projections/proj/wag3.hpp

0001 // Boost.Geometry - gis-projections (based on PROJ4)
0002
0003 // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
0004
0005 // This file was modified by Oracle on 2017, 2018, 2019.
0006 // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
0007 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
0008
0009 // Use, modification and distribution is subject to the Boost Software License,
0010 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0011 // http://www.boost.org/LICENSE_1_0.txt)
0012
0013 // This file is converted from PROJ4, http://trac.osgeo.org/proj
0014 // PROJ4 is originally written by Gerald Evenden (then of the USGS)
0015 // PROJ4 is maintained by Frank Warmerdam
0016 // PROJ4 is converted to Boost.Geometry by Barend Gehrels
0017
0018 // Last updated version of proj: 5.0.0
0019
0020 // Original copyright notice:
0021
0022 // Permission is hereby granted, free of charge, to any person obtaining a
0023 // copy of this software and associated documentation files (the "Software"),
0024 // to deal in the Software without restriction, including without limitation
0025 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
0026 // and/or sell copies of the Software, and to permit persons to whom the
0027 // Software is furnished to do so, subject to the following conditions:
0028
0029 // The above copyright notice and this permission notice shall be included
0030 // in all copies or substantial portions of the Software.
0031
0032 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
0033 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0034 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
0035 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0036 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0037 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0038 // DEALINGS IN THE SOFTWARE.
0039
0040 #ifndef BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP
0041 #define BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP
0042
0043 #include <boost/geometry/srs/projections/impl/base_static.hpp>
0044 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
0045 #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
0046 #include <boost/geometry/srs/projections/impl/pj_param.hpp>
0047 #include <boost/geometry/srs/projections/impl/projects.hpp>
0048
0049 namespace boost { namespace geometry
0050 {
0051
0052 namespace projections
0053 {
0054     #ifndef DOXYGEN_NO_DETAIL
0055     namespace detail { namespace wag3
0056     {
0057             template <typename T>
0058             struct par_wag3
0059             {
0060                 T    C_x;
0061             };
0062
0063             template <typename T, typename Parameters>
0064             struct base_wag3_spheroid
0065             {
0066                 par_wag3<T> m_proj_parm;
0067
0068                 // FORWARD(s_forward)  spheroid
0069                 // Project coordinates from geographic (lon, lat) to cartesian (x, y)
0070                 inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
0071                 {
0072                     static const T two_thirds = detail::two_thirds<T>();
0073
0074                     xy_x = this->m_proj_parm.C_x * lp_lon * cos(two_thirds * lp_lat);
0075                     xy_y = lp_lat;
0076                 }
0077
0078                 // INVERSE(s_inverse)  spheroid
0079                 // Project coordinates from cartesian (x, y) to geographic (lon, lat)
0080                 inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
0081                 {
0082                     static const T two_thirds = detail::two_thirds<T>();
0083
0084                     lp_lat = xy_y;
0085                     lp_lon = xy_x / (this->m_proj_parm.C_x * cos(two_thirds * lp_lat));
0086                 }
0087
0088                 static inline std::string get_name()
0089                 {
0090                     return "wag3_spheroid";
0091                 }
0092
0093             };
0094
0095             // Wagner III
0096             template <typename Params, typename Parameters, typename T>
0097             inline void setup_wag3(Params const& params, Parameters& par, par_wag3<T>& proj_parm)
0098             {
0099                 T const ts = pj_get_param_r<T, srs::spar::lat_ts>(params, "lat_ts", srs::dpar::lat_ts);
0100                 proj_parm.C_x = cos(ts) / cos(2.*ts/3.);
0101                 par.es = 0.;
0102             }
0103
0104     }} // namespace detail::wag3
0105     #endif // doxygen
0106
0107     /*!
0108         \brief Wagner III projection
0109         \ingroup projections
0110         \tparam Geographic latlong point type
0111         \tparam Cartesian xy point type
0112         \tparam Parameters parameter type
0113         \par Projection characteristics
0114          - Pseudocylindrical
0115          - Spheroid
0116         \par Projection parameters
0117          - lat_ts: Latitude of true scale (degrees)
0118         \par Example
0119         \image html ex_wag3.gif
0120     */
0121     template <typename T, typename Parameters>
0122     struct wag3_spheroid : public detail::wag3::base_wag3_spheroid<T, Parameters>
0123     {
0124         template <typename Params>
0125         inline wag3_spheroid(Params const& params, Parameters & par)
0126         {
0127             detail::wag3::setup_wag3(params, par, this->m_proj_parm);
0128         }
0129     };
0130
0131     #ifndef DOXYGEN_NO_DETAIL
0132     namespace detail
0133     {
0134
0135         // Static projection
0136         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_wag3, wag3_spheroid)
0137
0138         // Factory entry(s)
0139         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(wag3_entry, wag3_spheroid)
0140
0141         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(wag3_init)
0142         {
0143             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(wag3, wag3_entry)
0144         }
0145
0146     } // namespace detail
0147     #endif // doxygen
0148
0149 } // namespace projections
0150
0151 }} // namespace boost::geometry
0152
0153 #endif // BOOST_GEOMETRY_PROJECTIONS_WAG3_HPP
0154