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Diffstat (limited to 'boost/geometry/srs/projections/impl/pj_inv.hpp')
-rw-r--r-- | boost/geometry/srs/projections/impl/pj_inv.hpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/boost/geometry/srs/projections/impl/pj_inv.hpp b/boost/geometry/srs/projections/impl/pj_inv.hpp new file mode 100644 index 0000000000..91cf4c50f6 --- /dev/null +++ b/boost/geometry/srs/projections/impl/pj_inv.hpp @@ -0,0 +1,82 @@ +// 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. +// Modifications copyright (c) 2017, 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_PJ_INV_HPP +#define BOOST_GEOMETRY_PROJECTIONS_PJ_INV_HPP + + + +#include <boost/geometry/srs/projections/impl/adjlon.hpp> +#include <boost/geometry/core/radian_access.hpp> +#include <boost/geometry/util/math.hpp> + +/* general inverse projection */ + +namespace boost { namespace geometry { namespace projections +{ + +namespace detail +{ + + /* inverse projection entry */ +template <typename PRJ, typename LL, typename XY, typename PAR> +inline void pj_inv(PRJ const& prj, PAR const& par, XY const& xy, LL& ll) +{ + typedef typename PAR::type calc_t; + static const calc_t EPS = 1.0e-12; + + /* can't do as much preliminary checking as with forward */ + /* descale and de-offset */ + calc_t xy_x = (geometry::get<0>(xy) * par.to_meter - par.x0) * par.ra; + calc_t xy_y = (geometry::get<1>(xy) * par.to_meter - par.y0) * par.ra; + calc_t lon = 0, lat = 0; + prj.inv(xy_x, xy_y, lon, lat); /* inverse project */ + lon += par.lam0; /* reduce from del lp.lam */ + if (!par.over) + lon = adjlon(lon); /* adjust longitude to CM */ + if (par.geoc && geometry::math::abs(geometry::math::abs(lat)-geometry::math::half_pi<calc_t>()) > EPS) + lat = atan(par.one_es * tan(lat)); + + geometry::set_from_radian<0>(ll, lon); + geometry::set_from_radian<1>(ll, lat); +} + +} // namespace detail +}}} // namespace boost::geometry::projections + +#endif |