2014. National Atlas of the United States. This line shapefile includes Global Map data showing the coastline of the United States, Puerto Rico, and the U.S. Virgin Islands. The United State... National Atlas of the United States.
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2014. Environmental Systems Research Institute (Redlands, Calif.). This line shapefile represents the boundaries for the continents of the world. World Continents provides a base map layer of the continents for the... Environmental Systems Research Institute (Redlands, Calif.).