Interpolate direction

[nomeata]

Is your feature request related to a problem?

I wish I could use MovingPandas to analyze paragliding tracks, and I am mostly looking for a nice way to interpolate the tracks and query various parameters at certain times.

Describe the solution you'd like

I see there is add_direction which adds the direction between adjacent points. But for working with an interpolated track (e.g. using get_position_at), I’d also expect to be able to run get_direction_at with a suitable interpolation.

[nomeata]

Upon further thought, I notice that I am not sure whether movingpandas even performs interpolations (like splines) where the direction changes between adjacent points, so maybe the request is pointless because it’s only linearly interpolating?

[anitagraser]

Indeed, MovingPandas performs linear interpolation and there is no spline interpolation so far.

[nomeata]

Thanks, and sorry for the incomplete research. Feel free to close or keep open as it's more useful to you. For my purposes I'll play with https://docs.scipy.org/doc/scipy/reference/generated/scipy.interpolate.splprep.html and see if that works.

[anitagraser]

Given the lack of splines, maybe the kalman smoother could help instead: https://movingpandas.readthedocs.io/en/main/trajectorysmoother.html