Class RotatedPole

  • All Implemented Interfaces:
    Serializable, MathTransform, MathTransform2D

    public class RotatedPole
    extends MapProjection
    Rotated Pole Transformation for rotated spherical coordinates ("Rotated Pole Coordinates"), commonly used in numerical weather forecasting models.

    Key parameters: latitudeOfOrigin, centralMeridian - latitude/longitude of the rotated origin.

    Based on the code provided by J├╝rgen Seib (Deutscher Wetterdienst), adopted to follow "+proj=ob_tran" behaviour.

    For examples see "RotatedPole.txt" file in tests directory

    Since:
    15.0
    Author:
    Maciej Filocha (ICM UW)
    See Also:
    COSMO User Manual, Part 1, proj.4, Serialized Form
    • Method Detail

      • transformNormalized

        protected Point2D transformNormalized​(double x,
                                              double y,
                                              Point2D ptDst)
                                       throws ProjectionException
        Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
        Specified by:
        transformNormalized in class MapProjection
        Parameters:
        x - The longitude of the coordinate, in radians.
        y - The latitude of the coordinate, in radians.
        ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
        Returns:
        the coordinate point after transforming (lambda, phi) and storing the result in ptDst.
        Throws:
        ProjectionException - if the point can't be transformed.
      • inverseTransformNormalized

        protected Point2D inverseTransformNormalized​(double x,
                                                     double y,
                                                     Point2D ptDst)
                                              throws ProjectionException
        Transforms the specified (x,y) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
        Specified by:
        inverseTransformNormalized in class MapProjection
        Parameters:
        x - The easting of the coordinate, linear distance on a unit sphere or ellipse.
        y - The northing of the coordinate, linear distance on a unit sphere or ellipse.
        ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in radians.
        Returns:
        the coordinate point after transforming x, y and storing the result in ptDst.
        Throws:
        ProjectionException - if the point can't be transformed.