Function Argument Data Types

Function	Data Type of Argument
Area	Polygon, MultiPolygon
Boundary	All
Buffer	All
Centroid	All
Contains	All
ConvextHull	All
Crosses	Linestring, Polygon, MultiLine, MultiPolygon
Difference	Polygon, MultiPolygon
Dimension	All
Disjoint	All
Distance	All
Envelope	All
Endpoint	Linestring, MultiLinestring
Equals	All
ExteriorRing	Polygon
GeometryN	GeometryCollection
GeometryType	All
Inside	All
InteriorRingN	Polygon
Intersection	All
Intersects	All
IsClosed	Linestring
IsEmpty	All
IsRing	Linestring
IsSimple	All
Length	Linestring, MultiLinestring
NumGeometries	GeometryCollection
NumInteriorRing	Polygon
NumPoints	Linestring, MultiLinestring
Overlaps	All
Perimeter	Polygon, MultiPolygon
PointN	Linestring, MultiLinestring
PointOnSurface	All
Relate	All
SRID	All
StartPoint	Linestring, MultiLinestring
SymDifference	All
Touches	All
Transform	All
Union	All
Within	All
X	Point
Y	Point