org.geotools.referencing.operation.transform

Class SimilarityTransformProvider

Object

Formattable

AbstractIdentifiedObject

DefaultOperationMethod

MathTransformProvider

SimilarityTransformProvider

All Implemented Interfaces:

Serializable, IdentifiedObject, OperationMethod

public class SimilarityTransformProvider
extends MathTransformProvider

The provider for the "Similarity transformation" (EPSG 9621).

Note that similarity transform is a special case of an Affine transform 2D.

Author:

Oscar Fonts

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class MathTransformProvider

MathTransformProvider.Delegate

Field Summary

Fields

Modifier and Type	Field and Description
static ParameterDescriptor<Double>	ROTATION "Rotation angle of source coordinate reference system axes" EPSG::8614
static ParameterDescriptor<Double>	SCALE "Scale difference" EPSG::8611
static ParameterDescriptor<Double>	TRANSLATION_1 "Ordinate 1 of evaluation point in target CRS" EPSG::8621
static ParameterDescriptor<Double>	TRANSLATION_2 "Ordinate 2 of evaluation point in target CRS" EPSG::8622

Fields inherited from class DefaultOperationMethod

sourceDimensions, targetDimensions

Fields inherited from class AbstractIdentifiedObject

EMPTY_ALIAS_ARRAY, EMPTY_IDENTIFIER_ARRAY, IDENTIFIER_COMPARATOR, NAME_COMPARATOR, REMARKS_COMPARATOR

Fields inherited from class Formattable

SINGLE_LINE

Fields inherited from interface OperationMethod

FORMULA_KEY

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Constructor Summary

Constructors

Constructor and Description
SimilarityTransformProvider() Creates a two-dimensional similarity transform.

Method Summary

Modifier and Type	Method and Description
protected MathTransform	createMathTransform(ParameterValueGroup values) Constructs an AffineTransform2D math transform from the specified group of parameter values.

Methods inherited from class MathTransformProvider

createDescriptor, createDescriptorGroup, createOptionalDescriptor, doubleValue, ensureValidValues, formatWKT, getOperationType, getParameter, intValue, stringValue, toMap, value

Methods inherited from class DefaultOperationMethod

checkDimensions, equals, getFormula, getParameters, getSourceDimensions, getTargetDimensions, hashCode

Methods inherited from class AbstractIdentifiedObject

asSet, ensureAngularUnit, ensureLinearUnit, ensureNonNull, ensureNonNull, ensureTimeUnit, equals, equals, equals, equals, getAlias, getIdentifier, getIdentifier, getIdentifiers, getName, getName, getName, getProperties, getProperties, getRemarks, nameMatches, nameMatches, nameMatches

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 IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Field Detail

TRANSLATION_1

public static final ParameterDescriptor<Double> TRANSLATION_1

"Ordinate 1 of evaluation point in target CRS" EPSG::8621

TRANSLATION_2

public static final ParameterDescriptor<Double> TRANSLATION_2

"Ordinate 2 of evaluation point in target CRS" EPSG::8622

SCALE

public static final ParameterDescriptor<Double> SCALE

"Scale difference" EPSG::8611

ROTATION

public static final ParameterDescriptor<Double> ROTATION

"Rotation angle of source coordinate reference system axes" EPSG::8614

Constructor Detail

SimilarityTransformProvider

public SimilarityTransformProvider()

Creates a two-dimensional similarity transform.

EPSG defines explicitly this transform as 2D.

Method Detail

createMathTransform

protected MathTransform createMathTransform(ParameterValueGroup values)
                                     throws ParameterNotFoundException

Constructs an AffineTransform2D math transform from the specified group of parameter values.

The similarity transform is a particular case of Affine Transform 2D where:

 m00 = SCALE * cos(ROTATION)
 m01 = SCALE * sin(ROTATION)
 m02 = TRANSLATION_1
 m10 = -m01
 m11 = m00
 m12 = TRANSLATION_2
 

Specified by:

createMathTransform in class MathTransformProvider

Parameters:

values - The group of parameter values PARAMETERS.

Returns:

an AffineTransform2D.

Throws:

ParameterNotFoundException - if a required parameter was not found.

See Also:

MathTransformProvider.Delegate