One of the maps says it is for use with ROTC training manuals, so there is probably a manual around someplace that has a bunch of activities that relate back to the map (e.g., find a “saddle” on this map or find a “mine” on the map). Likely it was for training folks how to use a map like this with a compass.
The folks who would have been trained on how to use the map (along with the protractors etc) would not have had to be AT Fort Benning to learn how to use the tools (intellectually). From my desk here in Ohio, I could calculate the distance between two points, make decisions about how to flank another group of soldiers, etc.