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For (Multi)Polygon geometries, this function sets the exterior ring orientation to clockwise and interior rings to counter-clockwise orientation. Non-polygonal geometries are returned unchanged. ST_ForcePolygonCW

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Signatures

ST_ForcePolygonCW(geom: Geometry)

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Parameters

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geom
Geometry
required
The input geometry.

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Return type

The resulting geometry.

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Example

SELECT ST_AsText(ST_ForcePolygonCW(ST_GeomFromText('POLYGON ((20 35, 10 30, 10 10, 30 5, 45 20, 20 35),(30 20, 20 15, 20 25, 30 20))')))

POLYGON ((20 35, 45 20, 30 5, 10 10, 10 30, 20 35), (30 20, 20 25, 20 15, 30 20))