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MySQL 5.6 Reference Manual
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11.4.2.6 Surface Class

A Surface is a two-dimensional geometry. It is a noninstantiable class. Its only instantiable subclass is Polygon.

Surface Properties

  • A Surface is defined as a two-dimensional geometry.

  • The OpenGIS specification defines a simple Surface as 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 Surface is the set of closed curves corresponding to its exterior and interior boundaries.