[GRASS-user] supervised classification "no subgroup files available"

[Silvia Simoni]

>
> Thanks Markus!
>
> I'm now using grass6.4.svn but I still have trouble with the  
> supervised classification process. Now I can run i.class and produce  
> the spectral signature for my map but this file is NOT readable by  
> i.maxlik. I get the following message:  Can't read signature file  
> [signaturefile].
>
> I checked in $MAPSET/group/subgroup/$SUBGROUP/sig/; the  
> signaturefile is there but it only contains 3 lines, as follows:
> #
> #comment
> single value XXXX
>
> Is this correct? I obtained other signature files from i.cluster  
> which look different from this. It seems to me that i.class doesn't  
> write the signature file correctly so that i.maxlik is not able to  
> read it.
>
> How can I overcome this problem?
>
> thanks
>
> silvia
>
> On Sep 1, 2008, at 1:30 PM, Markus Neteler wrote:
>
>> Hi Silvia,
>>
>> there have been a couple of fixes which probably didn't reach 6.3.0.
>> Could you try with 6.4.svn instead? There it will work.
>>
>> Best
>> Markus
>>
>> PS: See the list archives for older discussions on this.
>>
>> On Mon, Sep 1, 2008 at 11:19 AM, Silvia Simoni
>> <silvia.simoni at ing.unitn.it> wrote:
>>> Hi grass-users,
>>>
>>> I'm trying to run a supervised reclassification for an orthophoto  
>>> created
>>> using r.in.gdal and r.composite.
>>> Before running i.class, i run i.group to create a subgroup which  
>>> is required
>>> by i.class. [The group containing 3 files .red, .green, .blue had  
>>> been
>>> previously created during the import phase].
>>> When I run i.class the interactive screen cannot find the  
>>> subgroup, it
>>> outputs: "no subgroup files available in current mapset". I get  
>>> the same
>>> message also using i.gensig.
>>> I can see the folder and the file REF using "ls" in
>>> /Users/silvia/grassdata/location/mapset/group/subgroup/, but  
>>> somehow GRASS
>>> 6.3 cannot.
>>> The result is the i.class exits.
>>>
>>> Does anyone know what's going on? How can I create a subgroup that  
>>> GRASS 6.3
>>> can see?
>>> Thanks
>>>
>>> Silvia
>>> ----------------------------------------------------------------------------------------
>>> Silvia Simoni PhD
>>> DICA - Department of Civil and Environmental Engineering
>>> Universita' di Trento
>>> via Mesiano 77, 38100 Trento, ITALY
>>> tel. +39 0461 882610
>>> fax. +39 0461 882672
>>> e-mail: silvia.simoni at ing.unitn.it
>>>
>>>
>>>
>>> _______________________________________________
>>> grass-user mailing list
>>> grass-user at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>>
>>
>>
>>
>> -- 
>> Open Source Geospatial Foundation
>> http://www.osgeo.org/
>> http://www.grassbook.org/
>
> ----------------------------------------------------------------------------------------
> Silvia Simoni PhD
> DICA - Department of Civil and Environmental Engineering
> Universita' di Trento
> via Mesiano 77, 38100 Trento, ITALY
> tel. +39 0461 882610
> fax. +39 0461 882672
> e-mail: silvia.simoni at ing.unitn.it
>
>
>

----------------------------------------------------------------------------------------
Silvia Simoni PhD
DICA - Department of Civil and Environmental Engineering
Universita' di Trento
via Mesiano 77, 38100 Trento, ITALY
tel. +39 0461 882610
fax. +39 0461 882672
e-mail: silvia.simoni at ing.unitn.it



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