Vydavatel U.S. Geological Survey, Department of the Interior
Datum vydání před téměř 10 roky
US
beta
Shrnutí
Popis
This data set portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the individual State roads layers from the 1:2,000,000-scale Digital Line Graph (DLG) data produced by the USGS. This is a revised version of the March 1999 data set.