Description: U.S. National Transportation Atlas Interstate Highways represents rural and urban interstate highways. U.S. National Transportation Atlas Interstate Highways is part of the National Highway Planning Network, published by the Federal Highway Administration as part of the National Transportation Atlas Databases for the United States.
Copyright Text: Members of the Geographic Information Systems Laboratory, Pellissippi Research Institute, The University of Tennessee, Knoxville.
Description: U.S. Census Block Groups represents the Census block groups of the United States in the 50 states, the District of Columbia, and Puerto Rico.