Set as 2D/Undefined¶
Use this dialog to convert 3D lines or 3D polygons to 2D lines or 2D polygons. You can also set the heights to undefined (-99999).
Where to Find the Dialog¶
Right-click in the horizontal list field and select Tools - Set as 2D/Undefined.
Available Methods¶
You have three options for assigning height:
- Min.
- Max.
- Mean of min. and max.
Examples

Original polygon

Max. height

Min. height