Remove a group of surface elements that have previously been read-in via the read_surf command. The group surf or read_surf can be used to assign each surface element to one or more groups. This command removes all surface elements in the specified surfID group.
Note that the remaining surface elements must still constitute a "watertight" surface or an error will be generated. The definition of watertight is explained in the Restrictions section of the read_surf doc page.
After surface elements have been deleted, any surface points that are no longer part of a surface element are also deleted. The remaining surface points and elements are renumbered to create compressed, contiguous lists. The new list of surface elements can be output via the write_surf command.