ST_Envelope

Calculates the minimum bounding rectangle that contains the specified GEOMETRY object.

Behavior type

Syntax

ST_Envelope( g )

Arguments

g

Spatial object for which you want to find the minimum bounding rectangle, type GEOMETRY

Returns

GEOMETRY

Supported data types

Examples

The following example shows how to use ST_Envelope.

Returns the minimum bounding rectangle:

=> SELECT ST_AsText(ST_Envelope(ST_GeomFromText('POLYGON((0 0,1 1,1 2,2 2,
   2 1,3 0,1.5 -1.5,0 0))')));
                 ST_AsText
-------------------------------------------
 POLYGON ((0 -1.5, 3 -1.5, 3 2, 0 2, 0 -1.5))
(1 row)