[Qgis-user] Re: Help in using Grass plugin to interpolate point data

[Giovanni Manghi]

Hi,

In the QGIS GUI it seems it is missing the dropdown to allow select the
column with the values to be interpolated. You can file a ticket about
this, it should be easily fixed.

>From the GRASS shell you must add also the "layer=" parameter, as it is
described in the man page

example

v.surf.bspline input=point_vector raster=interpolate_surface layer=1
column=attrib_column

cheers

-- Giovanni --


On Wed, 2012-01-04 at 05:06 -0800, pieri70 wrote:
> Ok,
> after a conversion to grass vector layer i get an error saying:
> 
> ERROR: Need either 3D vector or layer and column with z values
> 
> The vector layer has a column named ripelite that qgis read as double.
> 
> in Grass the same error
> 
> v.surf.bspline -c input=pippopippo at mapsetprova raster=provaspline
> column=ripelite
> 
> ERROR: Need either 3D vector or layer and column with z values
> 
> What's the problem?
> Thanks
> Pietro
> 
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