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Function to get the exterior_ring ring of a polygon.
template<typename Polygon, > ring_return_type<Polygon>::type exterior_ring(Polygon & polygon)
Type |
Concept |
Name |
Description |
---|---|---|---|
P |
polygon type |
- |
Must be specified |
Polygon & |
polygon |
the polygon to get the exterior ring from |
a reference to the exterior ring
Either
#include <boost/geometry/geometry.hpp>
Or
#include <boost/geometry/core/exterior_ring.hpp>