Elevation Adjustment

[routeconverter]

Anyway... I know that RC can get the elevation from geoNames.org (and it works well -- reduced the elevation to something I'd expect),

Since 2.0 RouteConverter uses a 3 level lookup for the elevation data:

1. download and usage of SRTM3 data
   
2. web service lookup to geonames.org
   
3. web service lookup to earthtools.org
   

but my concern is that if I did that for the whole track then I'd "lose" what the GPS has recorded. Does that make sense, or is that assumption incorrect??

You could only select the positions which you want to change? And there is always undo/redo :-)

So, what I was wondering is if it'd be a better alternative to have a "tool" to adjust the track's elevation by +/- n metres? Say my first point is 117m too high I could adjust all the track's points by -117m (thereby keeping the on-the-ground relativity of the recordings).

This doesn't seem to be a common use case. But if you implement it and send me a patch, I'll have a look at it.