ST_Dimension — The inherent dimension of this Geometry object, which must be less than or equal to the coordinate dimension.
integer ST_Dimension(
geometry g)
;
The inherent dimension of this Geometry object, which must
be less than or equal to the coordinate dimension. OGC SPEC
s2.1.1.1 - returns 0 for POINT
, 1 for LINESTRING
, 2 for POLYGON
, and
the largest dimension of the components of a
GEOMETRYCOLLECTION
.
This method implements the SQL/MM specification: SQL-MM 3: 5.1.2