[GRASS-user] getting desperate with error messages

[Reno Bladergroen]

Hello List,

I would like to ask your help on several subjects.
I already wrote down other questions but till now all methods suggested did
not really work and I'm wondering whether I can use grass for my
application.

What i would like to do is creating a high resolution RGB image of some
landsat images. I downloaded all images (Red, Green, Blue, NIR, MIR and
pan.). To get a real color image i started using the RGB channels. d.rgb,
gives a somewhat dark image. So I used i.landsat.rgb to enhance it's color
profile but then I get the first error:

/Applications/GRASS-6.3.app/Contents/MacOS/scripts/i.landsat.rgb: line 138:
[: -gt: unary operator expected

Do i have to re-install i.landsat.rgb??

The following thing is trying to pan-sharp the image, but pan-sharpening is
only able with the NIR/MIR/Green images which generates a funny purple/blue
image.
I was told that I could use any image for brovey sharpening, but then I get
a really blue image. I think this is logical, because the calculation used
for pan-sharpening with a different color profile image should be different
right? So the next question is, which RGB color should I use in stead of MIR
and NIR: Blue for MIR?, Red for NIR? So till now only ugly strange pictures.
The other thing is how do the pansharpening pixels integrate into the RGB
color range? White...? What should i do first?

Then one more thing: I reprojected the mentioned tiff files from XY (meters)
to LL. But... using r.proj, the resolution of all these images drop to
non-usable values for a high resolution image.

I read the imaging tutorial which is outdated. I still didn't get the book,
although I have doubts that this book can help me. Should I purchase the
book, even though I'm not sure if Grass is the appropriate application to
use? Therefore I hope to get some help from you first, to make a good
decision.

Please help?

Thanks a lot,

Reno
Belgium
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