--- /dev/null
+// Boost.Geometry
+
+// Copyright (c) 2020, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP
+#define BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP
+
+
+#include <type_traits>
+
+#include <boost/geometry/strategy/geographic/expand_segment.hpp>
+
+#include <boost/geometry/strategies/detail.hpp>
+#include <boost/geometry/strategies/expand/spherical.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+namespace strategies { namespace expand
+{
+
+template
+<
+ typename FormulaPolicy = strategy::andoyer,
+ typename Spheroid = srs::spheroid<double>,
+ typename CalculationType = void
+>
+class geographic : strategies::detail::geographic_base<Spheroid>
+{
+ using base_t = strategies::detail::geographic_base<Spheroid>;
+
+public:
+ geographic()
+ : base_t()
+ {}
+
+ explicit geographic(Spheroid const& spheroid)
+ : base_t(spheroid)
+ {}
+
+ template <typename Box, typename Geometry>
+ static auto expand(Box const&, Geometry const&,
+ typename util::enable_if_point_t<Geometry> * = nullptr)
+ {
+ return strategy::expand::spherical_point();
+ }
+
+ template <typename Box, typename Geometry>
+ static auto expand(Box const&, Geometry const&,
+ typename util::enable_if_box_t<Geometry> * = nullptr)
+ {
+ return strategy::expand::spherical_box();
+ }
+
+ template <typename Box, typename Geometry>
+ auto expand(Box const&, Geometry const&,
+ typename util::enable_if_segment_t<Geometry> * = nullptr) const
+ {
+ return strategy::expand::geographic_segment
+ <
+ FormulaPolicy, Spheroid, CalculationType
+ >(base_t::m_spheroid);
+ }
+};
+
+
+namespace services
+{
+
+template <typename Box, typename Geometry>
+struct default_strategy<Box, Geometry, geographic_tag>
+{
+ using type = strategies::expand::geographic<>;
+};
+
+
+template <typename FP, typename S, typename CT>
+struct strategy_converter<strategy::expand::geographic_segment<FP, S, CT> >
+{
+ static auto get(strategy::expand::geographic_segment<FP, S, CT> const& s)
+ {
+ return strategies::expand::geographic<FP, S, CT>(s.model());
+ }
+};
+
+
+} // namespace services
+
+}} // namespace strategies::envelope
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_STRATEGIES_EXPAND_GEOGRAPHIC_HPP