[GRASS-user] Re: Defining/using MMU

Jarek Jasiewicz jarekj at amu.edu.pl
Mon Jul 5 15:59:05 EDT 2010


LeeDaniel pisze:
> Hi Lisa,
>
>
> Maybe that's not the most elegant way to do things, but it's the one that
> popped into my mind. Anybody have a better method?
>   
yes, new add-on module r.area can do that. First you need run r.clump to 
create unique areas next, run r.area to remove areas smaller than 
treshold (in cells not in ha) and return binary map with 1 (leave) and 0 
(remove)

r.area -b input=classified_map output=bin_map

next
r.mapcalc removed=if(bin_map==1,classified_map,any_value_or_null)
that all.

second option is to use r.reclass.area. it work in ha so it is probably 
what you need.
> Best,
> Daniel
>   



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