The science behind land navigation is as fascinating as the physical journey itself. If you want to learn more, I’ve got your back. Most quality maps will be marked with the local declination at time of production. If the map is less than current, you can find your local declination very easily online through reliable websites like the one @noaa runs. You will use this information when orienting your map to match the terrain around you, as well as taking directional measurements known as azimuth