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I have a DEM which I like to update with a line feature to get some kind of line extrusion. Every cell of the dem overlapped by the line feature should have for example +10 added to it's raster value. Which tool could I use here in QGIS?

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You can use r.carve within QGIS and set up a negative stream depth to increase the height of your DEM along your line feature

(In the image below a positive stream depth have been applied to the DTM)

enter image description here

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  • Exactly what I was looking for. Wonderful.
    – Fischkopf
    May 17 at 8:32

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