[GRASS-user] inconsistency between i.atcorr manual and wiki

GRASS GRASS user
1

Hi all,

Reading on the Atmospheric Correction Wiki [1] and the i.atcorr man
page [2] I noticed some inconsistencies. In the manual, the exemple
uses the lsat7_2002_40 image from the NC dataset directlly but, on the
wiki tutorial, the image is first converted to TOA radiance and then
intput into i.atcorr. Seeing that i.atcorr scales the input image to 0
- 255 (iscl parameter), is it necessary to convert the images to TOA
radiance? Should I follow the i.atcorr manual exemple or the wiki
exemple?

Thanks
Daniel

[1] - http://grass.osgeo.org/wiki/Atmospheric_correction
[2] - http://grass.itc.it/gdp/html_grass64/i.atcorr.html

2

On Fri, Jul 30, 2010 at 7:20 PM, Daniel Victoria
<daniel.victoria@gmail.com> wrote:

Hi all,

Reading on the Atmospheric Correction Wiki [1] and the i.atcorr man
page [2] I noticed some inconsistencies. In the manual, the exemple
uses the lsat7_2002_40 image from the NC dataset directlly but, on the
wiki tutorial, the image is first converted to TOA radiance and then
intput into i.atcorr. Seeing that i.atcorr scales the input image to 0
- 255 (iscl parameter), is it necessary to convert the images to TOA
radiance? Should I follow the i.atcorr manual exemple or the wiki
exemple?

Yes.

I have made significant updates in the manual page today (all GRASS
versions). Also the Wiki page received a fix for the overpass time.

Markus

Thanks
Daniel

[1] - http://grass.osgeo.org/wiki/Atmospheric_correction
[2] - http://grass.itc.it/gdp/html_grass64/i.atcorr.html
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