The user can modify the geometry information using the Spline Surface Geometry property page.
Figure 1 Spline Surface property page
•Patch Data: Specifies the patch data for Road. This function is activated in Ground Mode. To see more information, click here.
•Modification Of Spline Surface Data: Shows the curve data and point data that make up the surface geometry. And then the user can modify the spline surface data. Please note that any changes are applied only to the surface data, not to the original curve data.
Figure 2 Modify Surface Data dialog box