ST_IsLineStringCCW

Introduction: Returns true if the input is a LineString whose coordinate sequence has counter-clockwise ring orientation. Open LineStrings are evaluated as supplied, without appending the start coordinate. Non-LineString geometries and LineStrings with fewer than four points return false.

Format: ST_IsLineStringCCW(geom: Geometry)

Return type: Boolean

Since: v1.9.1

SQL Example:

SELECT ST_IsLineStringCCW(
    ST_GeomFromWKT('LINESTRING (0 0, 1 0, 1 1, 0 1, 0 0)')
)

Output:

true