{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_014.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1915 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"163"},{"label":"placed","value":"106"},{"label":"unplaced","value":"57"},{"label":"fit sources","value":"georef-snap 63, georef 43"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"37 sheet(s) cut into 80 panels"},{"label":"unplaced pages","value":"p0b__1 (tier 1, 39.31037,-76.61143 +/-255m); p0b__2 (tier 1, 39.30766,-76.64170 +/-100m); p0b__3 (tier 1, 39.30794,-76.64439 +/-100m); p0b__4 (tier 3, 39.30945,-76.62804 +/-1326m); p668__2 (tier 1, 39.31053,-76.64347 +/-102m); p671__1 (tier 1, 39.31755,-76.64765 +/-100m); p680 (tier 1, 39.31514,-76.62890 +/-256m); p681__1 (tier 1, 39.31084,-76.64124 +/-165m); p687 (tier 1, 39.31247,-76.62534 +/-260m); p698__1 (tier 1, 39.31463,-76.59285 +/-161m); p698__2 (tier 2, 39.31293,-76.59121 +/-201m); p699__1 (tier 1, 39.31139,-76.58707 +/-176m); p700__1 (tier 1, 39.32015,-76.56709 +/-171m); p700__2 (tier 1, 39.31928,-76.56761 +/-248m); p700__3 (tier 1, 39.33683,-76.58173 +/-112m); p708__1 (tier 1, 39.31890,-76.62396 +/-100m); p708__3 (tier 1, 39.31818,-76.62362 +/-100m); p709__2 (tier 1, 39.31984,-76.61979 +/-100m); p712__2 (tier 1, 39.31823,-76.60586 +/-156m); p713 (tier 1, 39.32360,-76.60078 +/-254m); p714__1 (tier 1, 39.32211,-76.59463 +/-142m); p719__1 (tier 1, 39.33212,-76.64790 +/-165m); p720 (tier 1, 39.33282,-76.64512 +/-255m); p721__2 (tier 1, 39.32293,-76.62994 +/-100m); p722__1 (tier 1, 39.32790,-76.63618 +/-158m); p727__2 (tier 1, 39.33063,-76.63022 +/-136m); p727__3 (tier 1, 39.33399,-76.62672 +/-165m); p729__1 (tier 1, 39.33620,-76.62077 +/-136m); p735__2 (tier 1, 39.33304,-76.63970 +/-134m); p743__1 (tier 2, 39.35446,-76.64088 +/-159m); p743__2 (tier 1, 39.36039,-76.63454 +/-100m); p746__1 (tier 1, 39.37160,-76.64994 +/-252m); p746__2 (tier 1, 39.36759,-76.64809 +/-100m); p747 (tier 1, 39.36713,-76.65307 +/-252m); p748__1 (tier 3, 39.36726,-76.65004 +/-705m); p748__2 (tier 1, 39.36613,-76.64831 +/-100m); p749__2 (tier 1, 39.36078,-76.66177 +/-101m); p750 (tier 3, 39.36918,-76.65793 +/-705m); p752__1 (tier 1, 39.34404,-76.60215 +/-508m); p752__2 (tier 1, 39.34669,-76.60250 +/-100m); p752__3 (tier 1, 39.34322,-76.59958 +/-190m); p754__2 (tier 1, 39.35253,-76.60612 +/-154m); p760__3 (tier 1, 39.32636,-76.58744 +/-100m); p762__2 (tier 1, 39.32286,-76.57279 +/-515m); p769__2 (tier 1, 39.35530,-76.56449 +/-147m); p771__2 (tier 1, 39.33650,-76.55142 +/-134m); p772__1 (tier 1, 39.33510,-76.55680 +/-134m); p773 (tier 2, 39.34350,-76.54356 +/-100m); p774__2 (tier 1, 39.30918,-76.57057 +/-100m); p775 (tier 3, 39.31947,-76.55953 +/-705m); p776__1 (tier 3, 39.31795,-76.55346 +/-705m); p776__2 (tier 1, 39.31934,-76.55190 +/-100m); p777 (tier 3, 39.32565,-76.55361 +/-705m); p778 (tier 2, 39.35424,-76.60112 +/-100m); p779__1 (tier 4, 39.32973,-76.61450 +/-5951m); p779__2 (tier 4, 39.32973,-76.61450 +/-5951m); p780 (tier 2, 39.33664,-76.60962 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0665/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p665","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0665/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0665","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1320.0,753.0 1323.3,1045.5 1329.4,1913.1 1006.9,1981.1 341.7,1982.7 91.6,1889.9 149.2,181.4 1319.3,164.9 1320.0,753.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0665/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[728.0,1342.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6513585,39.310761]}},{"type":"Feature","properties":{"resourceCoords":[124.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6528843,39.3128326]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0666/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p666","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0666/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0666","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"351.6,1037.7 348.8,744.4 349.3,154.8 765.5,149.9 1099.0,275.5 1103.0,743.0 1102.5,1333.3 1103.9,1723.7 1107.1,1894.7 1000.7,1935.7 355.9,1907.5 351.6,1037.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0666/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1103.0,743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6482802,39.3119329]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,1610.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6481903,39.3103716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0667/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p667","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0667/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0667","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"348.9,275.2 351.6,741.9 349.4,1331.0 349.6,1720.6 352.3,1891.3 367.9,1885.3 1009.3,1912.2 1116.4,1909.5 1119.5,1306.4 1118.5,738.3 1115.3,571.3 1114.8,242.4 1219.9,117.8 1244.9,66.1 1199.6,93.4 1114.8,184.8 1111.6,1.0 725.3,1.0 586.4,118.9 583.7,175.8 398.6,294.1 348.9,275.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0667/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[339.0,1332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64824424787453,39.31086708002781]}},{"type":"Feature","properties":{"resourceCoords":[1083.0,1332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64650943894101,39.31093082526286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0668__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p668 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"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":"5784.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0668__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0668","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.3,1915.5 68.2,1922.7 653.0,1952.3 997.0,1873.6 1108.9,1359.3 1253.0,1324.8 1160.8,1207.8 916.7,907.1 756.9,714.5 747.6,714.3 727.0,714.1 727.0,714.1 727.0,678.5 576.0,487.0 214.1,57.6 188.5,109.5 81.3,234.2 79.0,565.9 80.7,734.4 76.7,1307.3 68.3,1915.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0668__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[361.0,1914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6456913,39.3099239]}},{"type":"Feature","properties":{"resourceCoords":[576.0,487.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64538,39.3124971]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0669/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p669","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0669/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0669","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1366.6,894.0 1372.0,1345.9 1371.4,1831.5 1414.0,1830.6 1310.1,1997.2 993.6,1832.6 706.1,1837.0 544.5,1914.8 149.2,1892.9 94.4,1785.7 150.7,1690.3 168.7,1380.2 48.9,619.0 151.4,528.4 171.9,159.6 221.5,194.3 488.4,89.7 1134.2,114.4 1368.3,335.4 1366.6,894.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0669/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.64960922125708,39.32082870451788]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6473667907664,39.31890205092042]}},{"type":"Feature","properties":{"resourceCoords":[1446.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65090178512638,39.31640470749052]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65314421561706,39.31833136108798]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0670/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p670","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0670/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0670","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.5,1851.2 100.2,1370.0 93.1,922.1 92.7,368.7 131.1,405.0 222.8,337.1 513.5,338.6 643.7,194.8 615.0,148.7 672.7,140.6 832.4,164.4 1011.4,366.8 1315.4,394.6 1279.8,400.6 1284.5,592.0 1301.5,1834.8 1424.3,1833.2 1424.6,1855.2 1107.6,1893.9 971.5,1810.8 173.5,1802.7 143.8,1850.5 101.5,1851.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0670/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1290.0,1000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6472753,39.3162295]}},{"type":"Feature","properties":{"resourceCoords":[634.0,382.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6472344,39.3178588]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0671__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p671 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5784.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0671__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0671","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.2,27.4 265.9,32.8 267.2,228.1 262.7,1495.5 387.9,1496.1 409.7,1516.3 584.4,1498.0 667.6,1576.1 661.0,1705.5 1050.5,1935.2 1052.9,2010.5 1336.7,1963.7 1405.3,2028.1 1405.8,1841.0 1423.7,1820.0 1421.0,1688.0 1421.2,1685.9 1408.5,1685.8 1412.3,1525.2 1424.4,1476.4 1265.2,1476.1 1294.0,997.3 1303.0,997.4 1275.7,657.5 1251.0,657.1 1247.5,471.8 1269.5,121.3 1145.4,112.5 1137.8,118.4 302.2,27.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0671__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[611.0,991.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6473136,39.3153622]}},{"type":"Feature","properties":{"resourceCoords":[938.0,653.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6462359,39.3153493]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0672/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p672","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0672/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0672","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"196.7,1388.4 169.3,1053.3 145.0,1053.0 141.3,870.2 162.6,524.7 40.2,516.1 146.6,433.3 180.5,177.4 357.6,76.0 685.9,54.4 867.6,74.7 878.7,97.0 950.3,107.0 1270.6,134.2 1218.4,413.7 1266.4,414.0 1227.8,699.5 1249.7,699.5 1241.2,1292.0 1246.1,1863.9 686.9,1866.3 678.4,1918.7 693.1,2043.0 549.6,1925.3 444.0,2049.5 301.9,2051.4 305.1,1908.6 317.0,1860.5 160.1,1860.4 187.8,1388.3 196.7,1388.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0672/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[145.0,1053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6457521,39.3149395]}},{"type":"Feature","properties":{"resourceCoords":[950.0,1296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6448862,39.3135837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0673/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p673","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0673/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0673","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"259.3,1248.5 271.1,658.8 249.2,658.6 289.3,374.7 241.6,374.1 295.1,96.3 684.9,131.7 1179.3,186.1 1170.9,382.0 1171.9,669.2 1164.0,970.0 1159.9,1261.8 1161.3,1420.7 1156.0,1776.6 1180.7,1836.2 796.8,1828.5 548.8,1826.3 529.4,1848.7 502.4,1825.9 260.9,1817.7 259.3,1248.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0673/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[529.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6435116,39.313198]}},{"type":"Feature","properties":{"resourceCoords":[1164.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6424923,39.3123646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0674/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p674","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0674/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0674","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1321.3,1618.0 1220.5,1769.4 1245.2,1874.4 280.9,1822.0 276.8,1830.1 129.1,1825.9 104.0,1766.5 107.3,1410.0 105.0,1251.0 107.5,958.8 113.7,657.6 111.1,370.1 118.4,173.8 403.4,204.9 1288.4,287.4 1327.9,289.5 1273.0,838.9 1240.2,1205.9 1396.5,1222.8 1321.3,1618.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0674/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[670.0,1251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6420935,39.311263]}},{"type":"Feature","properties":{"resourceCoords":[105.0,1251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6429939,39.3120076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0675/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p675","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0675/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0675","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.5,1917.6 136.0,1028.2 137.6,741.2 138.3,242.8 570.2,226.8 562.9,195.4 1030.1,108.8 1296.0,179.2 1340.3,162.7 1347.2,163.1 1329.3,411.0 1333.9,843.2 1333.6,1950.6 573.8,1954.2 146.5,1957.1 144.5,1917.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0675/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1037.0,814.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6393658,39.3141944]}},{"type":"Feature","properties":{"resourceCoords":[1037.0,1952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6377616,39.3125601]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0676/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p676","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0676/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0676","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"410.7,1956.0 364.7,1956.4 70.0,1955.9 73.0,856.5 69.6,427.4 87.9,181.3 81.1,180.8 350.1,81.0 911.4,117.0 1228.2,69.2 1301.8,144.2 1289.1,246.5 1385.7,320.2 1352.3,545.4 1357.1,546.9 1298.8,768.0 1424.0,838.5 1424.1,924.4 1199.3,1223.7 945.8,1569.9 944.0,1955.3 924.4,1964.3 903.4,1955.1 410.7,1956.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0676/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[372.0,1961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63664229183233,39.313211155298184]}},{"type":"Feature","properties":{"resourceCoords":[74.0,1961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63719835997502,39.31288272478258]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0677/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p677","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0677/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0677","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1175.4,2046.8 764.9,1986.8 671.6,1859.5 647.5,1826.5 414.8,1511.3 411.2,1075.0 412.7,694.3 360.6,624.5 215.6,642.9 128.9,427.3 124.0,428.9 14.5,225.1 117.5,226.3 163.9,136.2 497.2,57.1 1305.3,66.6 1372.7,112.7 1392.9,86.5 1384.0,348.2 1383.0,1076.0 1385.8,1566.0 1385.6,1823.8 1426.6,1880.4 1427.0,1925.0 1257.6,2047.7 1182.0,2048.1 1176.3,2048.1 1175.4,2046.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0677/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1383.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6339052,39.315206]}},{"type":"Feature","properties":{"resourceCoords":[413.0,626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.636157,39.3159894]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0678/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p678","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0678/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0678","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"37.6,1564.8 35.6,1073.6 37.9,344.2 47.3,81.9 73.3,48.2 807.9,27.9 1071.7,114.8 1337.3,65.4 1344.1,126.0 1422.2,127.1 1422.2,136.8 1422.3,177.8 1392.4,179.4 1371.3,260.2 1343.4,260.6 1372.4,1521.0 1343.0,1522.3 1345.3,1966.3 1114.8,1967.7 148.6,1978.0 97.3,1906.8 78.2,1924.7 77.9,1880.0 36.9,1823.2 37.6,1564.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0678/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1115.0,1524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6314048,39.3144295]}},{"type":"Feature","properties":{"resourceCoords":[598.0,1524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6325957,39.314417]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0679/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p679","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0679/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0679","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"772.8,1787.7 586.9,1922.4 547.5,1939.2 89.9,1935.9 70.2,1935.8 75.0,1494.0 104.2,1493.2 95.2,239.2 123.0,239.2 145.2,159.1 175.0,158.1 175.7,107.6 323.9,112.0 778.2,35.0 1371.9,82.6 1397.1,1785.6 1424.0,1792.4 1424.0,1813.0 1424.2,1824.7 1008.0,1962.0 1022.9,2002.9 1004.1,2044.6 961.7,2049.6 923.0,1998.9 772.8,1787.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0679/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[505.0,1235.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6299017822334,39.31492470860705]}},{"type":"Feature","properties":{"resourceCoords":[827.0,1734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62912239208877,39.31404800797876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0681__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p681 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"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":"5784.0"},{"label":"split_canvas_h","value":"5266.4"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0681__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0681","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.9,305.9 23.1,588.8 48.3,691.6 128.7,733.4 127.0,871.9 34.5,1007.2 55.0,1264.9 8.8,1314.0 49.2,1313.8 50.0,1306.6 109.0,1306.6 109.8,1313.7 1269.0,1311.3 1271.6,1315.6 1329.8,1315.6 1341.5,1260.5 1339.9,890.1 1342.4,131.0 917.1,135.9 367.0,140.2 1.0,146.8 1.0,303.5 30.9,305.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0681__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[224.0,128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64071536459127,39.310838379365876]}},{"type":"Feature","properties":{"resourceCoords":[910.0,128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63943170917945,39.311585331341085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0682/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p682","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0682/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0682","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.0,908.0 168.4,133.5 940.0,133.0 1241.5,134.0 1256.2,133.9 1242.8,169.3 1238.3,1147.2 1219.3,1913.8 1214.7,2026.3 1213.6,2049.8 1200.4,2049.8 1156.4,2019.5 1133.3,2003.8 1117.3,1986.0 759.1,1941.3 166.6,1477.9 85.5,1341.7 144.9,1342.2 157.3,1286.1 159.0,908.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0682/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[381.0,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6382316,39.312282]}},{"type":"Feature","properties":{"resourceCoords":[940.0,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6372131,39.3128856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0683/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p683","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0683/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0683","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1030.1,1882.3 1031.7,1909.7 978.5,1909.6 950.7,1909.6 1211.7,1972.1 1328.8,1902.6 1373.1,1907.8 1422.5,1907.6 1395.2,1866.9 1328.3,1767.1 1288.0,1193.5 1036.4,818.2 1282.5,652.4 992.9,223.1 584.9,146.2 496.8,15.1 465.0,1.0 444.7,1.0 439.8,4.4 26.4,287.9 1.0,305.5 1.0,332.3 8.8,342.8 555.1,1147.8 970.7,1787.5 1030.1,1882.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0683/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1036.0,824.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6341856872432,39.312400411061525]}},{"type":"Feature","properties":{"resourceCoords":[495.0,-15.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63553427049949,39.313845027990695]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0684/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p684","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0684/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0684","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"440.6,1889.0 413.7,1848.3 347.9,1748.8 311.6,1178.5 64.0,804.0 309.6,640.8 51.6,252.9 78.9,235.1 25.6,213.7 106.3,217.2 301.9,89.2 347.7,159.3 1305.8,192.9 1289.0,719.0 1287.1,1297.0 1276.4,1298.1 1293.9,1891.3 1266.1,1912.9 1034.7,1969.3 440.6,1889.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0684/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1289.0,719.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6313579,39.3126936]}},{"type":"Feature","properties":{"resourceCoords":[64.0,804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6341855,39.3124107]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0685/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p685","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0685/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0685","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.0,205.7 24.5,730.4 21.8,1306.9 11.1,1308.1 27.8,1899.8 1.0,1920.5 1.0,1921.0 66.2,1905.2 354.2,1982.8 1195.8,1966.4 1407.1,1912.2 1414.8,1315.2 1410.3,741.4 1167.0,375.8 1115.9,304.4 973.1,89.7 784.1,217.9 744.5,233.4 289.4,215.9 42.0,205.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0685/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1398.0,1306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6280853879021,39.31180898150808]}},{"type":"Feature","properties":{"resourceCoords":[590.0,725.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63004476335483,39.312765132584055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0686/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p686","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0686/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0686","type":"ImageService3","width":1456,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"136.8,340.7 157.2,299.9 144.0,258.5 564.5,138.7 564.8,127.0 587.4,112.9 738.3,157.8 958.5,451.9 1101.0,461.9 1131.0,569.5 1375.3,737.2 1351.3,1398.2 1191.4,1981.0 1107.1,1980.3 359.5,1900.5 334.2,1906.7 347.7,1308.2 348.7,732.9 108.2,363.9 136.8,340.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0686/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[352.0,1305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62803564400244,39.311800623600405]}},{"type":"Feature","properties":{"resourceCoords":[352.0,1630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62798264295806,39.31121835482739]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0688/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p688","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0688/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0688","type":"ImageService3","width":1451,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"166.8,179.8 166.5,156.5 749.2,186.1 749.2,175.5 1207.0,173.4 1207.2,192.6 1204.8,959.7 1215.2,1826.6 1206.2,1958.3 1262.2,1972.5 668.5,2006.1 186.3,1931.2 88.6,1745.9 49.8,1435.3 105.0,729.8 45.1,380.5 102.3,196.5 166.8,179.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0688/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62227531504084,39.314380074912314]}},{"type":"Feature","properties":{"resourceCoords":[1451.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61894033636675,39.314499438702356]}},{"type":"Feature","properties":{"resourceCoords":[1451.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61872210305194,39.310797828016625]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62205708172603,39.310678464226584]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0689/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p689","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0689/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0689","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.5,1919.4 150.8,1788.8 143.2,928.7 148.0,167.6 1312.2,168.0 1314.7,1653.0 1316.3,1921.8 491.6,2008.5 263.7,1930.0 196.5,1933.7 141.5,1919.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0689/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[435.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6187477,39.3131592]}},{"type":"Feature","properties":{"resourceCoords":[1313.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6166997,39.3132365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0690/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p690","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0690/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0690","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"828.0,183.0 1327.3,184.3 1321.8,1948.2 1005.3,1962.1 772.0,1867.6 140.9,1930.6 140.7,1662.8 145.7,183.6 828.0,183.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0690/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[485.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6158299,39.3122527]}},{"type":"Feature","properties":{"resourceCoords":[828.0,183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6151674,39.3143039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0691/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p691","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0691/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0691","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"106.8,155.1 740.4,154.2 1349.5,155.4 1348.0,756.6 1347.0,1120.6 1345.8,1967.9 1280.7,2026.6 326.5,2015.4 170.8,1946.8 105.5,1949.8 106.8,155.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0691/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[702.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6125614,39.3133956]}},{"type":"Feature","properties":{"resourceCoords":[1348.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6110748,39.3134548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0692/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p692","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0692/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0692","type":"ImageService3","width":1455,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.1,1117.7 143.1,758.0 143.0,164.0 1272.2,161.4 1277.8,520.4 1278.5,1275.5 1276.9,1869.8 1315.0,1868.8 1243.0,1957.6 971.5,1996.7 173.8,1927.8 144.0,1954.8 143.1,1117.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0692/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[143.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.611011,39.3124452]}},{"type":"Feature","properties":{"resourceCoords":[143.0,164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6111386,39.3144637]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0693/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p693","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0693/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0693","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"36.1,1883.7 41.0,1290.0 44.5,535.8 41.0,177.0 232.5,177.7 1006.5,180.2 1037.1,196.2 1163.6,304.6 1169.5,298.1 1223.5,284.5 1223.9,361.4 1421.4,548.0 1424.8,775.0 1386.3,861.0 1395.9,1808.5 1387.2,1807.5 1184.7,1953.5 1016.0,1892.0 89.8,1863.9 74.2,1882.9 36.1,1883.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0693/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[41.0,1290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.608367,39.3125607]}},{"type":"Feature","properties":{"resourceCoords":[41.0,177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6085085,39.314568]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0694/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p694","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0694/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0694","type":"ImageService3","width":1454,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,310.0 1.0,388.2 197.1,575.1 199.5,802.6 160.6,888.7 166.1,1838.2 931.5,1935.2 1249.9,1878.8 1256.8,1301.0 1263.4,1281.0 1252.3,439.2 1080.1,429.5 1038.3,247.1 973.3,205.8 989.3,1.0 934.5,1.0 731.3,222.7 451.3,240.5 500.2,186.9 1.0,310.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0694/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[603.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6041189,39.3117029]}},{"type":"Feature","properties":{"resourceCoords":[312.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.604962,39.3138582]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0695/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p695","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0695/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0695","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"141.2,452.0 170.3,198.5 189.8,177.5 177.6,135.3 473.1,155.5 820.0,75.2 1417.3,167.6 1426.8,176.4 1425.9,301.1 1425.5,365.1 1336.0,462.0 1331.6,714.0 1421.1,796.2 1426.3,801.0 1426.8,850.1 1402.9,875.2 1388.4,1279.2 1427.6,1314.1 1427.3,1354.0 1427.1,1395.7 1388.8,1395.2 1405.9,1957.2 1382.4,1953.8 1319.3,2008.9 46.6,1951.8 58.8,1380.3 65.5,1360.6 62.1,527.9 141.2,452.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0695/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[451.0,2021.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60165568034832,39.31172484770074]}},{"type":"Feature","properties":{"resourceCoords":[1476.0,798.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59944303368671,39.3140748991525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0696/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p696","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0696/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0696","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.6,1258.8 109.4,1294.0 110.4,1377.8 71.1,1378.0 98.8,1954.9 581.7,2015.5 1399.8,1929.6 1401.6,1261.9 1414.9,1272.6 1244.5,1022.0 1276.1,1047.0 1219.2,713.7 1268.6,714.1 1428.7,530.6 1427.6,324.3 1427.5,299.8 1280.8,163.6 1183.3,273.9 1143.7,238.4 878.4,1.0 835.2,1.0 788.6,53.8 785.3,91.4 706.7,140.8 420.2,80.7 257.3,141.0 78.2,116.5 88.1,125.5 90.1,319.3 1.0,419.2 1.0,680.2 93.4,762.2 98.8,767.0 100.2,817.3 76.1,843.6 68.6,1258.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0696/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[849.0,-8.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59793118905331,39.31550297017187]}},{"type":"Feature","properties":{"resourceCoords":[1179.0,282.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59714217425969,39.315018727993284]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0697/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p697","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.03"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0697/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0697","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.0,1327.6 218.8,1337.3 68.4,1112.3 96.5,1134.9 47.9,836.9 92.1,837.6 236.2,674.9 236.8,468.9 106.8,346.2 414.3,3.7 415.0,13.0 443.4,12.2 441.4,146.7 1060.4,148.7 1183.5,489.2 1281.2,562.9 1272.0,1188.2 1199.1,1272.3 1186.5,1489.3 1287.8,1502.0 1337.7,1579.7 1286.8,1984.9 345.5,1909.7 200.7,1923.7 207.0,1327.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0697/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1086.0,1955.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5941727,39.3121601]}},{"type":"Feature","properties":{"resourceCoords":[-941.0,1955.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5993684,39.311926]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0698__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p698 [3]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"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":"2481.2"},{"label":"split_canvas_w","value":"5776.0"},{"label":"split_canvas_h","value":"5786.8"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0698__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0698","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1371.6,1107.8 1372.9,909.6 1382.3,910.0 1344.0,760.4 1227.2,724.5 938.1,716.6 961.1,843.9 876.5,898.8 185.1,921.5 188.8,953.1 115.7,969.8 106.2,1062.0 75.8,1083.5 51.4,1062.8 32.4,1981.8 88.9,2036.8 1238.8,2045.7 1380.7,2031.0 1404.2,1944.0 1366.2,1944.3 1371.6,1107.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0698__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[624.0,1462.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.590497,39.3132069]}},{"type":"Feature","properties":{"resourceCoords":[624.0,1949.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5904364,39.3123216]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0699__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p699 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5784.0"},{"label":"split_canvas_h","value":"4175.2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0699__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0699","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.9,1026.4 200.6,1026.1 204.8,1010.7 1366.3,983.6 1308.8,116.4 706.6,47.5 202.0,87.3 180.0,1.0 169.5,1.0 168.2,193.6 162.9,1026.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0699__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[153.0,553.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5887754540626,39.313263624123906]}},{"type":"Feature","properties":{"resourceCoords":[663.0,553.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58757181258252,39.31331296368775]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0701/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p701","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0701/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0701","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1319.8,836.3 1331.1,835.9 1347.7,1449.2 1342.8,1449.4 1363.9,2014.0 1299.3,2032.5 1304.1,2015.6 296.6,2007.6 131.8,1874.0 94.1,1522.0 157.0,454.9 483.6,195.3 484.4,160.2 1295.2,178.8 1319.8,836.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0701/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1342.0,1144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62196891474649,39.31560865860701]}},{"type":"Feature","properties":{"resourceCoords":[639.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62363256814092,39.317508113135325]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0702/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p702","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0702/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0702","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1194.2,1989.4 748.7,1988.7 748.6,1999.0 181.8,1966.5 177.6,1443.3 182.3,1443.3 183.8,850.4 172.8,850.5 166.9,112.8 1195.1,38.4 1195.2,86.7 1194.8,816.6 1191.7,1440.8 1193.5,1855.2 1194.2,1989.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0702/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[173.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62200133875606,39.31564825875753]}},{"type":"Feature","properties":{"resourceCoords":[173.0,844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62203634056708,39.31616346245076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0703/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p703","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0703/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0703","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.7,28.7 1327.2,29.4 1329.0,858.0 1326.2,1172.3 1329.7,2026.8 166.9,2027.8 165.4,1873.0 161.4,1454.0 161.4,822.6 158.2,84.5 157.7,28.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0703/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1329.0,858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.616896,39.316348]}},{"type":"Feature","properties":{"resourceCoords":[1041.0,2027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6174389,39.314211]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0704/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p704","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"27"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0704/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0704","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"117.2,1166.5 122.2,851.0 126.4,19.4 1312.0,27.7 1311.5,864.5 1307.1,1185.8 1303.5,2025.8 801.0,2024.0 114.4,2024.0 117.2,1166.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0704/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6153047,39.3164065]}},{"type":"Feature","properties":{"resourceCoords":[461.0,2024.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6159584,39.3142704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0705/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p705","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0705/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0705","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"121.7,1188.3 123.4,868.8 117.3,36.8 1342.5,34.0 1346.7,2017.9 747.7,2019.6 124.8,2023.3 121.7,1188.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0705/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[708.0,854.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61276103978075,39.31651737928088]}},{"type":"Feature","properties":{"resourceCoords":[414.0,854.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61344921763695,39.316492463393935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0706/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p706","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0706/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0706","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1201.7,2024.0 78.4,2028.3 75.5,45.4 888.4,44.0 879.4,283.7 857.5,682.2 1077.0,690.4 1167.1,869.5 1155.5,869.3 1375.9,1536.4 1363.3,1540.3 1378.8,1718.5 1392.4,2023.3 1201.7,2024.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0706/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[78.0,1048.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61124837458156,39.31623975149862]}},{"type":"Feature","properties":{"resourceCoords":[78.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61135811186598,39.318029753554534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0707/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p707","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0707/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0707","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.3,362.3 75.0,358.1 104.2,651.1 68.7,971.3 149.9,1273.8 120.9,1710.2 261.6,1929.1 401.4,1987.1 602.2,2014.0 795.4,1954.5 1298.1,2008.7 1301.5,2053.8 1406.2,1526.4 1428.6,1517.0 1428.7,1503.7 1416.4,1475.1 1428.9,1412.1 1427.0,14.0 1362.0,13.0 1361.1,1.0 1346.6,1.0 1223.9,59.1 1224.0,79.0 1083.1,78.5 765.2,82.4 654.3,83.0 118.0,84.2 85.0,84.3 1.0,85.0 1.0,127.8 19.3,162.7 31.5,197.7 37.8,234.3 37.0,280.9 28.4,338.6 44.1,346.6 46.3,362.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0707/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[657.0,535.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6291499,39.327031]}},{"type":"Feature","properties":{"resourceCoords":[1224.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6265926,39.328759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0708__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p708 [2]","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":"5788.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0708__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0708","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"202.6,237.8 82.6,785.3 68.0,1242.6 101.3,1435.8 128.8,1478.8 247.8,1493.5 422.6,1890.3 417.2,1978.8 422.4,1989.2 813.6,2012.8 813.7,1961.1 1335.8,1927.5 1335.8,1924.0 1337.7,1812.6 1341.4,1357.1 1345.6,1060.2 1350.0,531.6 1351.3,440.6 1423.8,362.8 1423.0,21.0 1415.0,16.0 1359.0,16.0 1357.1,1.0 863.8,1.0 868.8,10.5 875.0,49.1 610.2,151.1 591.0,115.0 459.3,1.0 254.5,1.0 213.8,186.6 230.2,226.9 202.6,237.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0708__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[613.0,810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62339858344363,39.32159606198081]}},{"type":"Feature","properties":{"resourceCoords":[614.0,127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62358615265033,39.32405333373509]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0709__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p709 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5788.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0709__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0709","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"147.8,1961.4 738.8,1958.8 1335.8,1955.8 1333.9,1544.4 1331.0,1190.0 1329.0,815.3 1325.8,584.2 1322.6,100.0 1050.0,102.2 897.4,101.8 726.4,102.7 726.4,122.4 694.7,131.9 694.5,100.6 643.0,123.6 643.0,411.5 599.2,411.5 187.2,411.5 136.7,467.6 137.0,559.3 142.1,1091.5 143.2,1390.6 147.6,1849.2 147.8,1961.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0709__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[906.0,1176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61637361578676,39.32066999572271]}},{"type":"Feature","properties":{"resourceCoords":[1078.0,1176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61557857141389,39.32069621225294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0710/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p710","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0710/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0710","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"498.8,106.0 591.9,105.6 773.6,107.1 967.8,107.0 1315.7,110.1 1314.5,129.7 1311.2,193.6 1300.3,388.8 1292.4,494.5 1261.7,938.4 1255.5,1014.2 1251.2,1087.4 1235.6,1362.5 1217.6,1708.5 1203.2,1959.1 793.3,1956.1 175.8,1951.7 179.5,1542.3 181.4,1189.7 184.6,816.8 184.6,586.8 188.0,104.9 498.8,106.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0710/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[477.0,1170.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61303971352083,39.320814989869234]}},{"type":"Feature","properties":{"resourceCoords":[968.0,110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61103786730713,39.324720769330156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0711/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p711","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0711/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0711","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.5,1230.7 61.2,1224.4 148.9,1178.8 301.4,719.3 294.1,611.4 291.6,314.6 289.2,218.3 282.5,185.8 309.7,181.7 748.2,77.8 1271.7,155.8 1348.8,191.4 1354.3,489.1 1295.8,932.3 1343.8,1788.3 1391.2,1856.9 1048.1,1801.9 1052.9,1774.8 760.9,1851.5 760.5,1850.7 450.2,2003.2 446.7,1996.2 414.1,1928.4 218.1,1533.8 171.9,1439.5 83.4,1267.3 64.5,1230.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0711/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60707296563511,39.328724157859305]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60109063780051,39.3263341539357]}},{"type":"Feature","properties":{"resourceCoords":[1442.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.60548827662492,39.31965379654685]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.61147060445953,39.32204380047046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0712__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p712 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5804.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0712__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0712","type":"ImageService3","width":1451,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1124.1,1918.7 1101.5,1947.2 1240.8,1928.5 1335.2,1810.2 1362.2,1808.3 1363.0,1716.7 1288.0,1717.5 1269.0,1698.9 1291.3,1679.9 1282.6,1680.0 1279.8,1677.2 1231.2,1665.5 1211.8,1609.5 1196.7,1594.6 1140.2,1568.9 1126.7,1546.0 1135.1,1527.3 1134.8,1527.0 1133.2,1525.3 904.7,1290.0 1041.6,1104.8 1025.0,943.8 975.1,839.2 1058.7,572.1 1060.7,403.3 966.4,351.8 966.0,348.9 682.9,144.2 699.3,122.0 403.0,59.4 403.0,58.4 56.4,56.1 56.9,121.5 59.6,397.1 64.7,743.5 67.0,994.5 69.4,1115.4 70.0,1316.7 180.8,1314.4 231.3,1401.9 225.5,1402.2 355.8,1731.6 349.6,1734.0 362.5,1823.2 378.2,1976.3 766.1,1952.4 782.0,1959.4 848.9,2009.7 851.6,2006.2 1124.1,1918.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0712__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[239.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60862584521841,39.32088947369125]}},{"type":"Feature","properties":{"resourceCoords":[61.0,1404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60950958146663,39.316655629550546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0714__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p714 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5792.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0714__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0714","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1379.4,1948.3 1375.4,1696.5 1390.2,1689.0 1382.2,1680.2 1363.0,145.0 1356.5,129.3 1356.2,85.0 815.7,93.0 815.7,95.3 437.7,84.2 437.9,99.9 139.3,68.6 85.2,100.2 52.0,170.9 117.4,723.8 93.1,811.2 152.5,824.9 156.6,864.9 188.3,875.5 496.8,868.6 530.4,821.7 902.6,823.3 989.0,939.9 987.5,1966.9 1115.8,2005.7 1150.1,2050.6 1157.2,2050.6 1165.2,2050.5 1164.8,2022.3 1354.5,2020.5 1380.5,2020.3 1379.4,1948.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0714__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[439.0,365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59560389569481,39.32184318530976]}},{"type":"Feature","properties":{"resourceCoords":[1374.0,2008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59712016904992,39.31508286432194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0715/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p715","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0715/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0715","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"176.8,935.5 146.2,951.4 174.3,961.5 192.1,1291.2 167.8,1292.6 176.2,1443.7 141.3,1446.4 138.0,1390.6 65.0,1465.0 1.0,1470.0 1.0,2052.0 21.0,2052.0 22.0,2057.0 127.6,2054.9 124.1,1989.8 174.6,1963.8 176.5,1995.4 207.8,1984.0 206.8,1964.2 378.5,1954.1 531.9,1946.2 805.7,1929.3 1119.3,1909.3 1213.3,1902.6 1396.7,1891.8 1376.0,1527.4 1336.3,902.3 1322.6,658.0 1379.9,701.6 1394.5,462.9 1318.6,405.8 1397.8,297.5 1405.2,189.8 1427.2,172.3 1257.6,136.7 1227.5,172.2 1040.8,55.9 985.9,125.0 738.7,68.5 732.8,85.0 709.6,136.6 701.4,190.4 675.5,173.4 648.0,166.4 627.4,151.1 466.1,173.4 460.6,79.3 469.5,56.7 495.2,53.2 471.7,34.6 445.2,14.0 437.0,14.0 434.6,37.5 394.1,130.8 371.3,177.3 128.8,180.2 131.9,229.4 146.7,493.3 137.9,545.6 119.3,562.6 125.8,656.7 157.1,655.1 178.5,654.0 176.8,935.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0715/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[499.0,926.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61601904134221,39.328161338714416]}},{"type":"Feature","properties":{"resourceCoords":[1066.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61342966337429,39.32692999104335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0716/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p716","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0716/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0716","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2.8,1314.3 111.8,1402.1 152.6,939.0 8.1,824.3 167.5,617.9 187.4,409.1 509.0,185.7 507.8,214.8 501.1,231.6 1187.8,330.6 1188.0,309.4 1237.3,310.9 1291.2,975.1 1182.9,979.3 1180.7,1262.2 1256.5,1270.5 1287.5,1657.5 1177.7,1657.5 1177.0,1754.4 825.7,1765.8 16.9,1789.7 2.8,1314.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0716/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1187.0,985.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60942997565735,39.329718183852194]}},{"type":"Feature","properties":{"resourceCoords":[1187.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60943919931454,39.330181108344554]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0717/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p717","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0717/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0717","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"958.9,50.5 1317.2,36.0 1320.4,564.4 1319.8,759.0 1304.0,1997.7 607.0,2025.9 218.2,2045.2 190.2,1322.2 134.0,81.8 958.9,50.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0717/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[613.0,1308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61103769170737,39.32601919845886]}},{"type":"Feature","properties":{"resourceCoords":[180.0,713.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61205160902041,39.327081025685224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0718/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p718","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0718/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0718","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"482.9,27.4 476.9,69.5 1230.8,70.2 1224.1,264.6 1276.5,354.1 1403.5,396.0 1386.0,460.3 1303.2,634.9 1038.8,1168.1 953.9,1367.9 266.7,2051.1 209.0,2051.0 206.5,2051.6 69.5,2052.7 69.3,2022.5 69.4,1983.5 73.4,754.5 72.2,561.4 64.0,37.1 482.9,27.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0718/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[352.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60875758917102,39.326669072469045]}},{"type":"Feature","properties":{"resourceCoords":[436.0,634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6085594958715,39.327229235278075]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0719__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p719 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"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":"3346.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0719__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0719","type":"ImageService3","width":1435,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.5,810.9 738.8,832.1 1386.6,783.6 1416.6,299.8 1396.8,59.7 1300.8,70.0 1242.2,133.7 1158.8,108.3 1016.8,146.6 825.1,74.9 751.6,101.2 555.6,76.1 510.2,136.5 416.3,163.6 103.8,81.4 75.9,172.0 125.3,293.9 44.6,727.6 75.5,810.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0719__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[713.0,561.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6488139391203,39.3328656422989]}},{"type":"Feature","properties":{"resourceCoords":[1055.0,561.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6473290097607,39.33327099872045]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0721__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p721 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.36"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4186.8"},{"label":"split_canvas_w","value":"5780.0"},{"label":"split_canvas_h","value":"4081.2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0721__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0721","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1445.0,2067.0 1445.0,1046.7 1087.0,1075.6 1086.4,1163.9 1085.7,1244.5 916.6,1244.5 0.0,1244.5 0.0,2067.0 1445.0,2067.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0721__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[529.0,1903.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62960773284355,39.32293587034635]}},{"type":"Feature","properties":{"resourceCoords":[781.0,1903.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62923930590847,39.323299780602504]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0722__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p722 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.91"},{"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":"5780.0"},{"label":"split_canvas_h","value":"7316.8"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0722__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0722","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.7,19.9 66.7,159.5 95.5,410.1 35.6,670.2 63.9,795.0 23.6,1119.0 39.0,1248.4 243.9,1373.3 445.6,1383.5 1034.1,1657.6 1348.9,1734.9 1390.2,1507.1 1368.2,1160.9 1362.2,1120.4 1357.9,1011.2 1358.0,999.4 1358.4,958.8 1363.0,630.5 1368.2,540.4 1379.8,521.1 1380.3,479.8 1385.8,41.4 1239.3,41.2 973.4,42.5 977.8,24.9 435.5,33.2 435.1,22.6 214.4,18.5 214.4,14.6 84.7,19.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0722__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[646.0,521.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6381733,39.3302563]}},{"type":"Feature","properties":{"resourceCoords":[216.0,521.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.640083,39.3298937]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0723/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p723","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0723/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0723","type":"ImageService3","width":1457,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"810.4,2029.9 448.7,1946.7 449.1,1979.0 280.9,1336.2 254.7,1262.2 206.5,1058.5 188.2,959.8 76.4,340.9 53.2,169.5 67.9,129.0 53.7,51.2 541.0,46.0 1021.0,46.0 1323.6,46.0 1330.8,46.0 1281.2,1435.0 1268.2,1435.0 1102.1,1435.3 1101.5,1515.2 1138.7,1587.4 1162.0,1656.0 1173.9,1727.5 1171.7,1818.6 1153.9,1931.3 1184.6,1947.3 1188.6,1978.0 810.4,2029.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0723/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[541.0,46.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6337957,39.33107]}},{"type":"Feature","properties":{"resourceCoords":[1021.0,46.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6326512,39.3311125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0724/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p724","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0724/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0724","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"147.0,1460.3 94.2,1459.5 156.4,38.7 412.1,40.0 829.7,41.1 1233.0,44.5 1219.6,1474.3 147.0,1460.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0724/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,766.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.631164,39.329858]}},{"type":"Feature","properties":{"resourceCoords":[1223.0,1116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6292874,39.3293069]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0725/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p725","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0725/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0725","type":"ImageService3","width":1452,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.4,261.7 551.2,168.4 629.2,145.8 1347.3,145.1 1345.8,526.5 1347.6,969.2 1345.9,1230.8 1351.8,1550.9 1354.0,1876.0 863.5,1874.0 365.5,1877.2 215.1,1032.2 76.4,261.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0725/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[650.0,530.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6344574,39.3334749]}},{"type":"Feature","properties":{"resourceCoords":[1354.0,1876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6326512,39.3311125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0726/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p726","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0726/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0726","type":"ImageService3","width":1459,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.8,1871.2 612.7,1875.5 351.9,1877.5 45.0,1879.0 40.0,1556.2 31.2,1238.5 30.6,978.9 24.9,539.4 23.0,160.7 827.5,152.9 1207.8,149.2 1407.5,147.2 1419.0,553.4 1423.4,776.9 1426.7,1869.5 1026.8,1871.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0726/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[635.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6313563,39.3328045]}},{"type":"Feature","properties":{"resourceCoords":[45.0,1879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6326512,39.3311125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0727__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p727 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"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":"3171.2"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0727__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0727","type":"ImageService3","width":1459,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.7,1942.8 220.3,1943.3 540.4,1942.5 682.2,1944.4 682.3,1924.3 789.6,1874.8 784.2,1525.9 769.7,594.3 672.4,538.1 546.1,465.1 546.1,305.6 546.1,1.0 462.8,1.0 461.9,9.0 439.9,9.0 439.0,1.0 311.8,1.0 309.9,13.0 292.9,13.0 287.9,9.0 287.9,1.0 279.9,1.0 278.9,13.0 40.0,9.0 34.7,9.4 36.0,114.2 1.0,202.2 1.0,348.9 6.3,348.9 107.7,348.6 112.1,554.9 113.5,668.4 111.2,1223.1 108.7,1942.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0727__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[108.0,1223.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62941935720163,39.33123823239876]}},{"type":"Feature","properties":{"resourceCoords":[683.8,1939.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62658631812408,39.32877853883392]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p728 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6452.0"},{"label":"split_canvas_w","value":"1570.0"},{"label":"split_canvas_h","value":"1816.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728","type":"ImageService3","width":1465,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.6,1927.2 120.3,1964.5 390.6,1879.8 386.9,1840.8 390.2,1821.0 389.1,1662.3 388.7,1613.0 124.1,1613.0 21.2,1613.0 14.0,1613.0 15.0,1840.0 103.6,1927.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1613.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62435893312372,39.325170591589284]}},{"type":"Feature","properties":{"resourceCoords":[392.5,1613.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62254014391347,39.32534658979873]}},{"type":"Feature","properties":{"resourceCoords":[392.5,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.62227735598185,39.323720996849474]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6240961451921,39.32354499864003]}},{"type":"Feature","properties":{"resourceCoords":[111.8,1946.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6236453,39.3240269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p728 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.70"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5860.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728","type":"ImageService3","width":1465,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"821.5,1.0 490.9,1.0 490.0,12.0 444.0,12.0 440.3,1.0 398.9,1.0 398.0,12.0 380.0,12.0 379.1,1.0 372.9,1.0 372.0,12.0 354.0,12.0 353.1,1.0 344.8,1.0 343.0,12.0 323.0,12.0 322.1,1.0 321.6,1.0 318.0,11.0 295.0,11.0 294.1,1.0 285.9,1.0 285.0,11.0 46.0,9.0 45.1,1.0 25.8,1.0 24.0,11.0 1.0,12.9 1.0,456.1 10.0,457.0 12.0,481.0 9.0,647.0 1.0,647.9 1.0,660.4 10.0,664.0 10.0,876.0 1.0,876.9 1.0,881.1 10.0,882.0 10.0,921.0 1.0,921.9 1.0,947.1 10.0,948.0 10.0,996.0 1.0,996.9 1.0,1053.1 11.0,1054.0 11.0,1080.0 1.0,1080.9 1.0,1081.2 11.0,1083.0 11.0,1102.0 1.0,1102.9 1.0,1125.1 11.0,1126.0 12.0,1206.0 1.0,1206.9 1.0,1409.1 15.0,1411.0 14.0,1535.0 1.0,1535.9 1.0,1543.0 12.0,1543.0 13.9,1613.0 389.2,1613.0 392.4,2053.0 1187.2,2054.5 1250.3,1999.6 1249.2,2054.7 1283.7,2054.7 1287.1,1905.7 1311.0,1906.2 1319.1,1581.0 1292.3,1569.0 1323.5,1555.8 1346.9,1279.4 1325.8,1278.8 1295.0,1278.0 1295.8,1185.2 1315.3,1169.8 1328.0,1119.2 1333.9,859.0 1336.7,687.8 1344.5,401.7 1352.2,390.9 1298.2,338.3 1303.8,299.7 1101.1,105.0 1081.0,124.2 1061.8,105.6 856.1,30.0 821.5,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0728__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1301.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6174955,39.3268729]}},{"type":"Feature","properties":{"resourceCoords":[1301.0,319.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6179942,39.3325901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0729__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p729 [2]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5816.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0729__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0729","type":"ImageService3","width":1454,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1063.8,1958.0 1089.1,1913.7 1134.6,1824.5 1138.3,1801.5 1171.2,1823.9 1193.1,1843.5 1167.7,1845.5 1157.6,1867.1 1157.2,1959.9 1317.0,1947.9 1336.3,1964.1 1362.9,1972.8 1387.4,1991.0 1398.7,1938.6 1416.4,1905.0 1374.3,1533.4 1368.8,1539.0 1367.9,1540.0 1386.8,1011.4 1431.3,932.2 1431.3,901.2 1431.2,879.7 1405.2,931.5 1414.6,428.8 1401.3,428.7 1410.2,74.4 1417.8,74.5 1415.4,66.4 794.0,34.5 794.0,58.0 457.2,39.5 457.2,45.1 382.4,35.9 382.5,13.0 370.0,13.0 366.3,1.0 359.9,1.0 359.0,9.0 330.0,12.0 329.1,6.2 321.1,8.9 320.0,12.0 311.8,11.9 135.3,70.0 1.0,64.1 1.0,903.2 104.8,987.4 334.5,1173.8 541.2,1246.0 560.7,1264.3 580.5,1244.8 786.2,1436.1 781.3,1474.7 836.1,1526.4 828.6,1537.4 825.4,1823.4 825.4,1945.9 1063.8,1958.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0729__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[794.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6181564,39.3357679]}},{"type":"Feature","properties":{"resourceCoords":[794.0,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6182759,39.3375752]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0730/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p730","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0730/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0730","type":"ImageService3","width":1455,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.0,1933.7 78.0,1561.1 72.7,1566.8 71.7,1567.8 85.5,1037.1 129.5,957.3 128.9,904.5 103.3,956.8 107.8,452.2 94.5,452.2 100.0,96.6 107.6,96.5 166.9,95.9 269.1,90.2 435.7,70.6 441.2,95.1 904.0,74.5 899.9,63.2 985.4,70.9 1098.7,65.9 1098.2,56.6 1347.2,96.0 1323.2,512.5 1349.6,513.1 1332.2,1051.7 1325.4,1263.3 1300.0,2018.8 1299.6,2029.5 951.9,1970.1 955.5,1961.6 956.5,1946.9 814.1,2040.4 647.1,1996.0 615.6,2029.6 437.4,1905.1 379.6,1970.5 138.8,1901.9 132.1,1917.9 124.0,1933.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0730/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[457.0,972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61357319183196,39.33459266919388]}},{"type":"Feature","properties":{"resourceCoords":[1096.0,527.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61068814541692,39.33628818956373]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0731/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p731","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0731/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0731","type":"ImageService3","width":1454,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"94.8,471.1 98.8,471.4 98.2,290.6 94.5,120.6 448.3,114.9 483.1,99.2 730.8,125.4 750.5,177.7 1103.9,43.4 1103.0,79.9 1192.8,114.6 1222.1,190.0 1361.1,191.4 1393.8,304.4 1412.6,680.4 1379.6,2004.2 1119.4,1938.0 1117.4,1932.2 519.3,1854.8 517.8,1957.2 96.3,1959.6 96.7,1419.5 70.2,1419.7 94.8,471.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0731/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[805.0,1140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60623637368569,39.33740470289626]}},{"type":"Feature","properties":{"resourceCoords":[101.0,357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60954059553237,39.34019107937808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0732/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p732","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0732/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0732","type":"ImageService3","width":1462,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"82.2,1837.7 137.8,1837.6 121.9,1641.6 83.5,1637.5 84.5,1494.2 139.3,1492.0 111.7,1155.7 86.7,1155.0 91.7,402.3 92.7,191.4 511.5,190.9 513.5,89.2 1107.5,168.8 1109.4,174.5 1367.7,241.3 1362.5,415.1 1406.6,1248.2 1371.2,1897.2 1362.8,1956.8 1310.2,1986.0 1045.2,1978.4 930.3,1924.5 665.5,1909.5 665.3,1913.0 288.2,1906.4 291.5,1885.3 81.9,1886.7 82.2,1837.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0732/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1325.0,1476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6036457029245,39.329858607298135]}},{"type":"Feature","properties":{"resourceCoords":[84.0,198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6095290386058,39.334412434126264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0733/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p733","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0733/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0733","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.2,1490.1 24.8,1482.1 9.6,1484.1 12.8,1563.6 1.0,1571.2 1.0,1757.5 13.8,1993.0 30.9,2018.5 32.7,2066.0 291.0,2066.0 292.0,2049.0 327.0,2049.0 329.0,2049.0 670.5,2049.9 817.4,1994.4 847.6,1995.8 848.2,1986.8 858.9,1999.4 870.9,1985.8 872.4,2021.9 948.0,2027.8 947.8,2022.2 1287.2,2026.0 1286.2,2002.3 1394.5,2003.2 1391.6,1763.3 1394.1,1762.9 1385.7,1466.1 1393.8,1458.2 1383.2,1149.8 1317.8,1096.8 1318.0,1062.3 1357.9,1094.9 1386.8,1119.6 1394.2,878.9 1389.7,884.2 1394.5,548.4 1399.6,551.0 1387.3,56.6 1080.5,39.3 948.8,64.7 791.0,44.7 674.3,70.2 114.3,66.1 112.8,1.0 101.5,1.0 101.6,187.7 93.3,192.0 105.3,444.1 101.8,442.2 101.8,595.6 106.0,591.5 114.3,584.6 113.5,1024.4 121.9,1039.0 83.1,1489.5 62.4,1480.2 61.2,1490.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0733/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[214.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62331056168937,39.34304779979506]}},{"type":"Feature","properties":{"resourceCoords":[1280.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61832177484203,39.338526045133946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p734 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"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":"5856.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734","type":"ImageService3","width":1464,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.4,1146.9 77.3,1454.3 69.3,1462.2 79.0,1758.2 76.5,1758.5 80.5,1997.7 597.0,1999.3 599.7,2007.2 659.0,2004.2 760.9,1994.7 926.6,1968.6 933.0,1992.9 1394.7,1954.5 1323.5,1777.9 1381.6,1724.0 1411.3,1328.9 1443.6,1287.0 1443.8,1268.7 1406.9,1241.4 1333.1,1173.2 1295.7,1132.5 1063.5,1143.0 992.4,1135.3 973.7,1105.3 793.8,1104.8 793.4,1103.0 789.6,1103.0 789.6,1085.8 753.1,921.0 776.6,565.0 750.6,478.6 751.8,92.6 64.7,56.9 79.2,549.7 74.1,547.1 70.8,882.0 75.2,876.7 68.8,1116.8 40.0,1092.2 1.0,1060.7 1.0,1095.2 65.4,1146.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[474.0,1638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61595660958541,39.33901607268972]}},{"type":"Feature","properties":{"resourceCoords":[767.0,1491.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6145952368065,39.33954812945378]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p734 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3158.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2697.6"},{"label":"split_canvas_h","value":"4412.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734","type":"ImageService3","width":1464,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"799.5,290.9 839.1,329.9 916.8,394.8 955.2,420.4 956.0,438.8 925.8,482.6 916.1,881.7 860.4,938.9 935.9,1102.0 1022.4,1102.0 1135.5,1086.8 1134.2,1077.5 1387.3,1094.6 1370.3,561.3 1374.2,561.4 1363.2,379.9 1349.5,209.6 1338.4,174.1 1336.0,115.3 1117.8,15.1 1119.1,38.0 992.9,44.7 876.2,75.5 817.0,180.4 799.5,290.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0734__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1114.3,513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61073522515619,39.339997417823604]}},{"type":"Feature","properties":{"resourceCoords":[946.5,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61140631178252,39.34169957557755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0735__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p735 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"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":"5800.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0735__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0735","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1425.2,242.4 1313.8,219.0 1280.8,158.6 1135.9,86.1 825.4,93.2 903.0,376.6 1008.0,566.6 995.6,915.0 959.1,979.8 956.0,980.5 956.0,983.0 946.1,983.0 818.2,1014.9 388.4,1027.4 235.2,1121.0 151.2,1103.3 107.7,1201.0 47.3,1741.5 65.5,1890.2 115.3,1961.8 112.7,1989.2 239.5,1979.8 239.7,1983.7 455.6,1980.4 456.4,1990.8 986.5,1965.1 982.9,1982.5 1242.9,1972.6 1386.2,1968.0 1377.3,1576.7 1360.0,859.9 1352.0,776.2 1344.0,742.9 1388.9,467.4 1386.0,467.9 1386.7,291.3 1424.7,279.5 1425.2,242.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0735__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[924.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63929747982681,39.33869700175794]}},{"type":"Feature","properties":{"resourceCoords":[1369.0,1434.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63600362955367,39.33440315340518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0736/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p736","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0736/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0736","type":"ImageService3","width":1457,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1437.7,1809.5 1434.2,1184.3 1426.1,1180.8 1399.0,614.6 1398.0,614.6 1430.9,570.0 1430.4,490.4 1399.0,486.5 1401.2,350.7 1181.2,196.2 1129.0,223.2 1027.3,331.4 1013.0,341.0 973.5,280.9 924.7,223.2 898.9,198.6 632.0,163.0 638.7,193.1 396.2,34.0 399.8,50.8 381.3,54.8 1.0,247.8 1.0,264.4 79.2,271.1 62.9,712.7 42.2,711.4 47.1,748.3 11.2,765.5 36.0,940.8 38.9,940.0 34.3,1219.8 47.2,1251.7 67.2,1333.6 188.5,2042.3 427.0,1997.9 466.2,1987.0 826.3,1990.3 1232.6,1994.0 1418.4,1995.8 1420.1,1852.3 1437.7,1809.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0736/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[410.0,1769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6348774319201,39.33493760028262]}},{"type":"Feature","properties":{"resourceCoords":[314.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63548296915324,39.336890400927885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0737/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p737","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0737/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0737","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"916.1,1922.4 808.5,1980.8 327.6,2010.5 176.3,1983.5 99.3,1890.5 56.5,1683.1 62.3,1394.7 108.3,1176.8 105.7,1032.6 220.3,1022.4 217.8,856.0 163.0,777.9 99.5,359.6 85.8,358.6 169.0,288.9 155.2,230.7 577.2,176.1 597.8,153.9 623.0,182.0 801.1,164.9 804.0,181.1 951.3,118.5 950.5,111.5 1101.7,137.8 1100.4,118.7 1284.7,132.1 1274.0,12.6 1289.5,13.0 1304.1,13.3 1304.3,24.2 1316.7,149.7 1350.7,404.1 1321.1,408.2 1367.1,736.7 1392.3,933.5 1369.5,944.1 1357.9,1614.5 1379.3,1692.6 1361.2,1697.6 995.8,1909.0 996.6,1924.8 916.1,1922.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0737/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[996.0,447.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63727437073653,39.345648150353405]}},{"type":"Feature","properties":{"resourceCoords":[1283.0,1285.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63589142324415,39.34259880747606]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0738/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p738","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0738/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0738","type":"ImageService3","width":1460,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"383.0,1816.3 391.5,1846.2 139.1,1700.7 121.6,1637.9 131.4,956.0 154.7,945.1 128.4,745.0 80.7,411.0 110.8,406.6 75.4,148.0 252.5,89.7 253.5,98.1 411.1,96.3 410.8,94.5 565.5,75.9 566.0,79.5 716.1,57.8 714.8,49.0 714.1,43.0 1054.3,67.5 1054.6,71.5 1305.8,127.8 1316.8,282.7 1351.2,702.5 1337.9,745.1 1379.6,997.5 1386.8,1079.2 1371.3,1221.6 1346.0,1287.3 1335.3,1395.4 1334.2,1449.0 1338.5,1539.5 1352.0,1772.8 1359.8,1941.8 1367.6,2054.9 1169.2,2054.5 1165.3,1960.0 935.7,1817.8 885.0,1847.9 789.2,1962.3 775.4,1972.8 732.3,1914.8 680.0,1859.7 652.7,1836.5 383.0,1816.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0738/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[284.0,375.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63480004995164,39.34593075276064]}},{"type":"Feature","properties":{"resourceCoords":[1357.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62980604688829,39.34287799442037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0739/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p739","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0739/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0739","type":"ImageService3","width":1454,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.5,1963.8 176.3,1982.7 114.8,1768.5 108.0,1355.4 156.0,1289.0 177.2,1158.9 119.9,1101.2 91.2,981.5 101.1,148.1 114.2,90.8 399.6,92.9 477.1,49.9 703.4,27.4 1071.5,81.0 1069.4,97.7 1225.5,150.2 1278.1,121.5 1311.5,109.6 1332.2,181.2 1334.4,220.3 1330.2,583.8 1365.0,591.8 1366.1,1011.1 1340.3,1054.2 1329.5,1095.9 1331.8,1147.7 1346.8,1182.2 1366.6,1210.0 1367.5,1567.0 1332.8,1564.7 1346.6,1595.6 1351.2,1620.8 1355.6,1710.1 1349.1,1911.1 1195.3,1949.8 1195.0,1933.6 1018.1,1923.2 997.7,1891.8 974.1,1910.4 552.7,1899.5 557.4,1958.6 465.3,2014.2 242.5,1963.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0739/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1357.0,1676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63763976556599,39.347704365432556]}},{"type":"Feature","properties":{"resourceCoords":[883.0,1700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63984917656812,39.34733582967773]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0740/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p740","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0740/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0740","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"187.7,1717.4 180.2,1627.4 174.8,1602.0 159.8,1571.2 194.9,1572.5 182.1,1211.7 161.2,1184.2 144.9,1149.7 140.8,1097.5 150.3,1055.0 174.9,1010.5 159.9,586.7 124.4,579.8 116.6,212.2 113.0,172.8 89.7,101.2 98.0,98.1 584.7,41.8 628.4,56.8 986.0,231.6 1143.1,307.4 1204.6,337.8 1368.7,342.2 1312.9,456.9 1240.9,834.2 1294.5,859.6 1229.5,994.1 1215.5,1221.8 1264.2,1206.7 1310.5,1188.0 1299.0,1259.5 1258.7,1351.5 1229.7,1652.8 1234.1,1650.3 1228.6,1704.2 1202.8,1798.8 1190.2,1868.2 1184.4,1955.8 1184.2,1977.5 1184.4,1986.2 1035.0,1989.1 1035.0,1985.5 881.6,1984.8 881.6,1986.6 727.4,1969.1 727.4,1960.8 547.2,1996.2 550.2,1870.0 551.3,1859.0 521.5,1854.7 517.6,1974.8 336.0,1939.1 334.9,1958.3 187.8,1913.8 187.7,1717.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0740/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1184.0,1685.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63298689642959,39.348163107913045]}},{"type":"Feature","properties":{"resourceCoords":[465.0,448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6370932797432,39.35229368166714]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0741/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p741","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0741/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0741","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.6,1666.2 115.0,1595.3 137.8,1498.2 141.6,1443.3 137.2,1446.1 156.1,1138.9 193.9,1044.1 203.0,971.1 156.6,991.6 107.6,1008.7 113.9,777.0 175.2,638.0 119.9,614.1 179.9,228.3 232.6,109.8 392.4,108.6 919.4,102.8 919.6,142.9 1378.8,182.6 1378.9,186.2 1261.0,175.0 1166.6,332.4 1083.7,370.0 1061.8,560.8 1130.9,748.9 1139.6,1056.1 1285.4,1073.7 1350.8,981.5 1362.0,1024.2 1328.8,1493.8 1307.2,1522.1 1208.3,1527.8 1195.5,1662.8 1287.5,1769.8 1346.6,1999.7 987.9,1989.9 987.8,1996.2 683.0,1981.4 684.4,1909.2 439.0,1830.5 439.1,1826.4 102.2,1771.4 101.8,1755.4 104.6,1666.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0741/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[530.0,105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63156730459004,39.35321647375244]}},{"type":"Feature","properties":{"resourceCoords":[392.0,927.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63184447942257,39.35023811031662]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0742/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p742","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0742/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0742","type":"ImageService3","width":1451,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.0,2045.8 205.8,2044.1 310.2,2046.5 518.3,2036.4 540.5,2053.3 557.0,2053.4 630.8,2053.8 649.7,2035.3 978.5,2032.2 979.1,2012.5 1241.8,2056.9 1267.0,2057.0 1267.5,2061.2 1303.2,2066.0 1304.6,2056.1 1313.0,2066.0 1318.7,2066.0 1325.2,2066.0 1376.8,1616.4 1368.8,1601.6 1382.2,1161.6 1373.7,1168.3 1369.4,1172.2 1373.7,1018.8 1377.2,1020.7 1372.4,768.2 1380.8,764.1 1386.1,576.4 1397.4,576.7 1399.0,273.9 1357.0,80.4 733.6,39.1 731.5,32.6 373.1,43.9 373.4,50.2 68.4,53.2 71.7,136.3 92.9,557.2 78.2,599.5 112.0,853.1 116.7,935.0 96.7,1076.9 69.3,1141.8 55.3,1249.6 52.5,1303.1 53.9,1393.8 60.1,1627.5 62.6,1796.7 67.2,1922.2 1.0,1920.1 1.0,2006.6 164.5,2046.3 171.0,2045.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0742/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[682.0,1475.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62696217408603,39.34156100380706]}},{"type":"Feature","properties":{"resourceCoords":[59.0,1094.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62991168878062,39.342845897501945]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p744 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2504.4"},{"label":"split_canvas_w","value":"5776.0"},{"label":"split_canvas_h","value":"5763.6"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.3,1962.3 211.3,1927.1 243.0,1911.0 251.0,1907.2 727.7,1806.7 772.4,1817.5 1142.7,1957.7 1305.2,2018.3 1300.2,1978.2 1271.1,1800.9 1300.6,1799.6 1216.0,1291.3 1197.9,1177.1 1187.0,1067.4 1177.6,1088.1 1107.6,1085.6 398.2,831.3 76.4,760.6 51.1,848.2 75.0,1003.9 27.4,1809.6 49.4,1913.6 1.0,1912.7 1.0,1929.8 162.3,1962.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[578.0,1240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63758582090115,39.355870046493095]}},{"type":"Feature","properties":{"resourceCoords":[1269.0,1804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63421937095656,39.35389804886664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p744 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"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":"5776.0"},{"label":"split_canvas_h","value":"3980.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.2,654.2 918.0,994.0 1078.6,994.0 1118.7,993.8 1426.0,991.8 1421.0,568.0 1422.8,69.0 1165.8,22.6 1164.9,42.7 828.7,42.2 809.2,60.9 716.9,59.4 694.4,41.8 481.6,49.8 374.7,46.1 339.2,47.4 332.5,47.9 197.4,13.5 75.5,12.5 32.4,72.9 33.4,72.8 70.2,654.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0744__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1237.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62499469338135,39.33674171629212]}},{"type":"Feature","properties":{"resourceCoords":[44.0,695.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63043320383052,39.33713340382806]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p745 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4764.0"},{"label":"split_canvas_w","value":"5812.0"},{"label":"split_canvas_h","value":"3504.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745","type":"ImageService3","width":1453,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.0,1811.6 130.2,1893.1 152.3,1895.1 163.6,1896.1 163.7,1899.7 221.7,1905.5 233.6,2012.5 777.2,2010.5 681.2,1951.8 694.8,1817.2 718.0,1812.0 921.2,1855.0 997.0,1964.6 1369.5,2013.4 1392.5,1709.9 1333.7,1281.1 1200.7,1290.4 1123.6,1380.8 1011.5,1369.5 948.5,1283.9 720.5,1261.0 426.1,1299.3 213.4,1387.5 107.4,1376.8 108.2,1811.7 115.0,1811.7 131.0,1811.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1018.0,1979.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.62363208674182,39.35323761640661]}},{"type":"Feature","properties":{"resourceCoords":[1018.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6237101480919,39.35383786281225]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p745 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"5812.0"},{"label":"split_canvas_h","value":"4764.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745","type":"ImageService3","width":1453,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1431.0,1183.7 1430.9,1102.6 1415.0,1102.9 1408.2,1103.0 1402.8,670.1 1393.0,669.2 1353.2,192.7 1237.8,182.3 1085.8,78.5 894.9,31.4 216.1,26.7 58.8,65.2 28.6,123.6 33.8,235.3 45.9,352.1 104.2,871.8 74.2,871.5 94.0,1052.8 96.9,1093.7 160.1,1121.8 325.8,1119.8 484.4,1117.8 1007.6,1109.4 1008.1,1149.3 1397.8,1181.0 1415.0,1181.0 1415.2,1182.4 1431.0,1183.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0745__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[605.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63174281472484,39.35407918145361]}},{"type":"Feature","properties":{"resourceCoords":[555.0,396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.63217385609133,39.35577353047632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0749__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p749 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.11"},{"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":"5812.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0749__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0749","type":"ImageService3","width":1453,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.7,384.0 80.7,1067.2 45.7,1334.3 55.2,1415.8 41.6,1541.3 75.1,1955.4 112.4,2001.8 151.7,2016.2 300.6,1999.2 855.9,2011.0 1071.3,2034.5 1375.2,1996.8 1407.2,1809.7 1405.8,1591.2 1383.5,1536.6 1368.0,1329.1 1379.2,1121.0 1406.8,1026.4 1400.9,904.8 1373.9,883.1 1206.1,889.0 1178.4,877.9 1185.2,863.6 1054.2,867.0 1053.0,867.0 1053.7,821.0 1041.8,819.6 1020.7,756.5 1037.5,707.4 1032.1,557.4 921.3,379.1 921.0,126.0 876.2,104.7 849.7,67.9 643.4,53.1 432.3,66.8 304.1,49.7 81.4,64.5 57.4,156.4 45.7,384.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0749__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[404.0,1110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6641524,39.3608822]}},{"type":"Feature","properties":{"resourceCoords":[980.0,1110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6595837,39.3625665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0751/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p751","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0751/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0751","type":"ImageService3","width":1453,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"109.0,1805.5 131.8,1264.9 84.3,1197.0 72.8,715.6 128.3,488.9 123.4,313.5 183.7,273.3 186.0,113.0 158.2,80.7 404.4,65.0 404.5,96.0 562.4,114.6 1173.7,105.7 1178.5,68.0 1376.3,246.2 1358.9,245.8 1345.7,637.3 1406.2,835.9 1375.6,1141.3 1408.5,1440.3 1394.4,1929.8 1069.6,2051.5 1039.3,2051.4 1023.6,2009.5 777.9,1982.2 743.2,1997.8 391.9,2001.7 383.1,1966.0 384.4,1907.9 175.4,1795.6 175.2,1818.3 50.2,1817.1 109.0,1805.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0751/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[174.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6106142523513,39.34173935460653]}},{"type":"Feature","properties":{"resourceCoords":[404.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60965646568661,39.347960287823554]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0753/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p753","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0753/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0753","type":"ImageService3","width":1453,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.3,187.4 101.6,266.6 68.8,508.9 86.1,965.9 44.1,1541.0 113.0,1752.5 227.6,1804.2 258.1,1840.5 505.1,1828.0 504.8,1859.0 662.8,1879.7 1275.8,1878.7 1305.8,1668.7 1332.3,1478.1 1352.7,1341.3 1367.6,1343.7 1363.8,930.5 1357.5,929.5 1374.3,699.5 1372.8,699.3 1413.1,431.6 1420.6,408.8 1225.0,350.6 1035.2,286.6 934.9,257.7 901.9,243.2 800.9,211.8 727.3,195.1 596.0,174.3 509.1,167.7 508.1,75.2 351.8,91.2 184.7,105.2 58.2,117.0 42.5,112.9 16.2,89.2 1.0,103.8 1.0,155.7 81.3,187.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0753/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[925.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60790053166538,39.35375211114171]}},{"type":"Feature","properties":{"resourceCoords":[221.0,1573.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61101341047777,39.34893439199515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0754__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p754 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1243.2"},{"label":"split_canvas_w","value":"5796.0"},{"label":"split_canvas_h","value":"7024.8"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0754__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0754","type":"ImageService3","width":1449,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.9,1662.2 31.5,1834.4 228.5,2014.2 842.2,2034.4 936.7,1987.8 1347.8,1989.0 1392.8,1803.0 1371.0,1414.0 1396.9,715.7 1411.7,716.8 1391.5,655.0 1392.5,648.2 1050.5,598.9 963.2,586.2 854.8,595.8 715.2,549.3 599.2,528.8 555.6,523.5 342.3,457.5 161.4,403.1 154.0,426.0 115.5,693.6 117.0,693.8 101.8,923.6 108.1,924.6 114.5,1337.2 99.6,1334.9 80.2,1471.7 54.9,1662.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0754__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[359.0,1377.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6045528,39.3497488]}},{"type":"Feature","properties":{"resourceCoords":[1329.0,1098.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.600054,39.350829]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0755/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p755","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0755/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0755","type":"ImageService3","width":1449,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1236.7,2000.2 1135.0,1972.0 1101.5,1957.7 999.1,1927.0 924.6,1910.8 791.7,1891.0 703.8,1885.1 701.9,1791.7 544.1,1809.4 375.4,1825.1 247.7,1838.3 231.7,1834.2 205.0,1810.5 188.7,1826.4 189.2,1877.5 106.6,1845.8 104.1,1562.1 135.2,1513.5 249.4,1470.2 245.2,1284.8 113.0,1274.9 98.9,1221.7 89.6,896.3 126.4,742.0 134.0,322.4 99.6,226.3 418.2,163.7 425.2,176.3 716.5,141.9 716.6,131.6 909.3,132.5 941.0,132.4 976.2,136.2 1004.8,145.2 1037.2,168.5 1308.7,250.6 1325.2,502.6 1374.7,688.8 1359.3,1351.7 1353.8,1351.8 1333.1,1569.2 1321.4,1567.5 1273.7,2012.3 1236.7,2000.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0755/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1135.0,1972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6078543,39.353747]}},{"type":"Feature","properties":{"resourceCoords":[598.0,485.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6104553,39.3590173]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p756 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3169.6"},{"label":"split_canvas_w","value":"5784.0"},{"label":"split_canvas_h","value":"5098.4"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"419.6,1983.9 818.8,2016.2 917.3,1966.5 1063.0,1966.6 1375.7,2016.0 1407.3,1949.6 1424.4,1729.6 1412.8,1325.6 1379.2,1040.7 1136.6,1030.5 1114.4,1022.4 1133.5,1004.2 1009.0,1003.8 1004.5,1003.8 786.2,957.9 715.8,974.4 356.1,867.6 143.2,864.6 64.2,866.4 62.4,876.0 113.5,874.4 169.2,877.2 55.6,989.0 115.6,1327.9 134.3,1331.8 59.1,1863.8 400.8,1915.2 399.8,1922.0 419.6,1983.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[397.0,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59982032469266,39.352480791692024]}},{"type":"Feature","properties":{"resourceCoords":[473.0,1405.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5995284325257,39.354306646065865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p756 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.66"},{"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":"5784.0"},{"label":"split_canvas_h","value":"4015.2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"394.4,770.2 572.0,828.9 781.4,900.0 824.4,906.4 939.3,929.8 1075.6,979.4 1182.7,972.9 1269.3,987.8 1355.0,462.4 1336.5,458.1 1284.3,121.2 1399.2,12.9 1344.0,9.0 1293.4,9.6 1276.8,89.0 1114.1,81.2 1015.9,43.1 881.6,62.6 638.8,28.7 525.4,75.1 152.1,57.1 154.6,10.5 152.2,10.5 149.3,10.5 122.5,222.6 111.2,220.6 51.4,654.4 202.0,708.6 394.4,770.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0756__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1005.0,931.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60265922335532,39.35276889717389]}},{"type":"Feature","properties":{"resourceCoords":[1092.0,404.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60236892127064,39.354702410198975]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0757/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p757","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0757/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0757","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"564.8,85.3 564.1,87.9 1002.4,68.5 998.1,83.5 1361.9,133.6 1361.8,139.8 1356.4,602.8 1349.2,871.6 1349.2,1207.4 1356.6,1856.3 1357.4,1924.8 1357.5,1934.8 1074.6,1974.6 1067.5,1962.4 758.7,2030.2 742.1,1987.0 352.1,2003.3 186.4,1974.5 145.6,1901.0 152.4,1757.4 66.7,1492.7 46.8,1135.6 112.5,93.3 392.1,70.1 391.9,41.2 564.8,85.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0757/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[973.0,550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61173226637871,39.3653280452115]}},{"type":"Feature","properties":{"resourceCoords":[714.0,1342.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61297485224833,39.362430284114815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0758/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p758","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0758/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0758","type":"ImageService3","width":1448,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.1,1883.9 79.0,1873.4 68.0,1210.0 66.3,866.7 72.2,591.8 75.4,118.3 75.7,82.6 340.2,84.6 340.2,81.2 416.2,51.9 1352.8,80.2 1403.1,633.2 1376.1,976.1 1394.3,1322.3 1320.8,1921.6 1136.7,1949.7 1039.3,2003.2 670.8,2025.5 672.6,2045.8 400.2,1971.5 367.3,1949.1 338.6,1941.0 303.4,1938.2 280.7,1938.9 271.9,1939.1 80.1,1943.4 79.1,1883.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0758/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[70.0,1582.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60996886941408,39.36158094185937]}},{"type":"Feature","properties":{"resourceCoords":[70.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6099080419137,39.366718946087104]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0759/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p759","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0759/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0759","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.9,515.5 118.0,87.3 447.2,98.0 932.1,52.6 1308.2,144.5 1331.4,177.6 1340.7,405.5 1380.5,505.6 1363.8,1201.7 1392.0,1904.2 1411.3,1904.5 1336.3,1934.8 1336.3,1938.2 1073.6,1940.1 1073.8,1969.3 703.4,1925.9 707.4,1910.6 262.8,1939.3 263.5,1936.7 87.1,1895.4 49.9,515.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0759/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[409.0,1427.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61292114380562,39.36886183998848]}},{"type":"Feature","properties":{"resourceCoords":[1066.0,1022.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60981037936385,39.370264830333994]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p760 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2694.4"},{"label":"split_canvas_h","value":"4466.8"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760","type":"ImageService3","width":1440,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.4,1110.7 183.0,1107.8 316.2,1000.1 372.5,966.3 423.6,946.5 577.1,920.3 579.0,711.0 511.7,452.2 563.2,236.4 533.8,235.5 526.0,219.1 523.9,183.9 526.6,73.2 484.5,72.0 379.1,69.0 355.3,68.2 1.0,104.8 1.0,123.4 30.9,108.3 29.4,179.4 20.7,211.4 1.0,210.2 1.0,228.2 60.3,253.7 126.3,553.5 106.0,729.6 32.8,859.3 36.6,985.8 33.0,988.7 131.4,1110.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[-30.0,891.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5875659210273,39.32740538202371]}},{"type":"Feature","properties":{"resourceCoords":[502.7,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58332129288667,39.32847343996683]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p760 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5760.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760","type":"ImageService3","width":1440,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.0,1996.7 685.4,2011.5 685.4,2009.1 1233.8,2006.1 1233.7,2051.1 1240.0,2051.1 1240.0,2028.7 1291.9,1943.0 1248.2,1595.2 1311.5,1199.7 1370.1,1026.3 1389.8,738.8 1325.0,83.1 1268.1,11.3 1117.7,35.9 1067.7,55.0 1012.4,87.8 881.5,192.3 831.0,194.8 735.5,75.0 651.1,143.3 619.4,493.8 746.2,866.5 667.0,930.5 690.9,984.0 413.0,1228.1 446.2,1269.1 440.1,1327.5 363.4,1495.9 363.4,1496.0 363.4,1496.0 363.2,1496.3 199.5,1497.8 123.2,1535.2 92.8,1593.7 102.7,1779.8 52.1,1903.1 67.0,1939.5 1.0,1977.6 1.0,1978.3 302.1,2012.7 302.0,1996.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0760__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[688.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59310163208411,39.322033464916586]}},{"type":"Feature","properties":{"resourceCoords":[857.0,215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58759333969721,39.32634048138914]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p761 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.07"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5368.0"},{"label":"split_canvas_w","value":"5808.0"},{"label":"split_canvas_h","value":"2900.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761","type":"ImageService3","width":1452,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"493.5,1951.7 1059.4,2050.4 1198.1,2029.1 1235.8,2051.6 1314.3,2051.8 1341.8,2036.5 1354.0,2051.9 1372.8,2052.0 1355.4,2030.0 1393.7,1979.2 1394.9,1912.3 1340.5,1670.3 1353.5,1560.7 1217.2,1556.4 1125.0,1440.0 1036.1,1452.8 930.2,1399.8 798.1,1406.2 679.8,1429.3 497.4,1557.7 377.6,1596.1 274.2,1517.5 167.9,1549.3 104.8,1644.3 83.8,1784.3 108.2,1961.7 158.8,1999.7 339.3,2000.1 378.5,1967.4 493.5,1951.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1342.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57743530325331,39.32704014586026]}},{"type":"Feature","properties":{"resourceCoords":[1452.0,1342.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57209601331877,39.3235770868456]}},{"type":"Feature","properties":{"resourceCoords":[1452.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57431563664993,39.32150022840278]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57965492658447,39.32496328741744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p761 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"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":"5808.0"},{"label":"split_canvas_h","value":"5407.6"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761","type":"ImageService3","width":1452,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"609.6,1346.0 615.0,1346.1 615.2,1345.2 1400.4,1350.9 1429.0,1350.9 1429.0,1349.5 1397.9,1334.7 1421.1,1284.2 1395.2,734.4 1426.1,549.6 1422.4,527.3 1371.0,550.8 1358.9,423.2 1407.6,376.9 1398.2,357.4 1406.8,344.8 1425.5,345.9 1403.8,236.8 1429.0,18.1 1429.0,15.8 812.5,17.2 813.0,47.5 760.2,87.5 725.3,76.5 720.3,34.8 636.5,14.5 333.8,48.7 182.3,14.8 204.2,52.3 141.8,75.0 96.2,60.6 87.3,46.6 115.8,20.6 2.5,25.6 31.4,148.9 48.5,132.3 62.3,142.7 91.9,291.3 48.0,783.4 95.5,880.6 56.2,960.1 84.3,1058.7 34.9,1198.0 40.9,1226.5 402.1,1181.4 426.1,1181.6 574.6,1182.8 574.3,1294.2 577.2,1329.5 585.5,1345.9 609.6,1346.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0761__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[582.0,916.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58247151809367,39.32907293773226]}},{"type":"Feature","properties":{"resourceCoords":[582.0,1000.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58271681531727,39.32885105918013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0762__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p762 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.50"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6218.8"},{"label":"split_canvas_w","value":"2456.0"},{"label":"split_canvas_h","value":"2049.2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0762__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0762","type":"ImageService3","width":1440,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"469.8,2041.1 569.0,1999.3 547.7,1840.2 571.0,1613.7 491.7,1611.2 442.5,1556.1 422.2,1556.3 468.0,1607.8 359.2,1699.4 307.4,1666.0 258.6,1701.5 214.3,1681.5 205.4,1710.3 99.3,1698.0 80.7,1698.0 132.2,1768.8 78.2,1962.5 184.1,1960.6 285.0,2029.9 378.1,2014.4 469.8,2041.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0762__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1554.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57606740334846,39.32264629042029]}},{"type":"Feature","properties":{"resourceCoords":[614.0,1554.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57397803619497,39.321131091462455]}},{"type":"Feature","properties":{"resourceCoords":[614.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5756142969781,39.31978048167609]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57770366413159,39.32129568063392]}},{"type":"Feature","properties":{"resourceCoords":[576.0,1702.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.574581,39.3208339]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0763/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p763","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0763/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0763","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1289.5,1986.9 1104.1,2004.0 1022.3,1979.5 716.3,2027.5 91.5,1976.1 59.9,1860.8 75.7,1766.8 46.6,1732.3 107.7,1624.5 135.6,1315.2 98.4,1121.0 118.2,1019.7 95.0,742.0 145.7,600.2 120.2,480.6 154.5,277.0 94.2,140.7 142.5,124.7 232.0,198.8 463.4,259.1 573.6,226.6 716.1,97.6 754.3,119.0 764.1,109.8 982.0,51.8 983.0,65.5 1042.7,44.9 1128.7,297.9 1108.8,304.9 1239.6,505.1 1143.4,630.8 1166.5,628.5 1239.0,821.3 1423.0,960.1 1372.9,1035.8 1375.2,1659.6 1388.7,1661.4 1357.8,1924.8 1363.1,1925.5 1324.7,2036.3 1289.5,1986.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0763/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1113.0,713.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57401372537164,39.345346927011555]}},{"type":"Feature","properties":{"resourceCoords":[1037.0,1860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57740282274406,39.34213870086777]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0764/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p764","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0764/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0764","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"73.6,1046.4 68.2,1045.8 96.6,780.3 83.1,778.6 74.3,150.7 124.0,74.0 187.4,111.2 222.1,122.8 602.3,182.6 616.4,203.8 961.0,51.1 987.9,57.2 1010.1,75.0 1177.0,126.7 1400.5,118.1 1361.0,136.2 1347.6,142.4 1314.7,282.9 1335.2,426.4 1289.5,510.9 1333.0,833.5 1314.8,949.3 1359.5,1093.9 1332.7,1486.2 1381.8,1688.2 1326.1,1938.4 1210.3,1971.4 1073.5,1949.8 709.4,2000.4 156.1,1951.0 87.6,1735.2 90.8,1304.0 66.7,1200.4 36.1,1158.4 73.6,1046.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0764/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[124.0,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.573505,39.3439733]}},{"type":"Feature","properties":{"resourceCoords":[963.0,438.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5713563,39.3411525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0765/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p765","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0765/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0765","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"852.6,1875.8 865.1,1898.2 1222.2,1772.4 1248.8,1780.7 1302.4,1637.7 1321.2,1627.3 1367.0,1509.6 1384.7,1420.2 1390.4,1323.4 1379.5,1188.3 1363.6,1157.5 1355.5,1064.5 1366.5,1044.5 1350.5,859.4 1360.8,839.1 1351.9,735.1 1338.1,532.7 1336.9,465.8 1346.5,137.1 1320.4,135.9 1319.8,155.9 428.4,112.7 318.3,114.4 147.4,112.8 124.3,112.5 105.3,332.9 91.4,332.7 87.0,568.5 36.7,610.1 65.2,656.5 60.9,743.6 8.0,780.5 1.0,781.8 1.0,795.7 61.6,779.3 130.9,1040.6 110.5,1046.3 228.6,1257.4 122.8,1377.5 146.3,1376.9 206.1,1576.4 382.2,1729.2 442.8,1771.5 476.5,1785.8 852.6,1875.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0765/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[844.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57207406236572,39.342630477640704]}},{"type":"Feature","properties":{"resourceCoords":[1358.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5658218689423,39.34700834214979]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0766/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p766","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0766/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0766","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"313.0,2049.6 312.0,2049.0 238.4,2049.0 74.0,1989.6 52.6,1970.8 101.3,1826.7 119.7,1815.8 161.5,1697.1 176.2,1607.5 178.7,1510.9 163.5,1376.8 146.6,1346.7 135.6,1254.4 145.8,1234.1 124.0,1050.3 133.5,1029.8 121.3,926.6 101.0,725.5 97.6,658.9 96.5,331.3 96.0,197.0 95.6,65.1 669.8,66.0 668.0,29.0 843.0,21.2 846.1,73.4 1351.2,114.0 1393.5,415.3 1348.8,765.5 1376.3,923.6 1351.6,1057.3 1389.3,1244.8 1333.8,1886.8 1303.2,1956.7 675.5,1964.0 462.2,2050.7 349.0,2049.0 343.2,2049.8 313.0,2049.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0766/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56773703944913,39.34453970711906]}},{"type":"Feature","properties":{"resourceCoords":[1236.0,1129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56351305569405,39.34238517835961]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p767 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.85"},{"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":"5764.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767","type":"ImageService3","width":1441,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"13.9,1272.1 13.8,1305.7 185.3,1301.8 187.9,1678.8 192.4,1914.6 360.7,1911.1 468.9,1906.2 1347.1,1922.5 1347.1,1902.8 1372.8,1903.2 1372.8,1770.5 1372.8,1630.9 1372.7,1567.4 1347.7,1567.3 1347.9,1255.9 1371.7,1254.4 1372.3,1103.8 1359.1,1084.5 1359.5,593.9 1359.1,207.8 1168.8,144.2 727.8,72.6 727.3,156.2 780.5,232.7 775.9,552.0 804.1,649.4 774.6,713.3 770.0,1188.7 720.4,1233.7 720.4,1236.3 717.5,1236.3 716.9,1236.8 493.6,1236.2 447.9,1261.7 206.3,1232.9 223.4,1243.5 216.7,1261.6 147.0,1285.2 13.9,1272.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1360.0,1291.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5643607,39.3488902]}},{"type":"Feature","properties":{"resourceCoords":[1360.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5659314,39.3470374]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p767 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.70"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2913.2"},{"label":"split_canvas_h","value":"4945.2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767","type":"ImageService3","width":1441,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"513.9,68.7 488.6,65.9 374.2,107.8 92.1,80.3 106.5,234.3 152.4,306.4 100.8,356.9 90.0,429.9 115.8,629.5 88.4,704.3 106.2,891.4 81.8,1171.4 189.6,1146.8 377.2,1199.2 582.9,1182.9 596.1,1203.6 644.8,1162.0 645.2,930.3 658.9,930.3 673.9,713.5 696.5,713.5 695.1,478.2 697.5,102.0 526.3,103.7 526.8,70.2 513.9,68.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0767__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[477.2,713.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.571399,39.349748]}},{"type":"Feature","properties":{"resourceCoords":[477.2,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5698637,39.351612]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0768/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p768","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0768/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0768","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.2,2014.2 115.2,1948.8 89.5,1949.9 75.5,1629.2 99.9,1626.5 93.6,1471.5 79.1,1452.2 57.0,947.0 38.9,549.5 22.6,79.7 22.5,75.6 1364.2,74.9 1376.2,89.4 1347.8,128.8 1391.3,182.6 1400.6,261.2 1376.7,1902.6 1398.2,2020.3 882.6,2000.4 877.2,1947.4 699.5,1962.8 702.9,2000.4 118.6,2023.7 118.2,2014.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0768/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[57.0,947.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5625736,39.3510018]}},{"type":"Feature","properties":{"resourceCoords":[1326.0,465.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5566182,39.3497682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0769__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p769 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"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":"5756.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0769__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0769","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"737.6,1971.6 737.3,1887.2 1183.2,1955.2 1376.0,2017.6 1376.0,1557.1 1376.0,1536.2 1376.3,563.0 1367.2,560.6 1352.4,9.4 1342.8,9.3 1343.1,17.8 1202.3,71.2 928.9,55.1 750.5,93.0 753.4,996.6 699.5,1213.8 635.5,1212.0 635.2,1212.0 651.4,1223.5 644.8,1240.0 613.0,1253.6 159.1,1245.1 111.2,1268.2 127.1,1420.5 73.3,1651.2 95.8,1948.5 494.5,1989.5 709.4,1931.7 737.6,1971.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0769__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1371.0,1629.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56060084977779,39.35333897503279]}},{"type":"Feature","properties":{"resourceCoords":[1371.0,2010.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56158368512823,39.35220387261376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0770/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p770","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0770/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0770","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.0,93.0 97.8,37.9 470.4,85.4 761.4,35.9 1236.5,91.3 1322.9,74.4 1369.7,145.6 1355.9,380.7 1396.3,1143.1 1375.0,1919.4 1336.5,2002.4 1359.2,2032.3 66.8,1977.3 67.0,1960.7 75.2,1002.8 66.2,1000.3 56.1,457.7 46.6,448.4 41.0,93.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0770/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[730.0,798.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.554723,39.355817]}},{"type":"Feature","properties":{"resourceCoords":[1347.0,647.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5519036,39.3550417]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0771__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p771 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.45"},{"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":"5756.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0771__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0771","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"754.3,1974.2 812.9,1911.5 1002.4,1960.5 1312.5,1985.6 1399.7,1637.4 1381.7,1491.8 1329.1,1387.3 1233.3,1375.9 1228.0,1352.4 1012.6,1351.9 923.5,1392.3 679.5,1407.9 613.9,1388.9 605.2,1372.8 614.0,1364.3 655.7,1352.7 530.5,1351.5 530.0,1351.5 530.0,1336.2 493.1,1331.3 476.3,1231.9 475.2,934.9 530.0,875.8 530.0,875.3 529.0,799.5 586.0,797.3 588.0,721.0 588.4,721.0 767.3,719.0 767.5,721.0 770.0,721.0 770.0,762.2 774.2,830.1 839.7,799.9 1345.1,813.6 1400.1,724.4 1368.3,165.7 1334.6,122.2 1046.2,65.3 1036.9,57.5 299.3,122.0 299.6,132.0 54.4,159.3 98.2,196.2 68.4,356.8 62.4,1109.5 101.9,1187.8 112.0,1336.9 62.0,1706.4 75.1,1857.9 162.1,1981.2 150.4,1992.2 189.4,2017.9 227.2,2029.2 361.1,2030.9 360.9,2018.3 754.3,1974.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0771__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1394.0,1507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5521171,39.3328343]}},{"type":"Feature","properties":{"resourceCoords":[1394.0,1752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5529686,39.3322802]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0772__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p772 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"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":"5768.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0772__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0772","type":"ImageService3","width":1442,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1381.7,21.6 997.5,49.6 997.2,61.9 867.0,55.3 830.8,42.9 793.8,16.4 706.5,92.8 162.4,57.9 79.7,98.8 47.0,634.8 109.3,999.6 170.4,1004.6 204.3,1050.6 189.0,1006.4 217.9,1002.4 265.4,1055.6 781.0,1049.7 855.9,1233.9 839.5,1946.4 1052.7,1978.5 1318.4,1947.4 1336.8,1388.3 1386.8,1049.9 1378.1,531.8 1350.0,496.1 1335.7,306.3 1363.6,114.5 1337.4,65.5 1381.7,21.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0772__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1316.0,729.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5582607020478,39.33195480848035]}},{"type":"Feature","properties":{"resourceCoords":[219.0,163.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.55975043374221,39.33625906386138]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0774__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1915 | sanborn03573_014 p774 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5756.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-17T22:06:00Z","modified":"2026-10-17T22:06:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0774__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0774","type":"ImageService3","width":1439,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"930.3,1045.0 816.5,1045.0 816.5,1044.5 814.5,1044.5 816.5,788.2 816.5,670.3 816.5,628.1 1145.7,667.7 1376.2,613.9 1355.5,140.5 1319.3,52.2 440.9,29.4 168.5,40.1 83.2,84.1 98.8,451.7 47.6,703.4 124.6,1242.9 104.2,1527.5 125.4,1955.8 409.3,2016.0 445.6,2048.8 685.5,2031.0 685.6,2021.3 1406.4,1984.8 1334.8,1919.9 1366.2,1428.0 1347.0,1148.0 1268.5,1061.8 1307.5,1046.7 930.3,1045.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191507:03573_07_1915-0774__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[689.0,1478.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5486176,39.3402146]}},{"type":"Feature","properties":{"resourceCoords":[689.0,1713.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5494291,39.3396461]}}]}}]}