[GRASS-user] Re: Using i.gensig- How to keep original values

[Nick Jachowski]

I'm having a similar problem whereby every time I run i.gensig followed by
i.maxlik it results in a single class for all the pixels.  This doesn't
happen when I use i.cluster with i.maxlik.  I haven't analysed the sig file
closely to see if the problem might be there, but I will try that tomorrow.
 At any rate, perhaps this is related to the problem Helena and Antonio are
reporting.

- Nick

On Wed, Nov 17, 2010 at 6:51 PM, Helena Herrera <helenaherrera1980 at gmail.com
> wrote:

> I had exacly the same problem. My solution was, by-hand, creating a reclass
> file and then run this.
>
> But, as far as I can see this is a major failure of i.gensig and
> Classification methdology. Or are we (me and Antonio) seeing this wrong?
> because, if training map sets values as 1000 or 2 or 3, they shold be kept
> in signature file, in order to be used in i.maxlik
>
> has anyone any solution?
> Helena
>
>
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