The few maps they have vary greatly. For example, sometimes the Anauroch is like an ellipse, sometimes it's almost u-shaped, extending past some of the northern mountain ranges. The Dales, Moonsea and Cormyr all seem to wander about from map to map. Evereska seems huge and close sometimes, tiny and far other times. The Moonsea changes in more than one way, sometimes appearing tiny, other times larger.
What's WoC's problem in providing us with a proper map? Do they think it would spoil the fun? Is it lack of interest? Incompetence?
I really doubt I'm the only one frustrated by this lack of precision... I could bet a real fortune that a great lot of players are mathematically inclined like me, and feel almost anguish at those inconsistencies.
The question is: why can't WoC release a canon map of Toril? We'd still be able to add stuff to it! Islands, kingdoms cities and empires of our own, no problem! But the stuff that's canon shouldn't move around from one supplement to the next. What's their reasoning for doing that?