[GRASS-web] i.gensigset

[Markus Neteler]

On Thu, Jul 9, 2009 at 1:17 PM, Stranger VIP<strangervip at yahoo.com.vn> wrote:
> I ran i.gensigset to make the training map for SMAP-classification but I had
> some errors:
>
> ...
> 4 classes found
> Reading raster maps...
> Clustering class 1 (399 pixels)...
> Number of subclasses is 2
> Clustering class 2 (105 pixels)...
> Removed a singular subsignature number 10 (14 remain)
> ...
> Too many subclasses for class index 4
> Number of subclasses set to 1
> Number of subclasses is 1
> unable to create signature file testsig for subgroup smap of group
> aster2007 at test
> Unable to create signature file <testsig>
>
> Why I had these errors? What will I do to correct? Thanks

Please check that the training areas are not too small. From my
experience this warning appears with too few pixels in a training area.

Markus