ENH: MANTIS-1071 Added otb::DEMHandler::ClearDEMs() method.

Modules/Adapters/OSSIMAdapters/include/otbDEMHandler.h

@@ -132,6 +132,11 @@ public:
   /** Get Goid file */
   std::string GetGeoidFile() const;
 
+  /**
+   * Removes all the ossimElevationDatabases from the ossimElevManager.
+   */
+  void ClearDEMs();
+
 protected:
   DEMHandler();
   virtual ~DEMHandler() {}

Modules/Adapters/OSSIMAdapters/src/otbDEMHandler.cxx

@@ -62,8 +62,7 @@ void
 DEMHandler
 ::OpenDEMDirectory(const char* DEMDirectory)
 {
-  ossimFilename ossimDEMDir;
-  ossimDEMDir = ossimFilename(DEMDirectory);
+  ossimFilename ossimDEMDir( DEMDirectory );
 
   if (!m_ElevManager->loadElevationPath(ossimDEMDir))
     {
@@ -87,6 +86,18 @@ DEMHandler
     }
 }
 
+
+void
+DEMHandler
+::ClearDEMs()
+{
+  assert( ossimElevManager::instance()!=NULL );
+  assert( m_ElevManager!=NULL );
+
+  ossimElevManager::instance()->clear();
+}
+
+
 void
 DEMHandler
 ::OpenDEMDirectory(const std::string& DEMDirectory)