ossimAlbersProjection.h

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//*******************************************************************
// Copyright (C) 2000 ImageLinks Inc.
//
// License:  See top level LICENSE.txt file.
//
// Author:  Garrett Potts
//
// Description:
//
// Calls Geotrans Albers projection code.  
//*******************************************************************
//  $Id: ossimAlbersProjection.h 17815 2010-08-03 13:23:14Z dburken $

#ifndef ossimAlbersProjection_HEADER
#define ossimAlbersProjection_HEADER
#include <ossim/projection/ossimMapProjection.h>


class OSSIMDLLEXPORT ossimAlbersProjection : public ossimMapProjection
{
public:
   ossimAlbersProjection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(),
                         const ossimGpt& origin = ossimGpt());
   
   ossimAlbersProjection(const ossimEllipsoid& ellipsoid,
                         const ossimGpt& origin,
                         double stdParallel1,
                         double stdParallel2,
                         double falseEasting,
                         double falseNorthing);
   
   ossimObject *dup()const;
   
   virtual ossimDpt forward(const ossimGpt &worldPoint)    const;
   virtual ossimGpt inverse(const ossimDpt &projectedPoint)const;
   virtual void update();

   void setStandardParallel1(double degree);

   void setStandardParallel2(double degree);

   void setStandardParallels(double parallel1Degree,
                             double prallel2Degree);

   void setFalseEasting(double falseEasting);

   void setFalseNorthing(double falseNorthing);

   void setFalseEastingNorthing(double falseEasting, double falseNorthing);

   void setParameters(double parallel1,
                      double parallel2,
                      double falseEasting,
                      double falseNorthing);

   virtual double getStandardParallel1() const;

   virtual double getStandardParallel2() const;
   
   void setDefaults();

   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:
   virtual ~ossimAlbersProjection();


   //________________________GEOTRANS__________________________
   //
   mutable double Albers_a;                   /* Semi-major axis of ellipsoid in meters */
   mutable double Albers_f;           /* Flattening of ellipsoid */
   mutable double es;            /* Eccentricity of ellipsoid */
   mutable double es2;            /* Eccentricity squared         */
   mutable double C;                     /* constant c   */
   mutable double rho0;                 /* height above ellipsoid       */
   mutable double n;                    /* ratio between meridians      */
   mutable double Albers_a_OVER_n;      /* Albers_a / n */
   mutable double one_MINUS_es2;        /* 1 - es2 */
   mutable double two_es;               /* 2 * es */
   
/* Albers Projection Parameters */
   mutable double Albers_Origin_Lat;    /* Latitude of origin in radians     */
   mutable double Albers_Origin_Long;               /* Longitude of origin in radians    */
   mutable double Albers_Std_Parallel_1;
   mutable double Albers_Std_Parallel_2;
   mutable double Albers_False_Easting;
   mutable double Albers_False_Northing;
   
   mutable double Albers_Delta_Northing;
   mutable double Albers_Delta_Easting;
   
   long Set_Albers_Parameters(double a,
                             double f,
                             double Origin_Latitude,
                             double Central_Meridian,
                             double Std_Parallel_1,
                             double Std_Parallel_2,
                             double False_Easting,
                             double False_Northing);


  void Get_Albers_Parameters(double *a,
                             double *f,
                             double *Origin_Latitude,
                             double *Central_Meridian,
                             double *Std_Parallel_1,
                             double *Std_Parallel_2,
                             double *False_Easting,
                             double *False_Northing)const;



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



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


   
/*
 * RTTI information defined in data_types/rtti.h
 */
TYPE_DATA
};

#endif