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

[pieri70]

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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