Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The National Map base layer is a vector-based map without imagery that covers the U.S. and territories. It displays, geographic names, boundaries, transportation, contours, hydrography, land cover, shaded relief, and bathymetry.
Public Domain.
