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.).
Search Results
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 polygon shapefile portrays the state boundaries of the United States, and the boundaries of Puerto Rico and the U.S. Virgin Islands. The map l... Geological Survey (U.S.).