-
Wilderness
Abstract: This map layer consists of National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S. Virgin Islands. The map... -
Deep Seismic Reflection Studies in the Pacific Northwest U.S. Open File Repor...
From its inception in May of 1982, the U.S. Department of Energy Deep Source Gas project has investigated the possibility that significant quantities of hydrocarbons, natural... -
Railroads
Abstract: This map layer includes railroads in the conterminous United States and Alaska. This is a replacement for the December 1998 map layer. Purpose: These data are intended... -
Deep Seismic Reflection Studies in the Pacific Northwest U.S. Data Visualizat...
From its inception in May of 1982, the U.S. Department of Energy Deep Source Gas project has investigated the possibility that significant quantities of hydrocarbons, natural... -
Railway Lines
Abstract: The Rail Network is a comprehensive database of the nation's railway system at the 1:100,000 scale. The data set covers all 50 States plus the District of Columbia.... -
Navigable Waterways
Summary The RITA/BTS desires a single nationwide database that has polygons/attributes for major rivers and lakes, is consistent across state lines, and has the most accurate... -
Federal Lands and Indian Reservations of the United States
Abstract: This map layer shows Indian lands of the United States. Only areas of 640 acres or more are included. Federally-administered lands within a reservation are included...
