From cc5f891b1a6e2c0fff44b998f8fc152d86fb03fc Mon Sep 17 00:00:00 2001
From: Barend Gehrels <barend@xs4all.nl>
Date: Wed, 29 Apr 2015 11:07:59 +0200
Subject: [PATCH] [projections] enable sphere for utm, which can be done if the
 throw at non par.es is skipped

---
 .../extensions/gis/projections/proj/tmerc.hpp | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/include/boost/geometry/extensions/gis/projections/proj/tmerc.hpp b/include/boost/geometry/extensions/gis/projections/proj/tmerc.hpp
index 384059f12..6816a7fdb 100644
--- a/include/boost/geometry/extensions/gis/projections/proj/tmerc.hpp
+++ b/include/boost/geometry/extensions/gis/projections/proj/tmerc.hpp
@@ -244,7 +244,6 @@ namespace boost { namespace geometry { namespace projections
             void setup_utm(Parameters& par, par_tmerc& proj_parm)
             {
                 int zone;
-                if (!par.es) throw proj_exception(-34);
                 par.y0 = pj_param(par.params, "bsouth").i ? 10000000. : 0.;
                 par.x0 = 500000.;
                 if (pj_param(par.params, "tzone").i) /* zone input ? */
@@ -332,6 +331,28 @@ namespace boost { namespace geometry { namespace projections
         }
     };
 
+    /*!
+        \brief Universal Transverse Mercator (UTM) projection
+        \ingroup projections
+        \tparam Geographic latlong point type
+        \tparam Cartesian xy point type
+        \tparam Parameters parameter type
+        \par Projection characteristics
+         - Cylindrical
+         - Spheroid
+         - zone= south
+        \par Example
+        \image html ex_utm.gif
+    */
+    template <typename Geographic, typename Cartesian, typename Parameters = parameters>
+    struct utm_spheroid : public detail::tmerc::base_tmerc_spheroid<Geographic, Cartesian, Parameters>
+    {
+        inline utm_spheroid(const Parameters& par) : detail::tmerc::base_tmerc_spheroid<Geographic, Cartesian, Parameters>(par)
+        {
+            detail::tmerc::setup_utm(this->m_par, this->m_proj_parm);
+        }
+    };
+
     #ifndef DOXYGEN_NO_DETAIL
     namespace detail
     {