surface (planar) properties

Note: This topic describes just the more important, confusing, or complex properties.


Planar surface
Surface
Elevation/slope type	Constant elevation (level surface design) - Single plane with a constant elevation and no slope. Defines a level surface at the specified elevation. Point and direction (sloping surface design) - Two intersecting planes with constant cross slopes projecting outward from either side of a line that is formed from a specified point, elevation, and direction. Outward projecting planes are then defined on both sides of this line by their respective cross slopes. Note that the two cross slopes can be designated so as to create a single plane. Two point (sloping surface design) - Two intersecting planes with constant cross slopes projecting outward from either side of a line that is formed between two specified points (shown below). Outward projecting planes are then defined on both sides of this line by their respective cross slopes. Once again, the two cross slopes can be designated so as to create a single plane.
Face displacement	See surface (generalized and composite) properties for this and other common surface properties.