Hi.

Thats what I thought of, plus: My Garmin only recalculates the speed about every 4 seconds (sometimes even slower). And you can be sure that we have quite a few locations around here (well, not necessarily in Dortmund, but in Duesseldorf or Cologne), where GPS reception is almost impossible and you still need to know how far away your next turn is. Also, if the car is standing, or moving at walking speed, I noticed that the GPS reported heading is often _far_ away from truth.
Also, when you leave the originating place, how should the GPS/nav system know whether you are already heading in the right direction, or should turn 180°?

Compass is really usefull I would guess (but that isn't available through ODB-II either), and mileage/speed is useful in tunnels and also sometimes when driving between tall buildings (especially if they are made of concrete with a lot of iron in it).

That isn't meant to stop Kim from releasing his software, but I would like to mention these additional information sources for his software, and would like to discuss their optional integration with the system.

I would love to see a little box that can be stuck in the serial line, which adds an interface to ODB-II (for speed/mileage) and possibly a small, not necessarily highly accurate, compass. Mind you, I don't know anything about electronic readable compasses at all except for the fact that they exist.

cu,
sven