I'm not sure, but when using the NTv2 grids you must use also the "+wktext" parameter, otherwise the grid will be ignored. It is possibile that the same applies to +tows84.
cheers -- Giovanni -- On Mon, 2011-06-20 at 13:10 +0200, Claas Leiner wrote: > Hi, thanks for answer > > the parameters are > > ETRS89 / UTm32: > +proj=utm +zone=32 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs > > wgs84 > +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +towgs84=0,0,0 > > DHDN GK3: > +proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel > +towgs84=582,105,414,1.04,0.35,-3.08,8.3 +units=m +no_defs > > From ETRS89/UTm32 to wgs84 and then to DHDN GK3 the result ist right > In one Step From ETRS89/UTm32 to DHDN GK3 the result ist wrong. > > Claas > > Am 20.06.2011 12:43, schrieb Paolo Cavallini: > > Il giorno lun, 20/06/2011 alle 12.40 +0200, Claas Leiner ha scritto: > >> When I Export a Shapefile from ETRS89/UTM 32 to DHDN Gauss-Krueger 3 the > >> new Layer is more then 150 m wrong. When In export from ETRS89/UTM 32 to > >> wgs84 und then from wgs84 to DHDN Gauss-Kruger 3 the result ist right. > >> (qgis 1.6 and qgis 1.7). > >> > >> Is there a way to change the projektion fro, ETRS89 to Gk3 in one Step? > > > > You miss the datum shift (+towgs) parameters. > > All the best. > > _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
