Research Guides: Maps: Map Libraries and Databases

Geography & Map Reading Room (Library of Congress)
The Geography and Map Division of the Library of Congress contains the largest and most comprehensive cartographic collection in the world.
University of North Texas: Government Documents Map Collection
This page lists major items in the UNT Libraries Government Documents Map Collection, and includes links to selected map collections on the Internet.
Perry-Castaneda Library Map Collection (UT Austin)
The Perry-Castañeda Library Map Collection (PCLMC), comprising more than 350,000 items representing all areas of the world, provides comprehensive cartographic resources to serve constituents both within and beyond the university’s walls.
John R. Borchert Map Library
From the University of Minnesota, the John R. Borchert Map Library specializes in cartographic collections and geospatial services that support research and instruction. The Map Library also contains unique collections of cartographic materials related to Minnesota.

Map Databases

The National Geologic Map Database (USGS)
The National Geologic Map Database Project (NGMDB) is a collaborative effort primarily involving the
USGS and the Association of American State Geologists (AASG). Includes maps, historical topographic maps, stratigraphy, standards & guides, and Geologic Map Schema.