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+// Boost.Geometry
+
+// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
+
+// This file was modified by Oracle on 2014.
+// Modifications copyright (c) 2014 Oracle and/or its affiliates.
+
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// Use, modification and distribution is subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP
+#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP
+
+
+#include <boost/geometry/core/coordinate_type.hpp>
+#include <boost/geometry/core/radian_access.hpp>
+
+#include <boost/geometry/strategies/distance.hpp>
+
+#include <boost/geometry/util/promote_floating_point.hpp>
+#include <boost/geometry/util/select_calculation_type.hpp>
+
+#include <boost/geometry/algorithms/detail/vincenty_inverse.hpp>
+
+namespace boost { namespace geometry
+{
+
+namespace strategy { namespace distance
+{
+
+/*!
+\brief Distance calculation formulae on latlong coordinates, after Vincenty, 1975
+\ingroup distance
+\tparam Spheroid The reference spheroid model
+\tparam CalculationType \tparam_calculation
+\author See
+ - http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
+ - http://www.icsm.gov.au/gda/gdav2.3.pdf
+\author Adapted from various implementations to get it close to the original document
+ - http://www.movable-type.co.uk/scripts/LatLongVincenty.html
+ - http://exogen.case.edu/projects/geopy/source/geopy.distance.html
+ - http://futureboy.homeip.net/fsp/colorize.fsp?fileName=navigation.frink
+
+*/
+template
+<
+ typename Spheroid,
+ typename CalculationType = void
+>
+class vincenty
+{
+public :
+ template <typename Point1, typename Point2>
+ struct calculation_type
+ : promote_floating_point
+ <
+ typename select_calculation_type
+ <
+ Point1,
+ Point2,
+ CalculationType
+ >::type
+ >
+ {};
+
+ typedef Spheroid model_type;
+
+ inline vincenty()
+ : m_spheroid()
+ {}
+
+ explicit inline vincenty(Spheroid const& spheroid)
+ : m_spheroid(spheroid)
+ {}
+
+ template <typename Point1, typename Point2>
+ inline typename calculation_type<Point1, Point2>::type
+ apply(Point1 const& point1, Point2 const& point2) const
+ {
+ return geometry::detail::vincenty_inverse
+ <
+ typename calculation_type<Point1, Point2>::type
+ >(get_as_radian<0>(point1),
+ get_as_radian<1>(point1),
+ get_as_radian<0>(point2),
+ get_as_radian<1>(point2),
+ m_spheroid).distance();
+ }
+
+ inline Spheroid const& model() const
+ {
+ return m_spheroid;
+ }
+
+private :
+ Spheroid m_spheroid;
+};
+
+#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
+namespace services
+{
+
+template <typename Spheroid, typename CalculationType>
+struct tag<vincenty<Spheroid, CalculationType> >
+{
+ typedef strategy_tag_distance_point_point type;
+};
+
+
+template <typename Spheroid, typename CalculationType, typename P1, typename P2>
+struct return_type<vincenty<Spheroid, CalculationType>, P1, P2>
+ : vincenty<Spheroid, CalculationType>::template calculation_type<P1, P2>
+{};
+
+
+template <typename Spheroid, typename CalculationType>
+struct comparable_type<vincenty<Spheroid, CalculationType> >
+{
+ typedef vincenty<Spheroid, CalculationType> type;
+};
+
+
+template <typename Spheroid, typename CalculationType>
+struct get_comparable<vincenty<Spheroid, CalculationType> >
+{
+ static inline vincenty<Spheroid, CalculationType> apply(vincenty<Spheroid, CalculationType> const& input)
+ {
+ return input;
+ }
+};
+
+template <typename Spheroid, typename CalculationType, typename P1, typename P2>
+struct result_from_distance<vincenty<Spheroid, CalculationType>, P1, P2 >
+{
+ template <typename T>
+ static inline typename return_type<vincenty<Spheroid, CalculationType>, P1, P2>::type
+ apply(vincenty<Spheroid, CalculationType> const& , T const& value)
+ {
+ return value;
+ }
+};
+
+
+} // namespace services
+#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
+
+
+// We might add a vincenty-like strategy also for point-segment distance, but to calculate the projected point is not trivial
+
+
+
+}} // namespace strategy::distance
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP