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92f5a8d4 | 1 | // Boost.Geometry - gis-projections (based on PROJ4) |
11fdf7f2 TL |
2 | |
3 | // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | ||
92f5a8d4 TL |
5 | // This file was modified by Oracle on 2017, 2018, 2019. |
6 | // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates. | |
11fdf7f2 TL |
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 | ||
92f5a8d4 | 18 | // Last updated version of proj: 5.0.0 |
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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 | ||
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40 | #ifndef BOOST_GEOMETRY_PROJECTIONS_FAHEY_HPP |
41 | #define BOOST_GEOMETRY_PROJECTIONS_FAHEY_HPP | |
42 | ||
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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 | #include <boost/geometry/srs/projections/impl/aasincos.hpp> | |
48 | ||
49 | namespace boost { namespace geometry | |
50 | { | |
51 | ||
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52 | namespace projections |
53 | { | |
54 | #ifndef DOXYGEN_NO_DETAIL | |
55 | namespace detail { namespace fahey | |
56 | { | |
57 | ||
92f5a8d4 | 58 | static const double tolerance = 1e-6; |
11fdf7f2 | 59 | |
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60 | template <typename T, typename Parameters> |
61 | struct base_fahey_spheroid | |
11fdf7f2 | 62 | { |
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63 | // FORWARD(s_forward) spheroid |
64 | // Project coordinates from geographic (lon, lat) to cartesian (x, y) | |
92f5a8d4 | 65 | inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const |
11fdf7f2 | 66 | { |
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67 | xy_x = tan(0.5 * lp_lat); |
68 | xy_y = 1.819152 * xy_x; | |
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69 | xy_x = 0.819152 * lp_lon * asqrt(1 - xy_x * xy_x); |
70 | } | |
71 | ||
72 | // INVERSE(s_inverse) spheroid | |
73 | // Project coordinates from cartesian (x, y) to geographic (lon, lat) | |
92f5a8d4 | 74 | inline void inv(Parameters const& , T const& xy_x, T xy_y, T& lp_lon, T& lp_lat) const |
11fdf7f2 | 75 | { |
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76 | xy_y /= 1.819152; |
77 | lp_lat = 2. * atan(xy_y); | |
78 | xy_y = 1. - xy_y * xy_y; | |
79 | lp_lon = fabs(xy_y) < tolerance ? 0. : xy_x / (0.819152 * sqrt(xy_y)); | |
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80 | } |
81 | ||
82 | static inline std::string get_name() | |
83 | { | |
84 | return "fahey_spheroid"; | |
85 | } | |
86 | ||
87 | }; | |
88 | ||
89 | // Fahey | |
90 | template <typename Parameters> | |
91 | inline void setup_fahey(Parameters& par) | |
92 | { | |
93 | par.es = 0.; | |
94 | } | |
95 | ||
96 | }} // namespace detail::fahey | |
97 | #endif // doxygen | |
98 | ||
99 | /*! | |
100 | \brief Fahey projection | |
101 | \ingroup projections | |
102 | \tparam Geographic latlong point type | |
103 | \tparam Cartesian xy point type | |
104 | \tparam Parameters parameter type | |
105 | \par Projection characteristics | |
106 | - Pseudocylindrical | |
107 | - Spheroid | |
108 | \par Example | |
109 | \image html ex_fahey.gif | |
110 | */ | |
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111 | template <typename T, typename Parameters> |
112 | struct fahey_spheroid : public detail::fahey::base_fahey_spheroid<T, Parameters> | |
11fdf7f2 | 113 | { |
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114 | template <typename Params> |
115 | inline fahey_spheroid(Params const& , Parameters & par) | |
11fdf7f2 | 116 | { |
92f5a8d4 | 117 | detail::fahey::setup_fahey(par); |
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118 | } |
119 | }; | |
120 | ||
121 | #ifndef DOXYGEN_NO_DETAIL | |
122 | namespace detail | |
123 | { | |
124 | ||
125 | // Static projection | |
92f5a8d4 | 126 | BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_fahey, fahey_spheroid) |
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127 | |
128 | // Factory entry(s) | |
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129 | BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(fahey_entry, fahey_spheroid) |
130 | ||
131 | BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(fahey_init) | |
11fdf7f2 | 132 | { |
92f5a8d4 | 133 | BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(fahey, fahey_entry); |
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134 | } |
135 | ||
136 | } // namespace detail | |
137 | #endif // doxygen | |
138 | ||
139 | } // namespace projections | |
140 | ||
141 | }} // namespace boost::geometry | |
142 | ||
143 | #endif // BOOST_GEOMETRY_PROJECTIONS_FAHEY_HPP | |
144 |