[Qgis-user] Export to new Projektion

[Giovanni Manghi]

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.
> 
>