[GRASS-user] how to create multiband/hyperspectral

[Robert Kuszinger]

Michael,

thanks, that's really what I've found and thenks for your answer making 
it clear that there are no other tools for this.

My actual problem is to have e.g. 14 bands for a single area. I'm 
planning to play with displaying compisosite variations withount 
createing r.composite or r.rgb files for all possible combinations BUT - 
reading you answer finally I found what I need:

d.rgb :)

I could easily drop in rasters (eg. bands) and play with my combinations.


thanks!

Robert



> Robert,
>
> It isn't clear what you want to do. If you want to patch together adjacent
> images (i.e., rasters covering different geographic areas), use r.patch.
>
> If you want to make a color image out of 3 bands, use d.rgb to just display
> a color image, or r.composite to combine 3 bands into a new color image
> file.
>
> GRASS stores all individual 'bands' as separate rasters that you can
> combine, analyze, and process in multiple ways. It does not combine multiple
> bands into a single 'file'.
>
> Some processes can deal with a group of images/bands covering the same
> geographic area as a 'group'. A group is created with i.group. But a 'group'
> is simply a reference to a set of images; it does not combine them into a
> single multi-band file. This is unnecessary with GRASS.
>
> Michael
> __________________________________________
> Michael Barton, Professor of Anthropology
> School of Human Evolution & Social Change
> Center for Social Dynamics & Complexity
> Arizona State University
>
> phone: 480-965-6213
> fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
>
>
>
>   
>> From: Robert Kuszinger <kuszinger at giscom.hu>
>> Date: Tue, 11 Jul 2006 06:59:59 +0200
>> To: <grassuser at grass.itc.it>
>> Subject: [GRASS-user] how to create multiband/hyperspectral
>>
>>
>> Hello!
>>
>> I give up - cannot find the solution. :)
>>
>> I've created a python script to automatically process ASTER CD-s and
>> create all the raster layers in grass from a given CD automatically. Now
>> I have a LOT of raster layers.
>>
>> *** I would like to join raster layers covering the same area *** to
>> make only one file for one area. So, how to make a multispectral file
>> using several raster layers? I have 3-14 bands I'd like to join per image
>> How to make it?
>>
>> I checked grass documentation, commands, but simply cannot figure how to
>> make it.
>> I realized that there is an i.group command - that could be fine for
>> rasters as well...
>>
>> Maybe the answer is too simmple, that's why I can't find.
>>
>> Thanks for any help
>>
>> Robert
>>
>>
>>
>>
>>
>>
>>
>>
>>     
>
>
>   

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