if you see someone using the coordinate system -41, +55, 12 for example that is referring to the x,y,z axis. I belive x is east and west, y would be north and south, z would be vertical position. There is another way to use it the /waypoint command if you follow it up with the coordinates , /waypoint -41,55,12, it will show you on the map with an X and have the wisp trail show you if you are close enough.
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