7 Apr
2009
7 Apr
'09
10:58 a.m.
I just happened across this link which may be relevant. You are probably already aware of it, of course, but I don't think it's yet been mentioned in this thread: <URL: http://wiki.openstreetmap.org/wiki/Route_altitude_profiles_SRTM > It's not exactly the same thing, but there are probably some common elements...