Trying to calculate aspect for south direction of my DEM. In this manual it is explained how to do it for nothern direction. But when I'm trying to use the expression of this type for southern:
"Aspect@1" >= 135 OR "Aspect@1" <= 225
How to change expression to get raster which will give meunderstanding of slopes facing south? I'm working in QGIS 3.10.4, CRS - Pulkovo 1942 / Gauss-Kruger zone 11.