Syntax

ST_ENVELOPE(g)
ENVELOPE(g)

Description

Returns the Minimum Bounding Rectangle (MBR) for the geometry value g. The result is returned as a Polygon value.

The polygon is defined by the corner points of the bounding box:

POLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))

ST_ENVELOPE() and ENVELOPE() are synonyms.

Examples

SELECT AsText(ST_ENVELOPE(GeomFromText('LineString(1 1,4 4)')));
+----------------------------------------------------------+
| AsText(ST_ENVELOPE(GeomFromText('LineString(1 1,4 4)'))) |
+----------------------------------------------------------+
| POLYGON((1 1,4 1,4 4,1 4,1 1))                           |
+----------------------------------------------------------+