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.

Provides historical United States Geological Survey maps of the San Francisco Bay area, from Point Reyes in the north to Half Moon Bay, and east to San Jose. Includes maps from different time periods—the earliest is from 1895, the latest 1997—covering each 7.5-minute and 15-minute quadrangle of the area. Users may zoom in to see minute details. Searchable by quadrangle or place name. Of value for those studying change over time in the development of the Bay Area during the 20th century.

A collection of historical and modern maps, this site features more than 150 maps showing early exploration and subsequent land use. The maps show a variety of information, including landscape changes over time, natural and man-made features, recreation and wilderness areas, geologic features, topography, wetlands, vegetation, and wildlife. A series of conservation maps focuses especially on the growth and development of national parks.

The maps have been categorized by purpose, and fit into one of seven categories: Conservation and Environment, Discovery and Exploration, Immigration and Settlement, Military Battles and Campaigns, Transportation and Communication, Cities and Towns, and General Maps.

This website offers more than 400 images of historic maps charting 400 years of development in Illinois and the northwest territory. The collection of maps can be browsed by state or geographic area or by categories such as early maps, topographic maps of Illinois, Indians of North America, waterways, and transportation. Types of maps include maps showing roads and canals, topographical maps, French and Spanish colonial maps, maps of railways, city maps, county and township maps, maps showing regions of settlement, and sectional state maps.

A zoom and pan feature allows the map images to be examined in detail and bibliographic information is provided with each map image. A keyword search is available. An excellent source of historic maps.

This large collection of maps from the 16th century to the present day focuses on Americana and cartographic treasures.

Materials are organized into seven thematic categories—Cities and Towns, Conservation and Environment, Discovery and Exploration, Cultural Landscapes, Military Battles and Campaigns, Transportation and Communication, and General Maps. Sections include five special presentations.

Users may download maps or zoom in to view details. Seventeen specific map collections contained within this larger site that are of particular importance for the study of American history include "Discovery and Exploration," "The American Revolution and Its Era," "Railroad Maps, 1828–1900," "American Colonization Society Collection: Maps of Liberia, 1830–1870," "Panoramic Maps, 1847–1929," "Civil War Maps," and "Mapping the National Parks."