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@mapsetprova raster=provaspline > column=ripelite > > ERROR: Need either 3D vector or layer and column with z values > > What's the problem? > Thanks > Pietro > > -- > View this message in context: > http://osgeo-org.1803224.n2.nabble.com/Help-in-using-Grass-plugin-to-interpolate-point-data-tp7150158p7150334.html > Sent from the qgis-user mailing list archive at Nabble.com. > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user