Loc

LOC stands for Location
The game world uses a coordinate-based location system. You can get the loc of a particular position with the /location command (typically abbreviated to '/loc'). This will return three numbers which corresponds to your current position. The first two numbers correspond to your X,Y coordinates in the current zone. The third number corresponds to your Z-axis (altitude).

It is generally a good idea to map a hotkey to this command so it can be easily used when trying to find a particular location.

The X,Y Coordinates Map like this:

                   (North)
                     ^+X
                     |
                     |
                     |
                     | 
                     |
(West)               |               (East)
+Y <--------------------------------->-Y
                     |
                     |
                     |
                     | 
                     |
                     v -X
                   (South)