From 0f3eecbe5eecb86f1baa669ca7be45294d0cc94f Mon Sep 17 00:00:00 2001
From: Jiri Drbalek <jiri.drbalek@firma.seznam.cz>
Date: Tue, 27 Sep 2016 20:23:45 +0000
Subject: [PATCH] fix intersecting extents in different projections

---
 include/mapnik/feature_style_processor_impl.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/mapnik/feature_style_processor_impl.hpp b/include/mapnik/feature_style_processor_impl.hpp
index 89e0c3a6d..2fea9d8b3 100644
--- a/include/mapnik/feature_style_processor_impl.hpp
+++ b/include/mapnik/feature_style_processor_impl.hpp
@@ -266,6 +266,7 @@ void feature_style_processor<Processor>::prepare_layer(layer_rendering_material
     }
 
     box2d<double> layer_ext = lay.envelope();
+    const box2d<double> buffered_query_ext_map_srs = buffered_query_ext;
     bool fw_success = false;
     bool early_return = false;
 
@@ -281,9 +282,9 @@ void feature_style_processor<Processor>::prepare_layer(layer_rendering_material
         early_return = true;
     }
     // next try intersection of layer extent back projected into map srs
-    else if (prj_trans.backward(layer_ext, PROJ_ENVELOPE_POINTS) && buffered_query_ext.intersects(layer_ext))
+    else if (prj_trans.backward(layer_ext, PROJ_ENVELOPE_POINTS) && buffered_query_ext_map_srs.intersects(layer_ext))
     {
-        layer_ext.clip(buffered_query_ext);
+        layer_ext.clip(buffered_query_ext_map_srs);
         // forward project layer extent back into native projection
         if (! prj_trans.forward(layer_ext, PROJ_ENVELOPE_POINTS))
         {