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.
US Topo annotation. Details describing the image are provided in the table in which this image is placed. A duplicate record is needed to make basic content page function properly.
Public Domain.
