ilog.views.maps.projection
Class IlvGnomonicProjection

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

All Implemented Interfaces:

IlvPersistentObject, Serializable

public class IlvGnomonicProjection
extends IlvProjection

This class defines the Gnomonic projection. The Gnonomic projection is an azimuthal projection. Because of distortions with increasing distance from the center of the projection, this projection is used to show areas of less than a hemisphere.

This projection applies only to spherical ellipsoids and implements an inverse function.

This projection is neither conformal nor equal area.

Since:

JViews 3.5

See Also:

Serialized Form

Field Summary

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

CONFORMAL, EQUAL_AREA, NONE

Constructor Summary

IlvGnomonicProjection()
Initializes a new instance of the class IlvGnomonicProjection.

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

IlvGnomonicProjection(IlvInputStream stream)
Reads a new IlvGnomonicProjection from the specified stream.

Method Summary

IlvProjection	copy() Copies the projection.
void	setLLCenter(double lon, double lat) Specifies the central meridian and the central parallel associated with the projection.
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 this projection to the specified stream.

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, setEllipsoid, setFalseEasting, setFalseNorthing, setGeocentric, setUnit, setUsingLongitudeReduction, setXYOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

IlvGnomonicProjection

public IlvGnomonicProjection()

Initializes a new instance of the class IlvGnomonicProjection.

IlvGnomonicProjection

public IlvGnomonicProjection(IlvGnomonicProjection source)

Creates a new IlvGnomonicProjection by copying an existing one.

Parameters:

source - The projection that is copied.

IlvGnomonicProjection

public IlvGnomonicProjection(IlvInputStream stream)
                      throws IlvReadFileException

Reads a new IlvGnomonicProjection from the specified stream.

Throws:

IlvReadFileException

Since:

JViews 5.0

Method Detail

copy

public IlvProjection copy()

Copies the projection.

Specified by:

copy in class IlvProjection

Returns:

A copy of the projection.

write

public void write(IlvOutputStream stream)
           throws IOException

Writes this projection to the specified stream.

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 5.0

setLLCenter

public void setLLCenter(double lon,
                        double lat)

Specifies the central meridian and the central parallel associated with the projection. 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)

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.

sInverse

protected void sInverse(IlvCoordinate xy)

Implements the inverse projection for a sphere.

Overrides:

sInverse in class IlvProjection

Parameters:

xy - The Cartesian coordinates.

See Also:

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

toString

public String toString()

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

Overrides:

toString in class Object

Since:

JViews 7.5