[GRASS-user] MAP Calculator mean of eight neighbors to interpolate 0 value in raster map

[Milton Cezar Ribeiro]

Hi stephen,

just to remember not include yourmap[0,0]
bests
milton
2009/8/28 stephen sefick <ssefick at gmail.com>

> I think so- let me try it
>
> On Fri, Aug 28, 2009 at 12:04 PM, achim<ak7 at jupiter.uni-freiburg.de>
> wrote:
> > r.mapcalc "newmap = if ( yourmap==0 , ( sum( yourmap[-1,1] ,
> > yourmap[0,1] , ...)/8 ) , yourmap)"
> >
> > is that what you mean?
> >
> > stephen sefick schrieb:
> >> if(0, (sum([-1,1], [0, 1], [1,1], [-1,0], [0,0], [1,0],[-1,-1],
> >> [0,-1],[1,-1])/8))
> >>
> >> I want to use mapcalc to do the above.  I am missing a syntax step.
> >> if a value is zero take the average of the eight nearest neighbors and
> >> replace the value with this.  Otherwise, keep the value unchanged
> >>
> >
>
>
>
> --
> Stephen Sefick
>
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
> make us feel like gods.  We are mammals, and have not exhausted the
> annoying little problems of being mammals.
>
>                                                                -K. Mullis
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