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