MI_AggregateBuffer

Description

Returns a MultiPolygon geometry object which represents a buffered distance around the aggregated geometry objects.

Syntax

MI_AggregateBuffer ( geometry, dist, unit, calculationType, res )

Arguments

geometry is an expression which returns a geometry,

dist is a number which represents the distance from the source geometry for the buffer,

unit is an area unit specification,

calculationType is a string that indicates whether to perform a Spherical or Cartesian calculation. There is no default, and

res is a number which specifies the minimum number of segments used in creating a circle from buffering a point.

Example

Returns a MultiPolygon geometry object which represents a buffered distance around the aggregated geometry objects.

select MI_AggregateBuffer([Geometry_Column],5,'km','Spherical',10) from countries where country in ('Canada','United States','Mexico')

Remarks

Valid values for unit are the following distance units: