Meeting Proposed Terrain with Existing Terrain at Proposed Boundary

The boundary is a 3D line in the 3D model. I personally did not draw in this boundary, but to my knowledge it was merely drawn in as simple linework. The boundary is not dependent on proposed design features. Currently, the entire boundary is set to one uniform elevation.

I believe this is the problem. We need to create a feature from this boundary, but I am not sure that 3D elements in the 3D model can be features.

Can you go to the 2D model and create a horizontal feature? I believe the best way might be to use the "Single Offset Entire Element" tool, using an offset of 0. Once you have that horizontal feature in your 2D model, you should be able to assign a profile from your existing surface. After you have done that, I believe you can add it to your terrain.

There may be other ways to accomplish this. There could also be other steps you need to take to adjust your modeling to best represent what you really need.

This worked! I did the following:

• Created a separate 2D file
• Referenced in the boundary linework and created a 2D copy using the element offset of zero
• Dropped the shape and "re-formed" it as a line string
• Referenced in the existing terrain and assigned the line string profile from the terrain
• Referenced this 2D file back into the main proposed surface file
• Added the new boundary to the proposed surface

Thanks for all of your help!