[GRASS-user] Aggregation of massive number of raster layers with r.series

[Robert Andrew Brown]

Have you tried r.mapcalc using "nested if statements"?

Sent from my iPhone

> On Apr 20, 2017, at 6:50 PM, Pierre Roudier <pierre.roudier at gmail.com> wrote:
> 
> Hi,
> 
> I am trying to compute the 95th percentile of a massive grid (12+
> million pixels) for a massive number of layers (~2500 layers).
> 
> I am doing the aggregation using r.series on our cluster running grass
> 7.2, but of course it takes ages (21% there after 3 days).
> 
> - I tried to tile the process, but it doesn't seem to help much.
> 
> - Is there any benefit for me to switch to t.rast.aggregate? My
> understanding was that it was a wrapper around r.series.
> 
> - Does anyone have a fancy trick to make the aggregation go faster
> (parallelisation)?
> 
> Cheers,
> 
> Pierre
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