Package org.apache.sis.referencing.operation.projection

Class PolarStereographic.Spherical

java.lang.Object

org.apache.sis.io.wkt.FormattableObject

org.apache.sis.referencing.operation.transform.AbstractMathTransform

org.apache.sis.referencing.operation.transform.AbstractMathTransform2D

org.apache.sis.referencing.operation.projection.NormalizedProjection

org.apache.sis.referencing.operation.projection.ConformalProjection

org.apache.sis.referencing.operation.projection.PolarStereographic

org.apache.sis.referencing.operation.projection.PolarStereographic.Spherical

All Implemented Interfaces:

Serializable, Parameterized, LenientComparable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D

Enclosing class:

PolarStereographic

static final class PolarStereographic.Spherical
extends PolarStereographic

Provides the transform equations for the spherical case of the polar stereographic projection.

Since:

0.6

Version:

0.6

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.sis.referencing.operation.projection.PolarStereographic

PolarStereographic.Spherical

Nested classes/interfaces inherited from class org.apache.sis.referencing.operation.projection.NormalizedProjection

NormalizedProjection.ParameterRole

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID	For compatibility with different versions during deserialization.

Fields inherited from class org.apache.sis.referencing.operation.projection.ConformalProjection

ECCENTRICITY_THRESHOLD

Fields inherited from class org.apache.sis.referencing.operation.projection.NormalizedProjection

ANGULAR_TOLERANCE, context, eccentricity, eccentricitySquared, ITERATION_TOLERANCE, LARGE_LONGITUDE_LIMIT, MAXIMUM_ITERATIONS, POLAR_AREA_LIMIT

Fields inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform2D

DIMENSION

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Spherical(PolarStereographic other)	Constructs a new map projection from the parameters of the given projection.

Method Summary

Modifier and Type	Method	Description
protected void	inverseTransform(double[] srcPts, int srcOff, double[] dstPts, int dstOff)	Converts the specified (x,y) coordinates and stores the result in dstPts (angles in radians).
org.opengis.referencing.operation.Matrix	transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, boolean derivate)	Projects the specified (λ,φ) coordinates (units in radians) and stores the result in dstPts.

Methods inherited from class org.apache.sis.referencing.operation.projection.PolarStereographic

createMapProjection, getDomain

Methods inherited from class org.apache.sis.referencing.operation.projection.ConformalProjection

dy_dφ, expΨ, φ

Methods inherited from class org.apache.sis.referencing.operation.projection.NormalizedProjection

completeWithWraparound, computeHashCode, delegate, equals, getContextualParameters, getInternalParameterNames, getInternalParameterValues, getParameterDescriptors, getParameterValues, getWraparoundLongitude, inverse, tryConcatenate, tryConcatenate, variant

Methods inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform2D

createTransformedShape, derivative, getSourceDimensions, getTargetDimensions, transform

Methods inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform

derivative, equals, formatTo, hashCode, isIdentity, transform, transform, transform, transform, transform

Methods inherited from class org.apache.sis.io.wkt.FormattableObject

print, toString, toString, toWKT

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.opengis.referencing.operation.MathTransform

derivative, isIdentity, toWKT, transform, transform, transform, transform, transform

Field Details

serialVersionUID

private static final long serialVersionUID

For compatibility with different versions during deserialization.

See Also:

• Constant Field Values

Constructor Details

Spherical

protected Spherical(PolarStereographic other)

Constructs a new map projection from the parameters of the given projection.

Parameters:

other - the other projection (usually ellipsoidal) from which to copy the parameters.

Method Details

transform

public org.opengis.referencing.operation.Matrix transform(double[] srcPts,
 int srcOff,
 double[] dstPts,
 int dstOff,
 boolean derivate)

Projects the specified (λ,φ) coordinates (units in radians) and stores the result in dstPts. In addition, opportunistically computes the projection derivative if derivate is true. The results must be multiplied by the denormalization matrix before to get linear distances.

Overrides:

transform in class PolarStereographic

Parameters:

srcPts - the array containing the source point coordinates, as (longitude, latitude) angles in radians.

srcOff - the offset of the single coordinate tuple to be converted in the source array.

dstPts - the array into which the converted coordinates is returned (may be the same than srcPts). Coordinates will be expressed in a dimensionless unit, as a linear distance on a unit sphere or ellipse.

dstOff - the offset of the location of the converted coordinates that is stored in the destination array.

derivate - true for computing the derivative, or false if not needed.

Returns:

the matrix of the projection derivative at the given source position, or null if the derivate argument is false.

See Also:

• AbstractMathTransform.derivative(DirectPosition)
• AbstractMathTransform.transform(DirectPosition, DirectPosition)
• MathTransforms.derivativeAndTransform(MathTransform, double[], int, double[], int)

inverseTransform

protected void inverseTransform(double[] srcPts,
 int srcOff,
 double[] dstPts,
 int dstOff)

Converts the specified (x,y) coordinates and stores the result in dstPts (angles in radians).

Overrides:

inverseTransform in class PolarStereographic

Parameters:

srcPts - the array containing the source point coordinates, as linear distance on a unit sphere or ellipse.

srcOff - the offset of the point to be converted in the source array.

dstPts - the array into which the converted point coordinates is returned (may be the same than srcPts). Coordinates will be (longitude, latitude) angles in radians.

dstOff - the offset of the location of the converted point that is stored in the destination array.