Returns the minimum-area rotated rectangle that encloses a geometry object.
Unlike ST_Envelope, which produces an axis-aligned bounding box, ST_OrientedEnvelope rotates the rectangle to find the tightest fit for the input geometry.
Syntax
geometry ST_OrientedEnvelope(geometry geom);Parameters
| Parameter | Description |
|---|---|
geom | The geometry object to compute the oriented envelope for. |
Usage notes
The minimum-area rotated rectangle is not always unique. If multiple rectangles with equal minimum area exist, the function returns one of them.
For degenerate input — such as a single point or a set of collinear points — the function may return a Point or LineString instead of a Polygon.
Examples
Polygon input
The following query returns the oriented envelope of a Polygon and compares it with the original geometry:
SELECT ST_OrientedEnvelope(g), g
FROM (
SELECT 'POLYGON((0 0,1 0,1 1,0 1,0 0),(3 3,4 3,4 4,3 4,3 3))'::geometry AS g
) AS t;
See also
| Function | Description |
|---|---|
ST_Envelope | Returns an axis-aligned bounding box. Use this when the rectangle must be aligned to the coordinate axes. |
ST_MinimumBoundingCircle | Returns the smallest circle that encloses the geometry. Use this when a circular boundary is needed. |
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