Hello,
yesterday I published a new plugin for JOSM called "ElevationProfile" which shows the elevation profile of a GPS trace.
You can get it via the standard plugin install mechanisms within JOSM, it requires version 3094.
A short introduction is available at osm.wiki/JOSM/Plugins/ElevationProfile.
I hope, that you find it useful.
Cheers,
Olli
Discussion
Comment from wallclimber21 on 9 April 2010 at 15:52
Just to satisfy my curiosity: where do you get the elevation data from?
Comment from Johannes69 on 9 April 2010 at 16:40
Some GPS devices provide this information - e. g. my WSG-1000 measures the altitude via pressure instead via satellite (requires calibration, but is much more accurate than the GPS elevation).