[GRASS-user] grass i.cluster generates only one cluster after one iteration

[Nikos Alexandris]

Bill Hudspeth:
 
> I am trying to build a signature file for a three band NAIP image (digital
> orthophotography....red, blue, green) using i.cluster. I am largely
> accepting the defaults to begin with (classes=10, iterations=30,
> convergence=98, separation=0), but have tried a separation of 0.5 and 1.0.
> In all cases I get 100% convergence with only one cluster generated. Any
> ideas on what might be going on??

Just wild guessing:

# checking resolution and extent
g.region -p

# does the group include all three channels?
i.group naip_rgb -l

Best, Nikos
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 230 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20130113/4435d52c/attachment-0001.pgp>