Holoscenes.com

Sources of Free USGS DRG Dataset Downloads

The USGS Digital Raster Graphics (DRG) files are scanned versions of the USGS 7.5 Minute Topographic Quad series. The USGS sells the images on CDROM; there are also commercial sites that resell the files via download or CDROM. Many states have made their DRG files available for free download. The free public sources of data are listed below.

The DRG files are in GEOTIFF format, which means that georeferencing information is embedded in the TIFF header so that mapping software can determine the geographic coordinates of features. The USGS DRG files include the map collar, the area surrounding the map outside the neat line and which contains the map scale and other information. Some of the sites below have processed the images to remove the collar so that the images can be readily tiled.

In most cases, the DRG files have been reprojected from the original map projection into the UTM projection. Don't be deceived by the notation visible in the map collar which may indicate a Polyconic or other projection. The DRG files produced by the USGS are in UTM projection, with the exception of portions of California. Some of the sources below have further processed the data into other projections. Usually the site will note if additional processing has been done.

Because the images are in TIFF format, they can be viewed by most popular image viewing software. The images are large, about 7-10Mb each, and a computer with limited speed or memory may have difficulty viewing the images.

For technical information about the USGS DRG files, see the USGS site at http://topomaps.usgs.gov/drg



State Datasets  Territories
FIPS CodeNameLink
ALAlabama
  • State of Alabama Geological Survey
  • AKAlaska
  • Alaska Geospatial Data Clearinghouse
  • ARArkansas
  • University of Arkansas GeoStor

  • University of Arkansas Alphabetical Listing

  • Spatial Analysis Laboriatory, U. of Arkansas
  • Libre Map Project
  • AZArizona
  • ARIA - Arizona Regional Image Archive (University of Arizona)
  • CACalifornia
  • California Spatial Information Library
  • COColorado
  • Colorado Division of Water Resources

  • Libre Map Project
  • CTConnecticut
  • University of Connecticut Libraries

  • Libre Map Project
  • DEDelaware
  • Research & Data Management Services (University of Delaware)

  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • DCDistrict of Columbia
  • Radford University Department of Geography
  • FLFlorida
  • LABINS - Land Boundary Information System (Florida Dept of Environmental Protection, Bureau of Surveying and Mapping)

  • Libre Map Project
  • GAGeorgia
  • Center for Spatial Analysis Technologies (Georgia Tech and USGS)

  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • HIHawaii
  • Hawaii Coastal Geology Group
  • USGS Hawaii Data Clearinghouse
  • Libre Map Project
  • IDIdaho
  • INSIDE Idaho (University of Idaho Library)

  • IDL Interactive Data Server (Idaho Department of Lands)
  • ILIllinois
  • Illinois Natural Resources Geospatial Data Clearinghouse
  • (partial coverage) Upper Midwest Environmental Service (Mississippi River Floodplain)
  • INIndiana
  • CAGIS - Center for Advanced Applications in Geographic Information Systems (Purdue University)

  • Electronic Atlas of Central Indiana

  • Libre Map Project
  • IAIowa
  • Natural Resources GIS Library (Iowa DNR)

  • (partial coverage) Upper Midwest Environmental Service (Mississippi River Floodplain)
  • KSKansas
  • Kansas Geospatial Community Commons (State of Kansas)
  • KYKentucky
  • KRGMAPS - Kentucky Raster Graphics Image Download Center

  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • LALouisiana
  • Atlas: The Louisiana Statewide GIS (LSU CADGIS Research Laboratory)
  • MEMaine
  • Maine GIS Data Catalog (Maine Office of GIS)

  • Libre Map Project
  • MDMaryland
  • Radford University Department of Geography

  • Libre Map Project
  • MAMassachusetts
  • MassGIS - Massachusetts Geographic Information System

  • Libre Map Project
  • MIMichigan
  • Michigan Center for Geographic Information

  • Libre Map Project
  • MNMinnesota
  • Minnesota Geodata Clearinghouse

  • (partial coverage) Upper Midwest Environmental Service (Mississippi River Floodplain)

  • MSMississippi
  • MARIS - Mississippi Automated Resource Information System
  • MOMissouri
  • Missouri Spatial Data Information Service (University of Missouri)

  • (partial coverage) Upper Midwest Environmental Service (Mississippi River Floodplain)
  • MTMontana
  • Natural Resource Information System (Montana State Library)
  • NCNorth Carolina
  • Libre Map Project

  • (partial coverage) Radford University's Department of Geography
  • NDNorth Dakota
  • North Dakota Geographic Information Systems
  • NENebraska
  • University of Nebraska Conservation and Survey Division
  • NHNew Hampshire
  • GRANIT - Geographically Referenced Analysis and Information Transfer System (University of New Hampshire)

  • Libre Map Project
  • NJNew Jersey
  • New Jersey Geological Survey

  • Rutgers Geography Topographic Map Download Depot

  • Libre Map Project
  • NMNew Mexico
  • NM Search and Rescue Resources (Los Alamos National Laboratory)
  • NVNevada
  • Nevada Bureau of Mines and Geology (University of Nevada, Reno)

  • W. M. Keck Earth Sciences and Mining Research Information Center (University of Nevada, Reno)
  • NYNew York
  • New York State GIS Clearinghouse

  • Libre Map Project
  • OHOhio
  • Ohio Department of Administrative Services

  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • OKOklahoma
  • Oklahoma Center for Geospatial Information
  • OROregon
  • Oregon Geospatial Data Clearinghouse

  • Northwest Forest Plan Regional Ecosystem Office
  • PAPennsylvania
  • PASDA - Pennsylvania Spatial Data Access (Penn State University)

  • Libre Map Project
  • RIRhode Island
  • Rhode Island Geographic Information System

  • Libre Map Project
  • SCSouth Carolina
  • South Carolina Dept. of Natural Resources Data Clearinghouse

  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • SDSouth Dakota
  • South Dakota Department of Environment & Natural Resources
  • TNTennessee
  • Tennessee Spatial Data Server
  • Libre Map Project

  • (partial coverage) Radford University Department of Geography
  • TXTexas
  • Texas Natural Resource Conservation Commission
  • UTUtah
  • Utah Division of Water Rights
  • VAVirginia
  • Radford University Department of Geography

  • Libre Map Project
  • VTVermont
  • Libre Map Project
  • WAWashington
  • Washington State Geospatial Data Archive (University of Washington)

  • Northwest Forest Plan Regional Ecosystem Office

  • Libre Map Project
  • WVWest Virginia
  • West Virginia Department of Environmental Protection

  • Radford University Department of Geography

  • Libre Map Project
  • WIWisconsin
  • Wisconsin Department of Natural Resources

  • (partial coverage) Upper Midwest Environmental Service (Mississippi River Floodplain)
  • WYWyoming
  • Wyoming Geographic Information Advisory Council
  • Territories  State Datasets
    FIPS CodeNameLink
    ASAmerican Samoa
  • Fagatele Bay National Marine Sanctuary
  • FMFederated States of Micronesia 
    GUGuam 
    MHMarshall Islands 
    MPNorthern Mariana Islands 
    PRPuerto Rico 
    PWPalau 
    UMU.S. Minor Outlying Islands  
    VIVirgin Islands of the U.S.