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.
This image showing the Black Hills and Badlands, South Dakota is a mosaic of multiple Landsat 8 scenes acquired in 2015 and 2016.
Public Domain.
