I had personal interest in adding this feature: I do quite a lot of bicycling and when planning routes I need to know the total elevation I have to go up - to compare with alternative routes and to estimate the length of the ride. Additionally a graph that shows the steepest parts of the route is helpful.
But now the obligatory Screenshots:
|Viewing the elevation profile of a route|
|Viewing a detail of the route|
Some words about the elevation data:
I converted the NASA SRTM3 data into png tiles which can be loaded by Marble using the standard TileLoader - so all the caching, scaling, reloading and so on could be reused. I uploaded the tiles to files.kde.org - thanks to the sysadmins for providing this server - so we don't depend on NASA for the data.
On the todo list are features like showing elevation profile for opened tracks and adding more statistics about opened tracks.
Oh, and Happy Birthday KDE!