Phone sensor assisted positioning

awi

Have you considered if it'd be plausible to interpolate points between gps points, using sensor data? I'm sure the sensor data output is "messy", but median filter for each vector could do wonders.

Also some smoothing using spline math for representation wouldn't hurt and isn't hard to implement.

awi

...actually when thinking about it, using splines to determine travelled distance on given set of points gives probably improved accuracy over straight line from point-to-point. Besides racing line presentation, that could be also useful when plotting/comparing the data.

And about interpolation from sensor data above; besides position you could also interpolate speed changes.

aol_of_RaceChrono

I'll email you