{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03609_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Hagerstown, Maryland | 1904 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"64"},{"label":"placed","value":"33"},{"label":"unplaced","value":"31"},{"label":"fit sources","value":"georef-snap 17, georef 15, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"13 sheet(s) cut into 41 panels"},{"label":"unplaced pages","value":"p10__1 (tier 1, 39.64588,-77.72598 +/-100m); p22__2 (tier 1, 39.64986,-77.71393 +/-105m); p24__2 (tier 2, 39.63760,-77.72185 +/-140m); p25__2 (tier 1, 39.62421,-77.72557 +/-205m); p26__1 (tier 1, 39.64046,-77.73513 +/-173m); p26__2 (tier 1, 39.63976,-77.73499 +/-166m); p26__3 (tier 1, 39.64114,-77.73548 +/-100m); p27__1 (tier 4, 39.64339,-77.72164 +/-1641m); p27__2 (tier 4, 39.64339,-77.72164 +/-1641m); p27__3 (tier 4, 39.64339,-77.72164 +/-1641m); p28__1 (tier 1, 39.64694,-77.73186 +/-176m); p28__3 (tier 1, 39.64699,-77.73395 +/-100m); p29__2 (tier 1, 39.63725,-77.71354 +/-100m); p29__4 (tier 1, 39.63681,-77.71553 +/-100m); p29__5 (tier 1, 39.63805,-77.71529 +/-100m); p29__6 (tier 1, 39.63644,-77.71541 +/-100m); p31__2 (tier 1, 39.63888,-77.73036 +/-114m); p31__3 (tier 1, 39.63718,-77.72615 +/-100m); p32__1 (tier 4, 39.64339,-77.72164 +/-1641m); p32__2 (tier 4, 39.64339,-77.72164 +/-1641m); p32__3 (tier 4, 39.64339,-77.72164 +/-1641m); p33 (tier 1, 39.64996,-77.73114 +/-222m); p34 (tier 4, 39.64339,-77.72164 +/-1641m); p35__1 (tier 4, 39.64339,-77.72164 +/-1641m); p35__2 (tier 4, 39.64339,-77.72164 +/-1641m); p35__3 (tier 4, 39.64339,-77.72164 +/-1641m); p35__4 (tier 4, 39.64339,-77.72164 +/-1641m); p35__5 (tier 4, 39.64339,-77.72164 +/-1641m); p36 (tier 4, 39.64339,-77.72164 +/-1641m); p37__1 (tier 4, 39.64339,-77.72164 +/-1641m); p37__2 (tier 4, 39.64339,-77.72164 +/-1641m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p10 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.7,1481.7 71.8,1466.7 524.1,1502.6 576.5,1848.3 814.6,1802.8 1420.3,1912.0 1424.7,1912.0 1536.8,1642.8 1542.5,1646.0 1555.1,1550.3 1608.2,872.7 1593.3,472.2 1593.5,60.3 1558.3,60.4 1055.7,60.5 811.0,57.4 38.5,64.4 41.8,477.8 48.9,888.0 37.3,892.5 43.9,1129.6 38.8,1128.1 47.7,1481.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1589.0,873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72536976619936,39.64446434416944]}},{"type":"Feature","properties":{"resourceCoords":[73.0,873.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72845820219317,39.645948502055454]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"19.6,1247.8 62.0,1406.6 97.2,1394.0 35.2,1679.4 12.0,1688.2 47.6,1874.9 63.5,1879.2 185.4,1912.0 214.5,1912.0 214.4,1887.6 472.4,1867.8 897.3,1867.0 1052.2,1868.8 1510.1,1773.1 1486.3,1539.2 1586.5,1477.6 1580.0,1123.8 1585.2,1125.2 1580.2,888.0 1591.8,883.5 1587.5,473.0 1587.2,59.4 1390.3,59.1 948.7,53.4 294.2,48.2 1.0,46.5 1.0,86.4 56.4,104.5 50.9,1238.9 19.6,1247.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[480.0,1259.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.73127164563648,39.64643311266865]}},{"type":"Feature","properties":{"resourceCoords":[1571.0,882.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72856706944381,39.645971171446526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p12","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.7,649.6 76.0,251.0 74.3,64.7 74.0,24.2 859.9,86.7 859.9,80.7 1387.2,90.9 1391.4,118.2 1606.7,82.2 1464.1,502.6 1450.5,535.6 1507.2,1033.0 1544.3,1317.9 1607.4,1741.6 1612.0,1835.8 1594.0,1846.0 1431.5,1835.5 79.6,1841.2 74.7,649.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[76.0,251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7148725,39.6447094]}},{"type":"Feature","properties":{"resourceCoords":[76.0,1040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7158703,39.6434578]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"216.2,977.6 216.4,178.9 611.0,183.9 1377.7,175.2 1374.6,571.2 1374.4,1754.8 695.2,1754.9 217.9,1751.7 216.2,977.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1363.0,961.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71589634977433,39.64346554275582]}},{"type":"Feature","properties":{"resourceCoords":[1363.0,1768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71691645277687,39.64217346357113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"976.2,1756.0 218.8,1748.7 220.4,919.0 217.5,158.5 705.8,168.1 979.2,162.9 1382.4,170.9 1384.1,976.3 1387.6,1756.8 976.2,1756.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[227.0,951.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72065270052114,39.645716362283764]}},{"type":"Feature","properties":{"resourceCoords":[1388.0,160.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71726660260997,39.645845658186694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.0,1756.7 145.0,1756.7 120.0,264.9 668.6,182.6 668.5,178.8 1454.8,178.1 1461.4,935.9 1463.8,1762.6 1246.0,1761.2 1088.6,1763.7 172.0,1756.7 146.0,1756.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[946.0,963.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7217223737966,39.64623554397966]}},{"type":"Feature","properties":{"resourceCoords":[686.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72124750000839,39.647750001120556]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p16","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.6,1872.0 842.1,1872.9 1091.5,1878.8 1603.9,1883.8 1612.0,1883.9 1612.0,1213.0 1612.0,754.6 1596.0,374.1 1360.9,51.3 1277.7,119.8 916.1,26.8 914.4,1.0 867.7,1.0 866.0,31.5 490.1,20.8 137.6,24.9 240.1,789.8 53.9,700.9 51.2,848.5 55.0,1054.0 55.0,1457.0 57.2,1656.3 54.6,1872.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[55.0,1457.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7269907,39.647893]}},{"type":"Feature","properties":{"resourceCoords":[55.0,1054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7264964,39.6485171]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.0,1852.5 749.8,1857.5 1186.2,1863.1 1380.8,1863.4 1382.6,1654.2 1379.8,1460.8 1378.4,1069.8 1374.1,870.5 1376.2,727.2 1557.0,812.9 1455.0,71.1 1449.3,68.9 1447.5,1.0 1447.2,1.0 1431.8,57.7 1126.1,42.4 850.0,144.3 608.5,123.4 426.0,184.7 1.0,110.8 1.0,149.8 132.8,175.6 125.7,635.5 111.5,1271.8 110.2,1467.8 103.0,1852.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[745.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7287860485332,39.6479104686542]}},{"type":"Feature","properties":{"resourceCoords":[1266.0,9.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72537998812886,39.65031692906107]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p18 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.87"},{"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":"3569.6"},{"label":"split_canvas_h","value":"5512.8"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.1,98.6 61.9,107.2 29.4,1316.3 342.4,1352.0 640.3,1294.5 810.0,812.4 859.1,54.8 886.9,48.8 732.9,48.1 310.4,50.0 310.4,51.7 54.0,73.2 25.4,97.6 29.1,98.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[310.1,556.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7326971,39.6446867]}},{"type":"Feature","properties":{"resourceCoords":[717.3,556.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7318633,39.6442862]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p18 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2437.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4014.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1464.2,81.5 1155.2,27.6 923.2,84.0 879.0,670.5 683.8,1375.5 790.5,1731.6 1272.5,1889.9 1272.5,1850.1 1568.0,1852.0 1575.5,1461.0 1576.9,1261.8 1591.7,615.1 1599.1,147.6 1464.2,121.2 1464.2,81.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[893.2,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7315044,39.6491689]}},{"type":"Feature","properties":{"resourceCoords":[1568.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7301301,39.6485192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p18 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5494.0"},{"label":"split_canvas_w","value":"2442.4"},{"label":"split_canvas_h","value":"2158.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"587.7,1785.2 527.2,1730.7 589.1,1507.4 536.5,1400.1 24.1,1426.3 7.0,1909.2 576.6,1874.8 587.7,1785.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0018__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[175.9,1493.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7267104,39.6525283]}},{"type":"Feature","properties":{"resourceCoords":[175.9,1713.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7270967,39.6522599]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p19","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1370.2,1535.2 1372.1,1718.7 612.2,1731.7 221.0,1729.0 221.0,944.0 223.9,237.2 224.1,177.7 1378.3,177.7 1376.7,954.3 1368.2,1334.2 1370.2,1535.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[221.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7162813,39.6470974]}},{"type":"Feature","properties":{"resourceCoords":[221.0,1729.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7172919,39.6458339]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"871.8,1788.3 868.9,1912.0 350.1,1912.0 98.6,1621.9 101.3,1338.9 96.2,454.8 97.0,64.0 875.9,61.7 1338.9,72.8 1336.5,989.5 1612.0,996.0 1612.0,1013.2 1543.5,1021.8 1599.2,1495.0 1562.4,1816.7 1505.5,1859.7 1200.3,1754.7 908.8,1849.3 910.5,1861.7 871.8,1788.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,1007.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7185061,39.6372752]}},{"type":"Feature","properties":{"resourceCoords":[97.0,64.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.718928,39.6395716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"239.9,997.3 240.7,406.3 239.2,99.9 250.2,128.1 421.9,185.6 837.1,26.2 1064.0,39.4 1417.4,279.9 1417.2,310.7 1411.2,1032.8 1407.9,1834.7 1003.0,1826.4 728.5,1831.5 238.2,1821.5 239.9,997.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1407.0,1015.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71626770343475,39.64712954020589]}},{"type":"Feature","properties":{"resourceCoords":[234.0,1015.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71867407181186,39.64826004043164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"245.8,1908.9 20.3,1597.4 57.5,1566.9 49.8,47.7 694.5,34.0 1076.7,112.2 1468.1,25.8 1539.4,32.8 1573.3,120.3 1573.9,421.3 1571.3,1001.9 1567.0,1811.4 788.6,1805.5 788.6,1809.2 244.9,1885.9 245.8,1908.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1147.0,979.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71949857759338,39.648733267122374]}},{"type":"Feature","properties":{"resourceCoords":[1558.0,979.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71863859721776,39.64833211702637]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0022__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p22 [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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1557.2,1762.3 1555.8,1041.2 1559.0,273.8 1537.3,13.4 1515.3,1.0 1511.9,1.0 1460.2,32.1 779.8,27.1 473.6,643.3 53.2,676.4 21.2,1635.5 18.1,1635.3 368.3,1876.6 368.7,1846.8 1541.8,1858.5 1557.2,1762.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[381.0,1841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71525558779389,39.64832525574766]}},{"type":"Feature","properties":{"resourceCoords":[1540.0,1841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71285756966667,39.64721315199573]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"753.5,1825.5 751.5,1811.8 485.9,1805.4 485.9,1808.4 90.1,1775.1 89.8,1692.7 95.3,1498.3 98.6,1101.0 106.1,1052.6 104.0,689.6 104.2,303.4 92.8,172.4 97.7,155.4 93.0,98.5 128.0,85.7 262.8,110.7 520.5,77.9 593.9,93.2 633.5,137.4 877.4,194.3 1173.5,189.6 1351.0,116.0 1450.7,153.6 1444.1,311.4 1500.5,559.0 1480.6,695.0 1404.5,865.1 1425.6,942.0 1382.0,1327.3 1342.4,1402.7 1355.9,1467.1 1287.3,1508.8 1182.0,1504.4 1060.4,1578.3 1056.8,1614.6 1132.7,1763.9 1005.7,1784.5 849.1,1845.4 862.1,1807.9 753.5,1825.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[487.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71027853606101,39.64771110007876]}},{"type":"Feature","properties":{"resourceCoords":[109.0,1694.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71431031114977,39.6452910128255]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0024__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p24 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0024__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"365.2,404.4 478.6,535.4 539.4,948.6 396.3,1069.5 259.8,1078.5 228.7,1086.2 259.0,1295.2 189.8,1345.8 228.3,1422.5 149.4,1470.7 171.0,1574.3 255.3,1589.5 375.1,1758.1 898.9,1755.0 1037.5,1845.3 1552.8,1855.7 1563.2,1490.6 1612.0,1493.6 1612.0,1462.6 1567.2,1461.7 1569.7,1056.0 1561.8,1055.8 1559.2,650.4 1586.5,651.1 1303.2,325.3 1305.5,41.6 1279.7,33.6 831.5,40.0 870.9,123.9 476.9,89.6 434.9,1.0 384.4,1.0 216.3,402.2 365.2,404.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0024__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1302.0,636.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72132663136941,39.636541151835345]}},{"type":"Feature","properties":{"resourceCoords":[1302.0,1058.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72186838742098,39.63585875395559]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p25 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.81"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2986.4"},{"label":"split_canvas_h","value":"3488.4"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"481.9,813.5 502.1,784.2 701.2,756.2 695.1,697.6 696.6,561.9 692.0,361.0 454.0,338.8 320.9,47.9 26.4,116.4 35.0,787.5 135.6,846.6 404.9,850.9 530.6,837.2 481.9,813.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72647344696485,39.63012754685222]}},{"type":"Feature","properties":{"resourceCoords":[746.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72490593097433,39.629436111514615]}},{"type":"Feature","properties":{"resourceCoords":[746.6,872.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72595352300904,39.62802629325883]}},{"type":"Feature","properties":{"resourceCoords":[0.0,872.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72752103899956,39.628717728596435]}},{"type":"Feature","properties":{"resourceCoords":[248.9,189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.726178,39.6295915]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p25 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.58"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3465.2"},{"label":"split_canvas_w","value":"3298.8"},{"label":"split_canvas_h","value":"4186.8"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"22.9,940.0 18.3,1866.2 296.6,1873.5 296.6,1890.8 781.9,1831.5 823.5,1798.9 822.5,1677.9 655.8,1102.8 585.9,952.2 428.6,947.0 410.2,868.8 407.7,868.8 406.4,868.8 317.1,869.5 316.9,943.4 168.8,938.6 22.9,940.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0025__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[72.0,911.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7161839386776,39.63832747772105]}},{"type":"Feature","properties":{"resourceCoords":[72.0,1871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71739894339571,39.6367842599172]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0026__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p26 [4]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.91"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3304.4"},{"label":"split_canvas_y","value":"4101.2"},{"label":"split_canvas_w","value":"3147.6"},{"label":"split_canvas_h","value":"3550.8"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0026__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"831.8,1858.0 1175.0,1862.0 1540.9,1880.9 1543.3,1850.3 1588.6,1851.4 1554.5,1078.5 1426.5,1160.9 1238.2,1052.3 961.0,1137.3 927.2,1599.9 858.2,1639.8 826.1,1772.6 826.1,1855.6 831.8,1858.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0026__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[826.1,1025.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72407181711871,39.65138167772278]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1025.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72242432828105,39.65064790917967]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72349891645285,39.64921566857768]}},{"type":"Feature","properties":{"resourceCoords":[826.1,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72514640529052,39.649949437120796]}},{"type":"Feature","properties":{"resourceCoords":[1175.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7243541,39.6497063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0028__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p28 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2378.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"2014.8"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0028__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0028","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1388.0,1097.2 1412.8,1097.2 1564.8,847.2 1527.3,847.6 1539.1,683.5 843.4,644.8 79.3,747.1 39.6,905.6 96.8,1095.2 1393.2,1061.9 1388.0,1097.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0028__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[645.0,851.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.73437659815517,39.64695146383666]}},{"type":"Feature","properties":{"resourceCoords":[538.0,851.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.73462675795791,39.646994263899806]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p29 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.36"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4036.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.2,1729.9 29.8,1842.2 213.5,1796.2 445.8,1884.0 756.0,1888.7 915.7,1809.9 882.9,1491.9 682.3,1422.1 537.1,1440.5 479.9,1337.9 460.8,1186.6 586.6,606.9 575.6,520.5 571.5,520.1 512.5,519.5 512.5,514.7 508.5,514.3 471.1,101.7 279.6,45.4 285.1,17.6 264.9,62.3 204.9,54.4 182.6,114.4 174.9,261.7 1.0,647.1 1.0,798.2 31.9,811.6 16.5,891.6 160.8,961.0 163.2,1129.2 79.2,1729.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.71525575620404,39.63956891018155]}},{"type":"Feature","properties":{"resourceCoords":[1009.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.71285851070486,39.639333784284005]}},{"type":"Feature","properties":{"resourceCoords":[1009.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.7134333211149,39.635808972261536]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.71583056661409,39.636044098159076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p29 [3]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3633.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2818.4"},{"label":"split_canvas_h","value":"4582.0"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"978.5,194.1 950.1,193.5 954.1,616.4 962.4,616.5 961.1,1039.7 1007.9,1040.5 1009.0,1073.0 1409.4,1096.5 1534.9,1045.4 1505.2,784.6 1595.1,520.0 1532.2,102.0 1491.3,25.4 1488.9,154.8 946.4,157.3 947.3,158.4 978.5,194.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0029__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1488.1,1039.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7207709,39.634442]}},{"type":"Feature","properties":{"resourceCoords":[1488.1,199.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7197322,39.635741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p3","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"389.0,1291.8 240.8,969.4 219.5,856.2 223.2,244.1 296.9,261.0 618.0,268.4 1379.4,280.7 1376.9,676.7 1378.4,1572.5 1352.3,1564.3 899.3,1568.3 938.6,1653.3 540.6,1616.5 498.2,1525.7 448.0,1525.4 471.9,1469.3 389.0,1291.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1377.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7201203,39.6380597]}},{"type":"Feature","properties":{"resourceCoords":[1377.0,3371.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7228226,39.6346132]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p30","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0030","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1470.6,1830.9 1557.8,1851.4 1479.2,1291.2 1503.4,149.1 1456.8,91.7 1371.9,106.7 1307.4,30.6 1132.3,112.6 1099.8,52.7 1036.6,107.7 799.8,47.4 571.4,116.9 281.4,44.2 263.1,105.8 122.9,137.8 104.8,695.4 52.7,700.6 1.0,943.7 1.0,1279.6 276.1,1512.6 301.7,1537.1 780.8,1665.7 1057.0,1735.0 1470.6,1830.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[275.0,1529.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71237,39.6429661]}},{"type":"Feature","properties":{"resourceCoords":[1057.0,1735.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7131968,39.6415871]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p31 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"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":"6452.0"},{"label":"split_canvas_h","value":"6211.2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0031__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0031","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"27.3,59.7 144.5,399.3 130.4,865.9 47.9,844.5 59.2,938.5 133.8,973.7 131.2,1085.5 56.3,1126.8 75.1,1174.6 45.8,1205.8 414.9,1371.2 446.6,1316.3 544.8,1335.8 568.0,1422.0 777.8,1519.7 1208.3,1538.7 1283.5,1446.4 1472.2,1448.1 1490.7,1019.5 1512.5,996.9 1537.0,1013.4 1554.7,1071.5 1572.6,1034.3 1585.1,501.0 1556.4,342.3 1515.0,361.9 1491.8,333.7 1521.8,187.4 1459.4,93.5 1547.9,34.7 1082.6,46.9 1082.6,49.1 831.1,72.7 830.6,67.4 450.9,56.2 451.6,60.1 58.5,39.1 27.3,59.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72814433625014,39.640344117602794]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72483086764852,39.6386375446165]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1552.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.72694956174422,39.63616346513939]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1552.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.73026303034584,39.63787003812568]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p4","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1557.1,1315.3 1367.1,1780.8 1099.8,1779.2 915.5,1851.6 695.5,1785.0 585.0,1853.8 111.7,1851.3 110.9,1697.8 108.8,1457.5 115.0,1038.2 118.0,91.0 507.9,92.3 717.8,96.0 1290.0,91.0 1295.2,704.6 1318.3,817.7 1471.5,1138.7 1557.1,1315.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1290.0,91.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7212919,39.6407512]}},{"type":"Feature","properties":{"resourceCoords":[118.0,91.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7237077,39.6419118]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1544.0,1843.5 1289.0,1866.2 1288.5,1860.8 903.4,1847.4 904.0,1851.3 505.4,1827.8 473.7,1848.6 433.3,1731.4 241.9,1728.7 140.1,1770.2 136.6,1634.6 90.8,1630.4 26.2,1311.2 59.7,358.2 45.4,356.0 49.8,355.9 153.3,87.7 158.9,90.8 255.1,108.1 355.7,116.8 471.5,115.1 1504.0,86.6 1525.9,1030.8 1530.8,1448.9 1539.2,1688.3 1544.0,1843.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[424.0,1448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72773247376465,39.640898598584634]}},{"type":"Feature","properties":{"resourceCoords":[168.0,95.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72643453589012,39.64328128733629]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.0,477.9 37.1,110.2 1395.2,109.8 1558.4,121.0 1551.3,125.0 1506.9,416.1 1612.0,866.0 1612.0,883.7 1612.0,915.0 1554.2,932.2 1558.6,996.1 1612.0,1133.9 1612.0,1571.8 1612.0,1770.5 1462.7,1765.9 1314.7,1767.6 839.9,1755.8 41.2,1757.5 41.0,477.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1313.0,1763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71632036898049,39.63833796706652]}},{"type":"Feature","properties":{"resourceCoords":[55.0,108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.71683672542547,39.64216964421082]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"617.6,1763.0 294.1,1756.5 219.8,1739.7 228.4,1098.9 217.8,596.7 216.7,129.5 697.3,132.7 1381.3,132.6 1385.1,498.8 1385.0,1773.0 617.6,1763.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1385.0,948.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7178922,39.6408833]}},{"type":"Feature","properties":{"resourceCoords":[1385.0,1773.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.718928,39.6395716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p8","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"822.8,1761.5 610.5,1759.1 216.0,1760.0 215.8,1364.5 205.4,551.4 196.3,142.9 957.4,139.0 1370.7,133.5 1379.9,603.5 1399.2,1108.5 1401.5,1753.3 822.8,1761.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[216.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7237077,39.6419118]}},{"type":"Feature","properties":{"resourceCoords":[210.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.7226885,39.6431748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Hagerstown, Maryland | 1904 | sanborn03609_004 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T02:28:52Z","modified":"2026-10-19T02:28:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"418.9,1757.7 301.1,1755.2 199.2,1742.6 102.1,1721.6 115.8,1625.7 175.7,947.4 164.8,546.0 169.0,133.2 1095.2,145.1 1254.2,143.5 1474.3,146.1 1477.1,555.4 1475.0,1370.4 1469.1,1766.7 418.9,1757.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036091904:03609_1904-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[687.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72429515933233,39.643940745249004]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.72271395604108,39.64319750539716]}}]}}]}