ossimUsgsDemTileSource.h

Go to the documentation of this file.

//*******************************************************************
//
// License:  MIT
// 
// See LICENSE.txt file in the top level directory for more details.
//
// Description:
//
// Contains class declaration of ossimUsgsDemTileSource.
// The ossimUsgsDemTileSource class is derived from ossimImageHandler and
// is intended to be an image handler for USGS dem files.
//
//********************************************************************
// $Id: ossimUsgsDemTileSource.h 19640 2011-05-25 15:58:00Z oscarkramer $

#ifndef ossimUsgsDemTileSource_HEADER
#define ossimUsgsDemTileSource_HEADER

#include <ossim/imaging/ossimImageHandler.h>

class ossimImageData;
class ossimDemGrid;

class OSSIM_DLL ossimUsgsDemTileSource : public ossimImageHandler
{
public:
      
   ossimUsgsDemTileSource();

   virtual ossimString getShortName() const;
   virtual ossimString getLongName()  const;

   virtual bool open();

   virtual ossimRefPtr<ossimImageData> getTile(const  ossimIrect& tile_rect,
                                               ossim_uint32 resLevel=0);

   virtual bool getTile(ossimImageData* result, ossim_uint32 resLevel=0);
   
   virtual ossim_uint32 getNumberOfInputBands()  const;
   virtual ossim_uint32 getNumberOfOutputBands() const;
   
   virtual ossim_uint32 getNumberOfLines(ossim_uint32 reduced_res_level = 0) const;
   
   virtual ossim_uint32 getNumberOfSamples(ossim_uint32 reduced_res_level = 0) const;

   virtual double getNullPixelValue(ossim_uint32 band=0)const;
   virtual double getMinPixelValue(ossim_uint32 band=0)const;
   virtual double getMaxPixelValue(ossim_uint32 band=0)const;

   virtual ossimIrect getImageRectangle(ossim_uint32 reduced_res_level = 0) const;
   
   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0)const;
   
   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=0);
   
   
   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32 getTileWidth() const;

   virtual ossim_uint32 getTileHeight() const;

   virtual ossim_uint32 getImageTileWidth() const;

   virtual ossim_uint32 getImageTileHeight() const;   

   virtual bool isOpen()const;
   
   virtual ossimRefPtr<ossimImageGeometry> getImageGeometry();

protected:

   virtual ossimRefPtr<ossimImageGeometry> getInternalImageGeometry() const;
   
   virtual ~ossimUsgsDemTileSource();
   // Disallow operator= and copy constrution...
   const ossimUsgsDemTileSource& operator=(const  ossimUsgsDemTileSource& rhs);
   ossimUsgsDemTileSource(const ossimUsgsDemTileSource&);
   
   template <class T> bool fillBuffer(T, // dummy template variable
                                      const ossimIrect& tile_rect,
                                      const ossimIrect& clip_rect,
                                      ossimImageData* tile);

   void gatherStatistics();

   ossimDemGrid*               theDem;
   ossimRefPtr<ossimImageData> theTile;
   ossim_float64               theNullValue;
   ossim_float64               theMinHeight;
   ossim_float64               theMaxHeight;
   bool                        theFeetFlag;  // elevation units = feet
   bool                        theIsDemFlag;

   ossimScalarType             theScalarType;
   
TYPE_DATA
};

#endif  // #ifndef ossimUsgsDemTileSource_HEADER