ceph/src/boost/boost/geometry/strategies/geographic/distance_vincenty.hpp

   1 // Boost.Geometry
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // This file was modified by Oracle on 2014-2017.
   6 // Modifications copyright (c) 2014-2017 Oracle and/or its affiliates.
   7
   8 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   9
  10 // Use, modification and distribution is subject to the Boost Software License,
  11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12 // http://www.boost.org/LICENSE_1_0.txt)
  13
  14 #ifndef BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP
  15 #define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP
  16
  17
  18 #include <boost/geometry/strategies/geographic/distance.hpp>
  19 #include <boost/geometry/strategies/geographic/parameters.hpp>
  20
  21
  22 namespace boost { namespace geometry
  23 {
  24
  25 namespace strategy { namespace distance
  26 {
  27
  28 /*!
  29 \brief Distance calculation formulae on latlong coordinates, after Vincenty, 1975
  30 \ingroup distance
  31 \tparam Spheroid The reference spheroid model
  32 \tparam CalculationType \tparam_calculation
  33 \author See
  34     - http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
  35     - http://www.icsm.gov.au/gda/gdav2.3.pdf
  36 \author Adapted from various implementations to get it close to the original document
  37     - http://www.movable-type.co.uk/scripts/LatLongVincenty.html
  38     - http://exogen.case.edu/projects/geopy/source/geopy.distance.html
  39     - http://futureboy.homeip.net/fsp/colorize.fsp?fileName=navigation.frink
  40
  41 */
  42 template
  43 <
  44     typename Spheroid = srs::spheroid<double>,
  45     typename CalculationType = void
  46 >
  47 class vincenty
  48     : public strategy::distance::geographic
  49         <
  50             strategy::vincenty, Spheroid, CalculationType
  51         >
  52 {
  53     typedef strategy::distance::geographic
  54         <
  55             strategy::vincenty, Spheroid, CalculationType
  56         > base_type;
  57
  58 public:
  59     inline vincenty()
  60         : base_type()
  61     {}
  62
  63     explicit inline vincenty(Spheroid const& spheroid)
  64         : base_type(spheroid)
  65     {}
  66 };
  67
  68 #ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
  69 namespace services
  70 {
  71
  72 template <typename Spheroid, typename CalculationType>
  73 struct tag<vincenty<Spheroid, CalculationType> >
  74 {
  75     typedef strategy_tag_distance_point_point type;
  76 };
  77
  78
  79 template <typename Spheroid, typename CalculationType, typename P1, typename P2>
  80 struct return_type<vincenty<Spheroid, CalculationType>, P1, P2>
  81     : vincenty<Spheroid, CalculationType>::template calculation_type<P1, P2>
  82 {};
  83
  84
  85 template <typename Spheroid, typename CalculationType>
  86 struct comparable_type<vincenty<Spheroid, CalculationType> >
  87 {
  88     typedef vincenty<Spheroid, CalculationType> type;
  89 };
  90
  91
  92 template <typename Spheroid, typename CalculationType>
  93 struct get_comparable<vincenty<Spheroid, CalculationType> >
  94 {
  95     static inline vincenty<Spheroid, CalculationType> apply(vincenty<Spheroid, CalculationType> const& input)
  96     {
  97         return input;
  98     }
  99 };
 100
 101 template <typename Spheroid, typename CalculationType, typename P1, typename P2>
 102 struct result_from_distance<vincenty<Spheroid, CalculationType>, P1, P2 >
 103 {
 104     template <typename T>
 105     static inline typename return_type<vincenty<Spheroid, CalculationType>, P1, P2>::type
 106         apply(vincenty<Spheroid, CalculationType> const& , T const& value)
 107     {
 108         return value;
 109     }
 110 };
 111
 112
 113 } // namespace services
 114 #endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
 115
 116
 117 // We might add a vincenty-like strategy also for point-segment distance, but to calculate the projected point is not trivial
 118
 119
 120
 121 }} // namespace strategy::distance
 122
 123
 124 }} // namespace boost::geometry
 125
 126
 127 #endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_VINCENTY_HPP