org.geotools.referencing.operation.projection
Class PolarStereographic

java.lang.Object
  extended by org.geotools.referencing.wkt.Formattable
      extended by org.geotools.referencing.operation.transform.AbstractMathTransform
          extended by org.geotools.referencing.operation.projection.MapProjection
              extended by org.geotools.referencing.operation.projection.Stereographic
                  extended by org.geotools.referencing.operation.projection.PolarStereographic
All Implemented Interfaces:
java.io.Serializable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D

public class PolarStereographic
extends Stereographic

The polar case of the stereographic projection. This default implementation uses USGS equation (i.e. iteration) for computing the inverse transform.

Since:
2.4
Version:
$Id: PolarStereographic.java 30760 2008-06-18 14:28:24Z desruisseaux $
Author:
André Gosselin, Martin Desruisseaux (PMO, IRD), Rueben Schulz
See Also:
Serialized Form

Nested Class Summary
static class PolarStereographic.ProviderA
          The math transform provider for a Polar Stereographic projection.
static class PolarStereographic.ProviderB
          The math transform provider for a Polar Stereographic (Variant B) projection.
static class PolarStereographic.ProviderNorth
          The math transform provider for a North Polar Stereographic projection.
static class PolarStereographic.ProviderSouth
          The math transform provider for a South Polar Stereographic projection.
 
Nested classes/interfaces inherited from class org.geotools.referencing.operation.projection.Stereographic
Stereographic.Provider
 
Nested classes/interfaces inherited from class org.geotools.referencing.operation.projection.MapProjection
MapProjection.AbstractProvider
 
Field Summary
 
Fields inherited from class org.geotools.referencing.operation.projection.MapProjection
centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor
 
Fields inherited from class org.geotools.referencing.wkt.Formattable
SINGLE_LINE
 
Method Summary
 boolean equals(java.lang.Object object)
          Compares the specified object with this map projection for equality.
 org.opengis.parameter.ParameterValueGroup getParameterValues()
          Returns the parameter values for this map projection.
 int hashCode()
          Returns a hash value for this map projection.
protected  java.awt.geom.Point2D inverseTransformNormalized(double x, double y, java.awt.geom.Point2D ptDst)
          Transforms the specified (x,y) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
protected  java.awt.geom.Point2D transformNormalized(double x, double y, java.awt.geom.Point2D ptDst)
          Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
 
Methods inherited from class org.geotools.referencing.operation.projection.Stereographic
getParameterDescriptors
 
Methods inherited from class org.geotools.referencing.operation.projection.MapProjection
getSourceDimensions, getTargetDimensions, getToleranceForAssertions, inv_mlfn, inverse, mlfn, resetWarnings, transform, transform, transform
 
Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform
createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, rollLongitude, transform, transform, transform
 
Methods inherited from class org.geotools.referencing.wkt.Formattable
cleanupThreadLocals, toString, toWKT, toWKT, toWKT
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.opengis.referencing.operation.MathTransform2D
createTransformedShape, derivative
 
Methods inherited from interface org.opengis.referencing.operation.MathTransform
derivative, isIdentity, toWKT, transform, transform, transform
 

Method Detail

transformNormalized

protected java.awt.geom.Point2D transformNormalized(double x,
                                                    double y,
                                                    java.awt.geom.Point2D ptDst)
                                             throws ProjectionException
Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).

Specified by:
transformNormalized in class MapProjection
Parameters:
x - The longitude of the coordinate, in radians.
y - The latitude of the coordinate, in radians.
ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
Returns:
the coordinate point after transforming (lambda, phi) and storing the result in ptDst.
Throws:
ProjectionException - if the point can't be transformed.

inverseTransformNormalized

protected java.awt.geom.Point2D inverseTransformNormalized(double x,
                                                           double y,
                                                           java.awt.geom.Point2D ptDst)
                                                    throws ProjectionException
Transforms the specified (x,y) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).

Specified by:
inverseTransformNormalized in class MapProjection
Parameters:
x - The easting of the coordinate, linear distance on a unit sphere or ellipse.
y - The northing of the coordinate, linear distance on a unit sphere or ellipse.
ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in radians.
Returns:
the coordinate point after transforming x, y and storing the result in ptDst.
Throws:
ProjectionException - if the point can't be transformed.

getParameterValues

public org.opengis.parameter.ParameterValueGroup getParameterValues()
Returns the parameter values for this map projection.

Overrides:
getParameterValues in class MapProjection
Returns:
A copy of the parameter values for this map projection.
See Also:
Operation.getParameterValues()

hashCode

public int hashCode()
Returns a hash value for this map projection.

Overrides:
hashCode in class MapProjection

equals

public boolean equals(java.lang.Object object)
Compares the specified object with this map projection for equality.

Overrides:
equals in class Stereographic
Parameters:
object - The object to compare with this transform.
Returns:
true if the given object is a transform of the same class and if, given identical source position, the transformed position would be the equals.


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