ossimTiledElevationDatabase.h

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//----------------------------------------------------------------------------
//
// File: ossimTiledElevationDatabase.h
// 
// License:  MIT
// 
// See LICENSE.txt file in the top level directory for more details.
//
// Author:  David Burken
//
// Description: See description for class below.
//
//----------------------------------------------------------------------------
// $Id$

#ifndef ossimTiledElevationDatabase_HEADER
#define ossimTiledElevationDatabase_HEADER 1

#include <ossim/elevation/ossimElevationDatabase.h>
#include <ossim/base/ossimFileProcessorInterface.h>
#include <ossim/base/ossimGrect.h>
#include <ossim/base/ossimRefPtr.h>
#include <ossim/base/ossimRtti.h>
#include <vector>

class ossimDblGrid;
class ossimFilename;
class ossimFileWalker;
class ossimImageData;
class ossimImageGeometry;
class ossimImageHandler;
class ossimProjection;
class ossimSingleImageChain;
class ossimString;

class OSSIM_DLL ossimTiledElevationDatabase :
   public ossimElevationDatabase, public ossimFileProcessorInterface
{
public:

   ossimTiledElevationDatabase();

   virtual bool open(const ossimString& connectionString);

   virtual void close();

   void mapRegion(const ossimGrect& region);

   virtual double getHeightAboveMSL(const ossimGpt& gpt);

   virtual double getHeightAboveEllipsoid(const ossimGpt&);
   
   virtual bool pointHasCoverage(const ossimGpt& gpt) const;


   virtual bool loadState(const ossimKeywordlist& kwl, const char* prefix=0);

   virtual bool saveState(ossimKeywordlist& kwl, const char* prefix=0)const;
   
   bool getAccuracyInfo(ossimElevationAccuracyInfo& info, const ossimGpt& /*gpt*/) const
   {
      info.makeNan();
      
      return false;
   }
   
   virtual void processFile(const ossimFilename& file);
   
   virtual std::ostream& print(std::ostream& out) const;

   virtual ossimObject* dup() const
   {
      ossimTiledElevationDatabase* duped = new ossimTiledElevationDatabase;
      duped->open(m_connectionString);
      return duped;
   }

protected:
   virtual ~ossimTiledElevationDatabase();

private:

   // Private container to hold bounding rect and image handler.
   struct ossimTiledElevationEntry
   {
      ossimTiledElevationEntry();

      ossimTiledElevationEntry(const ossimGrect& rect,
                               ossimRefPtr<ossimSingleImageChain> sic );

      ossimGrect m_rect;

      ossimRefPtr<ossimSingleImageChain> m_sic;
   };

   void addEntry(const ossimTiledElevationEntry& entry);

   void initializeReferenceProjection();

   bool isDirectoryBasedImage(ossimRefPtr<ossimImageHandler> ih);

   bool isCompatible(ossimImageHandler* ih,
                     ossimImageGeometry* geom,
                     ossimProjection* proj) const;

   void getBoundingRect(ossimRefPtr<ossimImageGeometry> geom, ossimGrect& boundingRect) const;

   void mapRegion();

   template <class T> void fillGrid(T dummyTemplate, ossimRefPtr<ossimImageData> data);

   ossimTiledElevationDatabase(const ossimTiledElevationDatabase& copy_this);

   std::vector<ossimTiledElevationEntry> m_entries;

   ossimDblGrid* m_grid;

   ossimRefPtr<ossimProjection> m_referenceProj;

   ossimGrect m_requestedRect;
   ossimGrect m_entryListRect;
   ossimGrect m_mappedRect; // Requested expanded to even post boundary.

   ossimFileWalker* m_fileWalker;

   TYPE_DATA 
};

#endif /* ossimTiledElevationDatabase_HEADER */