//******************************************************************* // // License: See top level LICENSE.txt file. // // Author: Garrett Potts (gpotts@imagelinks.com) // // Description: // // Calls Geotrans Transverse Mercator projection code. //******************************************************************* // $Id: ossimTransMercatorProjection.h 17815 2010-08-03 13:23:14Z dburken $ #ifndef ossimTransMercatorProjection_HEADER #define ossimTransMercatorProjection_HEADER #include class OSSIMDLLEXPORT ossimTransMercatorProjection : public ossimMapProjection { public: ossimTransMercatorProjection(const ossimEllipsoid& ellipsoid = ossimEllipsoid(6378137, 6356752.3142), const ossimGpt& origin = ossimGpt()); ossimTransMercatorProjection(const ossimEllipsoid& ellipsoid, const ossimGpt& origin, double falseEasting, double falseNorthing, double scaleFactor); ~ossimTransMercatorProjection(){} virtual ossimObject *dup()const{return new ossimTransMercatorProjection(*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); /* * Set's scale and then update. */ void setScaleFactor(double scaleFactor); /*! * 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 setParameters(double falseEasting, double falseNorthing, double scaleFactor); void setDefaults(); double getFalseEasting()const{return TranMerc_False_Easting;} double getFalseNorthing()const{return TranMerc_False_Northing;} double getScaleFactor()const{return TranMerc_Scale_Factor;} /*! * 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); /*! * Prints data members to stream. Returns stream&. */ virtual std::ostream& print(std::ostream& out) const; //! Returns TRUE if principal parameters are within epsilon tolerance. virtual bool operator==(const ossimProjection& projection) const; protected: //_____________GEOTRANS_______________ double TranMerc_a; /* Semi-major axis of ellipsoid i meters */ double TranMerc_f; /* Flattening of ellipsoid */ double TranMerc_es; /* Eccentricity (0.08181919084262188000) squared */ double TranMerc_ebs; /* Second Eccentricity squared */ /* Transverse_Mercator projection Parameters */ double TranMerc_Origin_Lat; /* Latitude of origin in radians */ double TranMerc_Origin_Long; /* Longitude of origin in radians */ double TranMerc_False_Northing; /* False northing in meters */ double TranMerc_False_Easting; /* False easting in meters */ double TranMerc_Scale_Factor; /* Scale factor */ /* Isometeric to geodetic latitude parameters, default to WGS 84 */ double TranMerc_ap; double TranMerc_bp; double TranMerc_cp; double TranMerc_dp; double TranMerc_ep; /* Maximum variance for easting and northing values for WGS 84. */ double TranMerc_Delta_Easting; double TranMerc_Delta_Northing; /*! * The function Set_Tranverse_Mercator_Parameters receives the ellipsoid * parameters and Tranverse Mercator projection parameters as inputs, and * sets the corresponding state variables. If any errors occur, the error * code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is * returned. * * a : Semi-major axis of ellipsoid, in meters (input) * f : Flattening of ellipsoid (input) * Origin_Latitude : Latitude in radians at the origin of the (input) * projection * Central_Meridian : Longitude in radians at the center of the (input) * projection * False_Easting : Easting/X at the center of the projection (input) * False_Northing : Northing/Y at the center of the projection (input) * Scale_Factor : Projection scale factor (input) */ long Set_Transverse_Mercator_Parameters(double a, double f, double Origin_Latitude, double Central_Meridian, double False_Easting, double False_Northing, double Scale_Factor); /*! * The function Get_Transverse_Mercator_Parameters returns the current * ellipsoid and Transverse Mercator projection parameters. * * a : Semi-major axis of ellipsoid, in meters (output) * f : Flattening of ellipsoid (output) * Origin_Latitude : Latitude in radians at the origin of the (output) * projection * Central_Meridian : Longitude in radians at the center of the (output) * projection * False_Easting : Easting/X at the center of the projection (output) * False_Northing : Northing/Y at the center of the projection (output) * Scale_Factor : Projection scale factor (output) */ void Get_Transverse_Mercator_Parameters(double *a, double *f, double *Origin_Latitude, double *Central_Meridian, double *False_Easting, double *False_Northing, double *Scale_Factor)const; /*! * The function Convert_Geodetic_To_Transverse_Mercator converts geodetic * (latitude and longitude) coordinates to Transverse Mercator projection * (easting and northing) coordinates, according to the current ellipsoid * and Transverse Mercator projection coordinates. If any errors occur, the * error code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is * returned. * * Latitude : Latitude in radians (input) * Longitude : Longitude in radians (input) * Easting : Easting/X in meters (output) * Northing : Northing/Y in meters (output) */ long Convert_Geodetic_To_Transverse_Mercator (double Latitude, double Longitude, double *Easting, double *Northing)const; /*! * The function Convert_Transverse_Mercator_To_Geodetic converts Transverse * Mercator projection (easting and northing) coordinates to geodetic * (latitude and longitude) coordinates, according to the current ellipsoid * and Transverse Mercator projection parameters. If any errors occur, the * error code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is * returned. * * Easting : Easting/X in meters (input) * Northing : Northing/Y in meters (input) * Latitude : Latitude in radians (output) * Longitude : Longitude in radians (output) */ long Convert_Transverse_Mercator_To_Geodetic (double Easting, double Northing, double *Latitude, double *Longitude)const; TYPE_DATA }; #endif