[GRASS-user] getting i.smap to see signature file

Nikos Alexandris nik at nikosalexandris.net
Sat Jul 13 02:07:59 PDT 2013

Chris Nicholas wrote:

> > hmm - wondering why, in i.cluster, I tell it to write the resultant
> > signature file to something like "L8_test_sigs" , and when I use that same
> > name in i.smap, with the same imagery group/subgroup
> > (L8_recent/L8_subgroup), it "can't find L8_test_sigs" ...

Nikos Alexandris: 

> That is most likely because i.smap reads signatures created by using
> "i.gensigset" [0].
> > I see the file in:
> > PERMANENT/group/L8_recent/subgroup/L8_subgroup/sig
> Which is an "i.cluster" structured signatue file.

and the reference!

[0] From the manual: <http://grass.osgeo.org/grass64/manuals/i.smap.html>:

imagery signaturefile
The signature file that contains the spectral signatures (i.e., the 
statistics) for the classes to be identified in the image. This signature file 
is produced by the program i.gensigset (see NOTES).


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