boundary
Calculates the boundary of the given geometry. For Point - returns an empty geometry. Points have no boundary. For Multipoint - returns an empty geometry. Points have no boundary. For Polyline - returns a multipoint containing the end points of the polyline's parts. For Polygon - returns a polyline describing its outer and inner rings.
Supports true curves.
Return
The boundary of the given geometry, or null if an error occurs.
Since
200.1.0
Parameters
geometry
A geometry object.