diff --git a/Code/Common/otbPolyLineParametricPathWithValue.h b/Code/Common/otbPolyLineParametricPathWithValue.h
index ad7b0d89ce7fa12504f5d5e80393903b7d143c78..fa4784abf24d33bd5c100a5f12a7d5acb720e222 100644
--- a/Code/Common/otbPolyLineParametricPathWithValue.h
+++ b/Code/Common/otbPolyLineParametricPathWithValue.h
@@ -93,13 +93,13 @@ template < class TValue,unsigned int VDimension=2>
    */
   virtual double GetLength() const;
 
-  void  AddVertex (const ContinuousIndexType &vertex);
+  virtual void  AddVertex (const ContinuousIndexType &vertex);
 
     /**
    * Compute the path bounding region.
    * \return The region.
    */
-  RegionType GetBoundingRegion(void) const;
+  virtual RegionType GetBoundingRegion(void) const;
 
 protected:
   /** Constructor */
diff --git a/Code/Common/otbRemoteSensingRegion.h b/Code/Common/otbRemoteSensingRegion.h
index ac691e26df47803813f83b0187f1337d34aeab0a..80a9b0ee95f72a1748ae2ea0d10fe2b287b88aa2 100644
--- a/Code/Common/otbRemoteSensingRegion.h
+++ b/Code/Common/otbRemoteSensingRegion.h
@@ -35,7 +35,8 @@ namespace otb
  * piece of an Image. The RemoteSensingRegion is represented with an index and
  * a size in each of the n-dimensions of the image. (The index is the
  * corner of the image, the size is the lengths of the image in each of
- * the topological directions.)
+ * the topological directions. <b>For this class, the notion of index and origin
+ * are the same.</b>)
  *
  * As the size and origin can be given in various system coordinates, they contain
  * double values (through the use of an itk::ContinuousIndex).
@@ -132,6 +133,18 @@ public:
     return m_Index;
     }
 
+  /** Set the index defining the corner of the region. */
+  void SetIndex(const IndexType &index)
+  {
+    m_Index = index;
+  }
+
+  /** Get index defining the corner of the region. */
+  const IndexType& GetIndex() const
+  {
+    return m_Index;
+  }
+
   /** Set the size of the region. This plus the index determines the
    * rectangular shape, or extent, of the region. */
   void SetSize(const SizeType &size)