Package org.geotools.referencing.operation.projection

Class PolarStereographic

Object

Formattable

AbstractMathTransform

MapProjection

Stereographic

PolarStereographic

All Implemented Interfaces:

Serializable, MathTransform, 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

Author:

André Gosselin, Martin Desruisseaux (PMO, IRD), Rueben Schulz

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	PolarStereographic.ProviderA	The math transform provider for a Polar Stereographic projection.
static final class	PolarStereographic.ProviderB	The math transform provider for a Polar Stereographic (Variant B) projection.
static final class	PolarStereographic.ProviderNorth	The math transform provider for a North Polar Stereographic projection.
static final class	PolarStereographic.ProviderSouth	The math transform provider for a South Polar Stereographic projection.

Nested classes/interfaces inherited from class Stereographic

Stereographic.Provider

Nested classes/interfaces inherited from class MapProjection

MapProjection.AbstractProvider

Field Summary

Fields inherited from class MapProjection

centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, invertible, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor, SKIP_SANITY_CHECKS

Fields inherited from class Formattable

SINGLE_LINE

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object object)	Compares the specified object with this map projection for equality.
ParameterValueGroup	getParameterValues()	Returns the parameter values for this map projection.
int	hashCode()	Returns a hash value for this map projection.
protected Point2D	inverseTransformNormalized(double x, double y, Point2D ptDst)	Transforms the specified (x,y) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
protected Point2D	transformNormalized(double x, double y, 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 Stereographic

getParameterDescriptors

Methods inherited from class MapProjection

checkReciprocal, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, inv_mlfn, inverse, mlfn, orthodromicDistance, resetWarnings, transform, transform, transform

Methods inherited from class AbstractMathTransform

createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, normalizeAngle, rollLongitude, transform, transform, transform

Methods inherited from class Formattable

cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT

Methods inherited from class Object

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

Methods inherited from interface MathTransform

derivative, isIdentity, toWKT, transform, transform, transform

Methods inherited from interface MathTransform2D

createTransformedShape, derivative

Method Details

transformNormalized

protected Point2D transformNormalized(double x,
 double y,
 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 Point2D inverseTransformNormalized(double x,
 double y,
 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 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 Stereographic

equals

public boolean equals(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.