org.geolatte.geom.crs

Class Ellipsoid

java.lang.Object

org.geolatte.geom.crs.CrsIdentifiable

org.geolatte.geom.crs.Ellipsoid

public class Ellipsoid
extends CrsIdentifiable

An ellipsoid.

An ellipsoid is an approximation of the Earth's surface as a squashed sphere. A common synonym is "spheroid". (See [CTS-1.00], p. 22-23.)

Field Summary

Fields

Modifier and Type	Field and Description
private double	inverseFlattening
private double	semiMajorAxis

Constructor Summary

Constructors

Constructor and Description
Ellipsoid(CrsId crsId, java.lang.String name, double semiMajorAxis, double inverseFlattening) constructs an instance

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
double	getInverseFlattening() Returns the inverse flattening.
double	getSemiMajorAxis() Returns the semi-major axis of this Ellipsoid.
int	hashCode()

Methods inherited from class org.geolatte.geom.crs.CrsIdentifiable

getCrsId, getName

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

semiMajorAxis

private final double semiMajorAxis

inverseFlattening

private final double inverseFlattening

Constructor Detail

Ellipsoid

public Ellipsoid(CrsId crsId,
                 java.lang.String name,
                 double semiMajorAxis,
                 double inverseFlattening)

constructs an instance

Parameters:

crsId - the identifier for this Ellipsoid

name - the commonly used name for this Ellipsoid

semiMajorAxis - the semi-major axis

inverseFlattening -

Method Detail

getSemiMajorAxis

public double getSemiMajorAxis()

Returns the semi-major axis of this Ellipsoid.

The semi-major axis is the equatorial radius in meters. [CTS-1.00], p. 61

Returns:

the semi-major axis.

getInverseFlattening

public double getInverseFlattening()

Returns the inverse flattening.

The inverse flattening is related to the equatorial/polar radius by the formula ivf=re/(re-rp). For perfect spheres, this formula breaks down, and a special IVF value of zero is used. [CTS-1.00], p.61

Returns:

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class CrsIdentifiable

hashCode

public int hashCode()

Overrides:

hashCode in class CrsIdentifiable