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

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    00001 // CLASSIFICATION: UNCLASSIFIED
    00002
    00003 #ifndef EquidistantCylindrical_H
    00004 #define EquidistantCylindrical_H
    00005
    00006 /***************************************************************************/
    00007 /* RSC IDENTIFIER: EQUIDISTANT CYLINDRICAL
    00008  *
    00009  * ABSTRACT
    00010  *
    00011  *    This component provides conversions between Geodetic coordinates
    00012  *    (latitude and longitude in radians) and Equidistant Cylindrical projection coordinates
    00013  *    (easting and northing in meters).  The Equidistant Cylindrical
    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  *          EQCY_NO_ERROR           : No errors occurred in function
    00026  *          EQCY_LAT_ERROR          : Latitude outside of valid range
    00027  *                                      (-90 to 90 degrees)
    00028  *          EQCY_LON_ERROR          : Longitude outside of valid range
    00029  *                                      (-180 to 360 degrees)
    00030  *          EQCY_EASTING_ERROR      : Easting outside of valid range
    00031  *                                      (False_Easting +/- ~20,000,000 m,
    00032  *                                       depending on ellipsoid parameters
    00033  *                                       and Standard Parallel)
    00034  *          EQCY_NORTHING_ERROR     : Northing outside of valid range
    00035  *                                      (False_Northing +/- 0 to ~10,000,000 m,
    00036  *                                       depending on ellipsoid parameters
    00037  *                                       and Standard Parallel)
    00038  *          EQCY_STDP_ERROR         : Standard parallel outside of valid range
    00039  *                                      (-90 to 90 degrees)
    00040  *          EQCY_CENT_MER_ERROR     : Central meridian outside of valid range
    00041  *                                      (-180 to 360 degrees)
    00042  *          EQCY_A_ERROR            : Semi-major axis less than or equal to zero
    00043  *          EQCY_INV_F_ERROR        : Inverse flattening outside of valid range
    00044  *                                      (250 to 350)
    00045  *
    00046  * REUSE NOTES
    00047  *
    00048  *    EQUIDISTANT CYLINDRICAL is intended for reuse by any application that performs a
    00049  *    Equidistant Cylindrical projection or its inverse.
    00050  *
    00051  * REFERENCES
    00052  *
    00053  *    Further information on EQUIDISTANT CYLINDRICAL can be found in the Reuse Manual.
    00054  *
    00055  *    EQUIDISTANT CYLINDRICAL originated from :  U.S. Army Topographic Engineering Center
    00056  *                                Geospatial Information Division
    00057  *                                7701 Telegraph Road
    00058  *                                Alexandria, VA  22310-3864
    00059  *
    00060  * LICENSES
    00061  *
    00062  *    None apply to this component.
    00063  *
    00064  * RESTRICTIONS
    00065  *
    00066  *    EQUIDISTANT CYLINDRICAL has no restrictions.
    00067  *
    00068  * ENVIRONMENT
    00069  *
    00070  *    EQUIDISTANT CYLINDRICAL was tested and certified in the following environments:
    00071  *
    00072  *    1. Solaris 2.5 with GCC 2.8.1
    00073  *    2. MS Windows with MS Visual C++ 6
    00074  *
    00075  * MODIFICATIONS
    00076  *
    00077  *    Date              Description
    00078  *    ----              -----------
    00079  *    04-16-99          Original Code
    00080  *    03-06-07          Original C++ Code
    00081  *
    00082  *
    00083  */
    00084
    00085
    00086 #include "CoordinateSystem.h"
    00087
    00088
    00089 namespace MSP
    00090 {
    00091   namespace CCS
    00092   {
    00093     class EquidistantCylindricalParameters;
    00094     class MapProjectionCoordinates;
    00095     class GeodeticCoordinates;
    00096
    00097
    00098     /***************************************************************************/
    00099     /*
    00100      *                              DEFINES
    00101      */
    00102
    00103     class EquidistantCylindrical : public CoordinateSystem
    00104     {
    00105     public:
    00106
    00107       /*
    00108        * The function setParameters receives the ellipsoid parameters and
    00109        * projection parameters as inputs, and sets the corresponding state
    00110        * variables.  It also calculates the spherical radius of the sphere having
    00111        * the same area as the ellipsoid.  If any errors occur, an exception is thrown with a description
    00112        * of the error.
    00113        *
    00114        *    ellipsoidSemiMajorAxis  : Semi-major axis of ellipsoid, in meters   (input)
    00115        *    ellipsoidFlattening     : Flattening of ellipsoid                   (input)
    00116        *    centralMeridian         : Longitude in radians at the center of     (input)
    00117        *                              the projection
    00118        *    standardParallel        : Latitude in radians at which the          (input)
    00119        *                              point scale factor is 1.0
    00120        *    falseEasting            : A coordinate value in meters assigned to the
    00121        *                              central meridian of the projection.       (input)
    00122        *    falseNorthing           : A coordinate value in meters assigned to the
    00123        *                              standard parallel of the projection       (input)
    00124        */
    00125
    00126             EquidistantCylindrical( double ellipsoidSemiMajorAxis, double ellipsoidFlattening, double centralMeridian, double standardParallel, double falseEasting, double falseNorthing );
    00127
    00128
    00129       EquidistantCylindrical( const EquidistantCylindrical &ec );
    00130
    00131
    00132             ~EquidistantCylindrical( void );
    00133
    00134
    00135       EquidistantCylindrical& operator=( const EquidistantCylindrical &ec );
    00136
    00137
    00138       /*
    00139        * The function getParameters returns the current ellipsoid
    00140        * parameters and Equidistant Cylindrical projection parameters.
    00141        *
    00142        *    ellipsoidSemiMajorAxis  : Semi-major axis of ellipsoid, in meters   (output)
    00143        *    ellipsoidFlattening     : Flattening of ellipsoid                   (output)
    00144        *    centralMeridian         : Longitude in radians at the center of     (output)
    00145        *                              the projection
    00146        *    standardParallel        : Latitude in radians at which the          (output)
    00147        *                              point scale factor is 1.0
    00148        *    falseEasting            : A coordinate value in meters assigned to the
    00149        *                              central meridian of the projection.       (output)
    00150        *    falseNorthing           : A coordinate value in meters assigned to the
    00151        *                              standard parallel of the projection       (output)
    00152        */
    00153
    00154       EquidistantCylindricalParameters* getParameters() const;
    00155
    00156
    00157       /*
    00158        * The function convertFromGeodetic converts geodetic (latitude and
    00159        * longitude) coordinates to Equidistant Cylindrical projection (easting and northing)
    00160        * coordinates, according to the current ellipsoid, spherical radiius
    00161        * and Equidistant Cylindrical projection parameters.
    00162        * If any errors occur, an exception is thrown with a description
    00163        * of the error.
    00164        *
    00165        *    longitude         : Longitude (lambda) in radians       (input)
    00166        *    latitude          : Latitude (phi) in radians           (input)
    00167        *    easting           : Easting (X) in meters               (output)
    00168        *    northing          : Northing (Y) in meters              (output)
    00169        */
    00170
    00171       MSP::CCS::MapProjectionCoordinates* convertFromGeodetic( MSP::CCS::GeodeticCoordinates* geodeticCoordinates );
    00172
    00173
    00174       /*
    00175        * The function convertToGeodetic converts Equidistant Cylindrical projection
    00176        * (easting and northing) coordinates to geodetic (latitude and longitude)
    00177        * coordinates, according to the current ellipsoid, spherical radius
    00178        * and Equidistant Cylindrical projection coordinates.
    00179        * If any errors occur, an exception is thrown with a description
    00180        * of the error.
    00181        *
    00182        *    easting           : Easting (X) in meters                  (input)
    00183        *    northing          : Northing (Y) in meters                 (input)
    00184        *    longitude         : Longitude (lambda) in radians          (output)
    00185        *    latitude          : Latitude (phi) in radians              (output)
    00186        */
    00187
    00188       MSP::CCS::GeodeticCoordinates* convertToGeodetic( MSP::CCS::MapProjectionCoordinates* mapProjectionCoordinates );
    00189
    00190     private:
    00191
    00192       /* Ellipsoid Parameters, default to WGS 84 */
    00193       double es2;               /* Eccentricity (0.08181919084262188000) squared         */
    00194       double es4;               /* es2 * es2  */
    00195       double es6;               /* es4 * es2  */
    00196       double Ra;                /* Spherical Radius  */
    00197
    00198       /* Equidistant Cylindrical projection Parameters */
    00199       double Eqcy_Std_Parallel;             /* Latitude of standard parallel in radians     */
    00200       double Cos_Eqcy_Std_Parallel;         /* cos(Eqcy_Std_Parallel)  */
    00201       double Eqcy_Origin_Long;              /* Longitude of origin in radians    */
    00202       double Eqcy_False_Easting;
    00203       double Eqcy_False_Northing;
    00204       double Eqcy_Delta_Northing;
    00205       double Eqcy_Max_Easting;
    00206       double Eqcy_Min_Easting;
    00207       double Ra_Cos_Eqcy_Std_Parallel;      /* Ra * Cos_Eqcy_Std_Parallel */
    00208
    00209     };
    00210   }
    00211 }
    00212
    00213 #endif
    00214
    00215
    00216 // CLASSIFICATION: UNCLASSIFIED