ossimSinusoidalProjection.h

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

#ifndef ossimSinusoidalProjection_HEADER
#define ossimSinusoidalProjection_HEADER

#include <ossim/projection/ossimMapProjection.h>

class OSSIMDLLEXPORT ossimSinusoidalProjection : public ossimMapProjection
{
public:
   ossimSinusoidalProjection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(),
                             const ossimGpt& origin = ossimGpt());
   
   ossimSinusoidalProjection(const ossimEllipsoid& ellipsoid,
                             const ossimGpt& origin,
                             const double falseEasting,
                             const double falseNorthing);
   
   ~ossimSinusoidalProjection(){}

   virtual ossimObject *dup()const{return new ossimSinusoidalProjection(*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  Sinu_False_Easting;}
   double getFalseNorthing()const{return Sinu_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;

private:

   //_______________________GEOTRANS________________________
   mutable double Sinu_a;                      /* Semi-major axis of ellipsoid in meters */
   mutable double Sinu_f;              /* Flattening of ellipsoid */
   mutable double es2;             /* Eccentricity (0.08181919084262188000) squared         */
   mutable double es4;              /* es2 * es2 */
   mutable double es6;              /* es4 * es2 */
   mutable double c0;           /* 1 - es2 / 4.0 - 3.0 * es4 / 64.0 - 5.0 * es6 / 256.0 */
   mutable double c1;     /* 3.0 * es2 / 8.0 + 3.0 * es4 / 32.0 + 45.0 * es6 / 1024.0 */
   mutable double c2;             /* 15.0 * es4 / 256.0 + 45.0 * es6 / 1024.0 */
   mutable double c3;               /* 35.0 * es6 / 3072.0 */
   mutable double a0;                  /* 3.0 * e1 / 2.0 - 27.0 * e3 / 32.0 */
   mutable double a1;               /* 21.0 * e2 / 16.0 - 55.0 * e4 / 32.0 */
   mutable double a2;               /* 151.0 * e3 / 96.0 */
   mutable double a3;               /* 1097.0 * e4 / 512.0 */
   
/* Sinusoid projection Parameters */
   mutable double Sinu_Origin_Long;      /* Longitude of origin in radians    */
   mutable double Sinu_False_Northing;   /* False northing in meters          */
   mutable double Sinu_False_Easting;    /* False easting in meters           */
   
/* Maximum variance for easting and northing values for WGS 84.
 */
   mutable double Sinu_Max_Easting;
   mutable double Sinu_Min_Easting;
   mutable double Sinu_Delta_Northing;   


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



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



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


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

TYPE_DATA
};

#endif