ilog.views.maps.projection
Class IlvLambertAzimuthalEqualAreaProjection

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

All Implemented Interfaces:

IlvPersistentObject, Serializable

public class IlvLambertAzimuthalEqualAreaProjection
extends IlvProjection

This class defines the Lambert Azimuthal Equal Area projection. With Azimuthal projections, also called plane projections, the spherical globe is projected onto a plane surface.

The Lambert Azimuthal Equal Area projection is also known as:

• Lorgna
• Zenithal Equal Area
• Zenithal Equivalent

This projection applies both to spherical and non-spherical ellipsoids and implements an inverse function.

This projection is Equal Area.

See Also:

Serialized Form

Field Summary

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

CONFORMAL, EQUAL_AREA, NONE

Constructor Summary

IlvLambertAzimuthalEqualAreaProjection()
Creates an instance of the class IlvLambertAzimuthalEqualAreaProjection.

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

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

Method Summary

IlvProjection	copy() Copies the projection.
protected void	eForward(IlvCoordinate ll) Implements the projection for an ellipsoid.
protected void	eInverse(IlvCoordinate xy) Implements the inverse projection for an ellipsoid.
void	setEllipsoid(IlvEllipsoid ellipsoid) Sets the ellipsoid used for the projection.
void	setLLCenter(double lon, double lat) Specifies the central meridian and the central parallel associated with the projection and updates the internal parameters.
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, 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, setUnit, setUsingLongitudeReduction, setXYOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

IlvLambertAzimuthalEqualAreaProjection

public IlvLambertAzimuthalEqualAreaProjection()

Creates an instance of the class IlvLambertAzimuthalEqualAreaProjection.

IlvLambertAzimuthalEqualAreaProjection

public IlvLambertAzimuthalEqualAreaProjection(IlvInputStream stream)
                                       throws IlvReadFileException

Reads the object from an IlvInputStream.

Parameters:

stream - the input stream.

Throws:

IlvReadFileException - if the format is not correct.

Since:

JViews 3.0

IlvLambertAzimuthalEqualAreaProjection

public IlvLambertAzimuthalEqualAreaProjection(IlvLambertAzimuthalEqualAreaProjection source)

Creates a new IlvLambertAzimuthalEqualAreaProjection by copying an existing one.

Parameters:

source - the projection that is copied.

Since:

JViews 3.0

Method Detail

copy

public IlvProjection copy()

Copies the projection.

Specified by:

copy in class IlvProjection

Returns:

a copy of the projection.

Since:

JViews 3.0

sForward

protected void sForward(IlvCoordinate ll)
                 throws IlvToleranceConditionException

Implements the projection for a sphere.

Specified by:

sForward in class IlvProjection

Parameters:

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

Throws:

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

eForward

protected void eForward(IlvCoordinate ll)
                 throws IlvToleranceConditionException

Implements the projection for an ellipsoid.

Overrides:

eForward in class IlvProjection

Parameters:

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

Throws:

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

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()

eInverse

protected void eInverse(IlvCoordinate xy)
                 throws IlvToleranceConditionException

Implements the inverse projection for an ellipsoid.

Overrides:

eInverse 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.isEllipsoidEnabled(), IlvProjection.isInverseEnabled()

setEllipsoid

public void setEllipsoid(IlvEllipsoid ellipsoid)

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

Overrides:

setEllipsoid in class IlvProjection

Parameters:

ellipsoid - the ellipsoid

See Also:

IlvEllipsoid

setLLCenter

public void setLLCenter(double lon,
                        double lat)

Specifies the central meridian and the central parallel associated with the projection and updates the internal parameters. By default, the central parallel and the central meridian are set to 0.

Overrides:

setLLCenter in class IlvProjection

Parameters:

lon - the central meridian in radians.

lat - the central parallel in radians.

See Also:

IlvProjectionUtil.DegreeToRadian(double), IlvProjectionUtil.DMSToRadian(java.lang.String)

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.

Since:

JViews 3.0

toString

public String toString()

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

Overrides:

toString in class Object