Accessing and manipulating spatial data

This section describes the types, methods, and constructors you can use to access, manipulate, and analyze spatial data. The spatial data types can be considered like data types or classes. Each spatial data type has associated methods and constructors you use to access the data.

• ST_CircularString type
  The ST_CircularString type is a subtype of ST_Curve that uses circular line segments between control points.
• ST_CompoundCurve type
  A compound curve is a sequence of ST_Curve values such that adjacent curves are joined at their endpoints. The contributing curves are limited to ST_LineString and ST_CircularString. The start point of each curve after the first is coincident with the end point of the previous curve.
• ST_Curve type
  The ST_Curve type is a supertype for types representing lines using a sequence of points.
• ST_CurvePolygon type
  An ST_CurvePolygon represents a planar surface defined by one exterior ring and zero or more interior rings
• ST_GeomCollection type
  An ST_GeomCollection is a collection of zero or more ST_Geometry values.
• ST_Geometry type
  The ST_Geometry type is the maximal supertype of the geometry type hierarchy.
• ST_LineString type
  The ST_LineString type is a subtype of ST_Curve that uses straight line segments between control points.
• ST_MultiCurve type
  An ST_MultiCurve is a collection of zero or more ST_Curve values, and all of the curves are within the spatial reference system.
• ST_MultiLineString type
  An ST_MultiLineString is a collection of zero or more ST_LineString values, and all of the linestrings are within the spatial reference system.
• ST_MultiPoint type
  An ST_MultiPoint is a collection of zero or more ST_Point values, and all of the points are within the spatial reference system.
• ST_MultiPolygon type
  An ST_MultiPolygon is a collection of zero or more ST_Polygon values, and all of the polygons are within the spatial reference system.
• ST_MultiSurface type
  An ST_MultiSurface is a collection of zero or more ST_Surface values, and all of the surfaces are within the spatial reference system.
• ST_Point type
  The ST_Point type is a 0-dimensional geometry and represents a single location.
• ST_Polygon type
  An ST_Polygon is an ST_CurvePolygon that is formed with interior and exterior rings that are linear rings.
• ST_SpatialRefSys type
  The ST_SpatialRefSys type defines routines for working with spatial reference systems.
• ST_Surface type
  The ST_Surface type is a supertype for 2-dimensional geometry types. The ST_Surface type is not instantiable.