I am trying to do a selection of points and break lines from a OG surface xml. I am wanting to draw a linestring or polyline roughly along the EP so I can create a boundary and then offset the selected info within the created boundary down by 2". I know I am able to do this with the polygon select function. One of the reasons I would like to do a boundary line is to share exactly what I selected and modified the elevation down.
I attached a snip to help clarify my question.
Thanks in advance for any help!!