ST_MinimumClearanceLine

Introduction: This function returns a two-point LineString geometry representing the minimum clearance distance of the input geometry. If the input geometry does not have a defined minimum clearance, such as for single Points or coincident MultiPoints, an empty LineString geometry is returned instead.

Format: ST_MinimumClearanceLine(geometry: Geometry)

Return type: Geometry

SQL Example:

SELECT ST_MinimumClearanceLine(
        ST_GeomFromWKT('POLYGON ((65 18, 62 16, 64.5 16, 62 14, 65 14, 65 18))')
)

Output:

LINESTRING (64.5 16, 65 16)