This 1995 exhibition presents approximately 70 maps designed to help "understand [Thomas] Jefferson's views of the West and the nature of the quest to the Pacific," and to "show the evolution of cartographic knowledge of North America up to the time that [Meriwether] Lewis and [William] Clark set out."

Arranged into five sections, it treats the period from the arrival of Columbus in North America to Lewis and Clark's 1803 voyage.

Well-written background essays describe relevant monographs and journals, explain the role of technology in mapmaking, and elucidate the social and intellectual contexts of Western exploration.

The site, which offers both European and American perspectives, also furnishes eight related links and a 31-title bibliography.

Particularly useful for understanding the evolution of geographic knowledge about North America and for tracing the history of cartography during this period.

By the time Thomas Jefferson became the third President of the United States in 1801, interest in exploring the West had begun to shape U.S. policy. This chronological narrative traces Jefferson's life, participation in politics, and accumulation of scientific geographical knowledge from 1735 to 1804. There are four main sections: "The Jeffersons and Their Frontier Virginia Neighborhood," "From Colony to Commonwealth," "Science and Statecraft at Home and Abroad," and "Public Servant to the Early Republic."

This narrative is accompanied by an archive of 169 letters, statues, books, treaties, maps, and journals providing primary source insight into Jefferson's thoughts about the West and the Lewis and Clark expedition in particular. Three interactive maps from the 1700s, overlaid with historical data about cities, private dwellings, natural features, courthouses, and waterways, provide important insight into the geographic and social environment at the time.

A PBS companion site for the film The Journey of the Corps of Discovery by Ken Burns. The site contains brief biographies of members of the expedition, historical sketches of the Native American tribes encountered by Lewis and Clark, a semi-searchable selection of transcribed journal excerpts from seven expedition members, over 800 minutes of unedited interviews with scholars and other specialists, over 30 links to related websites, a bibliography, and an interactive story section.

The site also offers teaching resources, including lesson plans and printable activity sheets, as well as a video interview and email forum with filmmaker Ken Burns. An easily navigated site.