diff --git a/examples/osgdem/DataSet.cpp b/examples/osgdem/DataSet.cpp
index ba9cf71f9..36f31cb43 100644
--- a/examples/osgdem/DataSet.cpp
+++ b/examples/osgdem/DataSet.cpp
@@ -1039,10 +1039,10 @@ void DataSet::DestinationTile::computeNeighboursFromQuadMap()
 {
     if (_dataSet)
     {
-        setNeighbours(_dataSet->getTile(_level,_X-1,_Y),_dataSet->getTile(_level,_X-1,_Y-1),
-                      _dataSet->getTile(_level,_X,_Y-1),_dataSet->getTile(_level,_X+1,_Y-1),
-                      _dataSet->getTile(_level,_X+1,_Y),_dataSet->getTile(_level,_X+1,_Y+1),
-                      _dataSet->getTile(_level,_X,_Y+1),_dataSet->getTile(_level,_X-1,_Y+1));
+        setNeighbours(_dataSet->getTile(_level,_tileX-1,_tileY),_dataSet->getTile(_level,_tileX-1,_tileY-1),
+                      _dataSet->getTile(_level,_tileX,_tileY-1),_dataSet->getTile(_level,_tileX+1,_tileY-1),
+                      _dataSet->getTile(_level,_tileX+1,_tileY),_dataSet->getTile(_level,_tileX+1,_tileY+1),
+                      _dataSet->getTile(_level,_tileX,_tileY+1),_dataSet->getTile(_level,_tileX-1,_tileY+1));
     }
 }
 
@@ -1846,8 +1846,8 @@ DataSet::CompositeDestination* DataSet::createDestinationGraph(osgTerrain::Coord
     tile->_cs = cs;
     tile->_extents = extents;
     tile->_level = currentLevel;
-    tile->_X = currentX;
-    tile->_Y = currentY;
+    tile->_tileX = currentX;
+    tile->_tileY = currentY;
     tile->setMaximumImagerySize(maxImageSize,maxImageSize);
     tile->setMaximumTerrainSize(maxTerrainSize,maxTerrainSize);
     tile->computeMaximumSourceResolution(_sourceGraph.get());
diff --git a/examples/osgdem/DataSet.h b/examples/osgdem/DataSet.h
index 36a899d46..78ace039a 100644
--- a/examples/osgdem/DataSet.h
+++ b/examples/osgdem/DataSet.h
@@ -699,8 +699,8 @@ class DataSet : public osg::Referenced
             float                                       _terrain_maxSourceResolutionY;
             
             unsigned int                                _level;
-            unsigned int                                _X;
-            unsigned int                                _Y;
+            unsigned int                                _tileX;
+            unsigned int                                _tileY;
 
         };
 
@@ -744,7 +744,7 @@ class DataSet : public osg::Referenced
         
         void insertTileToQuadMap(DestinationTile* tile)
         {
-            _quadMap[tile->_level][tile->_X][tile->_Y] = tile;
+            _quadMap[tile->_level][tile->_tileX][tile->_tileY] = tile;
         }
         
         DestinationTile* getTile(unsigned int level,unsigned int X, unsigned int Y)