GeomType
Each enumerated type is compatible with a Well-known Binary (WKB) type code. 
 
Triangle is a polygon with 3 distinct, non-collinear vertices and no interior boundary. 
 
Triangle is a polygon with 3 distinct, non-collinear vertices and no interior boundary. 
 
An Envelope defines a 2D rectangular region. 
 
Triangle & operator=(const Triangle &rhs)
Assignment operator. 
 
Triangle(std::size_t nRings, GeomType t, int srid=0, Envelope *mbr=0)
It initializes the Geometry with the specified spatial reference system id and envelope. 
 
Polygon is a subclass of CurvePolygon whose rings are defined by linear rings. 
 
virtual Polygon & operator=(const Polygon &rhs)
Assignment operator.