Easiest way is to send a /tell to yourself like this :
/tell <name> ;loc
And that is a semi-colon. (;)
Currently, there is no mod that puts these permanently on your screen like the ones you can get in WoW.
The reason for sending it in a /tell is to not annoy other players.
Each co-ordinate will have N,S,E,W on them which is quite simply North, South, East and West.
They will also have a number, which is a distance.
A typical co-ord printout would be :
30N.30W
How do they relate to the map?
I think by now its assumed that 0.0 is central to the map you are on, and then the co-ordinates relate from that point, ie 30N.30W would be up and left of that central point on the map.
How far is 30?
I really have no idea, I don't tend to use them, but I am sure its not paces.
Edited, Jul 25th 2007 2:13am by Marliedog