synthetic GPSImgDirection?

[RussNelson]

I'm taking time-lapse pictures on my bike, and use my (separate) GPS logger to georeference them. The camera is mounted on the handlebars, so direction of my motion is always the direction of the camera. The GPS location deltas  can tell me the direction of travel (arctan & quadrant). That could be used to set GPSImgDirection. Has anybody tried to implement this? Does it work? Can it work?

[Phil Harvey]

Many GPS loggers will already give the track direction (the NEMA RMC sentence has this information for example -- this is what I log with myself), but calculating this isn't hard with some scripting.  The trick is proper filtering so the direction doesn't bounce around too much.  I have done this using a Kalman filter in the past, with excellent results.

- Phil