Hi guys & girls

Does anybody know what map system microsoft uses for fs9,
when I put my
plane on any given position in FS that position is not
the same on my other
map ( 1:25000 ) the position is of by some 200-300 m.
This means that when I try to make new scenery it will be
displayed in the
wrong place.

Cheers
Benny
EKYT