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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2014. 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.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 15 degree intervals. Graticules... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 15 degree intervals. Graticules... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 1 degree intervals. Graticules ... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 1 degree intervals. Graticules ... North American Cartographic Information Society.
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.
2007. This polygon shapefile is a representation of the coverage area for 2G mobile communications networks around the world in 2007. The data is created... Collins Bartholomew Ltd.
2007. This polygon shapefile is a representation of the coverage area for 3G mobile communications networks around the world in 2007. The data is created... Collins Bartholomew Ltd.
2008. This polygon shapefile is a representation of the coverage area for 2G mobile communications networks around the world in 2008. The data is created... Collins Bartholomew Ltd.