ossimStereographicProjection.h

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

#ifndef ossimStereographicProjection_HEADER
#define ossimStereographicProjection_HEADER

#include <ossim/projection/ossimMapProjection.h>

class OSSIMDLLEXPORT ossimStereographicProjection : public ossimMapProjection
{
public:   
   ossimStereographicProjection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(),
                            const ossimGpt& origin = ossimGpt());
   ossimStereographicProjection(const ossimEllipsoid& ellipsoid,
                            const ossimGpt& origin,
                            const double falseEasting,
                            const double falseNorthing);
   ~ossimStereographicProjection(){}
   virtual ossimObject *dup()const
      {
         return new ossimStereographicProjection(*this);
      }
   
   virtual void update();
   virtual ossimGpt inverse(const ossimDpt &eastingNorthing)const;
   virtual ossimDpt forward(const ossimGpt &latLon)const;

   void setFalseEasting(double falseEasting);

   void setFalseNorthing(double falseNorthing);

   void setFalseEastingNorthing(double falseEasting, double falseNorthing);

   void setDefaults();

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

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

/************************************************************************/
/*                           GLOBAL DECLARATIONS
 *
 */
/* Ellipsoid Parameters, default to WGS 84  */
mutable double Stereo_a;                    /* Semi-major axis of ellipsoid, in meters  */
mutable double Stereo_f;            /* Flattening of ellipsoid  */
mutable double Stereo_Ra;             /* Spherical Radius */
mutable double Two_Stereo_Ra;        /* 2 * Spherical Radius */
mutable long   Stereo_At_Pole;                        /* Flag variable */

/* Stereographic projection Parameters */
mutable double Stereo_Origin_Lat;                 /* Latitude of origin, in radians */
mutable double Stereo_Origin_Long;                /* Longitude of origin, in radians */
mutable double Stereo_False_Easting;              /* False easting, in meters */
mutable double Stereo_False_Northing;             /* False northing, in meters */
mutable double Sin_Stereo_Origin_Lat;             /* sin(Stereo_Origin_Lat) */
mutable double Cos_Stereo_Origin_Lat;             /* cos(Stereo_Origin_Lat) */

/* Maximum variance for easting and northing values for WGS 84. */
mutable double Stereo_Delta_Easting;
mutable double Stereo_Delta_Northing;

long Set_Stereographic_Parameters (double a,
                                   double f,
                                   double Origin_Latitude,
                                   double Central_Meridian,
                                   double False_Easting,
                                   double False_Northing);

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

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

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

TYPE_DATA
};

#endif