1 // Boost.Geometry - gis-projections (based on PROJ4) 2 3 // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands. 4 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. 8 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) 12 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 17 18 // Last updated version of proj: 5.0.0 19 20 // Original copyright notice: 21 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: 28 29 // The above copyright notice and this permission notice shall be included 30 // in all copies or substantial portions of the Software. 31 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 37 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 38 // DEALINGS IN THE SOFTWARE. 39 40 #ifndef BOOST_GEOMETRY_PROJECTIONS_ECK1_HPP 41 #define BOOST_GEOMETRY_PROJECTIONS_ECK1_HPP 42 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/projects.hpp> 46 #include <boost/geometry/srs/projections/impl/factory_entry.hpp> 47 48 namespace boost { namespace geometry 49 { 50 51 namespace projections 52 { 53 #ifndef DOXYGEN_NO_DETAIL 54 namespace detail { namespace eck1 55 { 56 57 static const double FC = .92131773192356127802; 58 static const double RP = .31830988618379067154; 59 60 template <typename T, typename Parameters> 61 struct base_eck1_spheroid 62 { 63 // FORWARD(s_forward) spheroid 64 // Project coordinates from geographic (lon, lat) to cartesian (x, y) fwdboost::geometry::projections::detail::eck1::base_eck1_spheroid65 inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const 66 { 67 xy_x = FC * lp_lon * (1. - RP * fabs(lp_lat)); 68 xy_y = FC * lp_lat; 69 } 70 71 // INVERSE(s_inverse) spheroid 72 // Project coordinates from cartesian (x, y) to geographic (lon, lat) invboost::geometry::projections::detail::eck1::base_eck1_spheroid73 inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const 74 { 75 lp_lat = xy_y / FC; 76 lp_lon = xy_x / (FC * (1. - RP * fabs(lp_lat))); 77 } 78 get_nameboost::geometry::projections::detail::eck1::base_eck1_spheroid79 static inline std::string get_name() 80 { 81 return "eck1_spheroid"; 82 } 83 84 }; 85 86 // Eckert I 87 template <typename Parameters> setup_eck1(Parameters & par)88 inline void setup_eck1(Parameters& par) 89 { 90 par.es = 0.; 91 } 92 93 }} // namespace detail::eck1 94 #endif // doxygen 95 96 /*! 97 \brief Eckert I projection 98 \ingroup projections 99 \tparam Geographic latlong point type 100 \tparam Cartesian xy point type 101 \tparam Parameters parameter type 102 \par Projection characteristics 103 - Pseudocylindrical 104 - Spheroid 105 \par Example 106 \image html ex_eck1.gif 107 */ 108 template <typename T, typename Parameters> 109 struct eck1_spheroid : public detail::eck1::base_eck1_spheroid<T, Parameters> 110 { 111 template <typename Params> eck1_spheroidboost::geometry::projections::eck1_spheroid112 inline eck1_spheroid(Params const& , Parameters & par) 113 { 114 detail::eck1::setup_eck1(par); 115 } 116 }; 117 118 #ifndef DOXYGEN_NO_DETAIL 119 namespace detail 120 { 121 122 // Static projection BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_eck1,eck1_spheroid)123 BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_eck1, eck1_spheroid) 124 125 // Factory entry(s) 126 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(eck1_entry, eck1_spheroid) 127 128 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(eck1_init) 129 { 130 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(eck1, eck1_entry); 131 } 132 133 } // namespace detail 134 #endif // doxygen 135 136 } // namespace projections 137 138 }} // namespace boost::geometry 139 140 #endif // BOOST_GEOMETRY_PROJECTIONS_ECK1_HPP 141 142