2012. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.
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2012. Rukstales, Kenneth S. (compiler). This polygon shapefile represents seismic hazards in the United States. The data represent a model showing the probability that ground motion will ... National Atlas of the United States.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile depicts the boundaries of disputed areas and breakaway regions ranging from Kashmir to the Elemi Triangle and Northern Cyprus t... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile depicts the boundaries of disputed areas and breakaway regions ranging from Kashmir to the Elemi Triangle and Northern Cyprus t... North American Cartographic Information Society.