convexHull function
Returns the convex hull of a geometry. It represents the minimum convex geometry that encloses all geometries within the set.
Syntax
convexHull( a, b )
Arguments
a → geometry
a → geometry
Example
geomToWKT( convexHull( geomFromWKT( 'LINESTRING(3 3 , 4 4 , 4 10)' )) ) → returns POLYGON((3 3,4 10,4 4,3 3))