[GRASS-user] NULL values as output of i.atcorr

[Ilaria Ferrando]

Dear Māris,
Thank you for your reply.
Yes, the image is inside the computational region.
Any other ideas?

Il mer 26 gen 2022, 19:45 Maris Nartiss <maris.gis at gmail.com> ha scritto:

> One thing to always check – does your computational region contain
> data you are analysing? Try to run `g.region rast=immagine` before
> running i.atcorr.
>
> Māris.
>
> trešd., 2022. g. 26. janv., plkst. 18:13 — lietotājs
> <ilaria.ferrando87 at gmail.com> rakstīja:
> >
> > Dear all,
> >
> > I am having troubles in processing a Sentinel-2 image with i.atcorr.
> >
> > The command I use is the following:
> >
> > i.atcorr -r -input=immagine at mapset range=0,10000
> parameters=C:\...\22giugno2020_b4.txt output=immagine_atcorr rescale=0,1
> >
> > and I obtain this output:
> >
> > wavelength less than 0.25 micron:
> >
> > let's take s(l)=s(0.25)
> >
> > Atmospheric correction...
> >
> > Atmospheric correction complete.
> >
> >
> >
> > The map I obtain is constituted by pixels with 6.669033e-34 values.
> >
> > Can anyone explain the meaning of the output and why I obtain a NULL
> value corrected map?
> >
> > Thank you for your support.
> >
> >
> >
> > _______________________________________________
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> > grass-user at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/grass-user
>
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