2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.
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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.
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.
2000. Harvard Map Collection, United States. National Imagery and Mapping Agency, and Land Info (Firm). This polygon is an index to 1:500,000 scale maps of the world, titled 1:500,000 TPC (Tactical Pilotage Charts) : worldwide US military aviation/top... Harvard Map Collection.
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.
2002. Geological Survey (U.S.). This raster layer is a georeferenced grid map image of land cover characteristics for North America, excluding Hawaii, and including the Caribbean ... Geological Survey (U.S.).
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.