Description: Point locations for airports and airfields in the USA. U.S. National Atlas Airports represents airports in the United States, Puerto Rico, U.S. Virgin Islands, and U.S. Possessions with airport passenger enplanements of greater than or equal to 100 passengers per year.
The Airport point layer is public use airports extracted from The Public- Use Airports database of the National Transportation Atlas Databases-2001 (NTAD-2001), published by the Department of Transportation, Bureau of Transportation Statistics.
Copyright Text: National Transportation Atlas Database
Description: Polygon locations for airports and airfields in the USA. U.S. Airports represents airport grounds and airport runways within the United States. All airports have a boundary, and most have at least one runway.
Copyright Text: National Transportation Atlas Database
Description: The Rail Network is a comprehensive database of the nation's railway system at the 1:100,000 scale. The data set covers all 50 States plus the District of Columbia.
Railroads are linear features representing the nation's railway system at a 1:100,000 scale. The railroads layer is produced by the Federal Railroad Administration (FRA) and distributed as part of the National Transportation Atlas (NTAD). Note that, due to source differences and the inclusion of historical rail lines and rights of way, there may be differences in location and coverage between this layer and the railroads depicted in the Virtual Earth basemap layer.