When testing to see that my calculations with the Mumble coordinates were correct, I noticed that some maps have offsets. For example, I went to a waypoint in Kessex hills, and the Mumble coordinates were the same as the waypoint coordinates. In Lion’s Arch, I was somewhat east of the waypoint coordinates (even though I was standing on top of the waypoint in game), and in Caledon Forest I was northeast of the coordinates. Within a zone, the offset seems to be consistent, so I can easily write a translation map for each zone, but I’m curious if other people have noticed the same?