In this exercise, you will add surface boundary data from an existing surface boundary in the drawing.
On the command line, enter LOA to turn all of the layers in the drawing back on.
On the Terrain Model Explorer, select Boundaries, and then right-click and click Add Boundary Definition.
Select the white surface boundary polyline, and then enter Area1 for the Boundary name.
Press ENTER to accept the default boundary type, Outer.
The Outer option limits the extents of the surface to the area inside the selected surface boundary polyline.
Enter No for making breaklines along edges, and then press ENTER to end the command.
When breaklines are not made along the edge, only data inside inside of the polyline boundary is considered when creating the surface.
The surface boundary data is displayed in the right pane of the Terrain Model Explorer.