This article describes a feature in the first Apocalypse Rising

The map is a utility in the game Apocalypse Rising. It spawns anywhere, and is fairly common. They can be accessed by the player by pressing "M" or going into their inventory, selecting it, and clicking "view". This helps the player navigate the area. Any player can easily traverse the land with the help of a map, compass, and a GPS.

The fact that you can roam freely gives player the opportunity to walk or run at their own will. Just look out for players that may be hostile.