The Library of Congress digital collections represent a broad sampling of the institution's vast physical holdings. They include newspapers, photographs, films, audio recordings, and an impressive collection of U.S. maps from the Library of Congress Geography and Map Division which date from the discovery and exploration of the nation and cover a wide range of topics.
Among the Library of Congress online collection includes many maps that would be of particular interest to researchers of Sacramento and California history. The collection is broken down into six categories: Cities and Towns, Cultural Landscapes, Conservation and Environment, Military Battles and Campaigns, Discovery and Exploration, and Transportation and Communication. Highlights include a ca. 1650 pen-and-ink and watercolor map of California shown as an island, detailed bird's-eye sketches of dozens of California cities (1850s-1900s), and railroad maps showing transcontinental and California lines.
Maps can be searched by topic, date, location, creator or title, and almost all are free of copyright restrictions. All of the online Library of Congress geography and map collections are available at http://www.loc.gov/rr/geogmap/guides.html.
IMAGE CREDIT: [Map of California shown as an island], Joan Vinckeboons, ca. 1650. Henry Harrisse collection ; v. 2, map 10. Library of Congress Geography and Map Division, Washington, D.C.