bb235fa316
Map and Layer objects both have a new parameter 'srs', initialized to "+proj=latlong +datum=WGS84" by default.
Basic usage (Python):
p = Projection("+proj=merc +datum=WGS84")
point = p.forward(Coord(-2,51))
...
2.reflected arithmetic operators for Envelope/Coord into Python
3.altered return policies for python objects
4.modified build system to require proj4 lib and headers
64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id$
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#include <boost/python.hpp>
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#include <mapnik/coord.hpp>
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#include <mapnik/projection.hpp>
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namespace {
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mapnik::coord2d forward(mapnik::coord2d const& pt,
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mapnik::projection const& prj)
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{
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double x = pt.x;
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double y = pt.y;
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prj.forward(x,y);
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return mapnik::coord2d(x,y);
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}
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mapnik::coord2d inverse(mapnik::coord2d const& pt,
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mapnik::projection const& prj)
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{
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double x = pt.x;
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double y = pt.y;
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prj.inverse(x,y);
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return mapnik::coord2d(x,y);
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}
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}
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void export_projection ()
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{
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using namespace boost::python;
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using mapnik::projection;
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class_<projection>("Projection", init<optional<std::string const&> >())
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.def ("forward",&projection::forward)
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.def ("inverse",&projection::inverse)
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.def ("params", make_function(&projection::params,
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return_value_policy<copy_const_reference>()))
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;
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def("forward",&forward);
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def("inverse",&inverse);
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}
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