WhiteBox is another option (there is a QGIS plugin) https://www.whiteboxgeo.com/manual/wbt_book/available_tools/geomorphometric_analysis.html#MultidirectionalHillshade
Carlos On Sat, Feb 17, 2024 at 10:44 AM Paulo van Breugel via grass-user < grass-user@lists.osgeo.org> wrote: > Hi, > > Not sure about grass gis, but have you tried the multidirectional option > when styling a raster as a hillshade in QGIS? See > https://bnhr.xyz/2019/01/22/hillshade-in-qgis.html. > > Cheers, > > Paulo > > > > > > On Fri, Feb 16, 2024 at 11:20 PM B H via grass-user < > grass-user@lists.osgeo.org> wrote: > >> Hi, >> I am trying to create a hillshading effect using DEM rasters similar to >> ESRI multidirectional hillshading, but I am unable to get anything in. >> grass to perform as good as ESRI (or even gdaldem multidirectional shading). >> I am hoping someone in this group has some scripts /addon/tips that I can >> try. >> >> So far I have tried the following on a few DEMs ( from 3m to 100 m grid >> sizes). >> 1) gdaldem multidirectional hillshading : It's not grass based, but so >> far has performed better than other grass options : with the parameter >> zfactor between 1 and 10. But it does not seem to be quite as good as ESRI. >> 2) Following code is based on some old discussion on this email list.(Its >> seems to exaggerate the hills and valleys more than I would expect) >> https://gist.github.com/amcox/b54d65f08fe4448840462901fd6350d4 >> 3) Other variants of hillshading like r.skyview : Tried with several >> parameters but it seems to be inferior to gdaldem (It seems to be a 'washed >> out' version of the multidirectional. hillshading). >> >> Thanks, >> HB >> _______________________________________________ >> grass-user mailing list >> grass-user@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/grass-user >> > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-user > -- Prof. Carlos Henrique Grohmann Institute of Energy and Environment - Univ. of São Paulo, Brazil Editor-in-Chief - Brazilian Journal of Geology http://carlosgrohmann.com https://spamlab.github.io/ http://orcid.org/0000-0001-5073-5572 ________________ Can’t stop the signal.
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