GI Hunt and Camp Gear Info

Determine Your Unknown Location!

Resection: This is the process by which you can determine your unknown ground/map location from two known/identified locations on the map. It is critical that the following steps be performed in sequence:

• Orient the map using the compass;
• Identify two or three known distant locations on the ground and mark them on the map;
• Measure the magnetic azimuth to one of the known positions from your location using a compass.
• Convert the magnetic azimuth to a grid azimuth;
• Convert the grid azimuth to a back azimuth. Using a protractor, draw a line for the back azimuth on the map from the known position back toward your unknown position;
• Repeat 3, 4, and 5 for a second position and a third position, if desired;
• The intersection of the lines is your location. Determine the grid coordinates to the desired accuracy.

Accuracy will depend on your ability to use a map. Compass, protractor, and follow the steps listed above.