Object/Developer/_lambert_azimuthal_equal_area_8h_source.html

#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