Virginia digital raster graphics (DRG) data 1:24,000 scale topographic maps
Summary
A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) standard series topographic map, including all map collar information. The image inside the map neatline is georeferenced and fit to the Universal Transverse Mercator projection. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map. The map is scanned at a minimum resolution of 250 dots per inch. Read the full USGS description online. Dates for all the DRG's at this site is included in the Alphabetical List of the 1:24,000 Quads.
Data made available by the Virginia Dept of Mines Minerals and Energy.
Files
DRG Data files are available from the Research and Instructional Services Department's GIS server.
Please read the Introduction, including a Disclaimer before downloading any files.
DRG Tiff Images
- Virginia Coverages Index Map
- Alphabetical List of the 1:24,000 Quads
- Instructions
- Documentation for downloading and viewing the DRG data files
