I have DEM (*.tif) from which I need to create shaded relief in GRASS/QGIS. Problem is that it appears to have some parallel stripes all across the raster, as on picture below.
I used resampling method (Warp(Reproject)) to visually increase resolution, and I filtered the raster with GRASS function r.neighbors.
Then I created shaded relief using r.relief and the stripes become more visible.
How can I remove those stripes?