An official website of the United States government
Here's how you know
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.
Latest Earthquakes | Chat Share
Learn to navigate using a topographic map and a compass.
Adjustable Declination Compasses
How To Get Your Map and Compass To Face the Same Direction
How Should I Set My GPS and Compass?
To Determine Percent of Slope and Angle of Slope
What Direction Am I Facing?
How Do I Point Myself Toward a Specific Direction?
Why Am I Adding for One Situation, But Subtracting for Another?
Magnetic Declination Varies Considerably Across The United States