Helmut wrote: > ... > > in my experience overlaying kml (vector and raster) > > with EPSG:4326 in google > > earth works relatively well in flat areas, in mountain > > areas there are > > sometime distortions therefore. Markus: > I can confirm this from my (limited) experience to export > data to KML. To correct for the geoid heights, you could use > the previously indicated map and calculate the local > ellipsoid-geoid difference and vertically shift your vector > data with v.transform. > Then export to KML. For raster, use r.mapcalc to shift.
n.b., IIUC raster KML support in google earth is essentially a hack building on/abusing their raster-icon support. they may have improved things, but this is what I was lead to believe at the time of writing r.out.kml. probably it is useful to consider if the ellipsoid-geoid difference is important vs. the overall vertical differences in the data, if the result is just for viewing maybe it is not worth the trouble. Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
