The David Rumsey Historical Map Collection focuses on rare 18th and 19th century North and South America cartographic history materials. Historic maps of the World, Europe, Asia and Africa are also represented. The collection categories include old and antique atlas, globe, school geography, maritime chart, state, county, city, pocket, wall, children and manuscript maps. Genealogy and family history can be studied on the maps. The online collection, about 6,500 images, is an expanding cross section of digital images designed to highlight the depth of the collection. The site contains more than 50 complete rare atlases, including Thomas Jefferys's American Atlas (1776), Guillaume Delisle's Atlas de Geographie (1731) and John Arrowsmith's London Atlas (1844). You will also find maps from the Philadelphia and London editions of Lewis and Clark's History of the Expedition... (1814) and numerous maps of explorations of the American West by Pike, Long, Fremont, Warren and others. The digitized maps are very high resolution images scanned at at least 300 pixels per inch. NOTE: A special Geographic Information System (GIS) Browser allows integration and interaction of historical maps with current geospatial data and other historical maps. Examination of the maps in GIS reveals changes in the history of the areas shown on the maps. Eleven historical maps of the San Francisco Bay area from 1851 to 1926 from the David Rumsey Collection are now available for viewing in the GIS Browser. Other major U.S. cities will be added later. (Updates vary)
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