// Boost.Geometry (aka GGL, Generic Geometry Library) // QuickBook Example // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands. // 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) //[simplify_inserter //` Simplify a linestring using an output iterator #include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/linestring.hpp> #include <boost/geometry/geometries/point_xy.hpp> int main() { typedef boost::geometry::model::d2::point_xy<double> P; typedef boost::geometry::model::linestring<P> L; L line; boost::geometry::read_wkt("linestring(1.1 1.1, 2.5 2.1, 3.1 3.1, 4.9 1.1, 3.1 1.9)", line); typedef boost::geometry::strategy::distance::projected_point<P, P> DS; typedef boost::geometry::strategy::simplify::douglas_peucker<P, DS> simplification; L simplified; boost::geometry::simplify_inserter(line, std::back_inserter(simplified), 0.5, simplification()); //std::ostream_iterator<P>(std::cout, "\n"), 0.5);//); //std::cout << simplified[0]; //boost::geometry::simplify_inserter(line, std::ostream_iterator<P>(std::cout, "\n"), 0.5);//, simplification()); std::ostream_iterator<P> out(std::cout, "\n"); std::copy(simplified.begin(), simplified.end(), out); std::cout << " original: " << boost::geometry::dsv(line) << std::endl << "simplified: " << boost::geometry::dsv(simplified) << std::endl; return 0; } //] //[simplify_inserter_output /*` Output: [pre simplify_inserter: 16 simplify_inserter: 0.339837 ] */ //] /* OUTPUT POINT(1.1 1.1) original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) */ /* OUTPUT POINT(1.1 1.1) original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) */ /* OUTPUT POINT(1.1 1.1) original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) */