Question

I'm not sure if this is exactly history, but it's about patrol maps.
I'm a bit confused with the description provided in my lesson. I'm supposed to make a patrol map. I know it's about the time it takes to walk between different landmarks you can see. So when you make a patrol map do you just write, "walk 5 mins to the rig red rock, 3 mins to the oak tree, etc", or do you have to draw it like a regular map?