Class EckertIV

    • Method Detail

      • transformNormalized

        protected Point2D transformNormalized​(double lam,
                                              double phi,
                                              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:
        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.
      • inverseTransformNormalized

        protected Point2D inverseTransformNormalized​(double x,
                                                     double y,
                                                     Point2D ptDst)
                                              throws ProjectionException
        Transforms the specified (x,y) coordinates 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.
      • getToleranceForAssertions

        protected double getToleranceForAssertions​(double longitude,
                                                   double latitude)
        Description copied from class: MapProjection
        Maximal error (in metres) tolerated for assertions, if enabled. When assertions are enabled, every direct projection is followed by an inverse projection, and the result is compared to the original coordinate. If a distance greater than the tolerance level is found, then an ProjectionException will be thrown. Subclasses should override this method if they need to relax the tolerance level.
        Overrides:
        getToleranceForAssertions in class MapProjection
        Parameters:
        longitude - The longitude in decimal degrees.
        latitude - The latitude in decimal degrees.
        Returns:
        The tolerance level for assertions, in meters.