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1. 1:1,000,000-Scale Major Roads of the United States, 2012

2012. Geological Survey (U.S.). This map layer portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the indivi... Geological Survey (U.S.).

2. 1:1,000,000-Scale State Boundaries of the United States, 2012

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.

3. Airports of the United States, 2012

2012. Geological Survey (U.S.). This point shapefile includes airports in the United States, Puerto Rico and the U.S. Virgin Islands. The data were derived from an extract of the ... Geological Survey (U.S.).