[GRASSLIST:8943] Re: distance algorithim

[Hamish]

> r.mapcalc "area.one=1"
> r.cost -k input=area.one output=distance start_rast=past_sites
> r.mapcalc "distance2=if(isnull(present_sites),null(),distance)"
> r.mapcalc "dist_meters=distance2 * (ewres()+nsres())/2."
> r.stats -1 -n input=dist_meters

> This takes about the same cumalative amount of time as my module, 


oh yeah, try using 100 percent memory in r.cost to speed things up.



Hamish