Thanks Paulo, your suggestion of combining r.neigbors and r.patch worked.
From: Paulo van Breugel <p.vanbreu...@gmail.com> > Subject: Re: [GRASS-user] 'Growing' a raster on the edges only > Message-ID: <516ba41a.4060...@gmail.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Try r.neighbors function with the mean or medium neighborhood > operation, or, if you are working with categorical values, use the > 'mode' neighborhood operation. You can combine the result with the > original layer using r.patch so only the no-data cells at the borders > are filled with the newly created values > > You may also have a look at r.fillnulls, which fills in no-data cells > using spline interpolation. > > Paulo >
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