I want to "map" or "drape" a 2D vector (polygon) over a raster. Obtaining a 3D vector with z-values according to the raster it's draped over.
Most of my internet findings point towards v.drape. However, this tool seems to only work for polylines, not polygons. Furthermore I am looking for functionality similar to that of ArcGIS 3D-Analyst ("interpolate shape"), where points are inserted in every new raster cell with an according height. Is there a similar tool or combination of tools to achieve this?
Unfortunately, converting the polygon to polylines, draping it and converting it back to polygon does not seem to work either, as the Z-values get lost.