[GRASS-user] subsampling to a coarser resolution

[jamesmcc]

Hi Markus-

I've  used r.resamp.stats alot, but in this case it dosent appear to be
flexible enough to just select the cells I want to do stats on. It's still a
lovely routine, however. It would be nice to be able to supply it a matrix
mask to make it more flexible, then it could do what I want. Then, it could
cook me lunch too. :)

I've now tested the bilinear method in r.resamp.interp, exactly as suggested
by Glynn and it works perfectly going to coarser resolution. I imported my
interpolates/aggregates made in IDL and r.stats shows only a zero category
for the difference of the rasters! 

Still wondering about r.what and row,col inputs... 

thanks!






Markus Neteler wrote:
> 
> On Wed, Sep 2, 2009 at 4:42 PM, jamesmcc<jlmccreight at gmail.com> wrote:
>> Thanks Glynn,
>>
>> I didnt realize that bilinear was what I was doing, though I'm familiar
>> with
>> it. This should work, though I immediately become concerned by the first
>> line of the documentation
>>
>> r.resamp.interp - Resamples raster map layers to a finer grid using
>> interpolation.
>>
>> since I'm not going to a finer resolution. I noticed that you are the
>> author, so I thought I should say something! :)
> 
> see also:
> http://grass.osgeo.org/grass64/manuals/html64_user/r.resamp.stats.html
> r.resamp.stats - Resamples raster map layers to a coarser grid using
> aggregation
> 
> Markus
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
> 
> 

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