1972. Geological Survey (U.S.). This map layer portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was crea... U.S. Geological Survey.
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1998. Causey, J. Douglas. and Geological Survey (U.S.). This datalayer is a point coverage representing mine and mineral resource occurrence data worldwide (most thoroughly within the U.S.) and was publi... U.S. Geological Survey.
2008. U.S. Geological Survey. National Populated Places 2000 is a point theme representing cities in the United States, Puerto Rico and the U.S. Virgin Islands. These cities we... U.S. Geological Survey.
2011. United States. Bureau of Transportation Statistics. This data set includes cities in the United States, Puerto Rico and the U.S. Virgin Islands. These cities were collected from the 1970 National Atl... U.S. Geological Survey.
2000. Lee M. Osmonson, USGS, Denver, CO (comp.), Feliks M. Persits, Contractor to USGS, Denver, CO (comp.), Douglas W. Steinshouer, Contractor to USGS, Denver, CO, and Timothy R. Klett, USGS, Denver, CO (comp.) and others. Geologic Provinces is a polygon theme representing U.S. Geological Survey defined geologic provinces of the World. Each province has a set of geol... U.S. Geological Survey.
1972. David G. Frank. Ore Deposits is a point theme representing ore deposits throughout the world, locational and attribute information is taken from the 1999 Mineral R... U.S. Geological Survey.