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USGS Maps

Both topographic and thematic maps produced by the United States Geological Survey are available at NCSU Libraries.

USGS Topographic Maps

topo map clip

Collection
The only USGS Topographic printed map collection still retained by the NCSU Libraries are 1:24,000 (7.5 minute) North Carolina maps.

Location
The latest printed 1:24,000 scale topo maps for North Carolina are available in D. H. Hill Library on the second floor along the North wall facing Hillsborough St. Some are also available at the Natural Resources Library. Older topographic maps for North Carolina are retained permanently at the Libraries' Satellite Shelving.

Access
1:24,000 scale maps are stored alphabetically by quadrangle names. Recent maps are listed in the online library catalog. Topographic indexes online can be found at Mapsport.

Online digital options
Practically all USGS topographic maps are accessible online:

Downloaded maps are often in GeoPDF format which open using Adobe Acrobat Reader. For even more options when using a GeoPDF, install the Terrago Toolbar plugin for Acrobat Reader.

To convert a GeoPDF to a GeoTIFF for use in GIS software, G-Raster is a great tool. The conversion option is only available for registered versions, and registration costs only $5. A registered copy of G-Raster is available on a GIS workstation at D. H. Hill Library.


USGS Thematic Series

Includes Coal Investigations, Geologic Quadrangles, Hydrologic Investigations, Miscellaneous Geologic Investigations, Land Use and Land Cover, Miscellaneous Field Studies, Mineral Investigations Resources, Oil and Gas Investigations, Charts and Maps, Circum-Pacific maps, and State Hydrological Unit Maps.

Location: Satellite Shelving Facility.  While most thematic series maps are shelved in the Maps Collection, some series, such as the Water Resources Investigations maps, are shelved with the U.S. Government Documents.  If you don't find what you need, ask a librarian for assistance.

Access: Hydrologic Unit maps are filed by state. Other maps are filed by their USGS number. You may use the online National Geologic Map Database or the hardcopy index to obtain filing numbers for these map series. Guide to USGS Publications - D. H. Hill - Reference QE77 .G84 1996.


Online USGS maps

National Geological Map Database -- View selected online maps produced by the USGS.

Digital Raster Graphics -- Digitized and georeferenced USGS topographic maps are available in a number of different ways.

Contact

For more information, use Ask Us or contact:

Jeff Essic
Data Services Librarian
(919) 515-5698
jeff_essic@ncsu.edu