Reclassify your Layer 1 to be anything greater than 1 = 0 everything else equals 1. This will give you a binary 1 and 0 raster (Layer 3) that you can use in the raster calculator: Layer 2 * Layer 3. Anywhere where layer 3 is 1 your layer 2 values will stay the same and anywhere where layer 3 is 0 your layer 2 values will become 0.
On Thu, Feb 17, 2022 at 3:19 PM Bernd Vogelgesang <bernd.vogelges...@gmx.de> wrote: > Hi folk, > > I hardly never work with raster calculations, and unfortunately there is > nowhere a collection of syntax examples for different use cases to be found > (documentation :( ). > > Anything apart from +-*/ is beyond my scope. > > So, > > I made a viewshed analysis over a digital surface model (try the awesome > Visibility Analysis plugin form Zoran Čučković and buy him a beer!) > > A lot of "views" are caught by tree canopy, but I am only interest in the > flat grounds. > > So I substracted the surface model layer from the ground model layer, and > this is Layer 1. > > Giving a threshold of 1 meters difference for inaccuracities, all pixels > in this layer above 1 should result in 0 (zero) in my viewshed raster > (Layer 2) > > Please give me some hints, > > Cheers, > > Bernd > > > <cont...@zoran-cuckovic.from.hr> > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >
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