I'll address Wish.

Wish states the following:

You might be able to achieve something beyond the scope of the above examples. State your wish to the GM as precisely as possible. The GM has great latitude in ruling what occurs in such an instance; the greater the wish, the greater the likelihood that something goes wrong. This spell might simply fail, the effect you desire might only be partly achieved, or you might suffer some unforeseen consequence as a result of how you worded the wish.

As the Faerun canonically has inaccurate maps, we can assume that Wish has failed to provide accurate maps. I cannot imagine that a Wizard hasn't tried to create one in the thousands of years that Toril has been populated, after all. Heck, if we are talking magic, Wish is amateur hour when one considers ancient Netheril and the possibility of 10-12th level spells.