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.
Examples for relatively (A) complex and (B) simple landscape configurations are shown. Photographs are from Google Inc. The spatial extents are same for the two figure panels (roughly 2 km × 2 km).
