[GRASSLIST:6882] beginner's question

[Rahul Chopra]

Hello all,

Am new to the mailing list and have a couple of novice like questions.

1. I have downloaded several Landsat ETM+ files which I wish to import into 
my GRASS location using r.in.gdal. Could someone provide some help with what 
the script might have to look like in order to import multiple tif files 
into this location?

2. In order to apply radiometric corrections I ran grep BIAS dataset.met and 
get the message CORRECTION_METHOD_BIAS = "IC.  Does that mean that the 
radiometric corrections have already been applied? In the metadata file from 
GLCF's website it does say END_GROUP = CORRECTIONS_APPLIED

3. When I  patch, say band 4 of  2 scenes I find a distinct difference in 
the intensity/brightness of the 2 scenes.  The sun elevation and sun azimuth 
are different in these 2 scenes? Is that the reason for difference in 
brightness? If so, how does one change the sun elevation and azimuth for one 
scene?

4. One final question-- is there a program which accurately converts 
latitude longitude into UTM coordinates?

I would appreciate it if anyone could take the time to answer these queries.

Thanks
Rahul