Surfaces are planar faces that form part of the larger 3D model. As a plane is defined by three x,y,z points, it is typical to have surfaces that are made up of three or four x,y points; however, surfaces with more than four points are possible, so long as the remaining z-values are automatically calculated. The surfaces can be horizontal, inclined, or vertical. Surfaces can be used, for example, to model the authorized depth of the template and the allowances above and below the template depth, or to model infrastructure that is being maintained.
See New Surface Features for information on creating surfaces.