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

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    00001 // CLASSIFICATION: UNCLASSIFIED
    00002
    00003 #ifndef Orthographic_H
    00004 #define Orthographic_H
    00005
    00006 /***************************************************************************/
    00007 /* RSC IDENTIFIER: ORTHOGRAPHIC
    00008  *
    00009  * ABSTRACT
    00010  *
    00011  *    This component provides conversions between Geodetic coordinates
    00012  *    (latitude and longitude in radians) and Orthographic projection
    00013  *    coordinates (easting and northing in meters).  The Orthographic
    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  *          ORTH_NO_ERROR           : No errors occurred in function
    00026  *          ORTH_LAT_ERROR          : Latitude outside of valid range
    00027  *                                      (-90 to 90 degrees)
    00028  *          ORTH_LON_ERROR          : Longitude outside of valid range
    00029  *                                      (-180 to 360 degrees)
    00030  *          ORTH_EASTING_ERROR      : Easting outside of valid range
    00031  *                                      (False_Easting +/- ~6,500,000 m,
    00032  *                                       depending on ellipsoid parameters)
    00033  *          ORTH_NORTHING_ERROR     : Northing outside of valid range
    00034  *                                      (False_Northing +/- ~6,500,000 m,
    00035  *                                       depending on ellipsoid parameters)
    00036  *          ORTH_RADIUS_ERROR       : Coordinates too far from pole,
    00037  *                                      depending on ellipsoid and
    00038  *                                      projection parameters
    00039  *          ORTH_ORIGIN_LAT_ERROR   : Origin latitude outside of valid range
    00040  *                                      (-90 to 90 degrees)
    00041  *          ORTH_CENT_MER_ERROR     : Central meridian outside of valid range
    00042  *                                      (-180 to 360 degrees)
    00043  *          ORTH_A_ERROR            : Semi-major axis less than or equal to zero
    00044  *          ORTH_INV_F_ERROR        : Inverse flattening outside of valid range
    00045  *                                                                                        (250 to 350)
    00046  *
    00047  * REUSE NOTES
    00048  *
    00049  *    ORTHOGRAPHIC is intended for reuse by any application that performs a
    00050  *    Orthographic projection or its inverse.
    00051  *
    00052  * REFERENCES
    00053  *
    00054  *    Further information on ORTHOGRAPHIC can be found in the Reuse Manual.
    00055  *
    00056  *    ORTHOGRAPHIC originated from :  U.S. Army Topographic Engineering Center
    00057  *                                Geospatial Information Division
    00058  *                                7701 Telegraph Road
    00059  *                                Alexandria, VA  22310-3864
    00060  *
    00061  * LICENSES
    00062  *
    00063  *    None apply to this component.
    00064  *
    00065  * RESTRICTIONS
    00066  *
    00067  *    ORTHOGRAPHIC has no restrictions.
    00068  *
    00069  * ENVIRONMENT
    00070  *
    00071  *    ORTHOGRAPHIC was tested and certified in the following environments:
    00072  *
    00073  *    1. Solaris 2.5 with GCC, version 2.8.1
    00074  *    2. Windows 95 with MS Visual C++, version 6
    00075  *
    00076  * MODIFICATIONS
    00077  *
    00078  *    Date              Description
    00079  *    ----              -----------
    00080  *    06-15-99          Original Code
    00081  *    03-05-07          Original C++ Code
    00082  *
    00083  */
    00084
    00085
    00086 #include "CoordinateSystem.h"
    00087
    00088
    00089 namespace MSP
    00090 {
    00091   namespace CCS
    00092   {
    00093     class MapProjection4Parameters;
    00094     class MapProjectionCoordinates;
    00095     class GeodeticCoordinates;
    00096
    00097
    00098     /***************************************************************************/
    00099     /*
    00100      *                              DEFINES
    00101      */
    00102
    00103     class Orthographic : public CoordinateSystem
    00104     {
    00105     public:
    00106
    00107       /*
    00108        * The constructor receives the ellipsoid parameters and
    00109        * projection parameters as inputs, and sets the corresponding state
    00110        * variables.  If any errors occur, an exception is thrown with a description
    00111        * of the error.
    00112        *
    00113        *    ellipsoidSemiMajorAxis  : Semi-major axis of ellipsoid, in meters   (input)
    00114        *    ellipsoidFlattening     : Flattening of ellipsoid                                                   (input)
    00115        *    centralMeridian         : Longitude in radians at the center of     (input)
    00116        *                              the projection
    00117        *    originLatitude          : Latitude in radians at which the          (input)
    00118        *                              point scale factor is 1.0
    00119        *    falseEasting            : A coordinate value in meters assigned to the
    00120        *                              central meridian of the projection.       (input)
    00121        *    falseNorthing           : A coordinate value in meters assigned to the
    00122        *                              origin latitude of the projection         (input)
    00123        */
    00124
    00125             Orthographic( double ellipsoidSemiMajorAxis, double ellipsoidFlattening, double centralMeridian, double originLatitude, double falseEasting, double falseNorthing );
    00126
    00127
    00128       Orthographic( const Orthographic &o );
    00129
    00130
    00131             ~Orthographic( void );
    00132
    00133
    00134       Orthographic& operator=( const Orthographic &o );
    00135
    00136
    00137       /*
    00138        * The function getParameters returns the current ellipsoid
    00139        * parameters and Orthographic projection parameters.
    00140        *
    00141        *    ellipsoidSemiMajorAxis  : Semi-major axis of ellipsoid, in meters   (output)
    00142        *    ellipsoidFlattening     : Flattening of ellipsoid                                                   (output)
    00143        *    centralMeridian         : Longitude in radians at the center of     (output)
    00144        *                              the projection
    00145        *    originLatitude          : Latitude in radians at which the          (output)
    00146        *                              point scale factor is 1.0
    00147        *    falseEasting            : A coordinate value in meters assigned to the
    00148        *                              central meridian of the projection.       (output)
    00149        *    falseNorthing           : A coordinate value in meters assigned to the
    00150        *                              origin latitude of the projection         (output)
    00151        */
    00152
    00153       MapProjection4Parameters* getParameters() const;
    00154
    00155
    00156       /*
    00157        * The function convertFromGeodetic converts geodetic (latitude and
    00158        * longitude) coordinates to Orthographic projection (easting and northing)
    00159        * coordinates, according to the current ellipsoid and Orthographic projection
    00160        * parameters.  If any errors occur, an exception is thrown with a description
    00161        * of the error.
    00162        *
    00163        *    longitude         : Longitude (lambda) in radians       (input)
    00164        *    latitude          : Latitude (phi) in radians           (input)
    00165        *    easting           : Easting (X) in meters               (output)
    00166        *    northing          : Northing (Y) in meters              (output)
    00167        */
    00168
    00169       MSP::CCS::MapProjectionCoordinates* convertFromGeodetic( MSP::CCS::GeodeticCoordinates* geodeticCoordinates );
    00170
    00171
    00172       /*
    00173        * The function convertToGeodetic converts Orthographic projection
    00174        * (easting and northing) coordinates to geodetic (latitude and longitude)
    00175        * coordinates, according to the current ellipsoid and Orthographic projection
    00176        * coordinates.  If any errors occur, an exception is thrown with a description
    00177        * of the error.
    00178        *
    00179        *    easting           : Easting (X) in meters                  (input)
    00180        *    northing          : Northing (Y) in meters                 (input)
    00181        *    longitude         : Longitude (lambda) in radians          (output)
    00182        *    latitude          : Latitude (phi) in radians              (output)
    00183        */
    00184
    00185       MSP::CCS::GeodeticCoordinates* convertToGeodetic( MSP::CCS::MapProjectionCoordinates* mapProjectionCoordinates );
    00186
    00187     private:
    00188
    00189       /* Ellipsoid Parameters, default to WGS 84 */
    00190       double es2;             /* Eccentricity (0.08181919084262188000) squared         */
    00191       double es4;             /* es2 * es2 */
    00192       double es6;             /* es4 * es2 */
    00193       double Ra;              /* Spherical Radius */
    00194
    00195       /* Orthographic projection Parameters */
    00196       double Orth_Origin_Lat;                   /* Latitude of origin in radians     */
    00197       double Orth_Origin_Long;                  /* Longitude of origin in radians    */
    00198       double Orth_False_Easting;
    00199       double Orth_False_Northing;
    00200       double Sin_Orth_Origin_Lat;               /* sin(Orth_Origin_Lat) */
    00201       double Cos_Orth_Origin_Lat;               /* cos(Orth_Origin_Lat) */
    00202
    00203     };
    00204   }
    00205 }
    00206
    00207 #endif
    00208
    00209
    00210 // CLASSIFICATION: UNCLASSIFIED