[GRASS-user] r.average issue with rasters at different resolutions

[Margherita Di Leo]

Matteo,


On Sat, Oct 19, 2013 at 3:31 PM, matteo poletti <pollo1_91 at yahoo.it> wrote:

> Hi all,
>
> I have an issue with the module r.average. I'm testing the module with a
> constant cover map so that I know the result I should get, but the output
> map has a different value. I have this problem only when I use a cover map
> and a base map with different resolutions.
>
> Does anybody know how to fix this problem?
>

This is not a problem of the grass module. Which kind of map is the base
map? If you compare the average you get from 2 base maps at different
resolutions, you probably will get two different values. Particularly, if
for example your map is slope, the higher is the cell size, the smaller
will be the average slope.
HTH

-- 
Best regards,

Dr. Margherita DI LEO
Scientific / technical project officer

European Commission - DG JRC
Institute for Environment and Sustainability (IES)
Via Fermi, 2749
I-21027 Ispra (VA) - Italy - TP 261

Tel. +39 0332 78 3600
margherita.di-leo at jrc.ec.europa.eu

Disclaimer: The views expressed are purely those of the writer and may not
in any circumstance be regarded as stating an official position of the
European Commission.
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