Dear developers, I like to request a new feature to improve elevation profile editing for planned routes. As mentioned in my earlier request today DEM elevation data shows a wobbling effect if available only in low resolution for mountainous areas. In certain regions of the earth, like southamerica, currently it is a pretty standard to have for example only 90 m resolution. But also 40 m resolution can lead to this wobbling effect in mountainous regions like the Andes.
For planning routes this is not just a cosmetic issue but results in significant error for summing up the elevation gain for one trip. As I found planning my last years trip to Peru the error can easily sum up to 50 % or even much more. This is caused by the continuous up an down while in reality the road may have a countinuous inclination. Ofcourse the situation did not improve for my this years planning ;-). To ease planning I like to have a new feature in the "filter" section under the topic "Change elevation of track points". There currently are some options available but these are unsufficient regarding the described usecase. My proposal is to add a new linear interpolation option to take the start and the end of a marked range and do a straight away linear interpolation between these two points. So for planning a user could for example start the marked range at a point in the valley and end at a pass. The resulting error will be significantly lower than the DEM-only solution (even if smoothing is applied). Guido -- http://wie-im-flug.net/ http://www.lug-burghausen.org/
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