Hello Christian. I believe I didn't quite understand what you have said but I think that is not the way. My basemap is a r.clump output in CELL format that ranges from 1 til 1700 or something my cover map is NDVI that ranges from -1 (near) til 1 (near) and is a FCELL.
My Objective. calculate for each clump, the average of NDVI pixels If I do: r.statistics -c base=new_clump cover=2007_ndvi method=average I get: ERROR: This module currently only works for integer (CELL) maps Is there any alternative to do this? Thank you Christian and the rest of grass mailing list Monica On Mon, Feb 28, 2011 at 5:08 PM, Christian Schwartze < christian.schwar...@uni-jena.de> wrote: > If you want to deal with raster value types other than CELL, you can use > the –c flag in r.statistics in order to process the labels. Therfore, you > have to copy your cat values to the category labels first... > > Regards, > Christian. > *From:* Monica Buescu <monicabuescu1...@gmail.com> > *Sent:* Monday, February 28, 2011 5:16 PM > *To:* Christian Schwartze <christian.schwar...@uni-jena.de> > *Cc:* GRASS user list <grass-user@lists.osgeo.org> > *Subject:* Re: [GRASS-user] calculating average value over a base map > > Greetings Christian > > Unfortunely it only works with CELL values. For instance, r.median uses > more than just CELL. > Is there any other alternative? Beucase for mode and median there is > specific functions. > > Thamls > > Best regards, > Monica > > On Mon, Feb 28, 2011 at 3:55 PM, Christian Schwartze < > christian.schwar...@uni-jena.de> wrote: > >> Monica, >> >> try to use r.statistics with the average function/method. Pass you maps >> through the cover= and base= parameters... >> >> Christian. >> >> *From:* Monica Buescu <monicabuescu1...@gmail.com> >> *Sent:* Monday, February 28, 2011 4:27 PM >> *To:* GRASS user list <grass-user@lists.osgeo.org> >> *Subject:* [GRASS-user] calculating average value over a base map >> >> Greetings >> >> I have a map with values and a base map created with r.clump. How can I >> calculate the average of values that falls inside each cluster defined by >> r.clump? >> Thanks >> >> Best regards, >> Monica >> ------------------------------ >> _______________________________________________ >> grass-user mailing list >> grass-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/grass-user >> > >
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