ossimVanDerGrintenProjection.h

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//*******************************************************************
//
// License:  See top level LICENSE.txt file.
// 
// Author:  Garrett Potts (gpotts@imagelinks.com)
//
// Description:
//
// Calls Grinten projection code.  
//*******************************************************************
//  $Id: ossimVanDerGrintenProjection.h 17815 2010-08-03 13:23:14Z dburken $
#ifndef ossimVanDerGrintenProjection_HEADER
#define ossimVanDerGrintenProjection_HEADER

#include <ossim/projection/ossimMapProjection.h>

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

   void setDefaults();

   void setCentralMeridian(double centralMeridian);

   double getFalseEasting()const{return  Grin_False_Easting;}
   double getFalseNorthing()const{return Grin_False_Northing;}
   
   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0)const;

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

   virtual bool operator==(const ossimProjection& projection) const;

protected:

   //________________GEOTRANS_____________
   
   
   mutable double Grin_a;                      /* Semi-major axis of ellipsoid in meters */
   mutable double Grin_f;              /* Flattening of ellipsoid */
   mutable double es2;             /* Eccentricity (0.08181919084262188000) squared         */
   mutable double es4;              /* es2 * es2 */
   mutable double es6;              /* es4 * es2 */
   mutable double Ra;                    /* Spherical Radius */
   mutable double PI_Ra;                  
   
   mutable double Grin_Origin_Long;                  /* Longitude of origin in radians    */
   mutable double Grin_False_Easting;
   mutable double Grin_False_Northing;
/* Van Der Grinten projection Parameters */
   
  long Set_Van_der_Grinten_Parameters(double a,
                                      double f,
                                      double Central_Meridian,
                                      double False_Easting,
                                      double False_Northing);



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



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


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

TYPE_DATA
};

#endif