Ok, before you say there has already been the only truthful map... read:
In the thread Chapter 4 - revealed there has been signs that in the Echovald Forest, Ascalonian Patterns were found. So could this be that the global map of guildwars is this:
I know I might be soo off but I also heard that Cantha lies to the North (forgot where though). Tyria lies to the West-Centre and Elona to the South.