Coordinates

[Anastasia Leventi-Peetz <leventi@fgan.de>]

Hi all,
  this is a request addressed to all users, who have tried to follow 
the example wired-cum-wireless-sim.tcl, but I suppose the other
examples also.
There would be given the coordinates of two base stations in a landscape
of 670x670.
Where is the center of the coordinates system, where is null in the
animator window? The coordinates given in tcl script seem not relevant   
to the picture. Can somebody help me?
A.Leventi-Peetz