Markus Neteler wrote:
On Thu, Feb 19, 2009 at 2:20 PM, G. Allegri <[email protected]> wrote:
Thanks for the ideas.
I've just tried Starspan but it's performance is still too slow. I've
let it run for 15 minutes...
Can you please try GRASS 7?
grass70/scripts/v.rast.stats/v.rast.stats.py
grass70/scripts/v.rast.stats/v.rast.stats.py also uses r.mapcalc in
every pass:
for i in cats:
...
grass.mapcalc("MASK = if(...)
if v.rast.stats is faster in grass7, then probably because of improved
raster libs. A speed increase from >5 hours to 40 seconds is unlikely
since grass.mapcalc is still called 1793 times (assuming each area has a
unique category) for a region with 4415x6632 cells...
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