Bluetooth connection to built-in GPS

Smartphones drain their batteries fast when they are using GPS. And most vehicles have GPS built in now and can therefore provide GPS data to the phone. If the car would allow devices to connect to their GPS data over bluetooth. then smartphones will not need to calculate the same GPS data that the car already did.
Jeff E 01/03/2013
Data to build the maps when using GPS is the gas hog, the GPS receiver does not draw much power to run.