[GRASS-user] Decision tree classification

[Robert Andrew Brown]

Use raster calculator (Mapcalc) "if statements". Takes a bit to understand but works very well

Sent from my iPhone

On Feb 19, 2017, at 1:56 PM, Luiz Andrade <lcoandrade at gmail.com<mailto:lcoandrade at gmail.com>> wrote:

Hi there,
How can I make a raster classification using decision tree in GRASS (like ENVI’s decision tree)?
I have two bands and a set os rules and I wanna make a classification with those rules. Something like this:


B1=0 (using band 1)
yes->water
no-> 0<=B1<=4 (using band 1)
        yes-> B2=1(using band 2)
                  yes -> vegetation 1
                  no -> vegetation 2
        no-> everything else

Can I do this with r.mapcalc?


Regards,
Luiz Claudio




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