Hi Carlos, Did you try with rescale=0,1? Or 0,10000 and then divide the result by 10000?
Vero El mar, 31 ago 2021 a las 16:43, Carlos Henrique Grohmann de Carvalho (< carlos.grohm...@gmail.com>) escribió: > Hello all > > I'm preparing a tutorial on remote sensing with GRASS (already have 7 > videos - in portuguese - here: https://www.youtube.com/c/SPAMLabUSP) > > What I'm planning now is to run i.landsat.toar and i.atcorr, and then > compare the results with the surface reflectance products from Landsat > collection 2. > > I got it all running but the results are a bit different and it seems that > the "range" and "rescale" options are the ones to tweak. > > checking the metadata: > > L2 before scale factor: {'min': '3783', 'max': '65535'} > L2 after scale factor: {'min': '-0.0959675', 'max': '1.6022125'} > > L1 radiance at sensor: {'min': '-6.2', 'max': '191.6'} > > L1 reflectance dos1: {'min': '0', 'max': '0.398754597845553'} > > L1 reflectance 6S: {'min': '8.560894e-11', 'max': '255'} > > I can use the min/max from radiance-at-sensor as the "range" in i.atcorr, > but what would be best for the "rescale" option? If I don't set it, I end > up with 0-255 > values. How to get the floating-point result? > > thank you for any input > > > Carlos > > > -- > Prof. Carlos Henrique Grohmann > Institute of Energy and Environment - Univ. of São Paulo, Brazil > - Digital Terrain Analysis | GIS | Remote Sensing - > > http://carlosgrohmann.com > http://orcid.org/0000-0001-5073-5572 > ________________ > Can’t stop the signal. > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-user >
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