Hi there, I've finished my holidayand brought you a problem with the elevationprofil. What I did: Generate elevationlines, merged them to osm-data generated a map (in end 12/2012) with style-rules and set-profile=1. The shown elevation-lines were almost correct, but the estimated altimeters generated by my Oregon 300 out of the profile were very bad and doesn't fit to reality and the elevation-lines. As example I've chosen the incline of Arthurs Pass in New Zealand ( http://www.openstreetmap.org/?lat=-42.8397&lon=171.6113&zoom=12&layers=Q ). This is the generated profile: http://www.aighes.de/data/71.bmp This is the route: http://www.aighes.de/data/133.bmp This is the recorded profile (which fits with reality and elevation-lines): http://www.aighes.de/data/profile.png Does anybody discovered similar effects? I'm pretty new to using set-profile=1, so maybe this isn't a bug in mkgmap and I made just an error. Henning, who is very surprised about the things happend to mkgmap during my holiday...great!!!