HI Markus, all, I installed Grass 8.0.0 and tried the pansharpening step. ALthough there are no errors, the resulting pansharpened rasters all have zero values.
I basically followed the steps here https://courses.neteler.org/processing-landsat8-data-in-grass-gis-7/#Unpacking_the_downloaded_Landsat_8_dataset and here: https://courses.neteler.org/processing-landsat-8-data-in-grass-gis-7-rgb-composites-and-pan-sharpening/ Essentially, after downloading the Landsat 8 OLI scene: 1. Copy blue, green and red channels rasters so that the GRASS module for converting to reflectance can work 2. Convert DN to reflectance 3. i.enhance.colors 4. pansharpen with Landsat band 8 This last step is where I haven't yet succeeded. Note that i did not convert the DN to reflectance for band 8. Could that be the problem? Note also that i was using older Grass versions for step 2 and 3. This is the Grass version i'm trying now: --- g.version -reg version=8.0.0 date=2022 revision=65675c832 build_date=2022-02-09 build_platform=x86_64-w64-mingw32 build_off_t_size=8 libgis_revision=65675c832 libgis_date=2022-01-28T08:52:15+00:00 proj=8.2.1 gdal=3.4.1 geos=3.10.2 sqlite=3.37.2 --- Thanks! Vishal On Wed, Feb 23, 2022 at 12:20 PM Vishal Mehta <[email protected]> wrote: > Thanks Markus, > I'll just do a fresh install of Grass 8 and try it out, > Best, > Vishal > > On Wed, Feb 23, 2022 at 12:14 PM Markus Neteler <[email protected]> wrote: > >> Hi Vishal, >> >> On Wed, Feb 23, 2022 at 9:04 PM Vishal Mehta <[email protected]> >> wrote: >> > >> > Thanks Markus, >> > >> > It's 7.8.2 >> > g.version -rge >> > version=7.8.2 >> > date=2019 >> >> .. your installation is a few years old - please consider updating to >> 7.8.6 or even 8.0.x. >> >> > I did see your email recently about 7.8.7.. >> > I could just try version 8? >> >> Sure, that would be best. >> >> BTW: For the QGIS integration of GRASS GIS 8.0: >> QGIS has been updated in master (QGIS 3.24) and everything backported >> to QGIS 3.22 LTR. >> >> Cheers, >> Markus >> > > > -- > Vishal K. Mehta, PhD > Sr. Scientist > Stockholm Environment Institute - US > 133 D St Suite F > Davis CA 95616 > www.sei-us.org > -- Vishal K. Mehta, PhD Sr. Scientist Stockholm Environment Institute - US 133 D St Suite F Davis CA 95616 www.sei-us.org
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