PostGIS

ST_Orientation
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ST_Orientation

8.20. SFCGAL Functions

Name

ST_Orientation — Determine surface orientation

+integer +ST_Orientation(+`geometry `+geom`)`;

The function only applies to polygons. It returns -1 if the polygon is counterclockwise oriented and 1 if the polygon is clockwise oriented.

Availability: 2.1.0

check This method needs SFCGAL backend.

check This function supports 3d and will not drop the z-index.

ST_OptimalAlphaShape

ST_StraightSkeleton