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diff --git a/boost/geometry/core/coordinate_system.hpp b/boost/geometry/core/coordinate_system.hpp
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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
+// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
+// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
+
+// 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_COORDINATE_SYSTEM_HPP
+#define BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
+
+
+#include <boost/mpl/assert.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#include <boost/geometry/core/point_type.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+
+namespace traits
+{
+
+/*!
+\brief Traits class defining the coordinate system of a point, important for strategy selection
+\ingroup traits
+\par Geometries:
+    - point
+\par Specializations should provide:
+    - typedef CS type; (cs::cartesian, cs::spherical, etc)
+*/
+template <typename Point, typename Enable = void>
+struct coordinate_system
+{
+    BOOST_MPL_ASSERT_MSG
+        (
+            false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>)
+        );
+};
+
+} // namespace traits
+
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace core_dispatch
+{
+    template <typename GeometryTag, typename G>
+    struct coordinate_system
+    {
+        typedef typename point_type<GeometryTag, G>::type P;
+
+        // Call its own specialization on point-tag
+        typedef typename coordinate_system<point_tag, P>::type type;
+    };
+
+
+    template <typename P>
+    struct coordinate_system<point_tag, P>
+    {
+        typedef typename traits::coordinate_system<P>::type type;
+    };
+
+
+} // namespace core_dispatch
+#endif
+
+
+/*!
+\brief \brief_meta{type, coordinate system (cartesian\, spherical\, etc), \meta_point_type}
+\tparam Geometry \tparam_geometry
+\ingroup core
+
+\qbk{[include reference/core/coordinate_system.qbk]}
+*/
+template <typename Geometry>
+struct coordinate_system
+{
+    typedef typename boost::remove_const<Geometry>::type ncg;
+    typedef typename core_dispatch::coordinate_system
+        <
+            typename tag<Geometry>::type,
+            ncg
+        >::type type;
+};
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP