This page describes the tool “Convert 2D to 3D”.
Tools > Convert 2D to 3D
2D Vector data with point, line or area objects can be converted to 3D vector data using a 3D reference.
Set the source vector file or directory via drag & drop or browse to the file location.
All vertices of the point, lines, or area objects will be separately converted to 3D vertexes.
Area objects get extruded deriving top and bottom planes from the 3D reference.
Line segments get extruded into a vertical Plane, deriving top and bottom segments from the 3D reference.
Points get extruded into a vertical Line, deriving top and bottom from the 3D Reference.
Objects that could not be converted to 3D are added to a new vector dataset <original_dataset_name+'_no3d.ovf'. Change the parameters and run the tool again to improve the results.