Trim Surface is used to define the boundary of the surface loaded in the Surface Data form to remove information that is not necessary by the design. I.e. if a large LIDAR tile has been simply loaded and it only requires a certain part of it.
Draw a polygon
The Drawing Mode tool should be selected with no polygon drawn on the surface, then the drawing cursor will appear when entering on the plan.
Edit the polygon
The Drawing Mode tool should be selected to edit the polygon.
|Move a vertex|
|Add a vertex|
|Delete a vertex|
|Drag the polygon|
|Remove the polygon|
Handle the plan
Trim the surface
After drawing the polygon, the surface is automatically trimmed by clicking OK, then the updated data is displayed in Surface Data.
The surface will not be trimmed if the polygon has crossing edges.