Hillshade rasters are useful for determining which areas on the terrain are shaded from the sun and which are not and are calculated from a DEM (see section 188.8.131.52) for further information about the tool.
To calculate the hillshade based on a DEM:
- Go to Raster.
- Select Terrain analysis.
- Choose Hillshade.
- Select the DEM as the input raster.
- Specify an output (raster) layer.
- Choose reasonable values for the horizontal and vertical angle of the illumination (in degrees), the Z factor can usually stay at 1 (otherwise the terrain will be super-elevated when working in a CRS).
- Click OK.
- Adapt the raster symbolization if necessary (Layer Properties > Symbol, notice that the results are shown in degrees (Fig. 104)).
Fig. 104. Hillshade tool to create shaded relief rasters based on a DEM.