William Hudspeth wrote:
I am trying to do a multispectral reclassification with
ASTER data.
While the i.cluster and i.class modules seem to run to
completion, I cannot find the signature files to use with
i.maxlik. Does anyone know where the are written to?
Look in $MAPSET/group/$GROUP/subgroup/$SUBGROUP/sig/
The i.class help page is now updated to say that.
It is created by I_fopen_signature_file_new() found in lib/imagery/sigfile.c if you want to follow the trail.
Also, when I run i.cluster, I have tried changing many of
the parameters, but find it difficult to get a reasonable
number of classes when the convergence is set to the default
0.98. Are there any guidelines for working with i.cluster?It is probably worth noting that I am trying to run
i.cluster and i.class on the output from i.pca...
It's outside of my field, so no idea, but if you find some answers it would be nice to write up a little help section on the wiki:
http://grass.osgeo.org/wiki/Image_processing#Clustering
Currently that just says "see the GRASS book".
Hamish