ossimEckert6Projection.h

Go to the documentation of this file.

//*******************************************************************
//
// License:  See top level LICENSE.txt file.
// 
// Author:  Garrett Potts
//
// Description:
//
// Calls Geotrans Eckert6 projection code.  
//*******************************************************************
//  $Id: ossimEckert6Projection.h 17815 2010-08-03 13:23:14Z dburken $

#ifndef ossimEckert6Projection_HEADER
#define ossimEckert6Projection_HEADER

#include <ossim/projection/ossimMapProjection.h>

class OSSIMDLLEXPORT ossimEckert6Projection : public ossimMapProjection
{
public:   
   ossimEckert6Projection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(),
                          const ossimGpt& origin = ossimGpt());
   ossimEckert6Projection(const ossimEllipsoid& ellipsoid,
                          const ossimGpt& origin,
                          double falseEasting,
                          double falseNorthing);
   ~ossimEckert6Projection(){}
   virtual ossimObject *dup()const{return new ossimEckert6Projection(*this);}

   virtual ossimGpt inverse(const ossimDpt &eastingNorthing)const;
   virtual ossimDpt forward(const ossimGpt &latLon)const;
   virtual void update();
   
   void setFalseEasting(double falseEasting);

   void setFalseNorthing(double falseNorthing);

   void setFalseEastingNorthing(double falseEasting, double falseNorthing);

   double getFalseEasting()const{return  Eck6_False_Easting;}
   double getFalseNorthing()const{return Eck6_False_Northing;}

   void setDefaults();

   void setCentralMeridian(double centralMeridian);

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

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

   //__________________GEOTRANS STUFF____________________
   
   mutable double Eck6_a;                      /* Semi-major axis of ellipsoid in meters */
   mutable double Eck6_f;              /* Flattening of ellipsoid */
   mutable double es2;             /* Eccentricity (0.08181919084262188000) squared         */
   mutable double es4;              /* es2 * es2    */
   mutable double es6;              /* es4 * es2  */
   mutable double Ra_Over_Sqrt_Two_Plus_PI;      /* Ra(6371007.1810824)/Sqrt(2.0 + PI) */
   mutable double Inv_Ra_Over_Sqrt_Two_Plus_PI; /* Sqrt(2.0 + PI)/Ra(6371007.1810824) */
   
   
/* Eckert6 projection Parameters */
   mutable double Eck6_Origin_Long;                         /* Longitude of origin in radians    */
   mutable double Eck6_False_Easting;
   mutable double Eck6_False_Northing;
   mutable double Eck6_Delta_Northing;
   mutable double Eck6_Max_Easting;
   mutable double Eck6_Min_Easting;

   
  long Set_Eckert6_Parameters(double a,
                              double f,
                              double Central_Meridian,
                              double False_Easting,
                              double False_Northing);


  void Get_Eckert6_Parameters(double *a,
                              double *f,
                              double *Central_Meridian,
                              double *False_Easting,
                              double *False_Northing)const;


  long Convert_Geodetic_To_Eckert6 (double Latitude,
                                    double Longitude,
                                    double *Easting,
                                    double *Northing)const;


  long Convert_Eckert6_To_Geodetic(double Easting,
                                   double Northing,
                                   double *Latitude,
                                   double *Longitude)const;


TYPE_DATA
};

#endif