Create geometries

The following geometry creation functions are available:

Function	Description
ST_Accum	Construct an array of Geometries
ST_BoundingCircle	Return the minimum bounding circle of a Geometry
ST_Collect	Construct an array of Geometries
ST_Expand	Expand a Geometry’s envelope
ST_GeneratePoints	(MULTI)POLYGON → random points
ST_GeneratePointsInGrid	(MULTI)POLYGON → grided points
ST_MakeArcLine	Construct an LINESTRING elliptical arc
ST_MakeArcPolygon	Construct a POLYGONAL elliptical arc
ST_MakeEllipse	Construct an ellipse
ST_MakeEnvelope	Create a rectangular Polygon
ST_MakeGrid	Calculate a regular grid of POLYGONs based on a Geometry or a table
ST_MakeGridPoints	Calculate a regular grid of POINTs based on a Geometry or a table
ST_MaximumInscribedCircle	Calculate the largest circle contained within a Geometry
ST_MakeLine	(MULTI)POINT → LINESTRING
ST_MakePoint	Construct a POINT from two or three coordinates
ST_MakePolygon	LINESTRING → POLYGON
ST_MinimumDiameter	Return the minimum diameter of a Geometry
ST_MinimumRectangle	Return the minimum rectangle enclosing a Geometry
ST_OctogonalEnvelope	Return the octogonal envelope of a Geometry
ST_Point	Construct a POINT from two or three coordinates
ST_RingBuffer	Return a MULTIPOLYGON of buffers centered at a Geometry and of increasing buffer Size
ST_VariableBuffer	Return a buffer having a width increasing between 2 sizes (start & end)