69 lines
2.8 KiB
C++
69 lines
2.8 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) 2012 Artem Pavlenko
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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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#ifndef GEOJSON_DATASOURCE_HPP
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#define GEOJSON_DATASOURCE_HPP
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// mapnik
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#include <mapnik/datasource.hpp>
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// boost
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#include <boost/geometry/geometries/box.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/algorithms/area.hpp>
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#include <boost/geometry/extensions/index/rtree/rtree.hpp>
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#include <boost/geometry/geometries/geometries.hpp>
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#include <boost/geometry/extensions/index/rtree/rtree.hpp>
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class geojson_datasource : public mapnik::datasource
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{
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public:
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typedef boost::geometry::model::d2::point_xy<double> point_type;
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typedef boost::geometry::model::box<point_type> box_type;
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typedef boost::geometry::index::rtree<box_type,std::size_t> spatial_index_type;
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// constructor
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geojson_datasource(mapnik::parameters const& params, bool bind=true);
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virtual ~geojson_datasource ();
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mapnik::datasource::datasource_t type() const;
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static std::string name();
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mapnik::featureset_ptr features(mapnik::query const& q) const;
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mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt) const;
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mapnik::box2d<double> envelope() const;
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mapnik::layer_descriptor get_descriptor() const;
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std::map<std::string, mapnik::parameters> get_statistics() const;
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boost::optional<mapnik::datasource::geometry_t> get_geometry_type() const;
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void bind() const;
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private:
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static const std::string name_;
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mapnik::datasource::datasource_t type_;
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mutable std::map<std::string, mapnik::parameters> statistics_;
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mutable mapnik::layer_descriptor desc_;
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mutable std::string file_;
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mutable mapnik::box2d<double> extent_;
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boost::shared_ptr<mapnik::transcoder> tr_;
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mutable std::vector<mapnik::feature_ptr> features_;
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mutable spatial_index_type tree_;
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mutable std::deque<std::size_t> index_array_;
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};
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#endif // FILE_DATASOURCE_HPP
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