{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03573_023.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1950 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000a/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_023 p0a","metadata":[{"label":"streets","value":"161"},{"label":"intersections","value":"456"}],"created":"2026-09-23T22:31:32Z","modified":"2026-09-23T22:31:32Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000a/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000a","type":"ImageService3","width":1379,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"56.8,1339.2 25.7,1302.8 24.4,1298.9 57.7,1337.2 70.5,1343.6 75.7,1330.2 88.0,1309.6 101.7,1291.8 110.4,1283.7 102.3,1274.6 62.1,1254.4 65.4,1249.5 77.1,1237.2 86.8,1241.9 108.0,1214.7 121.8,1232.5 141.2,1217.6 155.2,1217.5 155.8,1212.8 148.7,1191.8 145.1,1158.0 110.7,1173.5 99.8,1175.5 83.1,1174.5 63.5,1166.5 0.0,1127.4 0.0,987.2 4.1,983.2 0.0,978.3 0.0,12.8 6.0,5.7 7.6,0.0 581.4,0.0 581.5,9.0 612.1,9.1 612.0,0.0 656.2,0.0 656.7,3.2 670.9,3.6 670.9,0.0 759.4,0.0 762.0,7.0 769.8,0.0 807.4,0.0 812.4,5.7 818.9,0.0 849.3,0.0 855.5,6.9 863.4,0.0 899.0,0.0 902.7,4.2 907.5,0.0 988.3,0.0 991.6,3.8 995.9,0.0 1023.7,0.0 1030.8,8.1 1040.1,0.0 1061.2,0.0 1065.0,4.5 1061.8,7.2 1067.8,13.8 1081.3,1.4 1094.6,14.2 1109.0,17.1 1108.0,0.0 1158.5,0.0 1168.8,4.2 1277.5,3.6 1285.5,6.5 1289.4,10.9 1291.0,0.0 1379.0,0.0 1379.0,56.0 1375.0,56.0 1379.0,80.6 1379.0,120.9 1370.2,121.0 1379.0,174.8 1379.0,275.8 1376.3,278.1 1379.0,281.2 1379.0,334.1 1369.7,342.1 1379.0,351.3 1379.0,510.0 1269.8,510.4 1266.9,520.7 1254.0,534.1 1249.1,542.4 1247.8,551.3 1248.5,570.2 1243.3,569.2 1243.9,573.1 1227.8,573.4 1228.3,597.0 1244.8,597.0 1244.9,659.1 1246.3,665.0 1251.3,671.9 1251.9,668.1 1257.6,669.8 1367.5,668.0 1373.4,669.8 1379.0,674.7 1379.0,838.3 1366.0,839.5 1367.0,852.0 1379.0,851.9 1379.0,871.5 1368.5,871.9 1370.0,936.8 1379.0,936.8 1379.0,1030.9 1293.6,1033.0 1282.2,1035.7 1265.3,1045.0 1379.0,1042.8 1369.5,1051.8 1364.6,1068.1 1379.0,1084.2 1379.0,1094.9 1315.0,1152.0 1303.8,1158.2 1277.2,1159.5 1219.0,1157.2 1219.0,1160.8 1204.6,1161.1 1194.4,1164.8 1133.9,1330.4 1130.2,1353.4 1133.0,1373.1 1138.2,1385.3 1307.9,1668.9 1317.9,1687.0 1318.0,1691.6 1340.6,1700.5 1325.8,1733.0 1305.8,1724.7 1291.7,1756.8 1331.4,1751.3 1379.0,1749.5 1379.0,1789.2 1372.0,1805.0 1379.0,1807.8 1379.0,1825.1 1373.1,1838.4 1379.0,1841.0 1379.0,1874.5 1367.2,1901.0 1379.0,1906.3 1379.0,1956.4 1378.3,1955.0 1327.8,1979.0 1300.5,1967.3 1295.5,1979.0 1291.1,1979.0 1261.2,1965.8 1254.2,1979.0 1219.2,1979.0 1212.0,1975.8 1210.8,1979.0 1036.4,1979.0 1040.0,1971.7 1039.0,1960.7 1040.7,1955.0 1102.5,1862.0 1095.6,1857.3 1107.8,1839.6 1114.4,1844.0 1124.0,1830.4 1129.3,1828.7 1191.2,1835.6 1217.7,1847.2 1245.7,1781.0 1179.5,1756.5 985.5,1722.5 956.8,1714.3 914.8,1694.5 820.5,1634.5 799.0,1616.7 801.4,1613.7 658.8,1485.4 663.5,1467.5 683.0,1366.7 657.4,1361.8 634.7,1367.3 628.0,1360.7 552.1,1334.6 543.5,1359.7 540.4,1378.3 509.9,1371.7 488.4,1361.0 492.4,1355.1 494.8,1347.0 491.1,1339.3 467.2,1327.1 447.1,1320.0 449.2,1309.7 438.8,1298.0 415.8,1334.2 380.0,1316.0 367.1,1351.0 334.1,1330.8 334.8,1363.7 360.1,1370.7 365.7,1354.7 421.1,1388.8 436.4,1395.7 549.4,1425.5 573.1,1435.6 651.2,1484.3 743.0,1566.2 736.5,1569.9 646.3,1599.9 631.9,1595.4 632.5,1592.7 528.9,1595.4 535.5,1634.4 532.6,1636.1 515.1,1636.0 506.8,1633.4 491.3,1623.4 493.4,1611.0 500.4,1591.3 477.5,1581.5 474.6,1580.2 452.7,1567.9 427.5,1547.3 353.9,1440.6 334.4,1423.2 310.3,1412.2 259.9,1401.6 203.5,1374.9 183.1,1371.8 140.4,1372.7 121.2,1369.5 90.9,1358.2 56.8,1339.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000a/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1246.2,867.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6125509,39.2731985]}},{"type":"Feature","properties":{"resourceCoords":[1191.2,1052.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6148263,39.2662204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000b/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1950 | sanborn03573_023 p0b","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"18"}],"created":"2026-09-23T22:31:32Z","modified":"2026-09-23T22:31:32Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000b/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000b","type":"ImageService3","width":1399,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1399.0,1979.0 -0.0,1979.0 -0.0,-0.0 1399.0,0.0 1399.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195001:03573_01_1950-0000b/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[717.1,1462.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6155151,39.2951028]}},{"type":"Feature","properties":{"resourceCoords":[577.3,1462.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6440915,39.2939536]}}]}}]}