{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1902 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"160"},{"label":"placed","value":"85"},{"label":"unplaced","value":"75"},{"label":"fit sources","value":"georef 62, georef-snap 38, georef-street 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"23 sheet(s) cut into 57 panels"},{"label":"unplaced pages","value":"p382__1 (tier 1, 39.28809,-76.61156 +/-105m); p382__2 (tier 1, 39.28810,-76.60942 +/-251m); p382s__1 (tier 1, 39.28814,-76.61088 +/-106m); p382s__2 (tier 4, 39.28216,-76.59319 +/-2953m); p383 (tier 2, 39.28608,-76.60538 +/-113m); p383s (tier 3, 39.28543,-76.60580 +/-489m); p386__1 (tier 1, 39.28435,-76.60126 +/-217m); p386__2 (tier 1, 39.28460,-76.60262 +/-244m); p408__2 (tier 1, 39.28768,-76.56242 +/-100m); p415 (tier 1, 39.28061,-76.59836 +/-127m); p418__2 (tier 1, 39.28181,-76.59117 +/-100m); p420__1 (tier 1, 39.27811,-76.57950 +/-100m); p420__2 (tier 1, 39.27915,-76.57922 +/-128m); p428__1 (tier 1, 39.28263,-76.57055 +/-118m); p428__3 (tier 1, 39.28049,-76.57493 +/-140m); p433 (tier 1, 39.27507,-76.56953 +/-100m); p435 (tier 1, 39.27249,-76.57040 +/-254m); p436 (tier 1, 39.27409,-76.56773 +/-252m); p438 (tier 2, 39.27029,-76.56982 +/-100m); p439 (tier 3, 39.26556,-76.56829 +/-489m); p440 (tier 1, 39.26169,-76.56971 +/-251m); p441__1 (tier 1, 39.28707,-76.56856 +/-100m); p441__2 (tier 1, 39.28260,-76.58200 +/-226m); p442__1 (tier 3, 39.26617,-76.56551 +/-489m); p442__2 (tier 3, 39.26617,-76.56551 +/-489m); p442__3 (tier 3, 39.26617,-76.56551 +/-489m); p442__4 (tier 3, 39.26617,-76.56551 +/-489m); p447__2 (tier 1, 39.27804,-76.60754 +/-100m); p448__2 (tier 1, 39.27988,-76.60686 +/-100m); p448__3 (tier 1, 39.28067,-76.60753 +/-100m); p452 (tier 1, 39.27642,-76.60429 +/-391m); p459__2 (tier 1, 39.26737,-76.61193 +/-217m); p462 (tier 1, 39.27421,-76.60139 +/-255m); p464 (tier 1, 39.27192,-76.59665 +/-251m); p465 (tier 2, 39.27446,-76.59341 +/-100m); p466__1 (tier 1, 39.27701,-76.56434 +/-100m); p466__2 (tier 1, 39.27702,-76.56411 +/-100m); p466__3 (tier 1, 39.27686,-76.56416 +/-100m); p473 (tier 3, 39.26516,-76.59213 +/-489m); p474__1 (tier 2, 39.27137,-76.58800 +/-100m); p476__1 (tier 1, 39.29155,-76.59324 +/-111m); p476__2 (tier 1, 39.29359,-76.59465 +/-100m); p476__3 (tier 1, 39.28984,-76.59772 +/-118m); p476__4 (tier 1, 39.29191,-76.59288 +/-100m); p476__5 (tier 1, 39.28982,-76.59730 +/-164m); p477__1 (tier 4, 39.28216,-76.59319 +/-2953m); p477__2 (tier 1, 39.22793,-76.58800 +/-187m); p477__3 (tier 4, 39.28216,-76.59319 +/-2953m); p478__1 (tier 4, 39.28216,-76.59319 +/-2953m); p478__2 (tier 4, 39.28216,-76.59319 +/-2953m); p479 (tier 1, 39.29026,-76.59574 +/-254m); p480__1 (tier 2, 39.27119,-76.60342 +/-100m); p480__2 (tier 1, 39.27608,-76.56267 +/-177m); p481__2 (tier 4, 39.28216,-76.59319 +/-2953m); p481__3 (tier 4, 39.28216,-76.59319 +/-2953m); p482__1 (tier 4, 39.28216,-76.59319 +/-2953m); p482__2 (tier 4, 39.28216,-76.59319 +/-2953m); p482__3 (tier 4, 39.28216,-76.59319 +/-2953m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0375/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p375","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0375/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0375","type":"ImageService3","width":1436,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1317.8,225.1 1331.1,556.9 1347.0,1252.6 1350.2,1732.7 1331.8,1836.2 1304.6,1855.8 732.9,1861.2 195.3,1871.1 103.1,1779.7 116.5,151.4 1322.2,168.2 1317.8,225.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0375/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[109.0,211.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6151671686978,39.289518462465836]}},{"type":"Feature","properties":{"resourceCoords":[1011.0,808.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61298401949108,39.288484107012366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0376/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p376","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0376/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0376","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1158.0,196.0 1178.7,193.8 1174.8,226.2 1182.2,1156.3 1190.8,1838.8 294.5,1835.3 287.0,1840.6 306.8,1737.4 310.6,1257.0 304.6,560.8 296.1,228.7 301.3,171.8 1158.0,196.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0376/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[880.0,1189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61081496309792,39.28786825832831]}},{"type":"Feature","properties":{"resourceCoords":[308.0,948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61219446244597,39.28825686541394]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0377/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p377","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0377/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0377","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.3,1166.2 249.1,228.0 253.9,195.6 907.8,142.6 1143.7,189.0 1145.6,848.5 1138.8,848.4 1142.9,1281.2 1155.6,1281.3 1146.9,1538.7 1140.2,1538.7 1124.5,1882.2 1107.8,1879.2 226.5,1854.8 234.3,1166.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0377/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,1330.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6087398056715,39.287735409013045]}},{"type":"Feature","properties":{"resourceCoords":[1148.0,1330.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60794013507858,39.287781026435326]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0378/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p378","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.54"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0378/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0378","type":"ImageService3","width":1436,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"694.5,1932.4 131.3,1851.0 136.8,1514.1 143.3,1514.0 144.3,1261.6 131.9,1261.8 115.4,838.1 122.0,838.0 101.0,192.2 147.3,114.8 315.7,100.3 473.2,165.6 910.1,177.4 1065.3,150.7 1172.8,377.6 1238.0,739.2 1370.6,1072.4 1392.0,1132.7 1370.6,1139.7 1423.8,1616.2 1423.9,1857.0 1339.0,1858.0 1321.5,1889.2 694.5,1932.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0378/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[122.0,838.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6080287,39.2886521]}},{"type":"Feature","properties":{"resourceCoords":[626.0,1866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6067159,39.2867911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0379/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p379","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0379/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0379","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.8,1150.2 11.2,1489.5 9.0,1780.0 1.0,1780.9 1.0,1781.2 9.0,1783.0 9.0,1802.0 1.0,1802.9 1.0,1896.1 35.8,1904.2 168.2,1915.0 305.3,1914.9 915.4,1870.1 1418.3,1833.8 1402.0,1680.9 1366.9,1207.5 1338.5,905.0 1311.8,569.0 1298.3,286.2 1262.3,282.3 1249.6,130.7 1152.4,88.8 727.5,186.2 123.7,87.2 151.7,343.7 93.6,716.7 110.4,1084.9 110.9,1150.7 87.8,1150.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0379/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60424942564747,39.290205113318144]}},{"type":"Feature","properties":{"resourceCoords":[339.0,390.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60512014283218,39.28963587799467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__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 | 1902 | sanborn03573_007 p380 [1]","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":"5732.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"18.3,231.4 17.4,383.1 52.7,390.1 40.8,672.0 37.2,1008.0 38.3,1310.7 30.8,1783.7 33.3,1936.8 384.3,1944.2 942.1,1950.1 975.0,1952.5 1041.7,1950.4 1146.8,1711.9 1172.7,1696.3 1256.0,1508.5 1265.2,1444.5 1368.9,1204.5 1375.7,1156.0 1418.0,1093.8 1423.0,1082.0 1432.0,1062.2 1432.0,902.7 676.1,794.7 719.6,475.8 917.9,500.8 918.1,499.2 371.8,422.8 18.3,231.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[666.0,786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6014364991221,39.29030641113764]}},{"type":"Feature","properties":{"resourceCoords":[1227.0,1536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59947719193539,39.28955210837853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__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 | 1902 | sanborn03573_007 p380 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1558.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4174.0"},{"label":"split_canvas_h","value":"2064.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1252.8,382.7 1270.9,514.9 1282.3,514.9 1315.1,400.5 1408.5,73.6 1363.9,131.4 1352.6,71.9 1248.4,51.9 685.5,51.9 484.4,54.0 484.5,378.0 1252.8,382.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0380__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[484.4,378.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6014063,39.2903006]}},{"type":"Feature","properties":{"resourceCoords":[484.4,54.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6016508,39.2908509]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0381/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p381","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.70"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0381/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0381","type":"ImageService3","width":1422,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"744.0,96.1 1335.8,90.8 1301.3,115.7 1286.3,321.2 1184.0,409.1 1156.2,545.5 1149.7,728.4 1252.9,831.2 1275.2,1488.2 1360.2,1674.3 1297.4,1915.7 1155.1,1960.6 1151.6,1996.5 956.7,1988.5 956.5,1976.7 840.9,1959.9 840.5,1928.4 206.7,1933.9 210.8,1871.1 169.8,1871.7 101.8,1446.3 139.6,173.5 187.4,106.2 744.0,96.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0381/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1351.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61216456862456,39.28652386666325]}},{"type":"Feature","properties":{"resourceCoords":[167.0,1936.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61472170898098,39.28324908980049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0384/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p384","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0384/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0384","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"110.9,194.0 153.9,10.2 160.6,10.9 178.0,13.0 195.1,12.2 216.0,214.7 252.7,219.3 386.7,216.5 524.1,202.2 1131.4,94.3 1380.2,1493.5 1147.3,1439.9 1159.9,1496.5 1122.6,1660.3 1048.8,2010.7 971.9,1993.4 845.1,1904.2 808.1,1847.9 832.5,1960.9 597.3,1896.5 601.1,1881.8 288.8,1857.5 81.8,1477.6 166.6,1148.6 74.6,667.9 151.8,227.0 19.0,205.3 19.0,185.0 25.0,179.0 25.0,174.9 110.9,194.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0384/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1045.0,896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60229381970746,39.28611750544923]}},{"type":"Feature","properties":{"resourceCoords":[1262.0,862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6018327801165,39.286281131559036]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0385/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p385","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0385/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0385","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.5,492.9 510.4,339.6 843.1,233.4 1370.2,59.4 1395.1,52.9 1358.0,774.5 1398.2,777.6 1382.3,983.1 1391.8,1076.8 1369.1,1346.1 1338.5,1343.8 1317.8,1583.5 1329.8,1611.2 1309.7,1895.5 780.0,1850.0 464.8,1822.5 34.5,492.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0385/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[165.0,1630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60193401688151,39.28552385302449]}},{"type":"Feature","properties":{"resourceCoords":[530.0,325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60150490146812,39.28796421310591]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0387/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p387","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"25"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0387/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0387","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"222.6,1565.6 240.0,1540.8 240.4,1334.9 222.8,1272.5 220.9,1010.5 207.5,963.3 221.1,889.1 221.1,876.8 220.9,876.3 221.1,708.1 220.6,369.7 221.6,333.9 343.7,287.8 917.0,347.1 1269.0,331.3 1268.9,1060.3 1265.2,1666.8 1071.5,1671.0 1072.0,1666.1 558.9,1664.3 222.7,1826.8 222.6,1565.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0387/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1269.0,815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5971129,39.2906522]}},{"type":"Feature","properties":{"resourceCoords":[1269.0,1024.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5970879,39.2902756]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0388/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p388","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0388/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0388","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"999.7,307.1 1419.1,427.2 1422.3,1667.2 1408.8,1667.0 1021.7,1671.3 44.9,1671.5 46.4,1073.0 44.1,353.5 999.7,307.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0388/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[343.0,1042.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59638760277481,39.290292661641026]}},{"type":"Feature","properties":{"resourceCoords":[1372.0,396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59403257209739,39.29156224015958]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0389/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p389","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0389/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0389","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"13.3,1636.0 15.0,975.0 24.0,974.0 24.0,941.0 16.0,940.0 15.0,932.0 16.0,910.0 20.0,909.0 16.0,840.0 23.0,837.0 23.0,818.0 19.0,817.0 22.0,738.0 18.0,737.0 16.3,419.3 42.8,427.2 98.7,349.9 578.7,290.4 1155.3,332.0 1419.0,408.0 1416.6,1031.3 1407.9,1647.1 1136.0,1643.8 857.3,1643.4 24.2,1636.3 13.3,1636.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0389/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,1024.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59170182852432,39.29046771533243]}},{"type":"Feature","properties":{"resourceCoords":[62.0,384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59369644858339,39.29155779436457]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0390/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p390","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0390/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0390","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.4,391.6 477.3,292.3 880.4,297.7 1337.5,417.8 1355.1,392.9 1352.8,1650.2 605.1,1649.8 51.2,1648.0 54.5,1020.1 51.2,384.6 76.4,391.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0390/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[327.0,1020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5897489,39.2905397]}},{"type":"Feature","properties":{"resourceCoords":[1354.0,1020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5873528,39.2906331]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0391/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p391","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0391/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0391","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.6,343.8 1237.0,325.4 1321.4,441.2 1348.5,995.2 1275.4,1650.6 380.4,1656.3 126.3,1655.9 122.2,398.5 160.6,343.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0391/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[810.0,385.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5858205,39.2918461]}},{"type":"Feature","properties":{"resourceCoords":[638.0,1654.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5860876,39.2895404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0392/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p392","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0392/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0392","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"155.8,202.7 214.8,174.4 543.2,15.7 1044.4,17.2 1044.0,22.0 1129.0,22.0 1129.3,20.1 1132.5,20.1 1133.0,21.0 1233.2,19.7 1238.7,473.8 1235.6,626.9 1237.0,945.0 1236.4,1465.3 1238.2,2014.2 1041.7,2016.0 913.6,2016.1 596.4,2016.2 222.1,2018.7 217.6,1738.2 203.4,1712.2 203.4,1475.4 233.6,1475.1 233.0,1209.1 215.8,1118.0 213.9,915.2 174.2,915.6 149.3,205.0 155.8,202.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0392/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[921.0,1456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59758866245474,39.286434844298746]}},{"type":"Feature","properties":{"resourceCoords":[598.0,21.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5985333873094,39.28905133425748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0393/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p393","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0393/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0393","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"51.2,1461.6 56.7,947.8 58.4,633.5 62.9,482.3 61.8,32.0 1016.8,44.0 1395.3,44.7 1411.1,45.1 1420.9,2010.9 1365.0,2010.7 997.6,2009.2 47.8,2003.8 51.2,1461.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0393/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[634.0,1462.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5954304,39.2865129]}},{"type":"Feature","properties":{"resourceCoords":[1005.0,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5947436,39.2892015]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0394/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p394","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0394/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0394","type":"ImageService3","width":1440,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"14.0,2026.5 14.0,2003.0 12.7,2002.7 12.6,1999.1 14.0,1999.0 14.0,1929.0 11.8,1928.5 11.8,1925.2 14.0,1925.0 14.0,1779.0 10.2,1778.5 10.1,1776.3 14.0,1776.0 15.0,974.0 24.0,973.0 24.0,942.0 15.0,941.0 16.0,909.0 23.0,903.0 20.0,874.0 15.0,871.0 22.0,802.0 16.0,741.0 13.0,184.0 18.0,180.0 18.0,63.0 11.0,58.0 11.0,54.6 33.0,55.0 857.2,53.9 1133.0,51.6 1402.0,52.2 1402.8,948.9 1401.5,1464.5 1403.5,1718.2 1401.4,2020.5 857.8,2022.2 30.8,2026.4 14.0,2026.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0394/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[854.0,938.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5915306092654,39.28768198405231]}},{"type":"Feature","properties":{"resourceCoords":[1384.0,938.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59025640263359,39.287730746359195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0395/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p395","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0395/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0395","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.0,1728.8 72.4,1471.5 74.9,948.1 76.0,38.0 621.6,40.4 1358.1,41.7 1352.2,2034.7 1015.6,2035.0 71.2,2035.8 74.0,1728.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0395/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1021.0,924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58797206118018,39.28784581966184]}},{"type":"Feature","properties":{"resourceCoords":[333.0,1472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58953461199829,39.28677619547081]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0396/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p396","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0396/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0396","type":"ImageService3","width":1435,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.2,21.9 383.1,24.0 1260.0,24.6 1257.6,45.2 1320.6,99.8 1366.6,1317.5 1303.0,1973.1 1420.8,1973.8 1420.9,2000.9 1322.5,2000.5 1274.5,2000.1 664.6,2003.2 126.5,2004.6 134.2,21.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0396/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[640.0,1448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5858991632479,39.28691622747782]}},{"type":"Feature","properties":{"resourceCoords":[640.0,40.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.58607486276503,39.2895105541589]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0397/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p397","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0397/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0397","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1293.4,1869.7 725.6,1953.5 109.0,1864.1 80.2,759.0 73.5,751.3 377.4,709.7 376.9,724.6 615.3,737.4 568.5,634.4 615.6,680.5 755.4,739.6 832.6,740.2 830.5,389.5 832.2,225.1 808.4,173.5 1042.5,176.4 1357.5,179.8 1387.6,284.6 1384.1,1294.9 1384.0,1756.0 1350.8,1755.3 1353.8,1871.4 1293.4,1869.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0397/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1384.0,1756.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6001442,39.2824123]}},{"type":"Feature","properties":{"resourceCoords":[1384.0,180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6003703,39.2852834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0398/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p398","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0398/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0398","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.7,1771.2 110.2,1771.8 108.0,1306.6 106.4,287.2 75.5,181.6 609.7,183.8 992.0,183.0 1315.9,184.4 1322.6,184.4 1322.2,751.5 1315.4,751.5 1320.2,1275.0 1308.9,1349.7 1306.8,1857.4 965.0,1856.1 964.4,1927.8 922.0,1907.5 80.3,1888.4 76.7,1771.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0398/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[992.0,1856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5980756,39.2823493]}},{"type":"Feature","properties":{"resourceCoords":[992.0,183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5982939,39.2853709]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0399/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p399","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0399/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0399","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"44.4,1370.7 55.8,1295.7 51.4,769.7 58.2,769.7 59.0,200.0 183.6,200.7 385.3,199.8 1371.7,201.4 1367.5,767.8 1367.0,1873.0 994.5,1873.3 315.5,1874.2 41.9,1880.8 44.4,1370.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0399/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[51.0,1333.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5973918,39.2833642]}},{"type":"Feature","properties":{"resourceCoords":[1367.0,1873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5942645,39.2825275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0400/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p400","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0400/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0400","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"444.8,178.5 534.0,178.9 1389.8,184.5 1386.0,793.8 1378.9,1316.5 1375.5,1860.7 901.9,1856.1 392.9,1853.0 51.0,1848.7 56.5,743.4 63.2,176.9 444.8,178.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0400/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[913.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59233935625002,39.28358472974758]}},{"type":"Feature","properties":{"resourceCoords":[913.0,182.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59249984239689,39.2856170109711]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0401/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p401","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0401/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0401","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"763.9,1746.7 156.3,1753.0 151.8,1192.1 144.1,231.8 435.7,233.3 567.4,231.1 1272.5,227.3 1285.1,1745.1 763.9,1746.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0401/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[154.0,1465.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5907216,39.2856921]}},{"type":"Feature","properties":{"resourceCoords":[1276.0,632.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5886645,39.2837352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0402/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p402","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0402/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0402","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"237.0,216.4 237.0,208.6 1232.8,154.3 1187.3,1177.6 1178.5,1178.8 1181.4,1639.9 1189.3,1728.9 1126.2,1739.2 778.1,1736.7 236.2,1737.6 237.0,222.0 237.0,216.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0402/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[772.0,1178.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5898855,39.2827161]}},{"type":"Feature","properties":{"resourceCoords":[237.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5877219,39.2837738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0403/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p403","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0403/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0403","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.8,805.4 1225.2,1022.7 1186.2,1068.5 1160.8,1125.0 1217.8,1103.5 1218.6,1267.2 1211.0,1774.4 1209.7,1942.5 1209.6,1948.1 502.0,1940.5 369.9,1940.5 77.2,1934.3 80.0,1591.0 83.1,1039.1 85.0,413.6 653.4,416.1 1076.8,421.8 1173.1,425.0 1123.2,483.7 1135.6,522.6 1419.8,770.5 1419.8,805.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0403/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[383.0,720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5849888,39.2853917]}},{"type":"Feature","properties":{"resourceCoords":[80.0,1591.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5870521,39.2858411]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0404/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p404","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0404/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0404","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1109.6,1867.4 110.0,1921.6 110.1,1761.5 114.2,1254.9 112.3,1091.3 55.5,1113.2 80.5,1056.6 119.2,1010.6 312.0,792.2 311.7,757.3 26.2,511.8 13.6,472.9 62.9,414.0 418.6,15.9 451.3,44.5 788.4,339.1 872.0,242.8 1174.3,425.0 1174.8,414.0 1348.9,489.5 1327.5,493.4 1336.5,883.9 1262.0,1014.9 1195.8,1551.3 1104.0,1583.9 1090.8,1830.7 1111.0,1835.6 1109.6,1867.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0404/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[166.0,297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5839087,39.2838309]}},{"type":"Feature","properties":{"resourceCoords":[110.0,1935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5877219,39.2837738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0405/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p405","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0405/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0405","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"110.5,1156.2 112.3,736.9 109.8,174.1 158.5,174.4 258.4,174.6 258.3,147.2 272.8,147.3 948.7,151.1 1317.1,214.6 1324.9,213.6 1324.0,739.4 1320.6,1290.7 1322.8,1464.3 1321.5,1862.7 775.6,1861.5 684.0,1772.0 503.6,1603.3 108.2,1251.5 110.5,1156.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0405/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[409.0,175.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5836181,39.2859864]}},{"type":"Feature","properties":{"resourceCoords":[1022.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5819775,39.2829825]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0406/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p406","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0406/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0406","type":"ImageService3","width":1437,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"662.6,134.3 1172.5,222.7 1245.3,186.3 1315.7,186.9 1304.7,1876.5 87.6,1867.7 90.8,1468.0 89.4,1293.8 95.5,740.6 98.9,213.0 662.6,134.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0406/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[704.0,182.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.580057,39.2861196]}},{"type":"Feature","properties":{"resourceCoords":[397.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5805521,39.2830366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0407/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p407","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0407/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0407","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"107.0,176.7 36.1,176.7 124.8,131.5 677.4,60.6 1321.5,144.1 1328.3,177.1 1357.0,1861.5 1415.5,1861.1 1415.5,1870.5 1415.5,1880.3 1325.5,1880.3 108.8,1880.9 107.0,176.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0407/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[108.0,1302.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5784984,39.2841552]}},{"type":"Feature","properties":{"resourceCoords":[1020.0,177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5765124,39.2862521]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0408__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 | 1902 | sanborn03573_007 p408 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"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":"5720.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0408__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0408","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.3,1946.4 666.5,2002.3 1268.3,1904.1 1364.6,1342.2 1273.1,1057.9 1315.1,523.5 833.8,476.6 574.1,531.5 560.0,455.5 545.0,455.5 543.9,368.4 484.9,51.0 129.4,83.7 130.6,527.8 140.1,570.4 140.3,1946.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0408__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[546.0,1124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5624845,39.2878261]}},{"type":"Feature","properties":{"resourceCoords":[546.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5625485,39.2888114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0409/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p409","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0409/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0409","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.9,281.7 151.7,120.5 707.0,36.7 1371.6,70.0 1371.2,631.2 1366.2,1076.8 1368.9,1352.2 1369.1,1925.3 97.8,1925.1 91.1,1757.8 86.1,1757.8 98.9,281.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0409/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1041.0,1354.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5706145,39.2844531]}},{"type":"Feature","properties":{"resourceCoords":[396.0,234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5722553,39.286423]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0410/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p410","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0410/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0410","type":"ImageService3","width":1430,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.6,1343.0 102.6,1067.9 108.8,623.0 110.8,62.5 325.2,73.8 502.5,227.8 1163.2,229.9 1293.0,792.7 1316.1,792.8 1315.8,987.6 1335.1,1007.7 1329.7,1917.8 103.2,1915.3 104.6,1343.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0410/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5702589,39.2869113]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5669088,39.2870485]}},{"type":"Feature","properties":{"resourceCoords":[1430.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56665249999999,39.283300499999996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5700026,39.2831633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0411/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p411","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0411/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0411","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"63.6,1116.2 119.8,400.9 81.9,231.2 131.4,135.8 594.9,123.6 1332.1,123.8 1331.0,698.0 1371.3,697.6 1374.0,963.3 1370.8,979.7 1374.2,1268.0 1371.5,1560.0 1375.2,1811.9 1314.2,1808.3 1278.8,1913.6 1071.3,1942.1 1071.3,2046.4 1051.4,2046.5 1050.4,1846.4 1026.6,1846.5 889.7,1269.4 211.3,1271.5 28.2,1114.5 63.6,1116.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0411/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[224.0,697.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5690855,39.2875623]}},{"type":"Feature","properties":{"resourceCoords":[1331.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.566559,39.2876516]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0412/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p412","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0412/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0412","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1389.3,154.1 1388.6,1518.8 1374.2,1802.1 1272.8,1879.4 77.5,1804.2 75.0,1557.0 79.0,1270.5 76.9,987.6 80.0,971.6 78.6,710.9 39.0,711.1 42.6,147.7 1389.3,154.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0412/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[51.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56653146205372,39.28765823019745]}},{"type":"Feature","properties":{"resourceCoords":[559.0,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.56541594341157,39.28870374915989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0413/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p413","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0413/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0413","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.5,1821.6 65.9,456.9 147.0,341.2 151.4,116.5 222.7,45.3 1240.2,84.2 1384.8,132.0 1380.2,343.3 1366.2,421.8 1364.5,1017.1 1361.1,1234.1 1364.4,1462.5 1360.2,1686.3 1361.0,1915.0 637.5,1910.1 182.5,1919.2 68.5,1821.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0413/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[273.0,1012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.569258,39.2901868]}},{"type":"Feature","properties":{"resourceCoords":[1361.0,1915.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5666175,39.2886659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0414/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p414","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0414/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0414","type":"ImageService3","width":1433,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.7,1681.7 45.6,1458.5 42.9,1230.5 47.0,1014.0 50.4,420.1 64.7,341.8 69.9,131.0 87.2,136.8 458.5,52.9 1339.8,79.7 1387.3,299.4 1360.7,1442.6 1377.0,1441.2 1375.7,1880.8 1384.8,1923.0 40.9,1909.9 40.7,1681.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0414/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[560.0,1459.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5654669,39.2895312]}},{"type":"Feature","properties":{"resourceCoords":[994.0,385.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5645959,39.2915114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0416/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p416","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0416/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0416","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"11.5,1807.5 11.3,1761.4 45.1,1644.9 105.7,1633.2 247.8,1101.1 268.7,727.2 162.8,608.8 136.2,412.3 18.0,356.1 18.7,284.1 361.9,285.4 635.4,278.5 1314.2,277.0 1313.0,1091.5 1317.7,1154.6 1187.8,1287.2 1187.2,1343.6 1101.7,1377.3 995.9,1490.6 943.1,1538.3 886.9,1562.2 856.1,1632.6 728.0,1761.0 652.6,1761.8 603.6,1722.4 593.5,1683.9 623.6,1566.0 11.5,1807.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0416/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1009.0,857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59576348363903,39.281415329942874]}},{"type":"Feature","properties":{"resourceCoords":[382.0,268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.59729643560428,39.282411843062626]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0417/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p417","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.47"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0417/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0417","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"290.5,1612.0 332.9,1628.2 330.0,977.9 427.9,1047.9 466.9,1052.4 520.8,1021.3 547.2,951.6 474.8,787.5 421.0,734.0 419.2,673.6 394.1,607.8 327.8,469.8 326.8,253.9 789.8,66.2 963.9,99.4 1074.2,214.6 1316.0,934.5 1306.2,1206.6 942.1,1846.2 667.0,1932.5 476.4,1886.5 430.5,1719.2 322.2,1636.2 290.5,1612.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0417/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[421.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5959561,39.2801348]}},{"type":"Feature","properties":{"resourceCoords":[200.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5950079,39.280911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0418__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 | 1902 | sanborn03573_007 p418 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"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":"5728.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0418__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0418","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1306.3,364.0 1104.3,364.0 1081.4,364.0 1009.1,305.6 996.4,295.3 551.9,199.4 486.2,254.8 423.4,265.7 76.0,266.0 79.0,736.6 84.2,1242.3 85.3,1582.1 90.0,1952.2 899.6,1944.6 962.3,1939.3 1073.5,2046.0 1074.0,2046.0 1143.0,2046.0 1104.2,1950.5 1411.4,1654.5 1411.5,1624.8 1411.5,1612.5 1362.6,1622.2 1375.8,832.8 1306.3,364.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0418__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[333.0,1950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5950989,39.2820492]}},{"type":"Feature","properties":{"resourceCoords":[76.0,266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5911879,39.2826514]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0419/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p419","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.65"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0419/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0419","type":"ImageService3","width":1438,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"55.5,1749.0 62.0,1268.0 71.1,1267.0 141.7,167.3 327.5,215.9 587.3,78.8 892.3,69.8 1267.0,284.4 1405.9,840.9 1410.9,1200.3 1309.8,1731.4 1120.5,1865.9 906.9,1905.0 915.9,1980.0 680.8,1973.4 594.0,1899.2 132.2,1786.0 62.0,1842.0 55.5,1749.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0419/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[62.0,1268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.589837,39.281982]}},{"type":"Feature","properties":{"resourceCoords":[62.0,1842.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5911187,39.2819097]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0421/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p421","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0421/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0421","type":"ImageService3","width":1427,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.9,926.4 155.3,1351.3 271.4,1453.5 308.4,1657.7 402.9,1736.5 1297.8,1953.8 1349.0,1334.0 1335.1,1322.0 1369.2,797.8 1362.7,240.0 811.0,245.5 717.4,156.2 547.3,1.0 544.3,1.0 504.9,21.1 214.6,362.8 312.2,445.2 134.1,750.6 145.1,751.0 71.9,926.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0421/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1060.0,243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5819775,39.2829825]}},{"type":"Feature","properties":{"resourceCoords":[233.0,341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5838883,39.282748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0422/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p422","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0422/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0422","type":"ImageService3","width":1427,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.4,1347.0 111.6,1334.7 157.6,807.4 163.3,245.4 1398.0,260.6 1377.8,1972.8 1378.8,2008.3 1359.7,2045.2 1272.1,2045.7 1165.8,2046.2 1169.7,1983.3 468.1,1940.2 124.5,1987.3 60.0,1970.2 125.4,1347.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0422/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[778.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5798594,39.283063]}},{"type":"Feature","properties":{"resourceCoords":[-432.0,811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5825655,39.2819366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0423/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p423","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0423/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0423","type":"ImageService3","width":1427,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1328.9,182.3 1325.5,737.2 1320.9,1933.4 716.6,1932.8 191.2,1932.7 140.4,1915.6 120.8,1892.3 119.6,1857.5 127.3,176.3 1328.9,182.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0423/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1024.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5762576,39.2821931]}},{"type":"Feature","properties":{"resourceCoords":[120.0,1767.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5782464,39.2802291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0424/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p424","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0424/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0424","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.1,179.1 213.2,160.0 1335.2,156.0 1336.9,16.2 1341.9,16.2 1348.0,184.0 1346.9,741.8 1342.2,1131.5 1343.0,1856.7 1343.0,1943.0 1072.4,1946.6 776.5,1945.1 117.0,1938.2 120.8,736.2 123.8,178.7 213.1,179.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0424/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[731.0,739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5741255,39.2822708]}},{"type":"Feature","properties":{"resourceCoords":[422.0,180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5749164,39.2832508]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0425/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p425","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0425/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0425","type":"ImageService3","width":1434,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1358.6,167.9 1359.8,1856.7 694.0,1854.0 78.4,1851.4 74.7,1122.0 77.7,729.9 76.5,168.8 1358.6,167.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0425/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[384.0,730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.571977,39.2823522]}},{"type":"Feature","properties":{"resourceCoords":[694.0,1854.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.571129,39.2803606]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0426/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p426","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0426/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0426","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.0,176.0 1339.2,174.9 1334.1,1841.7 1366.2,1842.8 1318.1,1860.8 518.8,1857.0 108.0,1855.0 108.0,176.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0426/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[108.0,1298.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5696487,39.281421]}},{"type":"Feature","properties":{"resourceCoords":[108.0,176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5697797,39.2834482]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0427/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p427","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.62"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0427/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0427","type":"ImageService3","width":1432,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"373.6,203.7 380.6,163.3 406.3,179.7 460.1,181.2 964.0,25.8 1172.7,711.8 1178.6,768.5 1169.8,823.8 1288.7,830.1 1366.1,1584.2 1331.0,1594.5 1257.0,1973.8 792.8,2020.8 433.3,1964.8 240.1,1867.3 113.6,1637.9 173.2,1354.3 442.3,803.4 407.9,574.0 232.7,425.9 191.8,262.2 373.6,203.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0427/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5789999,39.2804558]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5757491,39.2798265]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5769226,39.2761943]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5801734,39.2768236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0428__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 | 1902 | sanborn03573_007 p428 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2670.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3117.6"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0428__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0428","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1298.5,1976.2 1407.9,1104.1 1367.3,1092.3 1360.8,527.5 1347.6,31.4 732.2,48.6 750.3,777.0 740.8,834.0 717.1,885.8 831.8,924.3 703.1,1683.5 847.6,1681.2 966.3,1775.0 963.6,1880.9 1152.4,1893.2 1165.2,1984.4 1298.5,1976.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0428__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1049.3,526.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57606766050982,39.27915027164323]}},{"type":"Feature","properties":{"resourceCoords":[1049.3,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57609564126008,39.280009279693026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0429/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p429","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0429/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0429","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1225.7,1943.7 668.1,1938.9 178.3,1942.0 179.8,1281.4 179.0,984.9 173.1,714.0 86.8,714.6 86.9,101.7 1272.5,97.8 1302.7,97.7 1331.0,709.5 1360.6,709.5 1372.0,1305.7 1363.1,1332.2 1419.7,1355.1 1238.7,1902.1 1225.7,1943.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0429/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[179.0,1638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5747003,39.2800687]}},{"type":"Feature","properties":{"resourceCoords":[662.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5710643,39.2793232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0430/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p430","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0430/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0430","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"109.3,99.1 138.1,707.6 167.5,707.7 179.4,1300.7 170.6,1327.1 226.9,1349.8 47.4,1894.0 46.8,1895.8 900.8,2019.7 899.0,1979.4 1311.5,1901.0 1399.0,1272.8 1298.3,859.3 1308.7,123.5 1177.8,58.1 707.5,96.7 714.4,9.0 703.0,10.0 702.7,6.7 696.5,5.5 696.0,11.0 673.0,11.0 669.3,1.0 668.7,1.0 636.0,114.6 538.1,96.3 109.3,99.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0430/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[262.0,1324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57384553617062,39.27779178581763]}},{"type":"Feature","properties":{"resourceCoords":[645.0,106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57095148142677,39.277195238391634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0431/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p431","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0431/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0431","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.2,1213.7 192.3,44.7 846.0,57.0 1251.7,64.7 1224.8,1877.0 1420.0,1881.8 1419.7,1940.4 1226.2,1936.0 870.2,1914.5 817.0,1909.0 817.4,1900.5 251.4,1845.0 261.2,1800.2 148.2,1765.2 168.3,1668.6 174.2,1213.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0431/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[511.0,616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.57029,39.2793538]}},{"type":"Feature","properties":{"resourceCoords":[846.0,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5695836,39.2804147]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0432/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p432","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.58"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0432/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0432","type":"ImageService3","width":1447,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1018.6,1973.2 912.5,1971.7 504.6,1974.8 506.2,1916.3 454.3,1916.0 99.8,1913.2 94.0,51.0 910.9,52.4 960.0,33.8 1338.7,44.5 1389.5,99.8 1336.8,248.9 1399.0,1373.0 1363.0,1984.9 1018.8,2034.2 1018.6,1973.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0432/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.568844713606,39.280531314528815]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56553931777877,39.28065101180931]}},{"type":"Feature","properties":{"resourceCoords":[1447.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56531997584649,39.276970315515484]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56862537167372,39.27685061823499]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0434/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p434","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0434/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0434","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"152.7,194.1 517.2,212.2 715.1,214.7 714.8,155.2 865.6,157.4 917.0,158.2 915.0,216.0 1318.3,215.8 1423.2,217.9 1423.0,278.3 1368.3,285.8 1390.8,1133.7 1339.8,1805.4 1251.4,1905.6 94.5,1806.2 82.6,1041.2 145.4,572.5 90.0,479.6 98.2,189.0 152.7,194.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0434/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5696219808745,39.277357224286575]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56628510934347,39.27749644448526]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56602964955063,39.27377540362188]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56936652108166,39.2736361834232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0437/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p437","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.71"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0437/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0437","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1359.4,292.1 1404.6,1035.2 1286.1,1910.6 601.0,1945.0 145.3,1865.7 154.8,1327.8 93.0,1241.9 80.6,949.5 80.6,321.3 143.4,138.0 697.5,58.6 1262.5,174.2 1359.4,292.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0437/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56760641611103,39.2729062582468]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56740748507819,39.27028095619461]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.57222430333826,39.27005910242417]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2067.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5724232343711,39.27268440447636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0443/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p443","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0443/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0443","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"312.7,42.2 97.7,129.3 68.0,270.8 238.1,783.5 198.0,1586.8 270.0,1941.9 1088.8,1939.3 1081.3,1628.3 1096.1,1593.5 1085.2,1439.1 1122.1,1484.5 1272.6,136.8 1080.6,126.2 1080.6,114.5 966.8,96.4 966.9,65.3 342.1,61.8 346.9,1.0 306.8,1.0 312.7,42.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0443/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1090.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61282758641929,39.28221241407513]}},{"type":"Feature","properties":{"resourceCoords":[1090.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61289962315861,39.28332910896093]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0444/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p444","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.59"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0444/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0444","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.0,1625.4 102.2,1590.0 91.4,1432.2 129.0,1478.8 289.8,66.9 433.7,24.1 425.1,54.9 793.1,220.1 1294.5,184.7 1371.7,473.1 1375.5,1700.9 1353.8,1714.1 1354.2,1888.5 1330.0,1943.0 94.0,1943.0 87.0,1625.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0444/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1330.0,1943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6098821,39.2800699]}},{"type":"Feature","properties":{"resourceCoords":[94.0,1943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6126849,39.2799569]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0445/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p445","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0445/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0445","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"372.6,1812.2 325.2,697.6 366.4,235.2 1178.0,239.0 1179.2,535.2 1174.1,1191.7 1176.6,1252.7 1228.2,1857.5 360.9,1926.8 361.4,1846.6 372.6,1812.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0445/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[367.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6144461,39.2780986]}},{"type":"Feature","properties":{"resourceCoords":[1178.0,239.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6126849,39.2799569]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0446/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p446","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0446/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0446","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1298.7,234.7 1321.6,181.7 1319.6,13.0 1340.7,13.0 1350.9,834.3 1304.8,834.2 1285.3,834.3 1353.0,1523.8 1345.9,1524.4 1334.6,1757.1 1240.4,1765.4 552.3,1825.7 213.7,1854.9 177.6,1858.0 117.0,1256.1 113.6,1195.4 108.7,541.1 103.0,245.9 1298.7,234.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0446/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[732.0,834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6111511,39.2789381]}},{"type":"Feature","properties":{"resourceCoords":[732.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6112105,39.2800163]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0447__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 | 1902 | sanborn03573_007 p447 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4080.0"},{"label":"split_canvas_w","value":"5780.0"},{"label":"split_canvas_h","value":"4188.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0447__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0447","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.5,1752.7 170.3,1753.0 149.7,1985.5 243.7,1980.9 418.5,1972.5 1284.2,1929.8 1298.7,1622.5 1323.5,1020.0 1321.7,1020.0 1319.0,1020.0 1316.6,1050.0 969.3,1096.0 793.4,1089.5 202.8,1062.0 156.8,1060.2 137.2,1059.4 177.5,1752.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0447__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[831.0,1365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60817547106338,39.27853197467563]}},{"type":"Feature","properties":{"resourceCoords":[1305.0,1645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60701528825969,39.27809689994706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0448__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 | 1902 | sanborn03573_007 p448 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.03"},{"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":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0448__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0448","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.0,1981.0 343.5,1966.7 510.9,1967.0 514.5,2003.3 536.2,1999.8 996.2,1925.8 1353.1,1951.3 1391.8,1582.1 1356.7,1133.6 1335.0,1024.2 1236.8,1020.3 1236.6,1020.3 1236.0,1020.3 1236.0,1020.3 1205.5,891.9 1324.4,602.2 1153.0,570.5 1130.8,542.8 1125.6,542.6 1078.2,477.2 810.4,143.1 677.8,100.0 262.1,110.8 98.7,213.6 53.6,403.6 80.1,915.7 177.0,1066.1 175.6,1106.8 179.0,1717.0 179.0,1981.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0448__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[179.0,1717.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6070344,39.2781366]}},{"type":"Feature","properties":{"resourceCoords":[179.0,1981.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6070088,39.2775792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0449/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p449","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"29"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0449/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0449","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"147.4,133.1 1015.2,133.6 1051.5,133.8 1372.5,136.8 1357.3,480.6 1348.2,480.6 1342.0,710.0 1355.8,710.2 1339.3,1427.2 1360.9,1434.7 1365.5,1434.7 1370.2,1708.2 1129.3,1699.8 963.4,1692.9 687.3,1669.0 54.1,1621.8 62.0,1595.6 112.1,154.9 154.4,53.5 147.4,133.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0449/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1344.0,1222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6112335,39.275161]}},{"type":"Feature","properties":{"resourceCoords":[78.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6142748,39.2754022]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0450/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p450","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0450/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0450","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.2,1439.3 178.5,720.0 164.7,720.0 169.2,489.8 178.4,489.8 191.2,144.8 210.3,144.8 903.5,145.5 1092.7,145.4 1267.8,145.4 1239.6,1878.7 878.0,1877.5 521.8,1876.4 524.2,1725.4 346.1,1724.9 200.2,1720.9 193.4,1446.7 188.8,1446.7 167.2,1439.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0450/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[538.0,1437.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61031905543278,39.274882482129286]}},{"type":"Feature","properties":{"resourceCoords":[538.0,146.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.61071306917869,39.27719952789057]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0451/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p451","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0451/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0451","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1030.5,136.0 1224.0,138.7 1419.2,158.7 1419.3,188.2 1419.3,201.4 1373.2,204.1 1312.4,1865.7 1341.6,1873.7 832.5,1871.7 490.3,1876.5 121.5,1873.4 158.5,132.3 1030.5,136.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0451/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[132.0,1261.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60872639922196,39.27535144121055]}},{"type":"Feature","properties":{"resourceCoords":[132.0,718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60889753718025,39.27632088903246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0453/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p453","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0453/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0453","type":"ImageService3","width":1445,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.3,635.6 254.5,322.2 892.0,312.2 1170.3,311.3 1193.8,647.9 1203.5,846.0 1227.3,1149.6 1265.6,1731.2 228.1,1733.1 191.3,635.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0453/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[893.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6125509,39.2731985]}},{"type":"Feature","properties":{"resourceCoords":[216.0,1149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6140983,39.2726232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0454/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p454","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0454/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0454","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.4,1141.3 197.0,840.0 189.6,643.5 169.9,309.5 335.1,303.3 719.7,286.1 896.2,273.9 904.5,423.6 1257.4,399.2 1296.9,1086.2 1332.7,1728.0 249.2,1718.4 217.4,1141.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0454/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[197.0,840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6118286,39.2732562]}},{"type":"Feature","properties":{"resourceCoords":[739.0,592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6105885,39.2737657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0455/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p455","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0455/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0455","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.1,1074.5 151.5,382.4 512.2,356.1 878.6,329.4 1217.8,297.0 1267.9,1138.7 1265.0,1726.0 1265.0,1779.1 1265.3,2045.3 1262.9,2045.3 1258.8,2045.3 1251.9,1773.5 342.1,1753.5 258.6,1767.3 233.3,1771.5 232.7,1721.0 194.1,1074.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0455/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[926.0,1138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6074918,39.2728836]}},{"type":"Feature","properties":{"resourceCoords":[1265.0,1726.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6066253,39.2718547]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0456/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p456","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0456/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0456","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"605.2,255.9 678.7,247.0 763.5,244.1 803.7,351.0 1078.8,371.9 1080.4,552.3 824.7,554.7 768.9,663.5 771.5,938.4 778.6,938.1 1273.1,1367.7 1275.0,1368.7 1254.6,1409.5 1189.8,1538.9 1172.9,1572.7 1136.2,1669.3 1142.3,1724.7 157.8,1737.7 155.2,1146.5 97.0,299.9 605.2,255.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0456/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[507.0,1733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6058156,39.2718916]}},{"type":"Feature","properties":{"resourceCoords":[762.0,555.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6053483,39.2740283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0457/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p457","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0457/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0457","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"469.6,1910.0 357.9,1935.7 207.7,1939.5 243.2,1885.0 166.3,763.0 217.2,137.9 1251.6,145.9 1269.2,434.6 1258.8,563.8 1228.0,719.7 1117.6,1311.2 1006.0,1887.0 927.0,1886.0 926.9,1910.5 469.6,1910.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0457/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[882.0,143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.612449,39.2716295]}},{"type":"Feature","properties":{"resourceCoords":[615.0,1303.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.612917,39.2695012]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0458/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p458","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0458/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0458","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1424.2,147.3 1424.8,197.8 1397.9,202.2 1308.4,339.1 1297.6,674.1 1346.8,729.0 1285.2,1449.0 1353.9,1557.2 1291.0,1889.4 1254.0,1907.9 14.0,1910.3 14.0,1888.1 14.0,1885.7 93.2,1886.4 203.1,1309.5 311.8,717.0 342.1,560.8 352.1,431.4 333.5,142.4 1424.2,147.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0458/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[680.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6107745,39.2716942]}},{"type":"Feature","properties":{"resourceCoords":[691.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6105995,39.2695754]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0459__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 | 1902 | sanborn03573_007 p459 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.22"},{"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":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0459__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0459","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.1,1986.4 121.0,2017.2 416.4,2026.8 751.1,2010.1 814.8,1956.1 1235.9,1968.7 1291.7,1921.5 1376.5,1254.4 1294.3,1173.5 1269.0,941.8 797.9,896.5 722.4,896.5 722.4,889.2 718.0,888.8 637.8,67.4 105.1,60.4 97.3,43.5 53.3,1725.8 76.0,1837.3 76.1,1986.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0459__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[76.0,42.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6092091,39.2685993]}},{"type":"Feature","properties":{"resourceCoords":[76.0,1994.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6138016,39.2683052]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__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 | 1902 | sanborn03573_007 p460 [1]","metadata":[{"label":"streets","value":"6"},{"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":"5800.0"},{"label":"split_canvas_h","value":"8268.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.1,199.9 125.3,732.2 146.7,1857.6 494.4,1871.5 631.5,1813.2 678.2,688.6 914.7,703.1 952.2,816.7 1099.1,825.7 1099.8,739.8 1157.7,740.4 1189.5,16.5 1135.8,16.6 1126.0,16.6 1094.8,95.0 1100.0,149.7 128.4,147.2 128.1,199.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[122.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6064725,39.2697336]}},{"type":"Feature","properties":{"resourceCoords":[473.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6058156,39.2718916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__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 | 1902 | sanborn03573_007 p460 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2745.2"},{"label":"split_canvas_y","value":"3609.2"},{"label":"split_canvas_w","value":"3054.8"},{"label":"split_canvas_h","value":"4658.8"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"904.3,1976.1 951.0,1880.3 1110.1,1878.0 1423.8,1251.7 1423.9,1215.5 1171.3,1087.8 846.2,923.3 825.9,964.4 806.2,1004.0 761.3,1094.5 744.4,1128.5 738.1,1145.3 802.7,1143.9 784.5,1880.7 725.6,1881.2 726.5,1968.7 904.3,1976.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0460__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[846.2,923.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6040721,39.2726088]}},{"type":"Feature","properties":{"resourceCoords":[1110.1,1878.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6033689,39.2709199]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0461/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p461","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0461/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0461","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"336.3,758.5 336.3,760.5 335.5,1118.9 334.9,1413.1 333.6,1980.7 389.8,1998.1 754.0,1992.0 1045.6,1984.7 1133.4,1971.7 1133.3,2007.8 1348.8,2002.1 1279.0,1847.4 1268.1,365.1 1209.3,342.8 1126.2,142.7 968.1,224.7 859.9,16.4 856.0,16.0 852.5,2.2 851.9,1.0 851.5,1.0 848.0,9.0 835.0,12.0 799.0,9.0 798.1,1.0 731.0,1.0 731.0,8.0 723.0,14.0 704.1,14.0 490.2,125.1 493.7,131.2 336.3,758.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0461/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[754.0,759.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6036711,39.2733034]}},{"type":"Feature","properties":{"resourceCoords":[754.0,1992.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.601027,39.2723795]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0463/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p463","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0463/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0463","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.0,1453.2 142.7,965.4 138.7,73.6 195.6,91.1 564.1,84.3 859.1,76.5 947.9,63.2 947.9,99.7 1165.9,93.6 1203.3,176.2 1365.1,242.7 1406.4,479.1 1382.7,1806.5 1421.2,1810.1 1421.1,1813.7 1275.4,1934.8 1274.8,1912.7 966.8,1896.6 966.8,1887.9 142.0,1894.5 128.8,1891.3 135.9,1869.6 124.6,1463.2 142.0,1453.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0463/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,1612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5981969,39.2705524]}},{"type":"Feature","properties":{"resourceCoords":[142.0,1893.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5976018,39.2703436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0467/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p467","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0467/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0467","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.5,1866.7 135.7,1114.7 71.5,291.3 143.4,81.9 156.6,85.2 982.4,90.7 982.3,99.4 1290.4,120.0 1295.4,526.2 1296.7,526.0 1319.7,522.1 1285.9,985.9 1274.2,985.6 1325.8,1308.5 1349.2,1308.7 1325.5,1609.2 1318.2,1609.0 1333.7,1912.6 1309.9,1912.3 328.1,1898.6 193.3,1900.1 110.4,1887.4 119.5,1866.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0467/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[963.0,1606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5936132,39.2705794]}},{"type":"Feature","properties":{"resourceCoords":[145.0,1012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5956365,39.2696579]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0468/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p468","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0468/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0468","type":"ImageService3","width":1454,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"111.4,993.4 123.1,993.5 151.1,531.4 128.2,535.5 117.6,153.6 266.9,30.0 1303.9,129.8 1410.9,294.6 1408.7,598.8 1321.6,769.1 1333.7,811.9 1265.0,1616.5 1266.8,1917.2 523.3,1916.0 182.1,1915.4 162.9,1613.4 170.2,1613.4 190.1,1314.0 166.8,1314.1 111.4,993.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0468/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[560.0,1313.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5935356,39.2720392]}},{"type":"Feature","properties":{"resourceCoords":[560.0,1916.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5922531,39.2715919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0469/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p469","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.52"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0469/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0469","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"728.1,1940.3 13.0,1880.3 13.0,1880.0 13.0,1878.0 13.0,1860.0 104.7,1833.8 162.2,1423.2 123.9,1338.5 243.7,1221.5 158.8,1016.6 152.2,360.4 228.2,216.1 201.7,157.4 465.2,46.0 1169.5,41.3 1332.3,54.0 1355.9,91.8 1351.3,91.8 1375.3,1298.0 1336.6,1283.5 1346.2,1893.3 1016.0,1890.0 1016.0,1938.0 728.1,1940.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0469/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1016.0,1230.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.590862,39.2739717]}},{"type":"Feature","properties":{"resourceCoords":[1016.0,1938.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5915733,39.2727548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0470/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p470","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.33"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0470/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0470","type":"ImageService3","width":1450,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.9,1.0 120.5,1.0 145.2,1264.2 104.7,1249.2 114.5,1888.3 1298.7,1900.7 1393.5,1785.6 1367.9,1780.9 1401.2,671.9 1298.6,463.3 1267.0,156.8 797.4,155.3 375.8,41.5 160.5,56.6 125.9,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0470/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[404.0,1935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5902268,39.2722835]}},{"type":"Feature","properties":{"resourceCoords":[86.0,1935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5909005,39.2725193]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0471/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p471","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0471/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0471","type":"ImageService3","width":1438,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"193.8,149.4 327.5,146.3 1300.8,148.2 1317.4,148.2 1308.5,466.7 1299.3,466.6 1337.4,782.5 1329.2,782.5 1364.0,1110.7 1343.8,1110.6 1320.8,1410.1 1340.5,1884.8 882.9,1919.8 162.4,1787.2 72.5,228.5 111.5,137.8 193.8,149.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0471/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[953.0,1109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5909216,39.2696408]}},{"type":"Feature","properties":{"resourceCoords":[953.0,467.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5922929,39.2701187]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0472/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p472","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0472/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0472","type":"ImageService3","width":1441,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"492.5,158.3 1236.0,160.6 1286.1,160.7 1266.0,1685.8 1380.5,1780.5 1342.2,1987.2 1189.9,2031.0 276.2,1892.6 165.7,1901.0 146.3,1424.2 169.8,1123.5 190.0,1123.7 155.4,794.0 163.7,794.0 125.8,476.9 135.0,476.9 144.3,157.2 492.5,158.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0472/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5905843,39.2716668]}},{"type":"Feature","properties":{"resourceCoords":[526.0,794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5909034,39.2711165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0474__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 | 1902 | sanborn03573_007 p474 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"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":"2827.6"},{"label":"split_canvas_w","value":"2663.2"},{"label":"split_canvas_h","value":"1698.4"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0474__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0474","type":"ImageService3","width":1443,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.8,1095.0 599.5,1128.9 630.0,793.0 478.6,729.9 114.3,733.0 48.7,815.0 77.8,1095.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0474__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,706.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.5853154279352,39.26877560523575]}},{"type":"Feature","properties":{"resourceCoords":[665.8,706.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.58425480166976,39.26965598306525]}},{"type":"Feature","properties":{"resourceCoords":[665.8,1131.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.58353251358562,39.26912706090297]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1131.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.58459313985107,39.26824668307347]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0475/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_007 p475","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.51"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0475/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0475","type":"ImageService3","width":1446,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"515.1,10.0 168.2,145.5 83.8,699.8 85.6,1105.0 141.9,1215.8 90.4,1389.5 153.8,1552.9 52.9,1796.0 549.0,1929.7 910.8,1883.2 1328.5,2047.1 1369.8,2047.0 1377.0,1572.2 1385.3,704.2 1393.4,145.2 683.5,137.6 619.0,10.0 615.0,10.0 614.1,1.0 511.1,1.0 515.1,10.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0475/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1376.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60151544757024,39.27169079374311]}},{"type":"Feature","properties":{"resourceCoords":[1376.0,94.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.60280268215358,39.272125762371765]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0481__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 | 1902 | sanborn03573_007 p481 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.89"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5712.0"},{"label":"split_canvas_h","value":"3954.0"}],"created":"2026-10-24T14:54:33Z","modified":"2026-10-24T14:54:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0481__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0481","type":"ImageService3","width":1428,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.4,884.5 480.9,981.5 917.6,899.7 1301.5,972.0 1402.7,604.1 1360.6,124.2 920.7,123.7 515.2,35.4 160.7,113.9 122.8,268.7 54.3,294.9 53.4,884.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190204:03573_04_1902-0481__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56360968313997,39.29377128262611]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56027206175094,39.293905861127904]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,988.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56015171391341,39.29211924215202]}},{"type":"Feature","properties":{"resourceCoords":[0.0,988.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.56348933530245,39.291984663650226]}},{"type":"Feature","properties":{"resourceCoords":[314.0,586.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5628044,39.2927412]}}]}}]}