projections/proj/latlong.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 // Purpose:  Stub projection implementation for lat/long coordinates. We
0023 //           don't actually change the coordinates, but we want proj=latlong
0024 //           to act sort of like a projection.
0025 // Author:   Frank Warmerdam, warmerdam@pobox.com
0026 // Copyright (c) 2000, Frank Warmerdam
0027
0028 // Permission is hereby granted, free of charge, to any person obtaining a
0029 // copy of this software and associated documentation files (the "Software"),
0030 // to deal in the Software without restriction, including without limitation
0031 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
0032 // and/or sell copies of the Software, and to permit persons to whom the
0033 // Software is furnished to do so, subject to the following conditions:
0034
0035 // The above copyright notice and this permission notice shall be included
0036 // in all copies or substantial portions of the Software.
0037
0038 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
0039 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0040 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
0041 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0042 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0043 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0044 // DEALINGS IN THE SOFTWARE.
0045
0046 #ifndef BOOST_GEOMETRY_PROJECTIONS_LATLONG_HPP
0047 #define BOOST_GEOMETRY_PROJECTIONS_LATLONG_HPP
0048
0049 #include <boost/geometry/srs/projections/impl/base_static.hpp>
0050 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
0051 #include <boost/geometry/srs/projections/impl/projects.hpp>
0052 #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
0053
0054
0055 namespace boost { namespace geometry
0056 {
0057
0058 namespace projections
0059 {
0060     #ifndef DOXYGEN_NO_DETAIL
0061     namespace detail { namespace latlong
0062     {
0063
0064             /* very loosely based upon DMA code by Bradford W. Drew */
0065
0066             template <typename T, typename Parameters>
0067             struct base_latlong_other
0068             {
0069                 // FORWARD(forward)
0070                 // Project coordinates from geographic (lon, lat) to cartesian (x, y)
0071                 inline void fwd(Parameters const& par, T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
0072                 {
0073                     // TODO: in the original code a is not used
0074                     // different mechanism is probably used instead
0075                     xy_x = lp_lon / par.a;
0076                     xy_y = lp_lat / par.a;
0077                 }
0078
0079                 // INVERSE(inverse)
0080                 // Project coordinates from cartesian (x, y) to geographic (lon, lat)
0081                 inline void inv(Parameters const& par, T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
0082                 {
0083                     // TODO: in the original code a is not used
0084                     // different mechanism is probably used instead
0085                     lp_lat = xy_y * par.a;
0086                     lp_lon = xy_x * par.a;
0087                 }
0088
0089                 static inline std::string get_name()
0090                 {
0091                     return "latlong_other";
0092                 }
0093
0094             };
0095
0096             // Lat/long (Geodetic)
0097             template <typename Parameters>
0098             inline void setup_latlong(Parameters& par)
0099             {
0100                     par.is_latlong = 1;
0101                     par.x0 = 0.0;
0102                     par.y0 = 0.0;
0103             }
0104
0105     }} // namespace detail::latlong
0106     #endif // doxygen
0107
0108     /*!
0109         \brief Lat/long (Geodetic) projection
0110         \ingroup projections
0111         \tparam Geographic latlong point type
0112         \tparam Cartesian xy point type
0113         \tparam Parameters parameter type
0114         \par Example
0115         \image html ex_latlong.gif
0116     */
0117     template <typename T, typename Parameters>
0118     struct latlong_other : public detail::latlong::base_latlong_other<T, Parameters>
0119     {
0120         template <typename Params>
0121         inline latlong_other(Params const& , Parameters & par)
0122         {
0123             detail::latlong::setup_latlong(par);
0124         }
0125     };
0126
0127     #ifndef DOXYGEN_NO_DETAIL
0128     namespace detail
0129     {
0130
0131         // Static projection
0132         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_lonlat, latlong_other)
0133         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_latlon, latlong_other)
0134         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_latlong, latlong_other)
0135         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_longlat, latlong_other)
0136
0137         // Factory entry(s)
0138         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(latlong_entry, latlong_other)
0139
0140         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(latlong_init)
0141         {
0142             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(lonlat, latlong_entry)
0143             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(latlon, latlong_entry)
0144             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(latlong, latlong_entry)
0145             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(longlat, latlong_entry)
0146         }
0147
0148     } // namespace detail
0149     #endif // doxygen
0150
0151 } // namespace projections
0152
0153 }} // namespace boost::geometry
0154
0155 #endif // BOOST_GEOMETRY_PROJECTIONS_LATLONG_HPP
0156