static int  IsAngularParameter( const char * );
    static int  IsLongitudeParameter( const char * );
    static int  IsLinearParameter( const char * );

    /** Albers Conic Equal Area */
    OGRErr      SetACEA( double dfStdP1, double dfStdP2,
                         double dfCenterLat, double dfCenterLong,
                         double dfFalseEasting, double dfFalseNorthing );
    
    /** Azimuthal Equidistant */
    OGRErr      SetAE( double dfCenterLat, double dfCenterLong,
                       double dfFalseEasting, double dfFalseNorthing );

    /** Bonne */
    OGRErr      SetBonne( double dfStdP1, double dfCentralMeridian,
                          double dfFalseEasting, double dfFalseNorthing );
    
    /** Cylindrical Equal Area */
    OGRErr      SetCEA( double dfStdP1, double dfCentralMeridian,
                        double dfFalseEasting, double dfFalseNorthing );

    /** Cassini-Soldner */
    OGRErr      SetCS( double dfCenterLat, double dfCenterLong,
                       double dfFalseEasting, double dfFalseNorthing );

    /** Equidistant Conic */
    OGRErr      SetEC( double dfStdP1, double dfStdP2,
                       double dfCenterLat, double dfCenterLong,
                       double dfFalseEasting, double dfFalseNorthing );

    /** Eckert IV */
    OGRErr      SetEckertIV( double dfCentralMeridian,
                             double dfFalseEasting, double dfFalseNorthing );

    /** Eckert VI */
    OGRErr      SetEckertVI( double dfCentralMeridian,
                             double dfFalseEasting, double dfFalseNorthing );

    /** Equirectangular */
    OGRErr      SetEquirectangular(double dfCenterLat, double dfCenterLong,
                            double dfFalseEasting, double dfFalseNorthing );

    /** Geostationary Satellite */
    OGRErr      SetGEOS( double dfCentralMeridian, double dfSatelliteHeight, 
                         double dfFalseEasting, double dfFalseNorthing );

    /** Goode Homolosine */
    OGRErr      SetGH( double dfCentralMeridian, 
                       double dfFalseEasting, double dfFalseNorthing );

    /** Gall Stereograpic */
    OGRErr      SetGS( double dfCentralMeridian,
                       double dfFalseEasting, double dfFalseNorthing );
    
    /** Gnomonic */
    OGRErr      SetGnomonic(double dfCenterLat, double dfCenterLong,
                            double dfFalseEasting, double dfFalseNorthing );

    OGRErr      SetHOM( double dfCenterLat, double dfCenterLong,
                        double dfAzimuth, double dfRectToSkew,
                        double dfScale,
                        double dfFalseEasting, double dfFalseNorthing );

    OGRErr      SetHOM2PNO( double dfCenterLat,
                            double dfLat1, double dfLong1,
                            double dfLat2, double dfLong2,
                            double dfScale,
                            double dfFalseEasting, double dfFalseNorthing );

    /** Krovak Oblique Conic Conformal */
    OGRErr      SetKrovak( double dfCenterLat, double dfCenterLong,
                           double dfAzimuth, double dfPseudoStdParallelLat,
                           double dfScale, 
                           double dfFalseEasting, double dfFalseNorthing );

    /** Lambert Azimuthal Equal-Area */
    OGRErr      SetLAEA( double dfCenterLat, double dfCenterLong,
                         double dfFalseEasting, double dfFalseNorthing );

    /** Lambert Conformal Conic */
    OGRErr      SetLCC( double dfStdP1, double dfStdP2,
                        double dfCenterLat, double dfCenterLong,
                        double dfFalseEasting, double dfFalseNorthing );

    /** Lambert Conformal Conic 1SP */
    OGRErr      SetLCC1SP( double dfCenterLat, double dfCenterLong,
                           double dfScale,
                           double dfFalseEasting, double dfFalseNorthing );

    /** Lambert Conformal Conic (Belgium) */
    OGRErr      SetLCCB( double dfStdP1, double dfStdP2,
                         double dfCenterLat, double dfCenterLong,
                         double dfFalseEasting, double dfFalseNorthing );
    
    /** Miller Cylindrical */
    OGRErr      SetMC( double dfCenterLat, double dfCenterLong,
                       double dfFalseEasting, double dfFalseNorthing );

    /** Mercator */
    OGRErr      SetMercator( double dfCenterLat, double dfCenterLong,
                             double dfScale, 
                             double dfFalseEasting, double dfFalseNorthing );

    OGRErr      SetMercator2SP( double dfStdP1,
                                double dfCenterLat, double dfCenterLong,
                                double dfFalseEasting, double dfFalseNorthing );

    /** Mollweide */
    OGRErr      SetMollweide( double dfCentralMeridian,
                              double dfFalseEasting, double dfFalseNorthing );

    /** New Zealand Map Grid */
    OGRErr      SetNZMG( double dfCenterLat, double dfCenterLong,
                         double dfFalseEasting, double dfFalseNorthing );

    /** Oblique Stereographic */
    OGRErr      SetOS( double dfOriginLat, double dfCMeridian,
                       double dfScale,
                       double dfFalseEasting,double dfFalseNorthing);
    
    /** Orthographic */
    OGRErr      SetOrthographic( double dfCenterLat, double dfCenterLong,
                                 double dfFalseEasting,double dfFalseNorthing);

    /** Polyconic */
    OGRErr      SetPolyconic( double dfCenterLat, double dfCenterLong,
                              double dfFalseEasting, double dfFalseNorthing );

    /** Polar Stereographic */
    OGRErr      SetPS( double dfCenterLat, double dfCenterLong,
                       double dfScale,
                       double dfFalseEasting, double dfFalseNorthing);
    
    /** Robinson */
    OGRErr      SetRobinson( double dfCenterLong, 
                             double dfFalseEasting, double dfFalseNorthing );
    
    /** Sinusoidal */
    OGRErr      SetSinusoidal( double dfCenterLong, 
                               double dfFalseEasting, double dfFalseNorthing );
    
    /** Stereographic */
    OGRErr      SetStereographic( double dfCenterLat, double dfCenterLong,
                                  double dfScale,
                                 double dfFalseEasting,double dfFalseNorthing);

    /** Swiss Oblique Cylindrical */
    OGRErr      SetSOC( double dfLatitudeOfOrigin, double dfCentralMeridian,
                        double dfFalseEasting, double dfFalseNorthing );
    
    /** Transverse Mercator */
    OGRErr      SetTM( double dfCenterLat, double dfCenterLong,
                       double dfScale,
                       double dfFalseEasting, double dfFalseNorthing );

    /** Transverse Mercator variants. */
    OGRErr      SetTMVariant( const char *pszVariantName, 
                              double dfCenterLat, double dfCenterLong,
                              double dfScale,
                              double dfFalseEasting, double dfFalseNorthing );

    /** Tunesia Mining Grid  */
    OGRErr      SetTMG( double dfCenterLat, double dfCenterLong, 
                        double dfFalseEasting, double dfFalseNorthing );

    /** Transverse Mercator (South Oriented) */
    OGRErr      SetTMSO( double dfCenterLat, double dfCenterLong,
                         double dfScale,
                         double dfFalseEasting, double dfFalseNorthing );

    /** Two Point Equidistant */
    OGRErr      SetTPED( double dfLat1, double dfLong1, 
                         double dfLat2, double dfLong2, 
                         double dfFalseEasting, double dfFalseNorthing );
    
    /** VanDerGrinten */
    OGRErr      SetVDG( double dfCenterLong,
                        double dfFalseEasting, double dfFalseNorthing );

    /** Universal Transverse Mercator */
    OGRErr      SetUTM( int nZone, int bNorth = TRUE );
    int         GetUTMZone( int *pbNorth = NULL ) const;

    /** State Plane */
    OGRErr      SetStatePlane( int nZone, int bNAD83 = TRUE,
                               const char *pszOverrideUnitName = NULL,
                               double dfOverrideUnit = 0.0 );
};

/************************************************************************/
/*                     OGRCoordinateTransformation                      */
/*                                                                      */
/*      This is really just used as a base class for a private          */
/*      implementation.                                                 */
/************************************************************************/

/**
 * Object for transforming between coordinate systems.
 *
 * Also, see OGRCreateSpatialReference() for creating transformations.
 */
 
class CPL_DLL OGRCoordinateTransformation
{
public:
    virtual ~OGRCoordinateTransformation() {}

    // From CT_CoordinateTransformation

    /** Fetch internal source coordinate system. */
    virtual OGRSpatialReference *GetSourceCS() = 0;

    /** Fetch internal target coordinate system. */
    virtual OGRSpatialReference *GetTargetCS() = 0;

    // From CT_MathTransform

    /**
     * Transform points from source to destination space.
     *
     * This method is the same as the C function OCTTransform().
     *
     * The method TransformEx() allows extended success information to 
     * be captured indicating which points failed to transform. 
     *
     * @param nCount number of points to transform.
     * @param x array of nCount X vertices, modified in place.
     * @param y array of nCount Y vertices, modified in place.
     * @param z array of nCount Z vertices, modified in place.
     * @return TRUE on success, or FALSE if some or all points fail to
     * transform.
     */
    virtual int Transform( int nCount, 
                           double *x, double *y, double *z = NULL ) = 0;

    /**
     * Transform points from source to destination space.
     *
     * This method is the same as the C function OCTTransformEx().
     *
     * @param nCount number of points to transform.
     * @param x array of nCount X vertices, modified in place.
     * @param y array of nCount Y vertices, modified in place.
     * @param z array of nCount Z vertices, modified in place.
     * @param pabSuccess array of per-point flags set to TRUE if that point 
     * transforms, or FALSE if it does not.
     *
     * @return TRUE if some or all points transform successfully, or FALSE if 
     * if none transform.
     */
    virtual int TransformEx( int nCount, 
                             double *x, double *y, double *z = NULL,
                             int *pabSuccess = NULL ) = 0;

};

OGRCoordinateTransformation CPL_DLL *
OGRCreateCoordinateTransformation( OGRSpatialReference *poSource, 
                                   OGRSpatialReference *poTarget );

#endif /* ndef _OGR_SPATIALREF_H_INCLUDED */