MySQL 8.4 Release Notes
A Surface is a two-dimensional geometry. It
is a noninstantiable class. Its only instantiable subclass is
Polygon.
Simple surfaces in three-dimensional space are isomorphic to planar surfaces.
Polyhedral surfaces are formed by “stitching” together simple surfaces along their boundaries, polyhedral surfaces in three-dimensional space may not be planar as a whole.
Surface
Properties
A
Surfaceis defined as a two-dimensional geometry.The OpenGIS specification defines a simple
Surfaceas a geometry that consists of a single “patch” that is associated with a single exterior boundary and zero or more interior boundaries.The boundary of a simple
Surfaceis the set of closed curves corresponding to its exterior and interior boundaries.