I have a DTM onto which I need to 'stamp' a series of raised embankments.
The DTM is a raster grid (in m above sea level) and the embankments are polylines containing the crest height (also in m.a.s.l.) of each embankment.
I want to edit the DTM cells falling under the polylines to take the elevation values from the polylines, effectively stamping these onto the dtm.
What would be the most efficient method of doing this in QGIS?
Edit: In ArcGIS I would have done this in archydro tools (using the build walls function) or by using a Con and IsNull function in calculator.