//******************************************************************* // // License: See top level LICENSE.txt file. // // Author: Garrett Potts (gpotts@imagelinks.com) // // Description: // // Calls Geotrans Polyconic projection code. //******************************************************************* // $Id: ossimPolyconicProjection.h 17815 2010-08-03 13:23:14Z dburken $ #ifndef ossimPolyconicProjection_HEADER #define ossimPolyconicProjection_HEADER #include class OSSIMDLLEXPORT ossimPolyconicProjection : public ossimMapProjection { public: ossimPolyconicProjection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(), const ossimGpt& origin = ossimGpt()); ossimPolyconicProjection(const ossimEllipsoid& ellipsoid, const ossimGpt& origin, const double falseEasting, const double falseNorthing); ~ossimPolyconicProjection(){} virtual ossimObject *dup()const { return new ossimPolyconicProjection(*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); void setDefaults(); double getFalseEasting()const{return Poly_False_Easting;} double getFalseNorthing()const{return Poly_False_Northing;} /*! * 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: mutable double Poly_a; /* Semi-major axis of ellipsoid in meters */ mutable double Poly_f; /* Flattening of ellipsoid */ mutable double es2; /* Eccentricity (0.08181919084262188000) squared */ mutable double es4; /* es2 * es2 */ mutable double es6; /* es4 * es2 */ mutable double M0; mutable double c0; /* 1 - es2 / 4.0 - 3.0 * es4 / 64.0 - 5.0 * es6 / 256.0 */ mutable double c1; /* 3.0 * es2 / 8.0 + 3.0 * es4 / 32.0 + 45.0 * es6 / 1024.0 */ mutable double c2; /* 15.0 * es4 / 256.0 + 45.0 * es6 / 1024.0 */ mutable double c3; /* 35.0 * es6 / 3072.0 */ /* Polyconic projection Parameters */ mutable double Poly_Origin_Lat; /* Latitude of origin in radians */ mutable double Poly_Origin_Long; /* Longitude of origin in radians */ mutable double Poly_False_Northing; /* False northing in meters */ mutable double Poly_False_Easting; /* False easting in meters */ /* Maximum variance for easting and northing values for WGS 84. */ mutable double Poly_Max_Easting; mutable double Poly_Max_Northing; mutable double Poly_Min_Easting; mutable double Poly_Min_Northing; /*! * The function Set_Polyconic_Parameters receives the ellipsoid parameters and * Polyconic projcetion parameters as inputs, and sets the corresponding state * variables.If any errors * occur, the error code(s) are returned by the function, otherwise * POLY_NO_ERROR is returned. * * a : Semi-major axis of ellipsoid, in meters (input) * f : Flattening of ellipsoid (input) * Origin_Latitude : Latitude in radians at which the (input) * point scale factor is 1.0 * 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_Polyconic_Parameters(double a, double f, double Origin_Latitude, double Central_Meridian, double False_Easting, double False_Northing); /*! * The function Get_Polyconic_Parameters returns the current ellipsoid * parameters, and Polyconic projection parameters. * * a : Semi-major axis of ellipsoid, in meters (output) * f : Flattening of ellipsoid (output) * Origin_Latitude : Latitude in radians at which the (output) * point scale factor is 1.0 * 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_Polyconic_Parameters(double *a, double *f, double *Origin_Latitude, double *Central_Meridian, double *False_Easting, double *False_Northing)const; /*! * The function Convert_Geodetic_To_Polyconic converts geodetic (latitude and * longitude) coordinates to Polyconic projection easting, and northing * coordinates, according to the current ellipsoid and Polyconic projection * parameters. If any errors occur, the error code(s) are returned by the * function, otherwise POLY_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_Polyconic (double Latitude, double Longitude, double *Easting, double *Northing)const; /*! * The function Convert_Polyconic_To_Geodetic converts Polyconic projection * easting and northing coordinates to geodetic (latitude and longitude) * coordinates, according to the current ellipsoid and Polyconic projection * coordinates. If any errors occur, the error code(s) are returned by the * function, otherwise POLY_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_Polyconic_To_Geodetic(double Easting, double Northing, double *Latitude, double *Longitude)const; TYPE_DATA }; #endif