To Add Boundaries to a Surface

Note: If you are planning to use a surface (for example, "Corridor-Top") as the boundary for another surface (for example, "EG"), it is recommended that you create a copy of EG using the Paste Surface command before adding Corridor-Top as a boundary. To do this, create a new surface (for example, "EG-Copy") and then paste EG into EG-Copy using the Paste Surface command to create the copy. Then add the Corridor-Top surface to EG-Copy as a hide boundary.

1. In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click , and click Add.
2. In the Add Boundaries dialog box, enter the boundary name in the Name field.
3. Select the boundary type from the Type list. See About Surface Boundaries.
4. Optionally, select Non-destructive breakline to specify that the boundary uses non-destructive breaklines.
   Note: This option is unavailable for grid surfaces or when Data Clip is selected as a boundary type.

   For a hide boundary, a surface may be selected as the boundary for another surface when the option to use non-destructive breaklines is also selected.

5. Optionally, if the polygon from which you are creating a boundary has curves, either enter a value in the Mid-Ordinate Distance field or click to specify a distance in the drawing area.
6. Click OK.
7. Do one of the following:
   • Select one of the following to define the boundary:
     • An existing polyline
     • An existing polygon, such as a circle object
     • An existing parcel
   • If you are defining a hide boundary and the option to use non-destructive breaklines was selected, you can enter S for Surface and select an existing surface in the drawing.

8. The boundary is created and added to the surface Boundaries collection in the Prospector tree.