这是路易士和克拉克远征队的地图，你知道达科达在哪里吗？

出处: Lewis, Samuel. "A map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean: by order of the executive of the United States in 1804, 5 & 6 / copied by Samuel Lewis from the original drawing of Wm. Clark ; Saml. Harrison, fct.." 1814. Map Collections: 1544-1999, Library of Congress.