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File://proc/self/root/usr/include/boost/geometry/srs/projections/impl/pj_datums.hpp

// Boost.Geometry (aka GGL, Generic Geometry Library)
// This file is manually converted from PROJ4

// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.

// This file was modified by Oracle on 2017, 2018.
// Modifications copyright (c) 2017-2018, Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle

// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

// This file is converted from PROJ4, http://trac.osgeo.org/proj
// PROJ4 is originally written by Gerald Evenden (then of the USGS)
// PROJ4 is maintained by Frank Warmerdam
// PROJ4 is converted to Geometry Library by Barend Gehrels (Geodan, Amsterdam)

// Original copyright notice:

// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

#ifndef BOOST_GEOMETRY_PROJECTIONS_IMPL_PJ_DATUMS_HPP
#define BOOST_GEOMETRY_PROJECTIONS_IMPL_PJ_DATUMS_HPP

#include <boost/geometry/srs/projections/par_data.hpp>
#include <boost/geometry/srs/projections/dpar.hpp>

#include <string>

namespace boost { namespace geometry { namespace projections {

namespace detail {

// Originally defined in projects.h
template <typename T>
struct pj_datums_type
{
    std::string id;         /* datum keyword */
    //std::string defn_n;     /* e.g. "to_wgs84" */
    //std::string defn_v;     /* e.g. "0,0,0" */
    //std::string ellipse_id; /* ie from ellipse table */
    //std::string comments;   /* EPSG code, etc */
    srs::detail::nadgrids nadgrids;
    srs::detail::towgs84<T> towgs84;
    srs::dpar::value_ellps ellps;
};

// Originally defined in projects.h
struct pj_prime_meridians_type
{
    std::string id;   /* prime meridian keyword */
    //std::string defn; /* offset from greenwich in DMS format. */
    double deg;
};

inline double dms2d(double d, double m, double s, bool east)
{
    return (east ? 1 : -1) * (d + m / 60.0 + s / 3600.0);
}

/*
 * The ellipse code must match one from pj_ellps.c.  The datum id should
 * be kept to 12 characters or less if possible.  Use the official OGC
 * datum name for the comments if available.
 */

template <typename T>
inline std::pair<const pj_datums_type<T>*, int> pj_get_datums()
{
    static const pj_datums_type<T> pj_datums[] =
    {
        {"WGS84",           //"towgs84",   "0,0,0",
                            //"WGS84",     "",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(0,0,0),
                            srs::dpar::ellps_wgs84},

        {"GGRS87",          //"towgs84",   "-199.87,74.79,246.62",
                            //"GRS80",     "Greek_Geodetic_Reference_System_1987",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(-199.87,74.79,246.62),
                            srs::dpar::ellps_grs80},

        {"NAD83",           //"towgs84",   "0,0,0",
                            //"GRS80",     "North_American_Datum_1983",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(0,0,0),
                            srs::dpar::ellps_grs80},

        {"NAD27",           //"nadgrids",  "@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat",
                            //"clrk66",    "North_American_Datum_1927",
                            srs::detail::nadgrids("@conus","@alaska","@ntv2_0.gsb","@ntv1_can.dat"),
                            srs::detail::towgs84<T>(),
                            srs::dpar::ellps_clrk66},

        {"potsdam",         //"towgs84",   "598.1,73.7,418.2,0.202,0.045,-2.455,6.7",
                            //"bessel",    "Potsdam Rauenberg 1950 DHDN",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(598.1,73.7,418.2,0.202,0.045,-2.455,6.7),
                            srs::dpar::ellps_bessel},

        {"carthage",        //"towgs84",   "-263.0,6.0,431.0",
                            //"clrk80ign", "Carthage 1934 Tunisia",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(-263.0,6.0,431.0),
                            srs::dpar::ellps_clrk80ign},

        {"hermannskogel",   //"towgs84",   "577.326,90.129,463.919,5.137,1.474,5.297,2.4232",
                            //"bessel",    "Hermannskogel",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(577.326,90.129,463.919,5.137,1.474,5.297,2.4232),
                            srs::dpar::ellps_bessel},

        {"ire65",           //"towgs84",   "482.530,-130.596,564.557,-1.042,-0.214,-0.631,8.15",
                            //"mod_airy",  "Ireland 1965",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(482.530,-130.596,564.557,-1.042,-0.214,-0.631,8.15),
                            srs::dpar::ellps_mod_airy},

        {"nzgd49",          //"towgs84",   "59.47,-5.04,187.44,0.47,-0.1,1.024,-4.5993",
                            //"intl",      "New Zealand Geodetic Datum 1949",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(59.47,-5.04,187.44,0.47,-0.1,1.024,-4.5993),
                            srs::dpar::ellps_intl},

        {"OSGB36",          //"towgs84",   "446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894",
                            //"airy",      "Airy 1830",
                            srs::detail::nadgrids(),
                            srs::detail::towgs84<T>(446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894),
                            srs::dpar::ellps_airy}
    };

    return std::make_pair(pj_datums, (int)(sizeof(pj_datums) / sizeof(pj_datums[0])));
}

static const pj_prime_meridians_type pj_prime_meridians[] =
{
    /* id          definition */
    /* --          ---------- */
    { "greenwich", /*"0dE",*/             0 },
    { "lisbon",    /*"9d07'54.862\"W",*/  dms2d(  9, 7,54.862,false) },
    { "paris",     /*"2d20'14.025\"E",*/  dms2d(  2,20,14.025,true) },
    { "bogota",    /*"74d04'51.3\"W",*/   dms2d( 74, 4,51.3,  false) },
    { "madrid",    /*"3d41'16.58\"W",*/   dms2d(  3,41,16.58, false) },
    { "rome",      /*"12d27'8.4\"E",*/    dms2d( 12,27, 8.4,  true) },
    { "bern",      /*"7d26'22.5\"E",*/    dms2d(  7,26,22.5,  true) },
    { "jakarta",   /*"106d48'27.79\"E",*/ dms2d(106,48,27.79, true) },
    { "ferro",     /*"17d40'W",*/         dms2d( 17,40, 0,    false) },
    { "brussels",  /*"4d22'4.71\"E",*/    dms2d(  4,22,4.71,  true) },
    { "stockholm", /*"18d3'29.8\"E",*/    dms2d( 18, 3,29.8,  true) },
    { "athens",    /*"23d42'58.815\"E",*/ dms2d( 23,42,58.815,true) },
    { "oslo",      /*"10d43'22.5\"E",*/   dms2d( 10,43,22.5,  true) }
};

} // namespace detail
}}} // namespace boost::geometry::projections

#endif // BOOST_GEOMETRY_PROJECTIONS_IMPL_PJ_DATUMS_HPP

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