org.geotools.referencing.operation.projection
Class StereographicPolar

java.lang.Object
  org.geotools.referencing.wkt.Formattable
      org.geotools.referencing.operation.transform.AbstractMathTransform
          org.geotools.referencing.operation.projection.MapProjection
              org.geotools.referencing.operation.projection.Stereographic
                  org.geotools.referencing.operation.projection.StereographicPolar

All Implemented Interfaces:

org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D, java.io.Serializable

public class StereographicPolar

extends Stereographic

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

Since:

2.1

Version:

$Id: StereographicPolar.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Andr? Gosselin, Martin Desruisseaux, Rueben Schulz

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.geotools.referencing.operation.projection.Stereographic

Stereographic.Provider_North_Pole, Stereographic.Provider_Oblique, Stereographic.Provider_Polar_A, Stereographic.Provider_Polar_B, Stereographic.Provider_South_Pole, Stereographic.Provider_USGS

Nested classes inherited from class org.geotools.referencing.operation.projection.MapProjection

MapProjection.AbstractProvider

Field Summary

protected double	latitudeTrueScale Latitude of true scale, in radians (a.k.a. standard_parallel_1).
protected boolean	southPole if this projection is for the south pole, or if it is for the north pole.

Fields inherited from class org.geotools.referencing.operation.projection.Stereographic

EPSG, POLAR_A, POLAR_B, POLAR_NORTH, POLAR_SOUTH, stereoType, USGS

Fields inherited from class org.geotools.referencing.operation.projection.MapProjection

centralMeridian, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, isSpherical, latitudeOfOrigin, scaleFactor, semiMajor, semiMinor

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) coordinate (units in radians) and stores the result in (linear distance on a unit sphere).
protected java.awt.geom.Point2D	transformNormalized(double x, double y, java.awt.geom.Point2D ptDst) Transforms the specified (x,y) coordinate (units in radians) and stores the result in (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, inverse, transform, transform, transform

Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform

createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getDimSource, getDimTarget, isIdentity, needCopy, rollLongitude, transform

Methods inherited from class org.geotools.referencing.wkt.Formattable

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

Field Detail

latitudeTrueScale

protected double latitudeTrueScale

Latitude of true scale, in radians (a.k.a. standard_parallel_1).

southPole

protected final boolean southPole

if this projection is for the south pole, or if it is for the north pole.

Method Detail

transformNormalized

protected java.awt.geom.Point2D transformNormalized(double x,
                                                    double y,
                                                    java.awt.geom.Point2D ptDst)
                                             throws ProjectionException

Transforms the specified (x,y) coordinate (units in radians) and stores the result in (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 , or . Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.

Returns:

the coordinate point after transforming , and storing the result in .

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) coordinate (units in radians) and stores the result in (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 , or . Ordinates will be in radians.

Returns:

the coordinate point after transforming , and storing the result in .

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.

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 MapProjection