v.drape Converts vector map to 3D by sampling of elevation raster map. Vector (v.*) ParameterVector|input|Iput vector layer|-1|False ParameterRaster|elevation|Elevation raster map for height extraction|False ParameterSelection|method|Sampling method|nearest;bilinear;cubic ParameterString|scale|Scale factor for sampled raster values|1.0 ParameterString|where|WHERE conditions of SQL statement without 'where' keyword| ParameterString|null_value|Vector Z value for unknown height| OutputVector|output|3D vector