Class CassiniSoldner

  • All Implemented Interfaces:
    Serializable, MathTransform, MathTransform2D

    public class CassiniSoldner
    extends MapProjection
    Cassini-Soldner Projection (EPSG code 9806). The Cassini-Soldner Projection is the ellipsoidal version of the Cassini projection for the sphere. It is not conformal but as it is relatively simple to construct it was extensively used in the last century and is still useful for mapping areas with limited longitudinal extent. It has now largely been replaced by the conformal Transverse Mercator which it resembles. Like this, it has a straight central meridian along which the scale is true, all other meridians and parallels are curved, and the scale distortion increases rapidly with increasing distance from the central meridian.
    See Also:
    Serialized Form
    • Method Detail

      • inverseTransformNormalized

        protected Point2D inverseTransformNormalized​(double x,
                                                     double y,
                                                     Point2D ptDst)
                                              throws ProjectionException
        Transforms the specified (x,y) coordinate and stores the result in ptDst.
        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.
      • transformNormalized

        protected Point2D transformNormalized​(double lam,
                                              double phi,
                                              Point2D ptDst)
                                       throws ProjectionException
        Transforms the specified (x,y) coordinate (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
        Specified by:
        transformNormalized in class MapProjection
        Parameters:
        lam - The longitude of the coordinate, in radians.
        phi - 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.