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219 lines
9.3 KiB
C++
219 lines
9.3 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Unit Test
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK.
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <algorithms/test_area.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/geometries/point.hpp>
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#include <boost/geometry/geometries/box.hpp>
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#include <boost/geometry/geometries/ring.hpp>
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#include <boost/geometry/geometries/polygon.hpp>
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#include <test_geometries/all_custom_ring.hpp>
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#include <test_geometries/all_custom_polygon.hpp>
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//#define GEOMETRY_TEST_DEBUG
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template <typename Polygon>
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void test_polygon()
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{
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// Rotated square, length=sqrt(2) -> area=2
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test_geometry<Polygon>("POLYGON((1 1,2 2,3 1,2 0,1 1))", 2.0);
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test_geometry<Polygon>("POLYGON((1 1,2 2,3 1,2 0,1 1))", 2.0);
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test_geometry<Polygon>("POLYGON((0 0,0 7,4 2,2 0,0 0))", 16.0);
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test_geometry<Polygon>("POLYGON((1 1,2 1,2 2,1 2,1 1))", -1.0);
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test_geometry<Polygon>("POLYGON((0 0,0 7,4 2,2 0,0 0), (1 1,2 1,2 2,1 2,1 1))", 15.0);
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}
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template <typename P>
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void test_all()
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{
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test_geometry<bg::model::box<P> >("POLYGON((0 0,2 2))", 4.0);
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test_geometry<bg::model::box<P> >("POLYGON((2 2,0 0))", 4.0);
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test_polygon<bg::model::polygon<P> >();
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test_polygon<all_custom_polygon<P> >();
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// clockwise rings (second is wrongly ordered)
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test_geometry<bg::model::ring<P> >("POLYGON((0 0,0 7,4 2,2 0,0 0))", 16.0);
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test_geometry<bg::model::ring<P> >("POLYGON((0 0,2 0,4 2,0 7,0 0))", -16.0);
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test_geometry<all_custom_ring<P> >("POLYGON((0 0,0 7,4 2,2 0,0 0))", 16.0);
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// ccw
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test_geometry<bg::model::polygon<P, false> >
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("POLYGON((0 0,0 7,4 2,2 0,0 0), (1 1,2 1,2 2,1 2,1 1))", -15.0);
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}
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template <typename Point>
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void test_spherical(bool polar = false)
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{
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typedef typename bg::coordinate_type<Point>::type ct;
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bg::model::polygon<Point> geometry;
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// unit-sphere has area of 4-PI. Polygon covering 1/8 of it:
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// calculations splitted for ttmath
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ct const four = 4.0;
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ct const eight = 8.0;
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ct expected = four * boost::geometry::math::pi<ct>() / eight;
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bg::read_wkt("POLYGON((0 0,0 90,90 0,0 0))", geometry);
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ct area = bg::area(geometry);
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BOOST_CHECK_CLOSE(area, expected, 0.0001);
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// With strategy, radius 2 -> 4 pi r^2
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bg::strategy::area::huiller
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<
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typename bg::point_type<Point>::type
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> strategy(2.0);
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area = bg::area(geometry, strategy);
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ct const two = 2.0;
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BOOST_CHECK_CLOSE(area, two * two * expected, 0.0001);
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// Wrangel Island (dateline crossing)
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// With (spherical) Earth strategy
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bg::strategy::area::huiller
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<
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typename bg::point_type<Point>::type
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> spherical_earth(6373);
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bg::read_wkt("POLYGON((-178.7858 70.7852, 177.4758 71.2333, 179.7436 71.5733, -178.7858 70.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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// SQL Server gives: 4537.9654419375
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// PostGIS gives: 4537.9311668307
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// Note: those are Geographic, this test is Spherical
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BOOST_CHECK_CLOSE(area, 4506.6389, 0.001);
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// Wrangel, more in detail
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bg::read_wkt("POLYGON((-178.568604 71.564148,-178.017548 71.449692,-177.833313 71.3461,-177.502838 71.277466 ,-177.439453 71.226929,-177.620026 71.116638,-177.9389 71.037491,-178.8186 70.979965,-179.274445 70.907761,-180 70.9972,179.678314 70.895538,179.272766 70.888596,178.791016 70.7964,178.617737 71.035538,178.872192 71.217484,179.530273 71.4383 ,-180 71.535843 ,-179.628601 71.577194,-179.305298 71.551361,-179.03421 71.597748,-178.568604 71.564148))", geometry);
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area = bg::area(geometry, spherical_earth);
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// SQL Server gives: 7669.10402181435
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// PostGIS gives: 7669.55565459832
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BOOST_CHECK_CLOSE(area, 7616.523769, 0.001);
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// Check more at the equator
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/*
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select 1,geography::STGeomFromText('POLYGON((-178.7858 10.7852 , 179.7436 11.5733 , 177.4758 11.2333 , -178.7858 10.7852))',4326) .STArea()/1000000.0
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union select 2,geography::STGeomFromText('POLYGON((-178.7858 20.7852 , 179.7436 21.5733 , 177.4758 21.2333 , -178.7858 20.7852))',4326) .STArea()/1000000.0
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union select 3,geography::STGeomFromText('POLYGON((-178.7858 30.7852 , 179.7436 31.5733 , 177.4758 31.2333 , -178.7858 30.7852))',4326) .STArea()/1000000.0
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union select 0,geography::STGeomFromText('POLYGON((-178.7858 0.7852 , 179.7436 1.5733 , 177.4758 1.2333 , -178.7858 0.7852))',4326) .STArea()/1000000.0
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union select 4,geography::STGeomFromText('POLYGON((-178.7858 40.7852 , 179.7436 41.5733 , 177.4758 41.2333 , -178.7858 40.7852))',4326) .STArea()/1000000.0
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*/
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bg::read_wkt("POLYGON((-178.7858 0.7852, 177.4758 1.2333, 179.7436 1.5733, -178.7858 0.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 14136.09946, 0.001); // SQL Server gives: 14064.1902284513
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bg::read_wkt("POLYGON((-178.7858 10.7852, 177.4758 11.2333, 179.7436 11.5733, -178.7858 10.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 13760.2456, 0.001); // SQL Server gives: 13697.0941155193
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bg::read_wkt("POLYGON((-178.7858 20.7852, 177.4758 21.2333, 179.7436 21.5733, -178.7858 20.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 12987.8682, 0.001); // SQL Server gives: 12944.3970990317 -> -39m^2
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bg::read_wkt("POLYGON((-178.7858 30.7852, 177.4758 31.2333, 179.7436 31.5733, -178.7858 30.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 11856.3935, 0.001); // SQL Server gives: 11838.5338423574 -> -18m^2
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bg::read_wkt("POLYGON((-178.7858 40.7852, 177.4758 41.2333, 179.7436 41.5733, -178.7858 40.7852))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 10404.627685523914, 0.001); // SQL Server gives: 10412.0607137119, -> +8m^2
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// Concave
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bg::read_wkt("POLYGON((0 40,1 42,0 44,2 43,4 44,3 42,4 40,2 41,0 40))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 73538.2958, 0.001); // SQL Server gives: 73604.2047689719
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// With hole POLYGON((0 40,4 40,4 44,0 44,0 40),(1 41,2 43,3 42,1 41))
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bg::read_wkt("POLYGON((0 40,0 44,4 44,4 40,0 40),(1 41,3 42,2 43,1 41))", geometry);
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area = bg::area(geometry, spherical_earth);
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BOOST_CHECK_CLOSE(area, 133233.844876, 0.001); // SQL Server gives: 133353.335
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{
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bg::model::ring<Point> aurha; // a'dam-utr-rott.-den haag-a'dam
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bg::read_wkt("POLYGON((4.892 52.373,5.119 52.093,4.479 51.930,4.23 52.08,4.892 52.373))", aurha);
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if (polar)
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{
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// Create colatitudes (measured from pole)
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BOOST_FOREACH(Point& p, aurha)
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{
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bg::set<1>(p, ct(90) - bg::get<1>(p));
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}
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bg::correct(aurha);
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}
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bg::strategy::area::huiller
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<
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typename bg::point_type<Point>::type
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> huiller(6372.795);
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area = bg::area(aurha, huiller);
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BOOST_CHECK_CLOSE(area, 1476.645675, 0.0001);
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// SQL Server gives: 1481.55595960659
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// for select geography::STGeomFromText('POLYGON((4.892 52.373,4.23 52.08,4.479 51.930,5.119 52.093,4.892 52.373))',4326).STArea()/1000000.0
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}
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}
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template <typename P>
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void test_ccw()
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{
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typedef bg::model::polygon<P, false> ccw_polygon;
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// counterclockwise rings (second is wrongly ordered)
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test_geometry<ccw_polygon>("POLYGON((1 1,2 2,3 1,2 0,1 1))", -2.0);
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test_geometry<ccw_polygon>("POLYGON((1 1,2 0,3 1,2 2,1 1))", +2.0);
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test_geometry<ccw_polygon>("POLYGON((0 0,0 7,4 2,2 0,0 0))", -16.0);
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test_geometry<ccw_polygon>("POLYGON((0 0,2 0,4 2,0 7,0 0))", +16.0);
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}
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template <typename P>
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void test_open()
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{
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typedef bg::model::polygon<P, true, false> open_polygon;
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test_geometry<open_polygon>("POLYGON((1 1,2 2,3 1,2 0))", 2.0);
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// Note the triangular testcase used in CCW is not sensible for open/close
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}
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template <typename P>
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void test_open_ccw()
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{
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typedef bg::model::polygon<P, false, false> open_polygon;
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test_geometry<open_polygon>("POLYGON((1 1,2 0,3 1,2 2))", 2.0);
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// Note the triangular testcase used in CCW is not sensible for open/close
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}
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int test_main(int, char* [])
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{
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test_all<bg::model::point<int, 2, bg::cs::cartesian> >();
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test_all<bg::model::point<float, 2, bg::cs::cartesian> >();
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test_all<bg::model::point<double, 2, bg::cs::cartesian> >();
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test_spherical<bg::model::point<double, 2, bg::cs::spherical_equatorial<bg::degree> > >();
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//test_spherical<bg::model::point<double, 2, bg::cs::spherical<bg::degree> > >(true);
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test_ccw<bg::model::point<double, 2, bg::cs::cartesian> >();
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test_open<bg::model::point<double, 2, bg::cs::cartesian> >();
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test_open_ccw<bg::model::point<double, 2, bg::cs::cartesian> >();
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#ifdef HAVE_TTMATH
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test_all<bg::model::d2::point_xy<ttmath_big> >();
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test_spherical<bg::model::point<ttmath_big, 2, bg::cs::spherical_equatorial<bg::degree> > >();
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#endif
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return 0;
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}
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