projections/proj/eck5.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_ECK5_HPP
0041 #define BOOST_GEOMETRY_PROJECTIONS_ECK5_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 eck5
0055     {
0056
0057             static const double XF  = 0.44101277172455148219;
0058             static const double RXF = 2.26750802723822639137;
0059             static const double YF  = 0.88202554344910296438;
0060             static const double RYF = 1.13375401361911319568;
0061
0062             template <typename T, typename Parameters>
0063             struct base_eck5_spheroid
0064             {
0065                 // FORWARD(s_forward)  spheroid
0066                 // Project coordinates from geographic (lon, lat) to cartesian (x, y)
0067                 inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
0068                 {
0069                     xy_x = XF * (1. + cos(lp_lat)) * lp_lon;
0070                     xy_y = YF * lp_lat;
0071                 }
0072
0073                 // INVERSE(s_inverse)  spheroid
0074                 // Project coordinates from cartesian (x, y) to geographic (lon, lat)
0075                 inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
0076                 {
0077                     lp_lon = RXF * xy_x / (1. + cos( lp_lat = RYF * xy_y));
0078                 }
0079
0080                 static inline std::string get_name()
0081                 {
0082                     return "eck5_spheroid";
0083                 }
0084
0085             };
0086
0087             // Eckert V
0088             template <typename Parameters>
0089             inline void setup_eck5(Parameters& par)
0090             {
0091                 par.es = 0.0;
0092             }
0093
0094     }} // namespace detail::eck5
0095     #endif // doxygen
0096
0097     /*!
0098         \brief Eckert V projection
0099         \ingroup projections
0100         \tparam Geographic latlong point type
0101         \tparam Cartesian xy point type
0102         \tparam Parameters parameter type
0103         \par Projection characteristics
0104          - Pseudocylindrical
0105          - Spheroid
0106         \par Example
0107         \image html ex_eck5.gif
0108     */
0109     template <typename T, typename Parameters>
0110     struct eck5_spheroid : public detail::eck5::base_eck5_spheroid<T, Parameters>
0111     {
0112         template <typename Params>
0113         inline eck5_spheroid(Params const& , Parameters & par)
0114         {
0115             detail::eck5::setup_eck5(par);
0116         }
0117     };
0118
0119     #ifndef DOXYGEN_NO_DETAIL
0120     namespace detail
0121     {
0122
0123         // Static projection
0124         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_eck5, eck5_spheroid)
0125
0126         // Factory entry(s)
0127         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(eck5_entry, eck5_spheroid)
0128
0129         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(eck5_init)
0130         {
0131             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(eck5, eck5_entry);
0132         }
0133
0134     } // namespace detail
0135     #endif // doxygen
0136
0137 } // namespace projections
0138
0139 }} // namespace boost::geometry
0140
0141 #endif // BOOST_GEOMETRY_PROJECTIONS_ECK5_HPP
0142