Dear all sorry for the newbie question. I did some experiments with gdal but I was unable gettint to the target.
I have a DTM in ASCII GRID, I produced an hillshade relief with gdaldem program and saved the ouput in a tiff file. What I would like to do now is to merge this tiff with an other tiff containing the DTM with a color ramp rendering. The merge should be done setting the opacity of one of the two tiff file to avoid complete overriding. I wonder if this could be done creating a vrt dataset of the two files and editing the vrt file. Any hints? thanks for your hints stefano iacovella
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