[GRASS-user] Re: Problem with i.cluster

[Eliette]

Hi everyone,

I could solve this problem like this:

First: read the rows and columns of your raster map using r.info. Appropiate
sample intervals are obtained by dividing that number by 100. 
For example, if you have:
Rows: 7603   
Columns:  8556  

Good sample intervals are: 76,86

So, set up your region to match one of the raster maps that you are using
(if you defined a group it can be any of the maps in the group), for this
use g.region.

Now you should be able to run i.cluster with the sample intervals = 76,86.

Worked for me.
Here you can find more info regarding this topic, it is very helpful even if
you are ussing another version of GRASS:
http://grass.osgeo.org/gdp/imagery/grass4_image_processing.pdf

Best,
Eliette





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[GRASS-user] Re: Problem with i.cluster

[Eliette]

Dear all,

I am having this same problem. I have rows= 6911 and columns = 7951 in the
rasters that I am using for the i.cluster which I already grouped using
i.group.

I chose sampling intervals : 69 (rows) and 79 (cols) and get the same error
message. 
Does anyone knows how to solve it? 

I very much appreciate your help.

Kindly,
Eliette

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