.7 163.6,1970.6 161.9,1477.3 163.2,1312.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000180/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[543.0,886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0259836,38.9109201]}},{"type":"Feature","properties":{"resourceCoords":[1270.0,559.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0239681,38.911623]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000190/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000190/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000190","type":"ImageService3","width":1435,"height":2055},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.1,489.4 163.0,22.5 704.4,17.2 756.2,15.2 1254.9,11.3 1269.1,12.4 1357.1,1316.8 1314.5,1960.0 1278.3,2025.5 1018.0,2029.3 185.2,2037.1 176.3,1113.2 169.9,672.6 167.1,489.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000190/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1278.0,1004.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02394091839942,38.91483806746485]}},{"type":"Feature","properties":{"resourceCoords":[550.0,1694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02600390866854,38.913348810293456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.59"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000020","type":"ImageService3","width":1450,"height":2063},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.4,353.3 154.3,60.6 800.7,20.9 1383.4,74.0 1340.8,1967.7 1228.2,2022.2 818.2,2034.3 92.7,1979.0 81.4,353.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0337016671054,38.88464953828586]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03376580691382,38.88780006232633]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,2063.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02804756007231,38.88787159591431]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2063.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0279834202639,38.88472107187385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000200/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000200/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000200","type":"ImageService3","width":1446,"height":2078},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"180.5,1453.4 182.8,930.4 183.6,357.8 183.8,291.1 839.8,348.1 835.8,281.1 884.1,275.9 1024.2,260.3 1146.6,234.2 1445.0,203.2 1445.0,233.5 1323.6,246.4 1363.6,1287.5 1294.5,1597.1 1287.1,1967.5 1272.9,1966.1 772.8,1963.0 720.9,1964.3 178.1,1962.1 180.5,1453.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000200/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[553.0,961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02599951816232,38.91918870224682]}},{"type":"Feature","properties":{"resourceCoords":[176.0,961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02705445336751,38.91918602802978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000210/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000210/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000210","type":"ImageService3","width":1427,"height":2050},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"323.7,965.3 378.6,933.1 411.6,848.1 409.6,809.0 627.4,304.8 670.6,313.1 727.4,303.6 767.8,284.4 934.5,201.2 1024.9,166.3 1135.2,149.0 1407.7,145.4 1411.4,200.1 1414.5,425.9 1418.0,924.2 1416.3,1033.0 1424.0,1559.1 1426.0,1905.3 1391.9,1905.6 739.3,1911.8 696.5,1913.5 12.9,1922.4 10.9,1864.7 5.4,1707.4 194.7,1268.7 289.6,1053.3 313.6,991.8 323.7,965.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000210/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[693.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02963582129195,38.90567510532793]}},{"type":"Feature","properties":{"resourceCoords":[693.0,1922.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02701523841539,38.905649978179206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p22","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000220/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000220","type":"ImageService3","width":1441,"height":2072},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.1,1581.9 160.1,1048.2 162.9,938.0 164.8,432.6 164.2,203.4 161.0,148.0 653.9,147.2 1044.6,149.2 1286.5,147.1 1288.9,587.9 1280.8,650.3 1248.9,709.6 1318.9,726.5 1358.2,749.1 1326.7,746.0 1317.5,1239.4 1311.0,1240.3 1279.8,1376.7 1278.5,1583.5 1280.8,1929.6 784.8,1931.3 161.0,1933.0 160.2,1933.0 162.1,1581.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000220/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[161.0,1933.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0270367,38.9072457]}},{"type":"Feature","properties":{"resourceCoords":[161.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.031954,38.9072513]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000230/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000230/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000230","type":"ImageService3","width":1454,"height":2086},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"395.2,156.2 696.6,155.4 1108.5,152.2 1418.2,151.2 1419.9,355.3 1424.8,1584.1 1427.0,1916.8 551.8,1921.1 223.3,1923.4 59.6,1922.8 55.8,1580.4 56.4,1375.7 86.8,1240.7 93.1,1239.7 100.3,751.5 131.4,754.5 92.5,732.2 23.2,715.8 54.5,657.0 62.2,595.2 58.2,158.9 395.2,156.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000230/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1395.0,1614.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02788111021309,38.91254264982429]}},{"type":"Feature","properties":{"resourceCoords":[1395.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0319566899753,38.91255993266745]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000240/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p24","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000240/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000240","type":"ImageService3","width":1451,"height":2072},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.3,1595.7 43.7,362.4 43.3,157.5 776.9,157.3 1077.6,159.2 1423.0,158.1 1420.5,1930.7 974.8,1931.8 40.2,1929.7 40.3,1595.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000240/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[388.0,998.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.029623,38.9133563]}},{"type":"Feature","properties":{"resourceCoords":[388.0,158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0319529,38.913354]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000250/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p25","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000250/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000250","type":"ImageService3","width":1439,"height":2069},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"428.4,147.1 1308.2,147.0 1307.2,394.8 1306.4,1923.0 792.3,1921.8 319.0,1920.5 133.3,1921.2 134.9,145.3 428.4,147.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000250/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[462.0,988.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.029624,38.9162937]}},{"type":"Feature","properties":{"resourceCoords":[462.0,147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0319523,38.9162924]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000260/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p26","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000260/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000260","type":"ImageService3","width":1434,"height":2060},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.7,396.6 121.4,149.6 967.9,149.1 1030.8,158.2 1077.0,343.9 1229.0,971.4 1298.5,1257.4 1305.8,1307.1 1335.5,1721.1 1352.1,1918.8 1307.5,1918.8 1225.5,1918.9 648.6,1920.2 121.7,1919.8 120.7,396.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000260/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[623.0,1920.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0270362,38.9191974]}},{"type":"Feature","properties":{"resourceCoords":[623.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0319524,38.919199]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000270/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000270/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000270","type":"ImageService3","width":1427,"height":2056},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.2,124.4 188.2,124.0 184.7,27.3 217.0,69.9 252.4,98.1 290.6,104.7 498.0,103.7 497.8,73.5 497.7,39.9 1204.0,66.0 1204.1,100.0 1204.9,151.3 1225.3,227.7 1226.7,282.2 1229.3,1208.0 1266.4,1958.0 172.3,1958.2 168.8,1538.7 169.5,708.0 168.0,393.1 143.8,252.0 141.4,103.5 159.2,124.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000270/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[705.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03795728514095,38.90018491019387]}},{"type":"Feature","properties":{"resourceCoords":[175.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03944965300695,38.898776653842646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000280/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000280/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000280","type":"ImageService3","width":1432,"height":2053},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1250.2,1955.2 494.9,1915.3 294.9,1970.8 258.5,1970.5 227.8,1214.8 233.2,282.5 232.4,227.5 212.5,150.4 212.1,98.7 579.3,100.7 879.8,100.3 910.9,101.0 920.6,152.5 1260.9,153.4 1262.2,234.0 1257.0,708.2 1255.0,1210.0 1292.0,1209.7 1290.6,1849.9 1256.9,1878.5 1257.3,1981.8 1250.2,1955.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000280/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[729.0,1208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03509871434684,38.900251099328926]}},{"type":"Feature","properties":{"resourceCoords":[1254.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03363472081867,38.89874192708404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000290/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p29","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.30"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000290/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000290","type":"ImageService3","width":1432,"height":2052},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"770.0,1896.9 92.7,1898.2 83.1,1669.1 56.0,1027.0 40.6,640.1 38.9,594.9 38.6,587.7 695.3,468.0 714.0,552.9 1378.1,351.3 1378.3,354.3 1388.7,578.3 1431.0,1598.1 1431.0,1605.3 1431.0,1774.0 1424.8,1786.5 1428.0,1873.5 1431.0,1900.2 1406.1,1900.8 1120.5,1914.8 771.4,1929.4 770.0,1896.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000290/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[56.0,1027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0385125,38.9047643]}},{"type":"Feature","properties":{"resourceCoords":[733.0,1027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0365388,38.9046961]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000300/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000300/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000300","type":"ImageService3","width":1423,"height":2052},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"226.2,71.8 1012.1,331.6 1055.2,264.8 1086.9,243.3 1162.7,230.0 1229.7,245.3 1293.4,289.8 1312.2,330.3 1321.1,387.1 1312.3,430.2 1276.0,494.0 1220.7,540.3 1193.6,577.6 1181.4,647.6 1124.2,668.1 1132.7,689.7 853.1,1260.3 791.3,1260.4 603.6,1768.2 564.8,1768.2 566.9,1818.3 229.1,1819.5 219.1,1768.4 212.2,1740.3 212.7,1649.5 219.7,1636.7 227.4,1453.4 227.6,388.4 226.5,154.4 226.2,71.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000300/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[232.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03456750584472,38.9025604609987]}},{"type":"Feature","properties":{"resourceCoords":[1171.0,1807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03194139472514,38.9025550106016]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000310/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000310/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000310","type":"ImageService3","width":1425,"height":2044},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.4,1882.3 41.9,1393.5 39.6,1084.2 36.4,954.6 38.4,852.9 34.6,554.1 25.5,122.3 721.3,110.2 1285.2,101.9 1421.5,96.6 1424.0,264.9 1424.0,1689.9 747.1,1874.9 730.2,1786.7 48.6,1891.4 48.4,1882.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000310/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[730.0,1944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03658428999677,38.90562230830347]}},{"type":"Feature","properties":{"resourceCoords":[1392.0,1944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03471465747994,38.905598292604154]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000320/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p32","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000320/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000320","type":"ImageService3","width":1428,"height":2053},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.6,97.5 938.6,98.9 1178.8,97.2 1180.1,338.4 1176.9,727.8 1176.0,1219.0 1175.7,1494.4 1191.7,1606.2 1225.6,1698.0 1307.3,1867.8 1243.0,1822.4 1175.3,1806.6 1098.5,1819.8 1066.4,1841.3 1022.5,1908.8 228.5,1642.3 228.4,1722.8 214.3,1726.4 213.3,1726.7 240.0,270.6 240.6,98.6 282.6,97.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000320/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[237.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0345494,38.9072476]}},{"type":"Feature","properties":{"resourceCoords":[1176.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.031954,38.9072513]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000330/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000330/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000330","type":"ImageService3","width":1454,"height":2086},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"532.4,236.5 757.1,236.7 1406.7,232.4 1419.1,1874.7 1108.8,1876.2 696.1,1880.1 394.1,1881.3 56.4,1884.6 52.6,1645.8 48.3,993.1 46.8,951.4 42.7,812.8 39.7,239.4 532.4,236.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000330/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1393.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03191667315127,38.91255347882784]}},{"type":"Feature","properties":{"resourceCoords":[1393.0,234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03651206668414,38.91257856169625]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000340/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000340/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000340","type":"ImageService3","width":1441,"height":2072},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"932.0,230.0 1090.9,229.0 1405.8,230.7 1404.1,1400.1 1404.2,1857.7 1064.2,1859.0 768.2,1857.5 46.2,1858.3 46.0,227.7 932.0,230.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000340/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03715332254508,38.91250704838981]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03715493873173,38.915666838741345]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,2072.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03135662442962,38.91566865969785]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2072.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03135500824297,38.91250886934632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000350/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p35","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000350/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000350","type":"ImageService3","width":1444,"height":2075},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"464.6,230.7 743.7,231.3 1306.4,229.6 1307.8,640.5 1310.3,914.9 1310.3,1228.8 1314.2,1868.8 436.0,1873.8 143.0,1873.7 140.5,1412.0 136.0,232.1 464.6,230.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000350/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[466.0,947.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0345222,38.9162945]}},{"type":"Feature","properties":{"resourceCoords":[795.0,231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0365036,38.917012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000360/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000360/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000360","type":"ImageService3","width":1437,"height":2062},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"756.5,220.8 1124.8,224.4 1206.2,224.8 1247.8,831.5 1206.0,837.1 1198.6,889.3 1148.6,933.9 1139.3,965.9 1190.9,1666.2 1191.3,1671.6 952.6,1815.6 967.8,1866.0 904.8,1856.8 58.6,1855.6 59.0,1216.8 61.0,903.4 60.2,629.5 61.5,219.2 756.5,220.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000360/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[561.0,1858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03194969754364,38.919201032025455]}},{"type":"Feature","properties":{"resourceCoords":[561.0,219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03650358207966,38.91919524548276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000370/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000370/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000370","type":"ImageService3","width":1435,"height":2069},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"764.4,1973.5 546.7,1898.9 156.3,1940.1 162.2,1914.2 162.8,1617.7 150.8,1573.2 153.4,1381.0 153.6,712.0 155.5,148.2 159.1,103.8 337.2,102.0 415.6,109.4 841.0,109.6 1268.0,108.5 1306.2,106.9 1309.2,106.8 1308.6,1973.5 764.4,1973.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000370/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[158.0,1517.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04667377367548,38.89528695663399]}},{"type":"Feature","properties":{"resourceCoords":[1310.0,2293.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04346154969703,38.89360284860768]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000380/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000380/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000380","type":"ImageService3","width":1422,"height":2054},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"33.3,1945.8 265.0,2000.6 1356.0,1982.0 1398.6,1908.8 1416.8,1506.6 1405.1,120.4 672.0,118.8 578.1,113.0 34.4,114.5 1.0,115.8 1.0,1945.8 33.3,1945.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000380/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[612.0,1206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04172406196804,38.89593368200415]}},{"type":"Feature","properties":{"resourceCoords":[1370.0,919.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03956773541115,38.89656843725646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000390/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p39","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000390/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000390","type":"ImageService3","width":1436,"height":2061},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"764.1,35.7 764.1,4.4 1268.8,5.2 1268.0,118.1 1269.7,612.3 1268.6,1418.7 1268.9,1989.1 1230.6,1990.8 802.6,1992.6 376.3,1993.2 297.7,1985.8 119.1,1988.0 121.4,1942.8 124.0,615.0 122.7,36.7 764.1,35.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000390/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.0,899.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0448909,38.9007094]}},{"type":"Feature","properties":{"resourceCoords":[124.0,615.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0466507,38.9013267]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000400/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000400/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000400","type":"ImageService3","width":1437,"height":2057},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3.3,1981.2 3.8,1419.4 5.9,625.1 4.9,138.3 5.8,27.1 403.9,23.5 630.6,26.1 1403.1,23.2 1404.7,170.3 1428.0,310.1 1427.8,621.9 1422.8,1444.4 1424.2,1859.7 1421.1,1985.6 683.0,1984.0 588.4,1978.2 40.8,1979.7 3.3,1981.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000400/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[627.0,1403.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04170962781775,38.89961765539394]}},{"type":"Feature","properties":{"resourceCoords":[40.0,1135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04336741273623,38.900207300616465]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000410/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000410/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000410","type":"ImageService3","width":1428,"height":2057},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.2,101.8 1.0,101.7 1.0,1515.3 31.1,1515.3 29.6,2017.7 940.0,2021.6 1410.0,2022.0 1412.8,1987.3 1413.4,1518.0 1413.8,964.2 1411.9,912.6 1381.6,845.4 1253.2,581.6 1236.9,533.3 1234.3,488.5 1233.6,103.5 893.8,105.3 716.0,103.5 32.2,101.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000410/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[590.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04881445551585,38.9038623448766]}},{"type":"Feature","properties":{"resourceCoords":[1385.0,2009.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0434866673572,38.905591105498154]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000420/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000420/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000420","type":"ImageService3","width":1438,"height":2054},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"27.1,134.9 27.9,538.0 23.7,767.5 21.2,1549.7 1.0,1566.5 1.0,1596.4 97.0,1594.0 53.9,1625.9 25.2,1661.1 18.2,1699.3 16.6,1907.2 47.0,1907.4 320.4,1909.8 992.6,1915.7 1397.6,1920.3 1403.5,1317.3 1404.5,1015.2 1422.5,1007.4 1404.1,955.4 1405.2,778.9 1406.4,209.0 1410.0,148.4 939.2,144.9 27.1,134.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000420/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[42.0,776.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0416746260392,38.90268432446177]}},{"type":"Feature","properties":{"resourceCoords":[42.0,141.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.043446079975,38.90267529818279]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000430/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000430/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000430","type":"ImageService3","width":1432,"height":2060},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.0,1216.3 155.0,1953.2 627.4,1953.2 662.3,1956.1 723.2,1959.2 1295.7,1956.0 1297.8,1428.8 1296.8,1240.6 1300.2,1018.3 1298.4,435.5 1301.8,100.4 1084.3,100.2 993.2,85.7 943.7,47.9 948.3,128.3 946.2,145.6 940.0,175.2 921.0,133.6 909.0,79.7 668.1,75.8 634.1,1.0 596.5,1.0 625.5,65.4 408.8,99.5 388.0,29.1 381.4,55.7 323.0,90.2 238.6,103.2 151.0,103.0 151.6,562.2 149.8,701.9 155.9,977.4 156.0,1216.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000430/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[150.0,913.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04486950174989,38.90790084906423]}},{"type":"Feature","properties":{"resourceCoords":[150.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04487053918153,38.907241728634574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000440/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p44","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000440/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000440","type":"ImageService3","width":1430,"height":2051},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.7,1423.8 130.9,1236.8 134.5,1015.7 133.4,436.2 137.2,103.1 890.5,103.0 1275.3,104.0 1277.4,540.8 1276.2,843.0 1272.5,945.8 1273.6,1076.9 1270.8,1389.7 1269.3,1884.0 1269.3,1900.7 1269.0,1948.0 666.8,1946.1 365.0,1947.1 357.1,1929.2 305.2,1947.9 129.0,1948.0 131.7,1423.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000440/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1269.0,1948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0385072,38.9056435]}},{"type":"Feature","properties":{"resourceCoords":[129.0,1948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0416914,38.9056438]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000450/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000450/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000450","type":"ImageService3","width":1427,"height":2055},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.6,1274.1 29.2,890.8 28.2,140.5 673.2,143.7 1382.2,143.4 1381.6,438.7 1385.6,547.6 1384.5,780.0 1385.2,1862.2 1384.5,1976.0 740.9,1976.6 518.2,1975.0 30.1,1975.1 28.6,1274.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000450/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1048.0,1965.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0365482598154,38.91187396527387]}},{"type":"Feature","properties":{"resourceCoords":[1369.0,134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04168152498477,38.91257926546807]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000460/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000460/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000460","type":"ImageService3","width":1431,"height":2056},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"674.0,147.1 764.3,141.7 1398.5,144.5 1397.8,703.5 1397.6,1978.2 1081.5,1976.3 922.1,1977.2 32.9,1974.1 33.8,1860.4 35.8,779.8 37.5,547.6 33.8,438.9 35.0,144.0 674.0,147.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000460/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[374.0,1978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03650651398164,38.91335340617289]}},{"type":"Feature","properties":{"resourceCoords":[1058.0,1978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03650883511807,38.91484783763493]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000470/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000470/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000470","type":"ImageService3","width":1435,"height":2056},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"585.5,138.7 791.0,136.9 1152.4,137.6 1152.7,585.4 1234.7,634.2 1278.7,701.2 1344.3,890.6 1299.7,915.3 1290.7,963.4 1290.3,1244.3 1294.5,1983.3 735.1,1984.8 457.6,1984.0 130.9,1985.3 123.9,702.3 121.5,139.7 585.5,138.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000470/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1034.0,1283.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03845757804856,38.917556809476004]}},{"type":"Feature","properties":{"resourceCoords":[452.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04166468922925,38.91630451097811]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000480/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p48","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000480/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000480","type":"ImageService3","width":1431,"height":2056},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"165.9,140.4 399.9,146.5 501.4,146.1 813.4,151.0 872.8,140.7 867.5,95.2 868.6,25.3 924.9,126.8 959.2,118.4 1210.0,405.3 1104.3,431.4 1316.8,727.7 1266.2,748.1 1249.8,1152.7 1080.0,1158.6 1079.5,1209.9 1146.5,1256.1 1201.8,1306.6 1332.2,1990.3 1185.7,1987.9 822.2,1980.3 136.1,1971.2 144.5,1238.7 149.6,960.2 159.4,912.7 204.1,889.0 142.2,700.2 99.7,633.0 19.3,583.2 26.6,139.3 165.9,140.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000480/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[285.0,1124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03889,38.918418]}},{"type":"Feature","properties":{"resourceCoords":[608.0,1978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0364983,38.9191489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000490/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000490/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000490","type":"ImageService3","width":1439,"height":2066},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"284.4,94.5 380.1,100.6 1227.4,100.7 1355.0,94.8 1351.4,140.0 1349.5,714.0 1349.1,1395.3 1346.4,1591.0 1358.7,1636.2 1358.0,1938.2 1352.0,1964.5 730.3,2030.0 116.3,1998.3 72.8,1453.3 91.7,1452.5 85.1,431.4 90.5,96.2 284.4,94.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000490/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[92.0,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05012964820153,38.89718077414509]}},{"type":"Feature","properties":{"resourceCoords":[1348.0,1509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04668965962006,38.895339584873255]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.06"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000050","type":"ImageService3","width":1440,"height":2062},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.0,130.6 79.1,56.8 250.7,21.2 946.5,98.6 1204.2,61.8 1224.6,108.2 1356.8,99.8 1404.5,199.1 1401.0,1918.6 1368.4,1959.0 138.3,2015.4 45.1,1970.0 30.1,1843.5 38.7,997.0 103.5,889.5 39.8,583.9 47.0,130.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02698443836532,38.88010584367337]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02693448303339,38.88304129018719]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02157261047844,38.882985212270476]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02162256581038,38.88004976575666]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000500/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000500/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000500","type":"ImageService3","width":1428,"height":2057},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.3,1416.0 79.8,932.2 81.6,900.3 85.8,353.4 109.7,318.4 156.5,284.5 113.7,289.4 48.8,71.8 205.1,74.1 324.8,75.2 328.2,35.3 338.7,35.3 552.5,35.2 552.5,32.6 1332.4,35.4 1330.7,614.5 1321.3,1944.2 1318.8,1989.4 1192.9,1994.8 357.8,1992.0 263.4,1985.6 72.3,1986.7 76.3,1416.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000500/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[546.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04883600360056,38.90248291461505]}},{"type":"Feature","properties":{"resourceCoords":[1324.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04667450175103,38.90248865840659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000520/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000520/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000520","type":"ImageService3","width":1424,"height":2055},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.4,112.4 148.3,141.5 185.4,152.1 341.7,149.8 776.7,147.4 1276.5,142.6 1278.2,714.3 1275.0,1045.5 1288.3,2054.0 1269.5,2054.0 1248.5,1812.0 917.1,1807.9 398.7,1898.8 185.3,1787.7 117.6,994.1 149.7,156.2 120.0,155.9 128.4,112.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000520/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[815.0,930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05142201536698,38.897891719457455]}},{"type":"Feature","properties":{"resourceCoords":[815.0,-583.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0513945582242,38.90115634630023]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000530/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000530/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000530","type":"ImageService3","width":1422,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1386.0,305.3 1385.2,376.8 1371.5,656.8 1368.0,833.2 1366.2,1141.0 1353.7,1245.5 1344.0,1379.5 1340.7,1528.8 1340.9,1816.5 1340.6,1860.3 1260.3,1851.7 596.9,1843.2 540.1,1854.8 51.1,1851.3 69.2,1812.5 29.8,895.0 119.3,433.7 200.8,346.8 201.8,128.4 559.4,99.2 527.8,200.1 1386.3,285.6 1386.0,305.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000530/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[363.0,1370.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05606337238216,38.900376961035114]}},{"type":"Feature","properties":{"resourceCoords":[1335.0,1370.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05607581149043,38.90247872695295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000540/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000540/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000540","type":"ImageService3","width":1441,"height":2063},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"63.4,299.2 120.3,175.4 608.4,177.3 665.0,165.5 1327.0,172.0 1407.3,180.4 1405.9,510.0 1406.0,849.1 1406.0,1333.0 1405.1,1586.3 1372.9,1598.4 1404.9,1601.1 1402.3,1806.8 1185.3,1872.4 1190.4,1915.4 1156.5,1868.4 1121.5,1844.5 575.7,1841.3 543.8,1839.6 61.0,1837.0 60.2,1335.8 61.3,899.5 60.3,742.7 71.1,705.6 100.2,685.9 57.0,677.1 63.4,299.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000540/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05520652498359,38.899446101493346]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05521247782576,38.90256826605111]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,2063.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04950915456573,38.902574945223684]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2063.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04950320172355,38.89945278066592]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000550/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p55","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000550/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000550","type":"ImageService3","width":1430,"height":2059},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"121.5,416.6 120.7,229.1 513.1,226.1 661.3,227.7 1327.1,221.6 1330.4,395.2 1332.8,904.0 1337.7,1372.4 1344.1,1840.1 1001.6,1844.7 822.4,1844.4 133.1,1848.2 98.0,1848.3 95.5,1634.1 118.4,1623.5 95.3,1623.5 55.3,1620.6 55.0,1500.7 56.1,1139.0 56.1,1124.3 54.6,871.7 50.2,417.3 121.5,416.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000550/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[279.0,1525.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0497107,38.9029695]}},{"type":"Feature","properties":{"resourceCoords":[587.0,227.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0533028,38.9036569]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000560/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000560/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000560","type":"ImageService3","width":1432,"height":2066},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"801.8,167.5 1333.1,155.2 1334.0,754.6 1337.3,1015.1 1335.7,1288.0 1335.7,1883.2 673.5,1882.5 526.2,1879.5 135.9,1878.5 134.8,2065.0 63.9,2065.0 63.9,2037.2 64.0,1700.9 65.6,1330.5 64.7,1043.8 67.5,895.0 76.9,761.4 89.0,657.2 89.9,350.5 93.0,174.8 801.8,167.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000560/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1185.0,549.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05702017899868,38.90492146342121]}},{"type":"Feature","properties":{"resourceCoords":[1331.0,1886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05329311491504,38.905243805149034]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000570/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000570/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000570","type":"ImageService3","width":1424,"height":2051},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1328.8,1872.5 795.1,1882.6 83.2,1886.9 97.4,1606.6 98.3,1535.0 98.7,1508.7 98.8,1481.8 100.0,960.0 103.9,316.1 110.6,196.2 1309.9,182.3 1318.4,803.1 1324.0,1496.1 1328.8,1872.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000570/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[500.0,775.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06115158677753,38.90343609379534]}},{"type":"Feature","properties":{"resourceCoords":[102.0,1884.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05806611926569,38.90259104588603]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000580/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000580/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000580","type":"ImageService3","width":1421,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"569.9,403.6 741.8,400.3 830.0,375.1 1070.4,277.9 1291.5,192.3 1301.2,320.8 1301.5,956.1 1305.8,1711.8 895.9,1714.0 179.3,1713.2 177.5,1023.8 172.4,406.2 569.9,403.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000580/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[177.0,988.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0611874,38.9052025]}},{"type":"Feature","properties":{"resourceCoords":[926.0,1714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0591858,38.9068475]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000590/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000590/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000590","type":"ImageService3","width":1435,"height":2063},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.8,1935.5 1324.9,1949.6 1328.5,1140.7 1329.9,1047.2 1330.8,586.6 1329.9,130.0 1329.8,1.0 1308.2,1.0 1287.6,92.4 616.4,78.9 316.1,258.4 146.4,692.8 119.3,1187.9 259.9,1317.6 120.1,1933.8 119.8,1935.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000590/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1332.0,1133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06506646767755,38.905141447138604]}},{"type":"Feature","properties":{"resourceCoords":[419.0,1045.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06523527007255,38.903173652591015]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000600/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p60","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000600/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000600","type":"ImageService3","width":1428,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"476.8,137.1 530.4,158.4 865.7,164.2 1351.5,168.6 1354.4,1083.7 1358.4,1667.4 1361.2,1688.5 1236.6,1737.0 1014.4,1819.6 772.7,1913.7 684.1,1937.7 512.1,1938.7 114.7,1936.1 114.7,1135.2 115.6,1042.7 114.4,586.6 111.6,134.5 476.8,137.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000600/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[509.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0652153,38.9059877]}},{"type":"Feature","properties":{"resourceCoords":[897.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0652423,38.90683]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000610/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000610/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000610","type":"ImageService3","width":1443,"height":2069},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.2,1689.8 38.0,566.0 151.0,71.9 295.9,23.6 658.5,116.0 1342.8,68.3 1380.0,106.5 1400.2,106.4 1329.0,603.4 1338.9,1060.6 1353.5,1971.1 863.0,1972.6 524.5,1970.9 470.1,1950.0 101.3,1951.9 99.0,1822.0 77.7,1822.3 105.2,1689.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000610/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[882.0,1544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06899129659581,38.906741284390684]}},{"type":"Feature","properties":{"resourceCoords":[882.0,616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.07155598546689,38.90671576327769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000620__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p62 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"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":"5752.0"},{"label":"split_canvas_h","value":"8256.0"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000620__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000620","type":"ImageService3","width":1438,"height":2064},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"122.8,113.9 43.0,605.4 44.3,1058.9 42.0,1961.9 497.0,1974.0 1408.7,1991.6 1411.1,1525.3 1416.2,1525.3 1410.4,925.6 1309.3,923.2 1283.3,760.6 885.2,754.3 811.8,714.6 849.9,691.0 775.1,694.8 771.7,689.0 771.6,689.0 771.6,688.9 704.2,574.4 656.9,299.1 452.1,280.1 451.0,118.3 122.8,113.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000620__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[497.0,1525.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0690845,38.9087237]}},{"type":"Feature","properties":{"resourceCoords":[497.0,1974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0678337,38.9087543]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000630/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000630/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000630","type":"ImageService3","width":1427,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"670.1,115.8 1151.8,20.1 1392.8,54.9 1400.0,879.7 1404.8,1638.7 785.8,1877.8 756.9,1833.0 718.5,1823.0 174.7,1814.1 33.9,1813.3 31.9,1180.8 30.3,711.0 35.3,710.9 24.4,106.5 670.1,115.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000630/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07112748249669,38.91060466759207]}},{"type":"Feature","properties":{"resourceCoords":[1427.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07121709348174,38.91369650938094]}},{"type":"Feature","properties":{"resourceCoords":[1427.0,2058.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06552664721389,38.91379777802192]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2058.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06543703622884,38.91070593623305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000640__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p64 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"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":"5736.0"},{"label":"split_canvas_h","value":"8272.0"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000640__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000640","type":"ImageService3","width":1434,"height":2068},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"255.0,1977.0 255.2,1970.6 735.9,1950.2 750.8,1881.7 856.9,1879.2 912.3,1724.2 1215.4,1615.8 1337.8,1507.2 1433.0,764.0 1433.0,734.5 1432.5,430.9 1338.5,270.6 1344.2,113.8 926.8,105.1 885.5,40.8 730.5,16.4 440.5,106.5 222.6,98.7 217.7,60.8 142.8,76.0 118.1,57.2 48.9,46.4 45.3,871.9 40.0,1631.6 39.2,1668.0 255.0,1977.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000640__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07118644962745,38.91351558008914]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07132860683603,38.916618651512415]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,2068.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06561753834734,38.916779288686946]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2068.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06547538113875,38.91367621726367]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000650/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000650/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000650","type":"ImageService3","width":1440,"height":2066},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"836.3,1867.6 764.8,1690.9 670.1,1693.8 409.3,1693.5 409.4,1552.7 415.6,1009.0 425.4,970.5 470.1,941.4 228.1,323.6 264.4,323.8 569.2,102.7 838.6,101.4 896.0,46.4 920.2,96.6 1070.6,99.3 1122.3,16.9 1100.3,341.9 1125.3,418.2 1177.2,1084.2 1234.5,1844.3 836.3,1867.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000650/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06733121033695,38.91442149551778]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06334875893798,38.91447719236629]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,2066.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06324678061617,38.909999967613636]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2066.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06722923201514,38.90994427076512]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000660/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000660/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000660","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1273.2,1521.1 1273.0,1539.7 1282.1,1570.8 1346.3,1931.6 1211.4,1931.0 893.3,1929.9 434.4,1926.0 219.2,1925.9 164.3,1168.0 114.5,504.0 89.8,427.8 112.8,103.9 207.1,71.0 656.3,105.2 1001.2,50.3 1075.1,101.5 1337.3,113.1 1430.1,654.5 1307.3,866.5 1280.1,859.6 1277.6,1041.8 1277.6,1283.0 1274.6,1429.0 1273.2,1521.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000660/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06454525565955,38.91464904432599]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.060567176287,38.91471385997523]}},{"type":"Feature","properties":{"resourceCoords":[1434.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06044794950752,38.910220593687406]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06442602888008,38.91015577803817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000670/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000670/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000670","type":"ImageService3","width":1464,"height":2096},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"503.2,226.2 1413.8,237.7 1414.5,869.0 1412.4,1129.3 1414.6,1223.9 1237.7,1294.0 1258.2,1691.6 1136.0,1701.0 705.7,1623.4 706.0,1579.7 682.0,1507.5 312.0,1651.0 58.1,1747.7 55.4,1726.4 51.4,1138.6 48.6,217.1 503.2,226.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000670/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06842564280537,38.90764980710988]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0685264921979,38.91082792136931]}},{"type":"Feature","properties":{"resourceCoords":[1464.0,2096.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06272007108495,38.910941066186915]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2096.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06261922169242,38.90776295192748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000680/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000680/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000680","type":"ImageService3","width":1445,"height":2075},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"96.8,1208.8 98.8,572.2 89.6,443.5 213.9,393.7 467.2,295.1 836.5,148.9 861.1,220.5 861.3,264.0 1293.1,337.1 1415.3,326.6 1416.5,541.0 1415.2,998.1 1415.9,1314.9 1416.5,1936.3 1416.6,1965.0 866.0,1967.3 127.3,1964.8 98.5,1965.8 96.8,1208.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000680/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[104.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06123464869565,38.907660089269605]}},{"type":"Feature","properties":{"resourceCoords":[104.0,1968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05919846838948,38.90768422940901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000690/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p69","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000690/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000690","type":"ImageService3","width":1423,"height":2049},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.6,115.6 835.3,116.0 1251.0,113.6 1253.4,532.0 1255.2,1083.4 1264.1,1803.3 1229.4,1805.6 1378.1,1875.9 103.5,1639.5 107.7,1366.5 106.8,1102.5 111.5,495.3 108.6,115.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000690/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[507.0,888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0570505,38.9060975]}},{"type":"Feature","properties":{"resourceCoords":[507.0,116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0591749,38.9060791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000060__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p6 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.38"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6120.8"},{"label":"split_canvas_w","value":"3008.0"},{"label":"split_canvas_h","value":"2111.2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000060__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000060","type":"ImageService3","width":1436,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"728.9,2024.8 736.6,1579.0 700.4,1551.2 54.3,1563.6 48.0,2056.8 728.9,2024.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000060__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1530.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07401924707557,38.92289084636636]}},{"type":"Feature","properties":{"resourceCoords":[752.0,1530.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07208743408599,38.923489976083324]}},{"type":"Feature","properties":{"resourceCoords":[752.0,2058.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07155052211722,38.92242726546059]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2058.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0734823351068,38.921828135743624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000700/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p70","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000700/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000700","type":"ImageService3","width":1720,"height":2304},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"260.9,193.2 1002.0,201.7 1554.3,203.8 1547.9,935.5 1546.9,1588.5 1546.9,1603.9 1546.5,1757.2 1369.8,1677.2 1369.7,1817.5 987.6,1812.3 952.7,1811.9 953.8,1828.0 224.8,1868.6 224.6,1155.1 229.4,608.6 232.0,194.0 260.9,193.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000700/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1424.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0558272,38.908989]}},{"type":"Feature","properties":{"resourceCoords":[232.0,194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0592043,38.9076722]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000710/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000710/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000710","type":"ImageService3","width":1472,"height":2102},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.2,663.5 160.8,174.3 523.7,106.6 555.0,97.2 666.6,97.8 813.7,99.4 1056.7,97.2 1240.4,98.0 1233.7,125.3 1448.5,246.2 1404.2,254.1 1447.0,892.3 1360.3,1366.5 1359.4,1998.0 965.6,1987.3 852.5,2042.3 464.8,2050.4 456.9,2101.0 451.9,2101.0 403.4,2101.0 172.5,2079.1 165.7,1425.1 163.4,692.5 163.2,663.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000710/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[527.0,692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0592749935497,38.911313680161335]}},{"type":"Feature","properties":{"resourceCoords":[527.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.06092756710683,38.911299121399246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p72 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.89"},{"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":"5740.0"},{"label":"split_canvas_h","value":"4074.8"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720","type":"ImageService3","width":1435,"height":2068},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1179.8,939.1 1281.1,970.5 1364.8,109.0 1358.0,109.0 1342.3,109.0 1331.0,109.0 807.8,110.0 162.2,108.8 60.2,106.3 34.8,300.3 97.0,494.5 416.1,670.4 1179.5,934.7 1179.8,939.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[623.0,109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.061143,38.9025758]}},{"type":"Feature","properties":{"resourceCoords":[1358.0,109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.059108,38.9025789]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p72 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4427.6"},{"label":"split_canvas_w","value":"5740.0"},{"label":"split_canvas_h","value":"3844.4"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720","type":"ImageService3","width":1435,"height":2068},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.8,1677.9 218.0,1674.3 222.7,2055.6 222.9,2067.0 385.5,2067.0 524.1,2046.2 546.0,2042.9 1301.8,1929.5 1375.3,1930.8 1365.8,1461.1 1350.5,1465.4 1280.5,1430.2 1280.9,1433.0 1000.3,1440.1 425.9,1248.7 45.6,1268.5 39.2,1224.9 7.5,1220.5 1.0,1300.4 1.0,1503.1 153.1,1499.5 77.8,1677.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000720__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1106.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05537179188198,38.911441260931596]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,1106.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05138254711997,38.91143194349801]}},{"type":"Feature","properties":{"resourceCoords":[1435.0,2068.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05139057461443,38.90935103340411]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2068.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05537981937644,38.909360350837694]}},{"type":"Feature","properties":{"resourceCoords":[218.0,1674.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0547705,38.9102112]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000730/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p73","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000730/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000730","type":"ImageService3","width":1436,"height":2060},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"258.3,1929.8 257.6,1462.5 259.8,955.1 258.0,782.0 257.3,185.1 257.4,181.6 1239.9,353.4 1180.1,1398.2 1179.0,1933.7 258.3,1929.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000730/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[258.0,782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.053301,38.9052539]}},{"type":"Feature","properties":{"resourceCoords":[258.0,261.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0547495,38.905253]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000740/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000740/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000740","type":"ImageService3","width":1439,"height":2073},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.6,1401.7 230.6,354.2 512.9,402.5 364.3,334.9 1127.2,272.3 1125.7,256.2 1149.2,255.9 1149.1,418.2 1170.0,557.7 1173.3,579.5 1287.0,1337.2 1281.7,1669.4 1282.5,1822.0 1283.6,1999.7 350.2,1949.1 314.9,1940.1 175.4,1938.4 174.6,1401.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000740/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[173.0,1474.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05138916733837,38.907246096900586]}},{"type":"Feature","properties":{"resourceCoords":[173.0,1941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05009375150848,38.90724312488994]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000750/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p75","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000750/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000750","type":"ImageService3","width":1448,"height":2089},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"270.8,100.9 1184.8,104.9 1181.5,1086.6 1183.2,1676.6 1181.6,1978.5 451.0,1976.0 452.0,1423.3 450.1,1371.8 420.0,1304.7 292.1,1041.2 275.9,993.0 273.2,948.3 273.0,564.0 270.8,100.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000750/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[451.0,1976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0448591,38.905653]}},{"type":"Feature","properties":{"resourceCoords":[273.0,564.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.048813,38.9052623]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000760/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000760/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000760","type":"ImageService3","width":1436,"height":2072},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"308.4,102.3 343.7,111.6 1278.1,170.1 1278.0,204.1 1276.0,532.8 1274.9,1357.7 1273.4,1996.2 812.9,1993.8 672.9,1991.0 396.6,1995.3 157.0,1993.8 160.1,1688.5 161.0,1092.0 168.8,99.4 308.4,102.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000760/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[166.0,1356.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04662055775103,38.90725714335965]}},{"type":"Feature","properties":{"resourceCoords":[166.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0487920210311,38.90724792716296]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000770/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000770/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000770","type":"ImageService3","width":1449,"height":2089},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.7,608.0 40.8,455.6 44.9,197.4 511.9,187.9 507.6,172.6 542.6,102.6 1016.7,32.9 1332.9,113.0 1351.7,175.4 1448.0,142.7 1448.0,247.8 1419.2,279.0 1335.1,343.4 1287.5,368.3 1227.8,376.5 1270.5,395.8 1314.7,441.9 1336.7,525.1 1387.2,1187.2 1407.0,1187.1 1410.2,1965.8 920.5,1966.3 559.0,1968.4 49.6,1969.0 43.8,1146.8 43.0,819.1 41.7,608.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000770/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05210428911239,38.90955216003313]}},{"type":"Feature","properties":{"resourceCoords":[1449.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05209212822413,38.912707107768625]}},{"type":"Feature","properties":{"resourceCoords":[1449.0,2089.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04628765663821,38.9126933694088]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2089.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04629981752647,38.909538421673304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000780/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000780/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000780","type":"ImageService3","width":1444,"height":2076},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"347.6,24.9 614.0,26.6 1256.7,119.8 1254.9,438.5 1290.8,438.7 1271.7,1214.3 1249.8,1221.0 1248.3,1974.8 1109.7,1992.0 1017.9,2009.0 977.3,1965.2 837.1,1843.7 757.2,1861.9 221.5,1857.8 225.7,1084.6 206.0,1084.6 161.7,426.6 140.4,343.8 96.7,297.6 54.2,278.1 114.0,270.5 161.8,246.2 246.5,183.1 275.6,152.4 276.6,48.0 347.6,24.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000780/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[565.0,1087.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.048793485927,38.91334656057706]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,428.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05064991208849,38.914824323349805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000790/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000790/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000790","type":"ImageService3","width":1446,"height":2075},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.3,1278.8 55.5,1062.7 125.8,1042.1 99.3,1035.5 64.9,977.2 52.0,893.0 52.5,805.7 50.5,170.7 562.3,171.6 925.4,170.6 1417.3,171.6 1415.7,620.5 1415.0,1350.7 1416.5,1957.7 702.8,1957.1 53.6,1953.0 54.0,1736.2 68.6,1645.3 106.4,1596.0 26.2,1600.5 8.9,1598.4 21.0,1573.3 74.7,1561.4 78.9,1321.2 154.5,1287.0 154.6,1249.5 89.3,1278.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000790/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[283.0,800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04487979981279,38.910151069555205]}},{"type":"Feature","properties":{"resourceCoords":[1078.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04341465723358,38.91187422171667]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000080","type":"ImageService3","width":1441,"height":2061},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1350.7,573.9 1348.7,693.7 1351.6,971.3 1359.2,1469.7 1365.5,2012.2 803.8,2020.5 757.3,2022.2 330.9,2023.7 293.9,2022.0 187.2,2020.2 33.5,1957.1 82.9,1951.9 91.1,70.0 732.1,18.6 1342.7,58.1 1350.7,573.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[471.0,1467.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02965853267638,38.89543283760877]}},{"type":"Feature","properties":{"resourceCoords":[769.0,628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0319828071341,38.89610026881946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000800/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000800/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000800","type":"ImageService3","width":1428,"height":2078},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"868.5,390.1 1041.9,815.5 1132.2,813.3 1162.5,797.8 1255.4,1333.2 1387.2,1333.7 1385.1,1963.7 749.9,1960.2 659.4,1965.5 19.6,1961.8 19.4,1358.8 21.7,633.3 24.2,187.3 558.9,189.2 638.6,170.6 779.0,291.4 819.6,334.9 868.5,390.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000800/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[366.0,1328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04343434246464,38.913360720491255]}},{"type":"Feature","properties":{"resourceCoords":[1171.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04488610736101,38.91511439606062]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000810/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p81","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000810/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000810","type":"ImageService3","width":1450,"height":2076},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1126.8,2042.4 917.8,1960.3 794.2,2019.0 292.3,1949.3 311.3,1849.6 141.7,1769.6 93.2,1603.1 88.9,1119.0 53.4,1105.1 49.9,1020.0 136.9,728.3 177.3,619.0 285.0,222.0 288.7,194.3 807.4,202.2 1009.6,203.2 1073.1,207.9 1247.6,222.1 1285.4,381.0 1318.7,538.7 1318.2,939.5 1320.0,1254.0 1320.4,1298.9 1325.2,2049.6 1124.6,2048.7 1126.8,2042.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000810/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1320.0,1254.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0472369,38.9177464]}},{"type":"Feature","properties":{"resourceCoords":[841.0,202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0450013,38.9195422]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000820/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000820/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000820","type":"ImageService3","width":1449,"height":2082},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.0,1280.0 124.5,1976.3 721.9,2037.9 1169.9,1981.3 1332.8,2003.7 1332.2,1683.6 1296.1,1683.8 1309.3,904.7 1331.2,897.7 1327.0,140.7 855.9,175.1 733.4,197.1 647.8,222.7 505.2,280.0 437.5,293.6 21.9,458.1 1.0,466.4 1.0,473.6 6.7,512.3 285.6,1207.4 99.0,1280.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000820/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[740.0,1080.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04893681844925,38.91612170104484]}},{"type":"Feature","properties":{"resourceCoords":[1325.0,1690.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.05063834112377,38.91485499394624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000830/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p83","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000830/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000830","type":"ImageService3","width":1434,"height":2065},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.8,1833.9 106.7,1696.8 217.5,1240.8 233.9,1118.2 235.8,1029.5 224.9,877.1 232.6,809.0 203.5,365.8 201.2,331.6 512.3,309.9 908.8,284.9 1062.7,241.9 1217.5,194.4 1249.8,187.1 1297.6,198.9 1289.6,639.4 1224.5,628.5 1230.9,1033.1 1276.8,1036.8 1280.9,1539.2 1231.9,1553.2 1194.2,1688.2 1153.9,1813.6 615.5,1740.0 621.1,1773.6 596.0,1860.2 138.0,1896.6 70.6,1926.5 81.8,1833.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000830/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1224.0,1005.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04392957451556,38.91702786837773]}},{"type":"Feature","properties":{"resourceCoords":[242.0,816.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04671371798604,38.91676708822188]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000840/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p84","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000840/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000840","type":"ImageService3","width":1444,"height":2064},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"587.4,1994.8 581.9,1854.3 624.4,1825.8 465.8,1347.3 420.8,1357.8 290.1,973.3 355.6,963.7 227.6,540.5 178.3,543.9 149.7,560.9 99.1,394.2 157.4,280.1 744.6,118.5 1061.3,118.7 1163.2,118.7 1209.0,112.8 1220.2,172.4 1219.9,486.7 1221.8,588.9 1219.1,824.6 1220.0,965.0 1218.5,1325.8 1219.7,1531.0 1219.6,1994.3 587.4,1994.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000840/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[235.0,121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0443996,38.9196637]}},{"type":"Feature","properties":{"resourceCoords":[1220.0,965.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0416518,38.9178248]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000850/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p85","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000850/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000850","type":"ImageService3","width":1446,"height":2077},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"147.1,337.1 151.9,312.6 144.2,232.8 164.7,170.0 226.1,99.5 306.9,52.2 410.5,21.7 493.1,126.8 554.5,186.8 638.0,231.7 1120.0,398.4 1105.2,437.1 1049.4,590.4 988.3,749.9 976.9,826.6 996.9,1166.8 1072.2,1143.6 1317.9,1058.9 1324.0,1086.0 1362.4,1493.0 1363.0,1608.8 1383.8,1910.8 1416.7,1988.8 1324.4,1987.4 1249.2,2042.0 653.6,2057.7 109.1,1981.1 95.2,1677.0 148.1,1460.9 115.8,350.7 147.1,337.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000850/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1354.0,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04397814981894,38.9206002946113]}},{"type":"Feature","properties":{"resourceCoords":[885.0,2107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04849169988636,38.92156679174151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000860/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000860/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000860","type":"ImageService3","width":1441,"height":2081},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1120.5,2044.8 920.5,2014.5 408.5,1931.4 214.5,1897.7 151.0,1886.6 73.3,1870.5 221.0,1561.1 268.4,1499.2 399.7,1388.3 472.6,1324.7 523.3,1280.4 555.2,1253.5 211.7,872.5 160.0,792.5 135.1,709.6 113.3,577.0 98.8,491.3 98.3,488.4 58.2,279.9 100.0,224.9 179.8,77.8 197.7,87.0 382.6,181.8 800.5,396.0 895.8,434.3 1089.9,486.9 1324.6,550.5 1405.6,927.6 1440.0,937.0 1440.0,1054.5 1424.2,1082.0 1265.5,1358.0 1112.4,1950.6 1182.6,2058.6 1120.5,2044.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000860/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0414454,38.9235012]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0394564,38.9207958]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,2081.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04447830000001,38.918561100000005]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2081.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0464673,38.9212665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000870/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000870/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000870","type":"ImageService3","width":1451,"height":2086},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1076.5,1814.6 1016.9,1611.7 1053.1,1553.3 1118.1,1400.0 1136.8,1407.4 1328.2,1483.4 1237.2,1100.4 1261.4,1039.5 1434.3,604.5 1447.2,572.1 808.2,300.7 834.9,233.9 620.7,145.9 592.5,1.0 592.4,1.0 549.5,21.8 349.6,141.2 285.8,183.8 131.2,122.5 41.8,959.0 93.1,1268.1 64.9,1813.7 159.5,2026.6 700.6,2080.1 698.7,2085.0 733.1,2085.0 746.6,2065.3 771.1,1989.0 815.0,1939.4 899.4,1899.0 992.5,1887.7 1099.8,1900.9 1076.5,1814.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000870/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[287.0,883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04102324242386,38.92518839558808]}},{"type":"Feature","properties":{"resourceCoords":[1082.0,1904.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.04270979247691,38.9227013046051]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000880/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000880/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000880","type":"ImageService3","width":1436,"height":2062},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1309.5,873.9 1366.2,925.1 1435.0,972.0 1435.0,1024.5 1262.0,1032.3 1249.1,1447.5 1197.7,1468.9 1416.9,1770.9 1072.5,1860.0 876.5,1910.8 774.0,1924.6 301.8,1944.8 301.0,1944.8 59.0,1626.5 56.2,1559.8 36.4,1083.5 63.2,1082.5 70.5,167.6 149.3,168.1 243.0,168.4 275.5,239.9 1063.8,189.1 1094.2,173.1 1170.2,173.7 1309.5,873.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000880/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0360246947038,38.92325111746119]}},{"type":"Feature","properties":{"resourceCoords":[1436.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03601068253633,38.920165128247355]}},{"type":"Feature","properties":{"resourceCoords":[1436.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04166647348741,38.92014936394281]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2062.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04168048565488,38.92323535315665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000890/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000890/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000890","type":"ImageService3","width":1437,"height":2074},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.7,1963.6 32.6,1990.3 935.8,2036.0 937.9,1991.5 939.6,1961.6 1326.3,1958.3 1364.6,1927.3 1365.9,1872.7 1365.8,1267.2 1364.3,978.3 1365.3,223.4 1359.3,186.8 1346.3,135.7 1087.8,45.6 1088.2,54.4 554.2,104.8 117.7,78.5 52.1,550.8 1.0,565.1 1.0,733.5 63.6,776.7 249.5,919.5 284.9,951.9 159.8,1032.1 156.9,1265.2 84.5,1265.0 67.8,1963.7 32.7,1963.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000890/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[304.0,934.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03837599275654,38.925411949649884]}},{"type":"Feature","properties":{"resourceCoords":[1360.0,220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0355400776465,38.92705678545829]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.58"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000090","type":"ImageService3","width":1436,"height":2058},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1326.6,285.1 1432.5,287.1 1435.0,287.2 1435.0,389.7 1339.4,669.1 1369.0,669.6 1326.5,1049.7 1328.1,1049.7 1336.9,1767.9 1342.0,1767.9 1301.8,1830.0 1073.0,1820.1 734.0,1910.2 264.0,1884.2 257.1,1822.4 102.0,1762.2 69.5,1020.6 122.3,748.0 86.8,309.4 122.7,191.6 177.7,129.2 715.3,117.4 741.1,216.0 821.9,258.5 1174.2,222.2 1326.6,285.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1143.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02600640666135,38.8943857328823]}},{"type":"Feature","properties":{"resourceCoords":[884.0,1774.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02396700183934,38.8938038669432]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000900/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000900/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000900","type":"ImageService3","width":1443,"height":2076},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"158.5,1899.0 145.0,1295.1 137.2,1007.0 121.4,254.1 148.8,235.0 257.4,159.8 335.7,120.0 392.8,107.6 956.1,70.4 1199.7,62.2 1213.0,246.8 1226.3,501.8 1252.0,885.7 1288.3,1560.5 1302.1,1839.2 1305.1,1899.5 1307.7,1950.8 605.0,1916.1 604.6,1910.7 194.9,1926.2 158.4,1953.4 158.5,1899.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000900/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[592.0,1899.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03410686164388,38.92351561647755]}},{"type":"Feature","properties":{"resourceCoords":[1260.0,90.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0323694777678,38.92746382127315]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000910/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000910/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000910","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1181.4,1821.9 1150.7,1836.2 372.6,1852.3 343.6,1781.1 251.4,1776.7 129.8,1770.7 100.2,1769.0 97.2,1386.2 66.5,1348.3 40.4,1311.5 34.2,904.7 39.6,904.5 90.0,208.2 287.0,202.7 908.6,181.1 911.1,237.5 1401.8,385.8 1402.2,402.6 1422.0,1098.3 1411.3,1129.6 1359.8,1171.5 1350.2,1222.8 1308.6,1226.5 1322.6,1829.0 1181.4,1821.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000910/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[562.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03200601580592,38.922414010056556]}},{"type":"Feature","properties":{"resourceCoords":[49.0,1363.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03535234657026,38.92341209464967]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000920/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p92","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000920/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000920","type":"ImageService3","width":1445,"height":2081},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"502.0,1809.9 315.5,1853.5 264.8,1868.0 123.7,1627.3 135.2,1626.6 268.6,1126.4 325.4,1122.0 283.1,495.4 267.9,245.3 264.3,185.0 309.7,158.4 375.7,145.6 1138.5,158.6 1132.0,775.0 1124.7,1400.5 1125.9,1629.2 1132.0,1667.0 502.0,1809.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000920/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1132.0,775.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.029705,38.9224338]}},{"type":"Feature","properties":{"resourceCoords":[1132.0,1667.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0296703,38.9205077]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000930/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000930/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000930","type":"ImageService3","width":1438,"height":2076},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.8,262.2 493.4,256.4 1118.6,251.1 1115.8,286.7 1121.8,815.4 1121.9,1212.3 1259.5,1212.1 1437.0,1666.5 1437.0,1808.0 319.9,1934.9 318.4,1922.0 312.6,1873.3 245.2,1878.0 296.4,1216.4 311.2,1216.3 355.8,1216.0 338.1,1018.5 306.0,604.5 298.4,554.8 227.2,269.1 264.8,262.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000930/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1109.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02703147187202,38.92240007982212]}},{"type":"Feature","properties":{"resourceCoords":[1109.0,250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02970818744221,38.92241300920157]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000940/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p94","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000940/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000940","type":"ImageService3","width":1436,"height":2064},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"478.8,1657.7 302.7,1202.3 165.0,1202.0 166.2,804.8 162.1,275.6 165.0,240.0 781.7,236.1 1240.4,234.8 1243.4,464.7 1244.6,1157.9 1250.9,1239.4 1306.5,1696.9 1313.7,1751.5 1321.3,1814.7 855.2,1765.2 854.3,1758.0 478.3,1799.3 478.8,1657.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000940/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[165.0,1202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.027036,38.922428]}},{"type":"Feature","properties":{"resourceCoords":[165.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.029705,38.9224338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000950/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p95","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000950/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000950","type":"ImageService3","width":1444,"height":2080},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"223.8,2031.7 220.4,531.6 227.8,531.5 327.3,74.6 338.4,74.5 874.9,69.3 1046.9,64.6 1297.4,64.8 1298.7,230.4 1303.0,939.8 1309.9,1708.2 1308.4,1848.2 1312.6,2045.4 1312.9,2079.0 1288.3,2045.5 781.5,2047.2 783.6,2016.9 479.6,2017.1 353.5,2030.6 223.8,2031.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000950/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02624771269522,38.925006173083275]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02228226230787,38.925334611167976]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,2080.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02167842031203,38.92085938487028]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2080.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02564387069938,38.92053094678558]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000960/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p96","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000960/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000960","type":"ImageService3","width":1436,"height":2079},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"15.0,1757.6 19.1,1617.4 26.9,847.4 36.0,136.7 289.9,136.8 484.7,133.0 495.2,126.2 1165.5,92.2 1179.8,120.8 1304.9,77.0 1306.2,50.1 1377.5,68.2 1432.9,484.3 1395.3,939.2 1432.6,1349.7 1427.3,1417.5 1370.4,1698.0 1424.2,1995.0 1424.2,2007.3 172.7,2065.6 49.5,2044.0 14.9,2003.4 15.4,1955.3 15.0,1757.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000960/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[446.0,1285.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0210927,38.9224545]}},{"type":"Feature","properties":{"resourceCoords":[446.0,1913.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.020878,38.921109]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000970/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000970/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000970","type":"ImageService3","width":1437,"height":2071},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"454.8,1958.0 389.0,1971.9 344.0,1999.3 322.7,1720.2 268.1,1044.5 232.0,660.4 211.8,405.0 193.5,220.2 463.1,204.3 1214.5,163.4 1215.7,578.2 1215.6,1039.0 1217.0,1499.2 1218.3,1958.1 454.8,1958.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000970/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,2030.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03231938963495,38.9236157562233]}},{"type":"Feature","properties":{"resourceCoords":[278.0,204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.03230445428545,38.92755539152244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000980/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000980/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000980","type":"ImageService3","width":1433,"height":2063},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"225.3,1312.2 215.6,1230.7 186.3,535.5 174.0,305.1 635.4,285.2 1097.2,266.8 1110.5,616.0 1135.6,1177.6 1168.7,1373.5 1208.0,1626.4 980.2,1664.1 752.1,1695.3 299.6,1768.8 225.3,1312.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000980/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1127.0,1252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02698257521082,38.926714610878584]}},{"type":"Feature","properties":{"resourceCoords":[1127.0,288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.02964479390793,38.92680400611797]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000990/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Washington, District-Of-Columbia | 1903 | sanborn01227_002 p99","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:33:55Z","modified":"2026-10-24T15:33:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000990/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000990","type":"ImageService3","width":1450,"height":2078},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"981.0,1960.8 810.0,1962.2 277.0,1956.7 202.6,1956.0 147.5,1956.1 151.3,1500.3 158.8,1271.6 160.0,1042.0 161.4,699.5 164.5,585.9 181.6,548.5 184.7,127.0 1198.5,139.5 1254.1,161.4 1253.5,196.8 1251.9,334.1 1229.7,1966.0 981.0,1960.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd385m:g3851m:g3851gm:g01227002:sb000990/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0267442023254,38.92904662757664]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02274517913676,38.92944068413429]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,2078.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0220194131053,38.92498134064667]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2078.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.02601843629394,38.924587284089014]}},{"type":"Feature","properties":{"resourceCoords":[160.0,1042.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.025939,38.926854]}}]}}]}