LambertAzimuthalEqualArea.h

#ifndef LambertAzimuthalEqualArea_h
#define LambertAzimuthalEqualArea_h
 
/* SPDX-License-Identifier: CC0-1.0 */
#include "TProjection.h"
 
namespace Isis {
  class Pvl;
  class PvlGroup;
  class LambertAzimuthalEqualArea : public TProjection {
    public:
      LambertAzimuthalEqualArea(Pvl &label, bool allowDefaults = false);
      ~LambertAzimuthalEqualArea();
      bool operator== (const Projection &proj);
 
      QString Name() const;
      QString Version() const;
      double TrueScaleLatitude() const;
      // since this projection is not cylindrical the following method does not
      // need to be be overwritten, returning false by default 
      // virtual bool IsEquatorialCylindrical();
 
      bool SetGround(const double lat, const double lon);
      bool SetCoordinate(const double x, const double y);
      bool XYRange(double &minX, double &maxX, double &minY, double &maxY);
 
      PvlGroup Mapping();
      PvlGroup MappingLatitudes();
      PvlGroup MappingLongitudes();
 
      // Unused methods as of June 2012 - See comments in LambertAzimuthalEqualArea.cpp
      double relativeScaleFactorLongitude() const;
      double relativeScaleFactorLatitude() const;
 
    private:
      void init(double centerLatitude, double centerLongitude);
      void initEllipsoid(); 
      bool setGroundEllipsoid(double phi, double lambda); 
      bool setCoordinateEllipsoid(const double x, const double y);
      bool xyRangeLambertAzimuthalPolar(double &minX, double &maxX, 
                                        double &minY, double &maxY); 
      void checkLongitude(double longitude);
      void validateRelativeScaleFactor() const;
 
      // projection flags
      bool m_spherical;        
      bool m_northPolarAspect; 
      bool m_southPolarAspect; 
      bool m_equatorialAspect; 
      // Snyder variables
      double m_a;         
      double m_e;         
      double m_lambda0;   
      double m_phi1;      
      double m_sinPhi1;   
      double m_cosPhi1;   
 
      // The following Snyder variables are only needed if we implement the 
      // ellipsoidal projection
      double m_qp;        
      double m_q1;        
      double m_m1;        
      double m_beta1;     
      double m_sinBeta1;  
      double m_cosBeta1;  
      double m_Rq;        
      double m_D;         
      double m_h; 
      double m_k; 
  };
};
 
#endif