Alteration to vanilla map. Differences:
1. Consumes energy when in hand (very slowly)
2. Mapped area is not limited to the size of the map "screen" and is common for all gps maps. So, if you lost one, and make new, it will be exactly same. Or if anyone else makes a map, it will be exactly same too.
Showed territory is centered on the player.
3. x,y,z coordinates are shown at the top of the map (like with f3)
4. Player can place "beacons". It's essentially same as signs, but with gps map equipped in hand, they are shown on the map (with text assigned), and also is seen "through walls" (like monster ids on f3)