Re: i.atcorr with Sentinel2
Žofie Cimburová <[email protected]>
| Newsgroups | gmane.comp.gis.grass.user |
|---|---|
| Message-ID | <CACCi8ANr5spttiTkpGBp+BFHq7mA-z+WfEW0MY5iGGiT5FrKMQ@mail.gmail.com> |
Dear Markus, thanks for your reply, this is exactly what I need to know! Best, Zofie On Fri, Dec 15, 2017 at 5:09 PM, Markus Neteler <[email protected]> wrote: > > On Dec 15, 2017 3:54 PM, "Žofie Cimburová" <[email protected]> > wrote: > > > > Dear all, > > I am trying to use i.atcorr (GRASS 7.4) to apply atmospheric corrections > for Sentinel 2 data. The documentation provides a great help, but there are > two points I am not sure about - > > > > - I don't need the atmospheric correction to be applied to the whole > scene, so I only imported a small clip of the scene to GRASS. What > longitude and latitude shall I then specify in the 6S parameters? > > I'd use the center coordinates of the clipped area. > > > Or is it necessary to apply the corrections to the entire scene? > > No since it is a pixel based algorithm. > > > - How can I estimate the value of visibility (aerosol model > concentration)? > > There are AERONET data online somewhere which might be the best choice. > > Markus > _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user