Pick a place you want to map. Your backyard, school playground, or a nearby park are good examples. Make a rough sketch of the place you are mapping. Draw in everything you see, like trees, fences, and streams. Try to notice anything that might give your army shelter or let them hide from the enemy.
Pacing is one of the ways Civil War mapmakers used to measure distance.
It's important to be accurate. To measure distance by pacing, first figure out the average length of your step. Mark a point on the ground and walk to another point a few yards away. Count how many steps you take while you walk between the two points. Write down the number of steps on your paper.