Create a Toposurface by Placing Points

Create a toposurface by placing points in the drawing area.

Video: Create a Toposurface by Defining Points

1. Open a 3D view or a site plan view.
2. Click Massing & Site tabModel Site panel (Toposurface).

By default, the Place Point tool on the ribbon is active.

3. On the Options Bar, set a value for Elevation.

   The points and their elevations are used to create the surface.

4. Next to the Elevation text box, select one of the following:
   • Absolute Elevation. Points display at the specified elevation (from the Project Base Point). You can place points anywhere in the active drawing area.
   • Relative to Surface. Allows you to edit an existing toposurface by placing points on it at the elevation you specify. To use this option effectively, you may want to work in a shaded 3D view.
5. Click in the drawing area to place points. If needed, change the elevation on the Options Bar as you place additional points.
6. Click (Finish Surface).

Note: To improve system performance related to surfaces with a large number of points, simplify the surface.