We have used the horizontal and vertical geometry tools to create terrain models for site design of rest areas. We have found this to be very inefficient and time consuming. For example, the rest areas typically have sidewalks that vary in width, along with curved edges and islands. The horizontal geometry tools work ok, but the vertical design is very challenging. To edit the vertical geometry, the designer needs to open a profile view and edit each segment individually. Profile intersection points and snap rules are useful in some situations, but the problem is that edits can only be made from the direction that the elements were originally placed. Ideally, we would be able to edit any vertex elevation in plan view and the segments that intersect at the vertex would inherit the updated elevation.