National Transportation Atlas Database

The National Transportation Atlas Data (NTAD) is a set of transportation-related geospatial data for the United States. The data consist of transportation networks, transportation facilities, and other spatial data used as geographic reference. The NTAD is a cooperative effort throughout the US Department of Transportation andother Federal agencies. The Federal Highway Administration (FHWA), the Federal Railroad Administration (FRA), the US Army Corps of Engineers (USACE), the US Bureau of the Census, the National Park Service (NPS), the Federal Aviation Administration (FAA), the Federal Transit Administration (FTA), and the Bureau of Economic Analysis (BEA) supplied data for this project.

Transportation Networks are topologically connected line databases depicting the locations and centerline alignments of nationally significant roads, railroads, waterways, airways, and transitways. Nodes associated with transportation networks may represent transportation terminals or interchange facilities, junctions, or intersections with other geographic features.

See the NTAD web site for more information.

This CD-ROM is available for borrowing from Branner Earth Sciences Library.