Originally Posted by
GordonR_Cape
Pedantic mode: Pure GPS does not provide direction, only position. However if you move in a randomly oriented straight line, GPS will tell you which direction you have moved in, and then you can then re-orient yourself to go in the direction you really wanted. Of course most devices (such as modern phones) have a compass and accelerometer.
Could you derive track from heading, speed and acceleration? I think not. Well I couldn't