ossimSrtmSupportData.h

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//----------------------------------------------------------------------------
// Copyright (c) 2005, David Burken, all rights reserved.
//
// License: MIT
// 
// See LICENSE.txt file in the top level directory for more details.
//
// Author:  David Burken
//
// Description:
// 
// Support data class for a Shuttle Radar Topography Mission (SRTM) file.
//
//----------------------------------------------------------------------------
// $Id$

#ifndef ossimSrtmSupportData_HEADER
#define ossimSrtmSupportData_HEADER 1

#include <ossim/base/ossimObject.h>
#include <ossim/base/ossimConstants.h>
#include <ossim/base/ossimFilename.h>
#include <ossim/base/ossimRefPtr.h>
#include <ossim/base/ossimIoStream.h>
#include <ossim/projection/ossimProjection.h>
#include <memory>

class OSSIMDLLEXPORT ossimSrtmSupportData : public ossimObject
{
public:
   ossimSrtmSupportData();

   virtual ~ossimSrtmSupportData();

   bool setFilename(const ossimFilename& srtmFile,
                    bool scanForMinMax = false);

   ossimFilename getFilename() const;

   ossim_uint32 getNumberOfLines() const;
   
   ossim_uint32 getNumberOfSamples() const;

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

   ossimRefPtr<ossimProjection> getProjection() const;

   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0) const;
   
   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=0);
   
   ossim_float64 getSouthwestLatitude() const;

   ossim_float64 getSouthwestLongitude() const;
   
   ossim_float64 getLatitudeSpacing() const;

   ossim_float64 getLongitudeSpacing() const;

   ossim_float64 getMinPixelValue() const;

   ossim_float64 getMaxPixelValue() const;

   ossimScalarType getScalarType()const;
   virtual std::ostream& print(std::ostream& out) const;

private:

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

   void clear();

   bool setCornerPoints();
   
   bool setSize();

   bool computeMinMax();
  
   ossimFilename m_file;
   ossim_uint32  m_numberOfLines;
   ossim_uint32  m_numberOfSamples;
   ossim_float64 m_southwestLatitude;  //< decimal degrees
   ossim_float64 m_southwestLongitude; //< decimal degrees
   ossim_float64 m_latSpacing;         //< decimal degrees
   ossim_float64 m_lonSpacing;         //< decimal degrees
   ossim_float64 m_minPixelValue;      //< meters
   ossim_float64 m_maxPixelValue;      //< meters

   ossimScalarType m_scalarType;

   // mutable ossimRefPtr<ossimIFStream> theFileStream;
   mutable std::shared_ptr<ossim::istream> m_str;
   
   template <class T>
   bool computeMinMaxTemplate(T dummy, double defaultNull);
};

#endif /* #ifndef ossimSrtmSupportData */