I have the same issues and frustrations with my in-dash Garmin navigation compared to my iOS device. It would seem that a device made specifically for navigation would out perform a mobile smartphone. GPS systems that use augmentation (NGPS, WAAS, CORS) are supposed to provide coordinates with an accuracy of 10-15 centimeters. Of course, your BB and my iPhone would need to be nuclear powered to support all of the similtaneous communications necessary to make this work.

An accuracy of two meters is more than reasonable. When a minimum of three satellites are providing information, the accuracy is consistent. When weather and atmospheric conditions become a factor, we need to look to other methods for determining position. I lose my satellite radio signal when driving under a bridge or through a tunnel.

To your point, the accuracy of the location return by the GPS does not matter if the coordinate system of the mapping software isn't accurate.

Great stuff! Thanks for the comments.