eqc.hpp 5.5 KB

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  1. // Boost.Geometry - gis-projections (based on PROJ4)
  2. // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
  3. // This file was modified by Oracle on 2017, 2018, 2019.
  4. // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
  5. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
  6. // Use, modification and distribution is subject to the Boost Software License,
  7. // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  8. // http://www.boost.org/LICENSE_1_0.txt)
  9. // This file is converted from PROJ4, http://trac.osgeo.org/proj
  10. // PROJ4 is originally written by Gerald Evenden (then of the USGS)
  11. // PROJ4 is maintained by Frank Warmerdam
  12. // PROJ4 is converted to Boost.Geometry by Barend Gehrels
  13. // Last updated version of proj: 5.0.0
  14. // Original copyright notice:
  15. // Permission is hereby granted, free of charge, to any person obtaining a
  16. // copy of this software and associated documentation files (the "Software"),
  17. // to deal in the Software without restriction, including without limitation
  18. // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  19. // and/or sell copies of the Software, and to permit persons to whom the
  20. // Software is furnished to do so, subject to the following conditions:
  21. // The above copyright notice and this permission notice shall be included
  22. // in all copies or substantial portions of the Software.
  23. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  24. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25. // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  26. // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  27. // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  28. // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  29. // DEALINGS IN THE SOFTWARE.
  30. #ifndef BOOST_GEOMETRY_PROJECTIONS_EQC_HPP
  31. #define BOOST_GEOMETRY_PROJECTIONS_EQC_HPP
  32. #include <boost/geometry/srs/projections/impl/base_static.hpp>
  33. #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
  34. #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
  35. #include <boost/geometry/srs/projections/impl/pj_param.hpp>
  36. #include <boost/geometry/srs/projections/impl/projects.hpp>
  37. namespace boost { namespace geometry
  38. {
  39. namespace projections
  40. {
  41. #ifndef DOXYGEN_NO_DETAIL
  42. namespace detail { namespace eqc
  43. {
  44. template <typename T>
  45. struct par_eqc
  46. {
  47. T rc;
  48. };
  49. template <typename T, typename Parameters>
  50. struct base_eqc_spheroid
  51. {
  52. par_eqc<T> m_proj_parm;
  53. // FORWARD(s_forward) spheroid
  54. // Project coordinates from geographic (lon, lat) to cartesian (x, y)
  55. inline void fwd(Parameters const& par, T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
  56. {
  57. xy_x = this->m_proj_parm.rc * lp_lon;
  58. xy_y = lp_lat - par.phi0;
  59. }
  60. // INVERSE(s_inverse) spheroid
  61. // Project coordinates from cartesian (x, y) to geographic (lon, lat)
  62. inline void inv(Parameters const& par, T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
  63. {
  64. lp_lon = xy_x / this->m_proj_parm.rc;
  65. lp_lat = xy_y + par.phi0;
  66. }
  67. static inline std::string get_name()
  68. {
  69. return "eqc_spheroid";
  70. }
  71. };
  72. // Equidistant Cylindrical (Plate Caree)
  73. template <typename Params, typename Parameters, typename T>
  74. inline void setup_eqc(Params const& params, Parameters& par, par_eqc<T>& proj_parm)
  75. {
  76. proj_parm.rc = cos(pj_get_param_r<T, srs::spar::lat_ts>(params, "lat_ts", srs::dpar::lat_ts));
  77. if (proj_parm.rc <= 0.)
  78. BOOST_THROW_EXCEPTION( projection_exception(error_lat_ts_larger_than_90) );
  79. par.es = 0.;
  80. }
  81. }} // namespace detail::eqc
  82. #endif // doxygen
  83. /*!
  84. \brief Equidistant Cylindrical (Plate Caree) projection
  85. \ingroup projections
  86. \tparam Geographic latlong point type
  87. \tparam Cartesian xy point type
  88. \tparam Parameters parameter type
  89. \par Projection characteristics
  90. - Cylindrical
  91. - Spheroid
  92. \par Projection parameters
  93. - lat_ts: Latitude of true scale (degrees)
  94. - lat_0: Latitude of origin
  95. \par Example
  96. \image html ex_eqc.gif
  97. */
  98. template <typename T, typename Parameters>
  99. struct eqc_spheroid : public detail::eqc::base_eqc_spheroid<T, Parameters>
  100. {
  101. template <typename Params>
  102. inline eqc_spheroid(Params const& params, Parameters & par)
  103. {
  104. detail::eqc::setup_eqc(params, par, this->m_proj_parm);
  105. }
  106. };
  107. #ifndef DOXYGEN_NO_DETAIL
  108. namespace detail
  109. {
  110. // Static projection
  111. BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_eqc, eqc_spheroid)
  112. // Factory entry(s)
  113. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(eqc_entry, eqc_spheroid)
  114. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(eqc_init)
  115. {
  116. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(eqc, eqc_entry);
  117. }
  118. } // namespace detail
  119. #endif // doxygen
  120. } // namespace projections
  121. }} // namespace boost::geometry
  122. #endif // BOOST_GEOMETRY_PROJECTIONS_EQC_HPP