[GRASS-user] i.atcorr output

Pham Thy maithy.osgeo at gmail.com
Thu Sep 9 08:51:27 EDT 2010

Daniel Victoria wrote:
> Hi all,
> This is problably a dumb question but, as someone posted the other day
> "The only stupid question is the one not asked", here goes.
> I'm using i.atcorr to correct landsat tm5 images and from the manual I
> saw that the output is in reflectance. But it's scaled from 0 to 255.
> The question is: The 255 value means a reflectance of 1? Or is 100 the
> reflectance of 1?
> Thanks
> Daniel
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I also have the same question about the scale. Why the output value from 
0-255 not 0-1? I checked my data, it is not true that value of 255 is 
reflectance of 1. Please anybody help us how to get the true reflectance 
value or how to convert?

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