Option

Description

Ground surface

Select the surface which contains the points/line model that define the ground or base surface.

Terrace surface

Select the surface which contains the points/line model that define the terrace surface.

Merge surface

Select this checkbox and select a surface in order to have the specified ground surface copied to the merge surface, which must be an empty surface, before the terrace merge takes place.

Only available when merging the terrace and ground surfaces.

Validate merged surface

Select this checkbox to have Validate Model performed on the resultant merged surface.

Only available when merging the terrace and ground surfaces.