projections/proj/wag7.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_WAG7_HPP
0041 #define BOOST_GEOMETRY_PROJECTIONS_WAG7_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/projects.hpp>
0046 #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
0047
0048 namespace boost { namespace geometry
0049 {
0050
0051 namespace projections
0052 {
0053     #ifndef DOXYGEN_NO_DETAIL
0054     namespace detail { namespace wag7
0055     {
0056
0057             template <typename T, typename Parameters>
0058             struct base_wag7_spheroid
0059             {
0060                 // FORWARD(s_forward)  sphere
0061                 // Project coordinates from geographic (lon, lat) to cartesian (x, y)
0062                 inline void fwd(Parameters const& , T lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
0063                 {
0064                     T theta, ct, D;
0065
0066                     theta = asin(xy_y = 0.90630778703664996 * sin(lp_lat));
0067                     xy_x = 2.66723 * (ct = cos(theta)) * sin(lp_lon /= 3.);
0068                     xy_y *= 1.24104 * (D = 1/(sqrt(0.5 * (1 + ct * cos(lp_lon)))));
0069                     xy_x *= D;
0070                 }
0071
0072                 static inline std::string get_name()
0073                 {
0074                     return "wag7_spheroid";
0075                 }
0076
0077             };
0078
0079             // Wagner VII
0080             template <typename Parameters>
0081             inline void setup_wag7(Parameters& par)
0082             {
0083                 par.es = 0.;
0084             }
0085
0086     }} // namespace detail::wag7
0087     #endif // doxygen
0088
0089     /*!
0090         \brief Wagner VII projection
0091         \ingroup projections
0092         \tparam Geographic latlong point type
0093         \tparam Cartesian xy point type
0094         \tparam Parameters parameter type
0095         \par Projection characteristics
0096          - Miscellaneous
0097          - Spheroid
0098          - no inverse
0099         \par Example
0100         \image html ex_wag7.gif
0101     */
0102     template <typename T, typename Parameters>
0103     struct wag7_spheroid : public detail::wag7::base_wag7_spheroid<T, Parameters>
0104     {
0105         template <typename Params>
0106         inline wag7_spheroid(Params const& , Parameters & par)
0107         {
0108             detail::wag7::setup_wag7(par);
0109         }
0110     };
0111
0112     #ifndef DOXYGEN_NO_DETAIL
0113     namespace detail
0114     {
0115
0116         // Static projection
0117         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_wag7, wag7_spheroid)
0118
0119         // Factory entry(s)
0120         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_F(wag7_entry, wag7_spheroid)
0121
0122         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(wag7_init)
0123         {
0124             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(wag7, wag7_entry)
0125         }
0126
0127     } // namespace detail
0128     #endif // doxygen
0129
0130 } // namespace projections
0131
0132 }} // namespace boost::geometry
0133
0134 #endif // BOOST_GEOMETRY_PROJECTIONS_WAG7_HPP
0135