Package mccombe.mapping

Class Ellipsoid

  • public class Ellipsoid
extends java.lang.Object
    Ellipsoid is the base class used to describe the shape of the earth's surface. It is a biaxial ellipsoid, slightly flattened at the poles.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected Ellipsoid​(java.lang.String name, double major, double minor)
      Create an Ellipsoid with specified major and minor exes.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected double eccsq()
      The eccentricity squared for this Ellipsoid.
      double majoraxis()
      Major Axis (m) of the spheroid
      double minoraxis()
      Minor axis (m) of the spheroid
      java.lang.String toString()
      Provide a String identifying this Ellipsoid

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • AIRY

        public static final Ellipsoid AIRY
        The Airy Sphere 1830 - "best fit" Ellipsoid for Great Britain

      • CLARKE

        public static final Ellipsoid CLARKE
        The Clarke (1880) Ellipsoid. Used in France with the NTF Datum and Lambert Conformal Conical (LCC) projection

      • HAYFORD

        public static final Ellipsoid HAYFORD
        The Hayford (1909) Ellipsoid. Typically used with he European 1950 (ED50) Datum

      • GRS80

        public static final Ellipsoid GRS80
        The GRS80 Ellipsoid - "Best fit" ellipsoid for the whole Earth. Defined for Global Positioning System (GPS) and used with the WGS84 Datum.

      • MODIFIED_AIRY

        public static final Ellipsoid MODIFIED_AIRY
        The "Modified Airy" ellipsoid. The "best fit" Ellipsoid for Ireland and used with the Irish Grid.

      • BESSEL

        public static final Ellipsoid BESSEL
        The Bessel 1841 Ellipsoid. Used with the Austrian Grid

      • INTERNATIONAL

        public static final Ellipsoid INTERNATIONAL
        The Bessel 1841 Ellipsoid. Used with the Austrian Grid

    • Constructor Detail

      • Ellipsoid

        protected Ellipsoid​(java.lang.String name,
                    double major,
                    double minor)
        Create an Ellipsoid with specified major and minor exes.
        Parameters:
        name - Defines the name of this Ellipsoid
        major - Major axis (m)
        minor - Minor axis (m)

    • Method Detail

      • majoraxis

        public double majoraxis()
        Major Axis (m) of the spheroid
        Returns:
        The major axis of the Ellipsoid

      • minoraxis

        public double minoraxis()
        Minor axis (m) of the spheroid
        Returns:
        The minor axis (m) of the Ellipsoid

      • eccsq

        protected double eccsq()
        The eccentricity squared for this Ellipsoid.
        Returns:
        the eccentricity squared ( i.e. (a^2 - b^2)/(a^2)

      • toString

        public java.lang.String toString()
        Provide a String identifying this Ellipsoid
        Overrides:
        toString in class java.lang.Object
        Returns:
        The name of this Ellipsoid