My mistake, Alister is right. Raster Grid Interpolation is one of the options you have to perfom an interpolation from your points to a raster.
On Sat, Aug 6, 2011 at 1:04 PM, Alister Hood <[email protected]>wrote: > Hi, > Actually, I think the Raster Grid interpolation _is_ the correct tool, > although there are other options as has been mentioned. It is also faster > and more robust than the interpolation plugin, although that may be able to > produce better results (I don't know). > > Alister > > > Date: Fri, 5 Aug 2011 17:11:50 +0100 > > From: Alexandre Neto <[email protected]> > > Subject: Re: [Qgis-user] how to interpolate points to a grid > > To: "M.E.Dodd" <[email protected]> > > Cc: "[email protected]" <[email protected]> > > Message-ID: > > <CA+H0G_F0wsy_Mmz+KvLD5K8z4FBFgeQZ9R_0y0GccO= > [email protected]> > Content-Type: text/plain; charset="windows-1252" > > > > I don't think Raster Grid Interpolation and Polygonize are the correct > tools > > for what you pretend. > > > > Did you try the Interpolation Plugin? Make it active in the plugin > manager, > > then check this tutorial: > > > http://www.gistutor.com/quantum-gis/20-intermediate-quantum-gis-tutorials/51-inverse-distance-weighting-idw-interpolation-using-qgis.html > > > > Best Luck, > > > > Alex > > > > On Fri, Aug 5, 2011 at 2:52 PM, M.E.Dodd <[email protected]> wrote: > > > >> I have various layers of points from various shapes of sampling (not a > >> regular rectangular grid) and want to interpolate each of them to > produce a > >> set of raster images. In previous GIS I have used this was generally a > >> matter of making a boundary then telling the gis the points layer and > extent > >> as shown by the boundary and then trying various interpolation methods > to > >> see which one looked most like the real data. However I have yet to > find > >> suitable tools in Qgis to do this. The raster grid interpolate and > >> polygonise don't seem to have suitable options and when I did try them > the > >> output looked rather strange and not what I was expecting as it seemed > to > >> have missed out much of the data. > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > >
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