The Player Map is part of the interface in Darkwood.
It displays all the discovered locations, and can be accessed using the M key.
Locations on the map seem to be based on a grid pattern, which can be utilized to locate various locations on the map. The best way to do this is to find a location, the easiest of which is the Wolfman's camp, and simply move in one direction (without turning) until you come across a location. Avoid straying from your path as doing so may result in you being lost in the forest.