exterior_ring (const version)

Function to get the exterior ring of a polygon (const version)

template<typename Polygon>
ring_return_type<Polygon const>::type exterior_ring(Polygon const & polygon)

Type	Concept	Name	Description
Polygon const &	polygon type	polygon	the polygon to get the exterior ring from

a const reference to the exterior ring

Either

#include <boost/geometry.hpp>

#include <boost/geometry/core/exterior_ring.hpp>