This command draws a 2D or 3D
polyline at the intersection of two surfaces. In addition to
this choice, the dialog also allows for the specification of the
layer to draw the polylines on, whether or not to smooth them, and
whether or not to reduce vertices.
Pulldown Menu Location: Surface >> Draw Surface Keyboard Command: grdcross Prerequisite: two surface files (.GRD, .TIN, .FLT)