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/**
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This file is part of osm2pgsql (https://osm2pgsql.org/).
*
* Copyright (C) 2006-2025 by the osm2pgsql developer community.
* For a full list of authors see the git log.
*/
#include <catch.hpp>
#include "common-buffer.hpp"
#include "geom-from-osm.hpp"
#include "geom-functions.hpp"
#include "geom-output.hpp"
#include "geom.hpp"
TEST_CASE("multipolygon geometry with single outer, no inner", "[NoDB]")
{
geom::geometry_t geom{geom::multipolygon_t{}};
auto &mp = geom.get<geom::multipolygon_t>();
// MULTIPOLYGON(((0 0, 0 1, 1 1, 1 0, 0 0)))
mp.add_geometry(
geom::polygon_t{geom::ring_t{{0, 0}, {0, 1}, {1, 1}, {1, 0}, {0, 0}}});
REQUIRE(geometry_type(geom) == "MULTIPOLYGON");
REQUIRE(dimension(geom) == 2);
REQUIRE(num_geometries(geom) == 1);
REQUIRE(area(geom) == Approx(1.0));
REQUIRE(spherical_area(geom) == Approx(12364031798.5));
REQUIRE(length(geom) == Approx(0.0));
REQUIRE(centroid(geom) == geom::geometry_t{geom::point_t{0.5, 0.5}});
REQUIRE(geometry_n(geom, 1) ==
geom::geometry_t{geom::polygon_t{
geom::ring_t{{0, 0}, {0, 1}, {1, 1}, {1, 0}, {0, 0}}}});
}
TEST_CASE("multipolygon geometry with two polygons", "[NoDB]")
{
geom::geometry_t geom{geom::multipolygon_t{}};
auto &mp = geom.get<geom::multipolygon_t>();
// MULTIPOLYGON(((0 0, 0 1, 1 1, 1 0, 0 0)), ((2 2, 2 5, 5 5, 5 2, 2 2), (3 3, 4 3, 4 4, 3 4, 3 3)))
mp.add_geometry(
geom::polygon_t{geom::ring_t{{0, 0}, {0, 1}, {1, 1}, {1, 0}, {0, 0}}});
geom::polygon_t polygon{
geom::ring_t{{2, 2}, {2, 5}, {5, 5}, {5, 2}, {2, 2}}};
polygon.add_inner_ring(
geom::ring_t{{3, 3}, {4, 3}, {4, 4}, {3, 4}, {3, 3}});
REQUIRE(polygon.num_geometries() == 1);
REQUIRE(polygon.inners().size() == 1);
mp.add_geometry(std::move(polygon));
REQUIRE(geometry_type(geom) == "MULTIPOLYGON");
REQUIRE(dimension(geom) == 2);
REQUIRE(num_geometries(geom) == 2);
REQUIRE(area(geom) == Approx(9.0));
REQUIRE(spherical_area(geom) == Approx(111106540105.7));
REQUIRE(length(geom) == Approx(0.0));
}
TEST_CASE("create_multipolygon creates simple polygon from OSM data", "[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1x1y1,n2x2y1,n3x2y2,n4x1y2");
buffer.add_way("w21 Nn4x1y2,n1x1y1");
auto const &relation = buffer.add_relation("r30 Mw20@,w21@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_polygon());
REQUIRE(geometry_type(geom) == "POLYGON");
REQUIRE(dimension(geom) == 2);
REQUIRE(num_geometries(geom) == 1);
REQUIRE(area(geom) == Approx(1.0));
REQUIRE(length(geom) == Approx(0.0));
REQUIRE(
geom.get<geom::polygon_t>() ==
geom::polygon_t{geom::ring_t{{1, 1}, {2, 1}, {2, 2}, {1, 2}, {1, 1}}});
REQUIRE(centroid(geom) == geom::geometry_t{geom::point_t{1.5, 1.5}});
}
TEST_CASE("create_multipolygon from OSM data", "[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1x1y1,n2x2y1,n3x2y2,n4x1y2");
buffer.add_way("w21 Nn4x1y2,n1x1y1");
buffer.add_way("w22 Nn5x10y10,n6x10y20,n7x20y20,n5x10y10");
auto const &relation = buffer.add_relation("r30 Mw20@,w21@,w22@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_multipolygon());
REQUIRE(geometry_type(geom) == "MULTIPOLYGON");
REQUIRE(num_geometries(geom) == 2);
REQUIRE(area(geom) == Approx(51.0));
REQUIRE(length(geom) == Approx(0.0));
}
TEST_CASE("create_multipolygon from OSM data without locations", "[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1,n2,n3,n1");
auto const &relation = buffer.add_relation("r30 Mw20@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_null());
}
TEST_CASE("create_multipolygon from invalid OSM data (single node)", "[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1x1y1");
auto const &relation = buffer.add_relation("r30 Mw20@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_null());
}
TEST_CASE("create_multipolygon from invalid OSM data (way node closed)",
"[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1x1y1,n2x2y2");
auto const &relation = buffer.add_relation("r30 Mw20@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_null());
}
TEST_CASE("create_multipolygon from invalid OSM data (self-intersection)",
"[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn1x1y1,n2x1y2,n3x2y1,n4x2y2");
buffer.add_way("w21 Nn4x2y2,n1x1y1");
auto const &relation = buffer.add_relation("r30 Mw20@,w21@");
osmium::memory::Buffer area_buffer{1024};
auto const geom =
geom::create_multipolygon(relation, buffer.buffer(), &area_buffer);
REQUIRE(geom.is_null());
}
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