[GRASSLIST:8573] Re: Changing scale of raster map

[Gordon Keith]

On Tue, 11 Oct 2005 01:35, Bruno GUILLAUME wrote:
> Dear GRASS users,
>
> My problem concerns a raster in lat-lon projection, having a given
> resolution of ewres1,nsres1. For every cell, the category value is
> expressed in kilogram.
> I need to transform it into  the same grid but with coarser resolution,
> say ewres2=10*ewres1 and nsres2=10*nsres1, BUT the transformation need
> to be mass-conservative (so, I need to get exactly the same amount in
> kilograms with finer and coarser resolution).
>
> Can I do in a simple way with GRASS ?

Depends on which version you are using.

In version 5:
r.to.sites
g.region
s.cellstats
s.to.rast

Version 6 doesn't have an equivalent to s.cellstats

Regards
Gordon


-- 

Gordon Keith
Programmer/Data Analyst
Marine Acoustics
CSIRO Marine and Atmospheric Research
http://www.cmar.csiro.au

42.7% of all statistics are made up.