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diff --git a/boost/geometry/srs/projections/impl/base_dynamic.hpp b/boost/geometry/srs/projections/impl/base_dynamic.hpp
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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
+
+// This file was modified by Oracle on 2017.
+// Modifications copyright (c) 2017, Oracle and/or its affiliates.
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// 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_PROJECTIONS_IMPL_BASE_DYNAMIC_HPP
+#define BOOST_GEOMETRY_PROJECTIONS_IMPL_BASE_DYNAMIC_HPP
+
+#include <string>
+
+#include <boost/geometry/srs/projections/impl/projects.hpp>
+
+namespace boost { namespace geometry { namespace projections
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail
+{
+
+/*!
+    \brief projection virtual base class
+    \details class containing virtual methods
+    \ingroup projection
+    \tparam CT calculation type
+    \tparam P parameters type
+*/
+template <typename CT, typename P>
+class base_v
+{
+public :
+    /// Forward projection, from Latitude-Longitude to Cartesian
+    template <typename LL, typename XY>
+    inline bool forward(LL const& lp, XY& xy) const
+    {
+        try
+        {
+            pj_fwd(*this, this->params(), lp, xy);
+            return true;
+        }
+        catch (...)
+        {
+            return false;
+        }
+    }
+
+    /// Inverse projection, from Cartesian to Latitude-Longitude
+    template <typename LL, typename XY>
+    inline bool inverse(XY const& xy, LL& lp) const
+    {
+        try
+        {
+            pj_inv(*this, this->params(), xy, lp);
+            return true;
+        }
+        catch (projection_not_invertible_exception &)
+        {
+            BOOST_RETHROW
+        }
+        catch (...)
+        {
+            return false;
+        }
+    }
+
+    /// Forward projection using lon / lat and x / y separately
+    virtual void fwd(CT& lp_lon, CT& lp_lat, CT& xy_x, CT& xy_y) const = 0;
+
+    /// Inverse projection using x / y and lon / lat
+    virtual void inv(CT& xy_x, CT& xy_y, CT& lp_lon, CT& lp_lat) const = 0;
+
+    /// Returns name of projection
+    virtual std::string name() const = 0;
+
+    /// Returns parameters of projection
+    virtual P const& params() const = 0;
+
+    /// Returns mutable parameters of projection
+    virtual P& mutable_params() = 0;
+
+    virtual ~base_v() {}
+};
+
+// Base-virtual-forward
+template <typename Prj, typename CT, typename P>
+class base_v_f : public base_v<CT, P>
+{
+public:
+    base_v_f(P const& params)
+        : m_proj(params)
+    {}
+
+    template <typename ProjP>
+    base_v_f(P const& params, ProjP const& proj_params)
+        : m_proj(params, proj_params)
+    {}
+
+    virtual void fwd(CT& lp_lon, CT& lp_lat, CT& xy_x, CT& xy_y) const
+    {
+        m_proj.fwd(lp_lon, lp_lat, xy_x, xy_y);
+    }
+
+    virtual void inv(CT& , CT& , CT& , CT& ) const
+    {
+        BOOST_THROW_EXCEPTION(projection_not_invertible_exception(params().name));
+    }
+
+    virtual std::string name() const { return m_proj.name(); }
+
+    virtual P const& params() const { return m_proj.params(); }
+
+    virtual P& mutable_params() { return m_proj.mutable_params(); }
+
+protected:
+    Prj m_proj;
+};
+
+// Base-virtual-forward/inverse
+template <typename Prj, typename CT, typename P>
+class base_v_fi : public base_v_f<Prj, CT, P>
+{
+    typedef base_v_f<Prj, CT, P> base_t;
+
+public:
+    base_v_fi(P const& params)
+        : base_t(params)
+    {}
+
+    template <typename ProjP>
+    base_v_fi(P const& params, ProjP const& proj_params)
+        : base_t(params, proj_params)
+    {}
+
+    virtual void inv(CT& xy_x, CT& xy_y, CT& lp_lon, CT& lp_lat) const
+    {
+        this->m_proj.inv(xy_x, xy_y, lp_lon, lp_lat);
+    }
+};
+
+} // namespace detail
+#endif // DOXYGEN_NO_DETAIL
+
+}}} // namespace boost::geometry::projections
+
+#endif // BOOST_GEOMETRY_PROJECTIONS_IMPL_BASE_DYNAMIC_HPP