I would like to use a GPX track as basis for navigation. That in itself is 
not a problem with osmand.

However, if you're preparing a long track, e.g. for a road trip, you'll get 
something with thousands of points. In case you use GPSies to create the 
track, the editor of GPSies reduces the track to, e.g., 3000 points. That 
makes the track rather rough.

The track is not a route, it's just a track along points. osmand offers to 
navigate along the track and also to calculate the start to the first 
point. It's also possible to start somewhere in the middle and continue on 
the track. That's all good and great.

However, between the points, osmand does no calculation but always uses a 
straight line approach. That's very confusing in road navigation. And it 
leads to a mess when osmand starts to believe you're off the track (as the 
road doesn't necessarily follow the straight line) and then calculates a 
route to the nearest point, which might be the last point behind you on the 
road, asking you to go back.

It would be much better if osmand had an option to calculate routing 
between the individual track points. That only seems to be possible if the 
track were a route. There are tools to do the conversion, but not inside 
osmand. The problem then is, that osmand tries to pre-calculate the whole 
route for all the thousands of points, which can take for ages (if it 
finishes at all).

Wouldn't it be possible to only calculate routing on-the-fly between the 
track points as you pass the track? With some logic preventing osmand to 
try to go backwards half of the time? All ingredients seem to be there...

a otherwise happy paying user

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