ilog.views.maps.projection
Class IlvEckert4Projection

java.lang.Object
  ilog.views.maps.projection.IlvProjection
      ilog.views.maps.projection.IlvEckert4Projection

All Implemented Interfaces:

IlvPersistentObject, Serializable

public class IlvEckert4Projection
extends IlvProjection

This class defines the Eckert IV projection. This projection is a pseudocylindrical projection.

This projection only supports spherical ellipsoids and implements an inverse function.

This projection is Equal Area.

Since:

JViews 5.0

See Also:

Serialized Form

Field Summary

Fields inherited from class ilog.views.maps.projection.IlvProjection

CONFORMAL, EQUAL_AREA, NONE

Constructor Summary

IlvEckert4Projection()
Creates an instance of the class IlvEckert4Projection.

IlvEckert4Projection(IlvEckert4Projection source)
Creates a new IlvEckert4Projection by copying an existing one.

IlvEckert4Projection(IlvInputStream stream)
Reads the object from an IlvInputStream.

Method Summary

IlvProjection	copy() Copies the projection.
void	setEllipsoid(IlvEllipsoid ellipsoid) Sets the ellipsoid used for the projection ellipsoid.
protected void	sForward(IlvCoordinate ll) Implements the projection for a sphere.
protected void	sInverse(IlvCoordinate xy) Implements the inverse projection for a sphere.
String	toString() Converts the projection to a string with Evenden's format.
void	write(IlvOutputStream stream) Writes the object to an IlvOutputStream.

Methods inherited from class ilog.views.maps.projection.IlvProjection

addDescription, adjustLongitude, eForward, eInverse, equals, forward, forward, getCentralMeridian, getCentralParallel, getDatum, getEllipsoid, getFalseEasting, getFalseNorthing, GetProjection, getProperty, getUnit, getXYOffset, inverse, inverse, inverse, isEllipsoidEnabled, isGeocentric, isInverseEnabled, isUsingLongitudeReduction, setCentralMeridian, setCentralParallel, setDatum, setFalseEasting, setFalseNorthing, setGeocentric, setLLCenter, setUnit, setUsingLongitudeReduction, setXYOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

IlvEckert4Projection

public IlvEckert4Projection()

Creates an instance of the class IlvEckert4Projection.

IlvEckert4Projection

public IlvEckert4Projection(IlvInputStream stream)
                     throws IlvReadFileException

Reads the object from an IlvInputStream.

Parameters:

stream - The input stream.

Throws:

IlvReadFileException - If the format is not correct.

IlvEckert4Projection

public IlvEckert4Projection(IlvEckert4Projection source)

Creates a new IlvEckert4Projection by copying an existing one.

Parameters:

source - The graphic object that is copied.

Method Detail

copy

public IlvProjection copy()

Copies the projection.

Specified by:

copy in class IlvProjection

Returns:

A copy of the projection.

sForward

protected void sForward(IlvCoordinate ll)

Implements the projection for a sphere.

Specified by:

sForward in class IlvProjection

Parameters:

ll - The longitude/latitude coordinates in radians (x = longitude, y = latitude).

sInverse

protected void sInverse(IlvCoordinate xy)
                 throws IlvToleranceConditionException

Implements the inverse projection for a sphere.

Overrides:

sInverse in class IlvProjection

Parameters:

xy - The Cartesian coordinates.

Throws:

IlvToleranceConditionException - If the values are not within the tolerated limits.

See Also:

IlvProjection.inverse(ilog.views.IlvPoint), IlvProjection.isInverseEnabled()

setEllipsoid

public void setEllipsoid(IlvEllipsoid ellipsoid)

Sets the ellipsoid used for the projection ellipsoid. This function also updates the projection parameters for the given ellipsoid.

Overrides:

setEllipsoid in class IlvProjection

Parameters:

ellipsoid - The ellipsoid.

See Also:

IlvEllipsoid

write

public void write(IlvOutputStream stream)
           throws IOException

Writes the object to an IlvOutputStream.

Specified by:

write in interface IlvPersistentObject

Overrides:

write in class IlvProjection

Parameters:

stream - The output stream.

Throws:

IOException - thrown when an exception occurs during the write operation for this object.

toString

public String toString()

Converts the projection to a string with Evenden's format.

Overrides:

toString in class Object