|Functions / Geometry Functions (return a geometry)|
Returns a MultiPolygon geometry object which represents a convex hull around the set of points contained in the input geometry.
MI_ConvexHull ( geometry )
geometry is an expression which returns a geometry.
Returns a ConvexHull geometry object which represents the minimum contained geometry around Canada.
select MI_ConvexHull([Geometry_Column]) from countries where country = 'Canada'