(sorry for re-sorting the message, just to keep it easy to follow-up) joel dinis: > > I trying to classify remote sensing imagery, and > > I thought to try the i.smap module, but > > when I run the i.gensigset,
Nikos Alexandris: > Please, could you copy-paste the exact command you used? > Does the "maxsig=" (e.g. maxsig=20) make any difference? joel dinis: > In fact, I put maxsig=30. > i.gensigset trainingmap=amostras group=grupo subgroup=subgrupo > signaturefile=assinaturas maxsig=30 What about smaller maxsig's, like: - maxsig=25 - maxsig=20 - maxsig=15 ? Nikos > > > I always > > get the same problem: > > ... > > Removed a singular subsignature number 1 (9 remain) > > Removed a singular subsignature number 1 (8 remain) > > Removed a singular subsignature number 1 (7 remain) > > Removed a singular subsignature number 1 (6 remain) > > Removed a singular subsignature number 1 (5 remain) > > Removed a singular subsignature number 1 (4 remain) > > Removed a singular subsignature number 1 (3 remain) > > Removed a singular subsignature number 1 (2 remain) > > Removed a singular subsignature number 1 (1 remain) > > Unreliable clustering. Try a smaller initial number of > clusters > > Removed a singular subsignature number 1 (-1 remain) > > Unreliable clustering. Try a smaller initial number of > clusters > > Number of subclasses is 0 > > Clustering class 12 (184 pixels)... > > Removed a singular subsignature number 1 (9 remain) > > Removed a singular subsignature number 1 (8 remain) > > Removed a singular subsignature number 1 (7 remain) > > Removed a singular subsignature number 1 (6 remain) > > Removed a singular subsignature number 1 (5 remain) > > Removed a singular subsignature number 1 (4 remain) > > Removed a singular subsignature number 1 (3 remain) > > Removed a singular subsignature number 1 (2 remain) > > Removed a singular subsignature number 1 (1 remain) > > Unreliable clustering. Try a smaller initial number of > clusters > > Removed a singular subsignature number 1 (-1 remain) > > Unreliable clustering. Try a smaller initial number of > clusters > > Number of subclasses is 0 > > i.gensigset complete. > > > > And afterwards the signature file doesn't have any > > spectral information. I really don't understand whats > happening > > and the cause to this outcome. > > > > Can anyone solve this "enigma"? > > > > Ps: I don't know if this information is important: I > collected > > about 450 samples distributed by 10 classes. I may also > > add that the average number of pixels per sample is around > 50. > > > > And thanks list, for the previous tips: they were very > useful. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
