/usr/include/ossim/projection/ossimEckert6Projection.h is in libossim-dev 1.7.21-4.
This file is owned by root:root, with mode 0o644.
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//
// License: See top level LICENSE.txt file.
//
// Author: Garrett Potts
//
// Description:
//
// Calls Geotrans Eckert6 projection code.
//*******************************************************************
// $Id: ossimEckert6Projection.h 9968 2006-11-29 14:01:53Z gpotts $
#ifndef ossimEckert6Projection_HEADER
#define ossimEckert6Projection_HEADER
#include <ossim/projection/ossimMapProjection.h>
class ossimEckert6Projection : public ossimMapProjection
{
public:
ossimEckert6Projection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(),
const ossimGpt& origin = ossimGpt());
ossimEckert6Projection(const ossimEllipsoid& ellipsoid,
const ossimGpt& origin,
double falseEasting,
double falseNorthing);
~ossimEckert6Projection(){}
virtual ossimObject *dup()const{return new ossimEckert6Projection(*this);}
virtual ossimGpt inverse(const ossimDpt &eastingNorthing)const;
virtual ossimDpt forward(const ossimGpt &latLon)const;
virtual void update();
/*!
* SetFalseEasting. The value is in meters.
* Update is then called so we can pre-compute paramters
*/
void setFalseEasting(double falseEasting);
/*!
* SetFalseNorthing. The value is in meters.
* Update is then called so we can pre-compute paramters
*/
void setFalseNorthing(double falseNorthing);
/*!
* Sets both false easting and northing values. The values are
* expected to be in meters.
* Update is then called so we can pre-compute paramters
*/
void setFalseEastingNorthing(double falseEasting, double falseNorthing);
double getFalseEasting()const{return Eck6_False_Easting;}
double getFalseNorthing()const{return Eck6_False_Northing;}
/*!
* Initialize all pramters to default and calls update for
* pre-computations.
*/
void setDefaults();
/*!
* Method to save the state of an object to a keyword list.
* Return true if ok or false on error.
*/
virtual bool saveState(ossimKeywordlist& kwl,
const char* prefix=0)const;
/*!
* Method to the load (recreate) the state of an object from a keyword
* list. Return true if ok or false on error.
*/
virtual bool loadState(const ossimKeywordlist& kwl,
const char* prefix=0);
private:
//__________________GEOTRANS STUFF____________________
mutable double Eck6_a; /* Semi-major axis of ellipsoid in meters */
mutable double Eck6_f; /* Flattening of ellipsoid */
mutable double es2; /* Eccentricity (0.08181919084262188000) squared */
mutable double es4; /* es2 * es2 */
mutable double es6; /* es4 * es2 */
mutable double Ra_Over_Sqrt_Two_Plus_PI; /* Ra(6371007.1810824)/Sqrt(2.0 + PI) */
mutable double Inv_Ra_Over_Sqrt_Two_Plus_PI; /* Sqrt(2.0 + PI)/Ra(6371007.1810824) */
/* Eckert6 projection Parameters */
mutable double Eck6_Origin_Long; /* Longitude of origin in radians */
mutable double Eck6_False_Easting;
mutable double Eck6_False_Northing;
mutable double Eck6_Delta_Northing;
mutable double Eck6_Max_Easting;
mutable double Eck6_Min_Easting;
/*!
* The function Set_Eckert6_Parameters receives the ellipsoid parameters and
* Eckert VI projection parameters as inputs, and sets the corresponding state
* variables. If any errors occur, the error code(s) are returned by the
* function, otherwise ECK6_NO_ERROR is returned.
*
* a : Semi-major axis of ellipsoid, in meters (input)
* f : Flattening of ellipsoid (input)
* Central_Meridian : Longitude in radians at the center of (input)
* the projection
* False_Easting : A coordinate value in meters assigned to the
* central meridian of the projection. (input)
* False_Northing : A coordinate value in meters assigned to the
* origin latitude of the projection (input)
*/
long Set_Eckert6_Parameters(double a,
double f,
double Central_Meridian,
double False_Easting,
double False_Northing);
/*!
* The function Get_Eckert6_Parameters returns the current ellipsoid
* parameters and Eckert VI projection parameters.
*
* a : Semi-major axis of ellipsoid, in meters (output)
* f : Flattening of ellipsoid (output)
* Central_Meridian : Longitude in radians at the center of (output)
* the projection
* False_Easting : A coordinate value in meters assigned to the
* central meridian of the projection. (output)
* False_Northing : A coordinate value in meters assigned to the
* origin latitude of the projection (output)
*/
void Get_Eckert6_Parameters(double *a,
double *f,
double *Central_Meridian,
double *False_Easting,
double *False_Northing)const;
/*!
* The function Convert_Geodetic_To_Eckert6 converts geodetic (latitude and
* longitude) coordinates to Eckert VI projection easting, and northing
* coordinates, according to the current ellipsoid and Eckert VI projection
* parameters. If any errors occur, the error code(s) are returned by the
* function, otherwise ECK6_NO_ERROR is returned.
*
* Latitude : Latitude (phi) in radians (input)
* Longitude : Longitude (lambda) in radians (input)
* Easting : Easting (X) in meters (output)
* Northing : Northing (Y) in meters (output)
*/
long Convert_Geodetic_To_Eckert6 (double Latitude,
double Longitude,
double *Easting,
double *Northing)const;
/*!
* The function Convert_Eckert6_To_Geodetic converts Eckert VI projection
* easting and northing coordinates to geodetic (latitude and longitude)
* coordinates, according to the current ellipsoid and Eckert VI projection
* coordinates. If any errors occur, the error code(s) are returned by the
* function, otherwise ECK6_NO_ERROR is returned.
*
* Easting : Easting (X) in meters (input)
* Northing : Northing (Y) in meters (input)
* Latitude : Latitude (phi) in radians (output)
* Longitude : Longitude (lambda) in radians (output)
*/
long Convert_Eckert6_To_Geodetic(double Easting,
double Northing,
double *Latitude,
double *Longitude)const;
TYPE_DATA
};
#endif
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