WAR : intialization of the attribute in the same order of declaration

Code/Projections/otbPhysicalToRPCSensorModelImageFilter.h

@@ -33,7 +33,7 @@ namespace otb {
  * CS.
  * 
  * The number of points used to estimate the rpc sensor model is
- * defined by the GridSpacing, note that at least 16 points are needed
+ * defined by the GridSize, note that at least 16 points are needed
  * to estimate a proper RPC sensor model, there are no warning when
  * the model estimated is inaccurate.
  *
@@ -44,7 +44,7 @@ namespace otb {
  * implementation.(TODO)
  *
  * Depending on the value of the DEMDirectory, an elevation fetched
- * from the SRT directory is used. 
+ * from the SRT directory is used.(TODO) 
  *
  * This filter does not modify the image buffer, but only the
  * metadata. Therefore, it is implemented as an InPlaceImageFilter.

Code/Projections/otbPhysicalToRPCSensorModelImageFilter.txx

@@ -29,12 +29,12 @@ PhysicalToRPCSensorModelImageFilter<TImage>
 {
   // Initialize the rpc estimator
   m_GCPsToSensorModelFilter = GCPsToSensorModelType::New();
-
-  // Initialize the gridSize
-  m_GridSize.Fill(1);
   
   // Initialize the DEMDirectory
   m_DEMDirectory = "";
+
+  // Initialize the gridSize
+  m_GridSize.Fill(1);
 }
 
 template <class TImage>
@@ -43,7 +43,6 @@ PhysicalToRPCSensorModelImageFilter<TImage>
 {
 }
 
-
 template <class TImage>
 void
 PhysicalToRPCSensorModelImageFilter<TImage>