1 // Boost.Geometry - gis-projections (based on PROJ4)
3 // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
5 // This file was modified by Oracle on 2017, 2018, 2019.
6 // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
7 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
9 // Use, modification and distribution is subject to the Boost Software License,
10 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
11 // http://www.boost.org/LICENSE_1_0.txt)
13 // This file is converted from PROJ4, http://trac.osgeo.org/proj
14 // PROJ4 is originally written by Gerald Evenden (then of the USGS)
15 // PROJ4 is maintained by Frank Warmerdam
16 // PROJ4 is converted to Boost.Geometry by Barend Gehrels
18 // Last updated version of proj: 5.0.0
20 // Original copyright notice:
22 // Permission is hereby granted, free of charge, to any person obtaining a
23 // copy of this software and associated documentation files (the "Software"),
24 // to deal in the Software without restriction, including without limitation
25 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
26 // and/or sell copies of the Software, and to permit persons to whom the
27 // Software is furnished to do so, subject to the following conditions:
29 // The above copyright notice and this permission notice shall be included
30 // in all copies or substantial portions of the Software.
32 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
33 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
34 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
35 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
36 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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38 // DEALINGS IN THE SOFTWARE.
40 #ifndef BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP
41 #define BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP
43 #include <boost/geometry/srs/projections/impl/base_static.hpp>
44 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
45 #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
46 #include <boost/geometry/srs/projections/impl/pj_param.hpp>
47 #include <boost/geometry/srs/projections/impl/projects.hpp>
49 namespace boost { namespace geometry
54 #ifndef DOXYGEN_NO_DETAIL
55 namespace detail { namespace wag3
63 template <typename T, typename Parameters>
64 struct base_wag3_spheroid
66 par_wag3<T> m_proj_parm;
68 // FORWARD(s_forward) spheroid
69 // Project coordinates from geographic (lon, lat) to cartesian (x, y)
70 inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
72 static const T two_thirds = detail::two_thirds<T>();
74 xy_x = this->m_proj_parm.C_x * lp_lon * cos(two_thirds * lp_lat);
78 // INVERSE(s_inverse) spheroid
79 // Project coordinates from cartesian (x, y) to geographic (lon, lat)
80 inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
82 static const T two_thirds = detail::two_thirds<T>();
85 lp_lon = xy_x / (this->m_proj_parm.C_x * cos(two_thirds * lp_lat));
88 static inline std::string get_name()
90 return "wag3_spheroid";
96 template <typename Params, typename Parameters, typename T>
97 inline void setup_wag3(Params const& params, Parameters& par, par_wag3<T>& proj_parm)
99 T const ts = pj_get_param_r<T, srs::spar::lat_ts>(params, "lat_ts", srs::dpar::lat_ts);
100 proj_parm.C_x = cos(ts) / cos(2.*ts/3.);
104 }} // namespace detail::wag3
108 \brief Wagner III projection
110 \tparam Geographic latlong point type
111 \tparam Cartesian xy point type
112 \tparam Parameters parameter type
113 \par Projection characteristics
116 \par Projection parameters
117 - lat_ts: Latitude of true scale (degrees)
119 \image html ex_wag3.gif
121 template <typename T, typename Parameters>
122 struct wag3_spheroid : public detail::wag3::base_wag3_spheroid<T, Parameters>
124 template <typename Params>
125 inline wag3_spheroid(Params const& params, Parameters & par)
127 detail::wag3::setup_wag3(params, par, this->m_proj_parm);
131 #ifndef DOXYGEN_NO_DETAIL
136 BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_wag3, wag3_spheroid)
139 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(wag3_entry, wag3_spheroid)
141 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(wag3_init)
143 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(wag3, wag3_entry)
146 } // namespace detail
149 } // namespace projections
151 }} // namespace boost::geometry
153 #endif // BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP