[GRASSLIST:3367] Re: [GRASS5] image analysis question - FORGOT IMPORTANT INFORMATION

[Michael Barton]

Chris,

I figured out what is going on...I think. ASTER comes in 3 resolutions: 
3 15m vnir bands, 6 30m swir bands, and 5 90m tir bands. Because GRASS 
will dynamically adjust resolution on the fly, depending on the region 
setting, I can view any combination of bands at any of these 
resolutions. However, if I want to run i.clust, all the bands I use 
need to be at the same resolution. Hence, I need to change the 
resolution using r.resample to make sure that all the bands I am 
clustering match. The reason it works without a problem with Landsat is 
that all bands (except band 8 for ETM) are the same 28.5m resolution.

Michael
______________________________
Michael Barton, Professor & Curator
School of Human Origins, Cultures, & Societies
Arizona State University
Tempe, AZ  85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton
On Apr 28, 2004, at 1:00 PM, Chris G. Nicholas wrote:

> hmmm...not sure about ASTER...but I know that things seem to work on 
> Landsat images.
>
> Chris
>
>
> -----Original Message-----
> From:	Michael Barton [mailto:michael.barton at asu.edu]
> Sent:	Tue 4/27/2004 8:41 AM
> To:	GRASS5 list
> Cc:	
> Subject:	[GRASS5] image analysis question  - FORGOT IMPORTANT 
> INFORMATION
> I got interrupted by some student questions while finishing my query
> about problems in using i.cluster, i.maxlik, and i.smap
>
> I forgot to mention that I am using GRASS 5.3 (early April build) on a
> Mac OSX 2.8 platform.
>
> Michael
> ______________________________
> Michael Barton, Professor & Curator
> Department of Anthropology
> Arizona State University
> Tempe, AZ  85287-2402
> USA
>
> voice: 480-965-6262; fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
>
>
>