2005. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
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2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Easements features for the United States. The USGS Protected Areas Database of the United States (P... Gap Analysis Program (U.S.).
2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for the United States. The USGS Protected Areas Database of the United S... Gap Analysis Program (U.S.).
2005. Gap Analysis Program (U.S.). This polygon shapefile contains PAD-US Fees features for the United States. The USGS Protected Areas Database of the United States (PAD-US) is the ... Gap Analysis Program (U.S.).
2005. Reed, John Calvin, Jr. 1930- and Bush, Charles A. This line shapefile contains text labels (for display purposes) of geologic lines coverages for Alaska, Hawaii, Puerto Rico and the U.S. Virgin Isl... Geological Survey (U.S.).
2005. Reed, John Calvin, Jr. 1930- and Bush, Charles A. This line shapefile contains lines with labels and tags for major geologic units in Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. In add... Geological Survey (U.S.).
2005. Reed, John Calvin, Jr. 1930- and Bush, Charles A. This polygon shapefile contains polygon boundaries, tags and labels for major geologic units in Alaska, Hawaii, Puerto Rico and the U.S. Virgin Isl... Geological Survey (U.S.).
2005. EROS Data Center. The grayscale North America shaded relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with... National Atlas of the United States.
2005. Oak Ridge National Laboratory. The LandScan 2005 global population dataset is a worldwide population database compiled on a 30" X 30" latitude/longitude grid. Census counts (at s... Oak Ridge National Laboratory.
2005. Geological Survey (U.S.). This point shapefile contains the locations and attributes of significant, historic earthquakes that caused deaths, property damage, and geological... National Atlas of the United States.