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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,
true, false
>::apply(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
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