# MI_ConvexHull

## Description

Returns a MultiPolygon geometry object which represents a convex hull around the set of points contained in the input geometry.

## Syntax

MI_ConvexHull ( geometry )

## Arguments

`geometry` is an expression which returns a geometry.

## Example

Returns a ConvexHull geometry object which represents the minimum contained geometry around Canada.

`select MI_ConvexHull([Geometry_Column]) from countries where country = 'Canada'`