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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
- // This file was modified by Oracle on 2014, 2018.
- // Modifications copyright (c) 2014-2018 Oracle and/or its affiliates.
- // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, 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)
- #ifndef BOOST_GEOMETRY_CORE_TAGS_HPP
- #define BOOST_GEOMETRY_CORE_TAGS_HPP
- namespace boost { namespace geometry
- {
- // Tags defining strategies linked to coordinate systems
- /// Tag used for undefined coordinate system
- struct cs_undefined_tag {};
- /// Tag used for casting spherical/geographic coordinate systems
- struct spherical_tag {};
- /// Tag indicating Cartesian coordinate system family (cartesian,epsg)
- struct cartesian_tag {};
- /// Tag indicating Spherical polar coordinate system family
- struct spherical_polar_tag : spherical_tag {};
- /// Tag indicating Spherical equatorial coordinate system family
- struct spherical_equatorial_tag : spherical_tag {};
- /// Tag indicating Geographic coordinate system family (geographic)
- struct geographic_tag : spherical_tag {};
- // Tags defining coordinate systems reference models
- /// For reference spheroid defining parameters of geographical coordinate system
- struct srs_spheroid_tag {};
- /// For reference sphere defining parameters of spherical coordinate system
- struct srs_sphere_tag : srs_spheroid_tag {};
- // Tags defining tag hierarchy
- /// For single-geometries (point, linestring, polygon, box, ring, segment)
- struct single_tag {};
- /// For multiple-geometries (multi_point, multi_linestring, multi_polygon)
- struct multi_tag {};
- /// For point-like types (point, multi_point)
- struct pointlike_tag {};
- /// For linear types (linestring, multi-linestring, segment)
- struct linear_tag {};
- /// For areal types (polygon, multi_polygon, box, ring)
- struct areal_tag {};
- // Subset of areal types (polygon, multi_polygon, ring)
- struct polygonal_tag : areal_tag {};
- /// For volume types (also box (?), polyhedron)
- struct volumetric_tag {};
- // Tags defining geometry types
- /// "default" tag
- struct geometry_not_recognized_tag {};
- /// OGC Point identifying tag
- struct point_tag : single_tag, pointlike_tag {};
- /// OGC Linestring identifying tag
- struct linestring_tag : single_tag, linear_tag {};
- /// OGC Polygon identifying tag
- struct polygon_tag : single_tag, polygonal_tag {};
- /// Convenience (linear) ring identifying tag
- struct ring_tag : single_tag, polygonal_tag {};
- /// Convenience 2D or 3D box (mbr / aabb) identifying tag
- struct box_tag : single_tag, areal_tag {};
- /// Convenience segment (2-points) identifying tag
- struct segment_tag : single_tag, linear_tag {};
- /// OGC Multi point identifying tag
- struct multi_point_tag : multi_tag, pointlike_tag {};
- /// OGC Multi linestring identifying tag
- struct multi_linestring_tag : multi_tag, linear_tag {};
- /// OGC Multi polygon identifying tag
- struct multi_polygon_tag : multi_tag, polygonal_tag {};
- /// OGC Geometry Collection identifying tag
- struct geometry_collection_tag : multi_tag {};
- /*!
- \brief Meta-function to get for a tag of a multi-geometry
- the tag of the corresponding single-geometry
- */
- template <typename Tag>
- struct single_tag_of
- {};
- #ifndef DOXYGEN_NO_DETAIL
- template <>
- struct single_tag_of<multi_point_tag>
- {
- typedef point_tag type;
- };
- template <>
- struct single_tag_of<multi_linestring_tag>
- {
- typedef linestring_tag type;
- };
- template <>
- struct single_tag_of<multi_polygon_tag>
- {
- typedef polygon_tag type;
- };
- #endif
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_CORE_TAGS_HPP
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