2. Style the background layers
First we're going to style the background layers on top of which we will later visualise the arrows of the flow direction.
1. Start QGIS
2. Add the DEM (
dem.tif), flow direction raster (
flowdir.sdat) and channels (
channels.shp) to the
Layers panel. You can drag and drop it from the browser panel or use from the main menu
Layer | Add layer | Add raster layer...
3. Deactivate the fowdir layer by unchecking the box.
4. Click
to open the
Layer Styling panel. Make sure DEM is the active layer. Choose
Singleband pseudocolor as renderer. Click on the arrow right of
Color ramp and choose
Create New Color Ramp.... Choose Catalog: cpt-city and then from
Topography select
elevation and click
OK. Then click
Classify. Under
Layer rendering Change the
Blending mode to
Multiply.
5. Click right on DEM in the Layers panel and choose Duplicate Layer.
6. Deactivate DEM by unchecking the box and activate the DEM copy layer.
7. Click right on the DEM copy layer and choose Rename Layer. Rename the layer to Hillshade.
8. In the Layer Styling panel choose Hillshade as renderer. Keep the default settings. Only change under Resampling Zoomed in to Bilinear and Zoomed out to Average. This makes the visualisation of the hillshade smoother.