geoid_grid.h

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#ifndef dted_geoid_grid_H_
#define dted_geoid_grid_H_

#include "dted/dtedDefines.h"

#include <string>
#include <vector>

class DT_DLL_dted Dt_geoid_grid
{
public:
   // data type we're storing
   typedef double value_type;    
   // index into array of value_types
   typedef unsigned int index_type;

   Dt_geoid_grid();
   Dt_geoid_grid(std::string const & filename);

   bool load(std::string const & filename);
   void unload();
   bool loaded() const;

   bool load_ascii_grid(std::string const & filename);
   
   value_type value_at_index(index_type ilat, index_type ilon) const;
   value_type get_value(value_type lat, value_type lon) const;

   std::string print_values(value_type lat, value_type lon) const;

   index_type lat_index(value_type lat) const;
   index_type lon_index(value_type lon) const;

private:
   value_type minlat_, maxlat_, minlon_, maxlon_;
   value_type latspacing_, lonspacing_;
   index_type latbands_, lonbands_;
   std::vector<value_type> data_;
};

#endif