🚀 go-pugleaf

In article <2B0AE463.3E20@deneva.sdd.trw.com> thomsen@spf.trw.com (Mark Thomsen) writes:
><NOVAK@MAINE.MAINE.EDU> writes
>> I would be happy to receive comments about the best LANDSAT bands
>> and their RBG assignments for geologic interpretation of LANDSAT
>> images.
>
>	Band	Channel
>	 2	 blue
>	 4	 green
>	 5	 red
>
>For Landsat TM. You may wish up band 2 by 10% (or knock down the others by  
>10%). Works well for me (most vegetation is green; most dirt is brown, red, and  
>gray; water is pretty blue).
>
>Mark R. Thomsen

We have found that the 4,5,7 (rgb) combination works well in humid/wet
regions.  For some of the work we are doing here in the dryer southwest
we use a 7,4,2 (rgb).  Band 7 coincides with an absorption band caused
by hydroxyl ions in minerals, thus useful for geologist looking at rocks.
 
We also find useful ratios of bands 5 and 7 for the mapping hydrothermally 
altered rocks (Sabins 1987).

I would like to here from others using Landsat or other remote sensing/image
processing applications for geological studies!


===================
Robert Zimdar
Systems Coordinator              voice: (619) 594 2557
SDSU Geological Sciences           FAX: (619) 594 4372
Scientific Visualization Lab     email: rzimdar@geology.sdsu.edu