Mobile terminals, methods, and program products for generating a magnetic heading. A geographic position of the mobile terminal is determined. A magnetic field at the mobile terminal is sensed. A magnetic inclination and/or a magnetic declination of the magnetic field is determined based on the determined...http://www.google.com.au/patents/US7069145?utm_source=gb-gplus-sharePatent US7069145 - Mobile terminals, methods, and program products for generating a magnetic heading based on position
