[GRASS-user] Using i.atcorr on SPOT4 and SPOT5 imagery

[Markus Neteler]

On Tue, Jul 3, 2012 at 9:12 PM, Cody Schank <codyschank at gmail.com> wrote:
> I am using i.atcorr on a mix of SPOT4 and SPOT5 imagery.
>
> I am having some difficulty with determining the correct inputs into the
> model.
>
> For altitude, I have a raster DEM I want to use.  Should the units be in
> meters (or kilometers and negative, as I think it should be when using 6s
> directly)?

It should be a "normal" DEM in meters.
(Just the notation of the parameters are a bit unusual perhaps).

>  Also, what value should I put in the input text file to indicate
> that I have a raster I want to use for this parameter.

Please take a look at
http://grass.osgeo.org/wiki/Atmospheric_correction

Let us know if the documentation should be improved (and how).

Markus