[GRASSLIST:2799] Re: image correction tools
neteler at itc.it
Tue Mar 2 04:17:28 EST 2004
On Mon, Mar 01, 2004 at 11:49:12AM +0100, werchowyna at pf.pl wrote:
> hello Everyone!
> this my first post to GRASSLIST
> since it's not strictly GRASSy you may answer directly to me
> werchowyna at pf.pl
> I'm looking for a Grass module/standalone software (both Linux and Windos)
> for radiometric (solar, atmospheric, topographic) correction of aerial and
> satellite images of subalpine and alpine areas
> open source/freeware/cheap preferably
> can someone help?
> any ideas where to ask?
There is an implementation of "6S" in GRASS:
-> i.atcorr: 6S atmospheric correction program (Christo Zietsman, South Africa)
Concerning terrain correction we are suggesting a simple method
with r.mapcalc etc in our book (http://mpa.itc.it/grassbook/).
Basically it is using the terrain geometry (slope, aspect), sun position
and the calculation of a normalized map. The upcoming second edition of
the book will describe a slightly improved method. It's not very
An older version is here (my MSc thesis, 1999):
(click onto the right buttons to proceed).
You should be sure to have an elevation model with a resolution
which corresponds to the resolution of the aerial or satellite image.
Markus Neteler <neteler itc it> http://mpa.itc.it
ITC-irst - Centro per la Ricerca Scientifica e Tecnologica
MPBA - Predictive Models for Biol. & Environ. Data Analysis
Via Sommarive, 18 - 38050 Povo (Trento), Italy
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