ENH: Added otb::DEMHandler::GetDEMCount().

Modules/Adapters/OSSIMAdapters/include/otbDEMHandler.h

@@ -125,6 +125,10 @@ public:
   /** Set the default height above ellipsoid in case no information is available*/
   double GetDefaultHeightAboveEllipsoid() const;
 
+  /**
+   * @return The number of elevation databases in the <code>ossimElevManager</code>.
+   */
+  unsigned int GetDEMCount() const;
 
   /** Get DEM directory */
   std::string GetDEMDirectory(unsigned int idx = 0) const;

Modules/Adapters/OSSIMAdapters/src/otbDEMHandler.cxx

@@ -243,6 +243,15 @@ DEMHandler
   return m_DefaultHeightAboveEllipsoid;
 }
 
+unsigned int
+DEMHandler
+::GetDEMCount() const
+{
+  assert( ossimElevManager::instance()!=NULL );
+
+  return ossimElevManager::instance()->getNumberOfElevationDatabases();
+}
+
 std::string DEMHandler::GetDEMDirectory(unsigned int idx) const
 {
   std::string demDir = "";