Samples of Digital Mapping Products
Note: These data files are for use in geographical
information systems for analysis and integration with other geospatial data.
They are not directly viewable
using WWW browser or image viewing tools. The USGS offers free software for
viewing some digital cartographic products, including DLG-O, DEM, DLG/SDTS
and DRG data. These viewers run on Windows 95/NT only. They are tools
for data preview, and are not substitutes for commercial geographic
information system (GIS) software.
- DOQ (Digital Orthophoto Quadrangles)
- DEM (Digital Elevation Model)
- DLG (Digital Line Graph)
- DRG (Digital Raster Graph)
Freeware Viewers
Translation and Display Software:
DLGV32
-- Windows 95 software for viewing USGS Digital Line Graph Optional (DLG-O),
Digital Raster Graphic (DRG) data, and Spatial Data Transfer Standard (SDTS) data.
U.S. Department of the Interior |
U.S. Geological Survey (USGS) | EROS Data Center (An official website of the U.S. government.)
