ST_Envelope method

geometry-expression.ST_Envelope()

ST_Polygon Returns a polygon that is the bounding rectangle for the geometry-expression.
The spatial reference system identifier of the result is the same as the spatial reference system of the geometry-expression.

The ST_Envelope method constructs a polygon that is an axis-aligned bounding rectangle for the geometry-expression. The envelope covers the entire geometry, and it can be used as a simple approximation for the geometry.

Note

If the geometry-expression is an empty geometry (ST_IsEmpty()=1), then this method returns NULL.

Note

This method can not be used with geometries in round-Earth spatial reference system.

ST_EnvelopeAggr method for type ST_Geometry

SQL/MM (ISO/IEC 13249-3: 2006) 5.1.15

The following example returns the result Polygon ((0 0, 1 0, 1 4, 0 4, 0 0)).

SELECT Shape.ST_Envelope()
FROM SpatialShapes WHERE ShapeID = 6

ST_Envelope method

Syntax

Returns

Remarks

Note

Note

See also

Standards and compatibility

Example