There is no such thing as a "good map source" its all relative. BTW - the best map sources is local government who is constantly updating their towns, roads, addresses, etc. Oh and that data is free, so its not always "you get what you pay for" when it cone to mapping.
Originally Posted by MSgtMel
Needs, Thanks for the fantastic examples, though the second one is easy to explain. It is a definite data base base problem. Your two-way ramp to the North bound road is only recognized as one-way - note the arrow on the print out showing traffic direction. There are many of these types of error behind a number of the problems I've experienced. Hey, you pay cheap prices for data and you get crummy data. Now if BMW would just buy a decent map source a goodly number of our problems would go away. But then there's the logic(?) algorithm for using the data to generate a route, etc.
2013 535i Space Grey, Biege, M-SPort, Premium, Tech, Cold Weather, Luxury Seating, PDC, 6MT ED-10/11/2012 - PCD Redelivery-12/14/12