[GRASSLIST:4587] Re: aggregate a higher resolution to a lower resolution

[Ulrich Leopold]

good point, Markus. Nobody answered this before. But is it easy to implement 
for 2x2. Or could there even be a work around by an awk script or something 
like that? Is it easy to use awk inside grass? I am currently using 
grass5.0.0pre5.

Ulrich

Markus Neteler wrote:
> On Fri, Sep 13, 2002 at 04:00:49PM +0100, Glynn Clements wrote:
> 
>>Ulrich Leopold wrote:
>>
>>
>>>I would like to aggregate my map from a 250x250m resolution to a 500x500m 
>>>resolution. If I use resample the nearest neighbor is used. Is there a 
>>>possibility to just average 4 250x250m blocks (like overlay a grid and 
>>>average) instead of nearest neigbor? So that I derive a mean and a variance?
>>
>>Apart from r.resample, there's also r.resamp.rst, which does spline
>>interpolation. However, I'm not aware of anything which resamples
>>using a simple average.
> 
> 
> Maybe already answered...
> Doesn't r.neighbor method=average size=something do the job?
> But you cannot resample 2x2 with the current implementation.
> 
>  Markus
> 

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Ulrich Leopold MSc.

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