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# Y:/msp/devkits/temp_geotrans/master/geotrans3.1/CCS/src/dtcc/CoordinateSystems/grinten/VanDerGrinten.h

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    00001 // CLASSIFICATION: UNCLASSIFIED
    00002
    00003 #ifndef VanDerGrinten_H
    00004 #define VanDerGrinten_H
    00005
    00006 /***************************************************************************/
    00007 /* RSC IDENTIFIER: VAN DER GRINTEN
    00008  *
    00009  * ABSTRACT
    00010  *
    00011  *    This component provides conversions between Geodetic coordinates
    00012  *    (latitude and longitude in radians) and Van Der Grinten projection
    00013  *    coordinates (easting and northing in meters).  The Van Der Grinten
    00014  *    projection employs a spherical Earth model.  The Spherical Radius
    00015  *    used is the the radius of the sphere having the same area as the
    00016  *    ellipsoid.
    00017  *
    00018  * ERROR HANDLING
    00019  *
    00020  *    This component checks parameters for valid values.  If an invalid value
    00021  *    is found, the error code is combined with the current error code using
    00022  *    the bitwise or.  This combining allows multiple error codes to be
    00023  *    returned. The possible error codes are:
    00024  *
    00025  *          GRIN_NO_ERROR           : No errors occurred in function
    00026  *          GRIN_LAT_ERROR          : Latitude outside of valid range
    00027  *                                      (-90 to 90 degrees)
    00028  *          GRIN_LON_ERROR          : Longitude outside of valid range
    00029  *                                      (-180 to 360 degrees)
    00030  *          GRIN_EASTING_ERROR      : Easting outside of valid range
    00031  *                                      (False_Easting +/- ~20,000,000 m,
    00032  *                                       depending on ellipsoid parameters)
    00033  *          GRIN_NORTHING_ERROR     : Northing outside of valid range
    00034  *                                      (False_Northing +/- ~20,000,000 m,
    00035  *                                       depending on ellipsoid parameters)
    00036  *          GRIN_RADIUS_ERROR       : Coordinates too far from pole,
    00037  *                                      depending on ellipsoid and
    00038  *                                      projection parameters
    00039  *          GRIN_CENT_MER_ERROR     : Central meridian outside of valid range
    00040  *                                      (-180 to 360 degrees)
    00041  *          GRIN_A_ERROR            : Semi-major axis less than or equal to zero
    00042  *          GRIN_INV_F_ERROR        : Inverse flattening outside of valid range
    00043  *                                      (250 to 350)
    00044  *
    00045  * REUSE NOTES
    00046  *
    00047  *    VAN DER GRINTEN is intended for reuse by any application that performs a
    00048  *    Van Der Grinten projection or its inverse.
    00049  *
    00050  * REFERENCES
    00051  *
    00052  *    Further information on VAN DER GRINTEN can be found in the Reuse Manual.
    00053  *
    00054  *    VAN DER GRINTEN originated from :  U.S. Army Topographic Engineering Center
    00055  *                                Geospatial Information Division
    00056  *                                7701 Telegraph Road
    00057  *                                Alexandria, VA  22310-3864
    00058  *
    00059  * LICENSES
    00060  *
    00061  *    None apply to this component.
    00062  *
    00063  * RESTRICTIONS
    00064  *
    00065  *    VAN DER GRINTEN has no restrictions.
    00066  *
    00067  * ENVIRONMENT
    00068  *
    00069  *    VAN DER GRINTEN was tested and certified in the following environments:
    00070  *
    00071  *    1. Solaris 2.5 with GCC, version 2.8.1
    00072  *    2. Windows 95 with MS Visual C++, version 6
    00073  *
    00074  * MODIFICATIONS
    00075  *
    00076  *    Date              Description
    00077  *    ----              -----------
    00078  *    3-1-07          Original Code
    00079  *
    00080  */
    00081
    00082
    00083 #include "CoordinateSystem.h"
    00084
    00085
    00086 namespace MSP
    00087 {
    00088   namespace CCS
    00089   {
    00090     class MapProjection3Parameters;
    00091     class MapProjectionCoordinates;
    00092     class GeodeticCoordinates;
    00093
    00094
    00095     /***************************************************************************/
    00096     /*
    00097      *                              DEFINES
    00098      */
    00099
    00100     class VanDerGrinten : public CoordinateSystem
    00101     {
    00102     public:
    00103
    00104       /*
    00105        * The constructor receives the ellipsoid parameters and
    00106        * projection parameters as inputs, and sets the corresponding state
    00107        * variables.  If any errors occur, an exception is thrown with a description
    00108        * of the error.
    00109        *
    00110        *    ellipsoidSemiMajorAxis   : Semi-major axis of ellipsoid, in meters   (input)
    00111        *    ellipsoidFlattening      : Flattening of ellipsoid                   (input)
    00112        *    centralMeridian          : Longitude in radians at the center of     (input)
    00113        *                               the projection
    00114        *    falseEasting             : A coordinate value in meters assigned to the
    00115        *                               central meridian of the projection.       (input)
    00116        *    falseNorthing            : A coordinate value in meters assigned to the
    00117        *                               origin latitude of the projection         (input)
    00118        */
    00119
    00120             VanDerGrinten( double ellipsoidSemiMajorAxis, double ellipsoidFlattening, double centralMeridian, double falseEasting, double falseNorthing );
    00121
    00122
    00123       VanDerGrinten( const VanDerGrinten &v );
    00124
    00125
    00126             ~VanDerGrinten( void );
    00127
    00128
    00129       VanDerGrinten& operator=( const VanDerGrinten &v );
    00130
    00131
    00132       /*
    00133        * The function getParameters returns the current ellipsoid
    00134        * parameters, and Van Der Grinten projection parameters.
    00135        *
    00136        *    ellipsoidSemiMajorAxis     : Semi-major axis of ellipsoid, in meters   (output)
    00137        *    ellipsoidFlattening        : Flattening of ellipsoid                   (output)
    00138        *    centralMeridian            : Longitude in radians at the center of     (output)
    00139        *                                 the projection
    00140        *    falseEasting               : A coordinate value in meters assigned to the
    00141        *                                 central meridian of the projection.       (output)
    00142        *    falseNorthing              : A coordinate value in meters assigned to the
    00143        *                                 origin latitude of the projection         (output)
    00144        */
    00145
    00146       MapProjection3Parameters* getParameters() const;
    00147
    00148
    00149       /*
    00150        * The function convertFromGeodetic converts geodetic (latitude and
    00151        * longitude) coordinates to Van Der Grinten projection (easting and northing)
    00152        * coordinates, according to the current ellipsoid and Van Der Grinten projection
    00153        * parameters.  If any errors occur, an exception is thrown with a description
    00154        * of the error.
    00155        *
    00156        *    longitude         : Longitude (lambda) in radians       (input)
    00157        *    latitude          : Latitude (phi) in radians           (input)
    00158        *    easting           : Easting (X) in meters               (output)
    00159        *    northing          : Northing (Y) in meters              (output)
    00160        */
    00161
    00162       MSP::CCS::MapProjectionCoordinates* convertFromGeodetic( MSP::CCS::GeodeticCoordinates* geodeticCoordinates );
    00163
    00164
    00165       /*
    00166        * The function convertToGeodetic converts Grinten projection
    00167        * (easting and northing) coordinates to geodetic (latitude and longitude)
    00168        * coordinates, according to the current ellipsoid and Grinten projection
    00169        * coordinates.  If any errors occur, an exception is thrown with a description
    00170        * of the error.
    00171        *
    00172        *    easting           : Easting (X) in meters                  (input)
    00173        *    northing          : Northing (Y) in meters                 (input)
    00174        *    longitude         : Longitude (lambda) in radians          (output)
    00175        *    latitude          : Latitude (phi) in radians              (output)
    00176        */
    00177
    00178       MSP::CCS::GeodeticCoordinates* convertToGeodetic( MSP::CCS::MapProjectionCoordinates* mapProjectionCoordinates );
    00179
    00180     private:
    00181
    00182       /* Ellipsoid Parameters, default to WGS 84 */
    00183       double es2;              /* Eccentricity (0.08181919084262188000) squared         */
    00184       double es4;              /* es2 * es2 */
    00185       double es6;              /* es4 * es2 */
    00186       double Ra;               /* Spherical Radius */
    00187       double PI_Ra;
    00188
    00189       /* Van Der Grinten projection Parameters */
    00190       double Grin_Origin_Long;                  /* Longitude of origin in radians    */
    00191       double Grin_False_Easting;
    00192       double Grin_False_Northing;
    00193
    00194
    00195       double floatEq( double x, double v, double epsilon );
    00196     };
    00197   }
    00198 }
    00199
    00200 #endif
    00201
    00202
    00203 // CLASSIFICATION: UNCLASSIFIED