Module org.opengis.geoapi

Package org.opengis.referencing.operation

Interface CoordinateOperation

All Superinterfaces:

IdentifiedObject

All Known Subinterfaces:

ConcatenatedOperation, ConicProjection, Conversion, CylindricalProjection, PassThroughOperation, PlanarProjection, Projection, SingleOperation, Transformation

All Known Implementing Classes:

ProjectiveTransform, SimpleTransform, SimpleTransform2D

@Classifier(ABSTRACT)
@UML(identifier="CC_CoordinateOperation",
     specification=ISO_19111)
public interface CoordinateOperation
extends IdentifiedObject

A mathematical operation on coordinates that transforms or converts coordinates to another coordinate reference system.

Inverse operation

Many but not all coordinate operations (from coordinate reference system A to coordinate reference system B) also uniquely define the inverse operation (from coordinate reference system B to coordinate reference system A). In some cases, the operation method algorithm for the inverse operation is the same as for the forward algorithm, but the signs of some operation parameter values must be reversed. In other cases, different algorithms are required for the forward and inverse operations, but the same operation parameter values are used. If (some) entirely different parameter values are needed, a different coordinate operation shall be defined.

Since:

1.0

See Also:

• CoordinateOperationAuthorityFactory.createCoordinateOperation(String)
• CoordinateOperationAuthorityFactory.createFromCoordinateReferenceSystemCodes(String, String)
• CoordinateOperationFactory.createOperation(CoordinateReferenceSystem, CoordinateReferenceSystem)

Field Summary

Fields

Modifier and Type	Field	Description
static final String	COORDINATE_OPERATION_ACCURACY_KEY	Key for the "coordinateOperationAccuracy" property.
static final String	DOMAIN_OF_VALIDITY_KEY	Key for the "domainOfValidity" property.
static final String	OPERATION_VERSION_KEY	Key for the "operationVersion" property.
static final String	SCOPE_KEY	Key for the "scope" property.

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Method Summary

Modifier and Type	Method	Description
default Collection<PositionalAccuracy>	getCoordinateOperationAccuracy()	Estimate(s) of the impact of this operation on point accuracy.
default Extent	getDomainOfValidity()	Area or region or timeframe in which this coordinate operation is valid.
MathTransform	getMathTransform()	Gets the math transform.
String	getOperationVersion()	Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of the parameters).
default InternationalString	getScope()	Description of domain of usage, or limitations of usage, for which this operation is valid.
CoordinateReferenceSystem	getSourceCRS()	Returns the source CRS.
CoordinateReferenceSystem	getTargetCRS()	Returns the target CRS.

Methods inherited from interface IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Field Details

OPERATION_VERSION_KEY

static final String OPERATION_VERSION_KEY

Key for the "operationVersion" property. This is used for setting the value to be returned by getOperationVersion().

See Also:

• getOperationVersion()
• Constant Field Values

COORDINATE_OPERATION_ACCURACY_KEY

static final String COORDINATE_OPERATION_ACCURACY_KEY

Key for the "coordinateOperationAccuracy" property. This is used for setting the value to be returned by getCoordinateOperationAccuracy().

See Also:

• getCoordinateOperationAccuracy()
• Constant Field Values

DOMAIN_OF_VALIDITY_KEY

static final String DOMAIN_OF_VALIDITY_KEY

Key for the "domainOfValidity" property. This is used for setting the value to be returned by getDomainOfValidity().

See Also:

• getDomainOfValidity()
• Constant Field Values

SCOPE_KEY

static final String SCOPE_KEY

Key for the "scope" property. This is used for setting the value to be returned by getScope().

See Also:

• getScope()
• Constant Field Values

Method Details

getSourceCRS

@UML(identifier="sourceCRS",
     obligation=CONDITIONAL,
     specification=ISO_19111)
CoordinateReferenceSystem getSourceCRS()

Returns the source CRS. The source CRS is mandatory for transformations only. Conversions may have a source CRS that is not specified here, but through GeneralDerivedCRS.getBaseCRS() instead.

Returns:

the source CRS, or null if not available.

See Also:

• Conversion.getSourceCRS()
• Transformation.getSourceCRS()

getTargetCRS

@UML(identifier="targetCRS",
     obligation=CONDITIONAL,
     specification=ISO_19111)
CoordinateReferenceSystem getTargetCRS()

Returns the target CRS. The target CRS is mandatory for transformations only. Conversions may have a target CRS that is not specified here, but through GeneralDerivedCRS instead.

Returns:

the target CRS, or null if not available.

See Also:

• Conversion.getTargetCRS()
• Transformation.getTargetCRS()

getOperationVersion

@UML(identifier="operationVersion",
     obligation=CONDITIONAL,
     specification=ISO_19111)
String getOperationVersion()

Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of the parameters). Mandatory when describing a transformation, and should not be supplied for a conversion.

Returns:

the coordinate operation version, or null in none.

getCoordinateOperationAccuracy

@UML(identifier="coordinateOperationAccuracy",
     obligation=OPTIONAL,
     specification=ISO_19111)
default Collection<PositionalAccuracy> getCoordinateOperationAccuracy()

Estimate(s) of the impact of this operation on point accuracy. Gives position error estimates for target coordinates of this coordinate operation, assuming no errors in source coordinates.

Returns:

the position error estimates, or an empty collection if not available.

getDomainOfValidity

@UML(identifier="domainOfValidity",
     obligation=OPTIONAL,
     specification=ISO_19111)
default Extent getDomainOfValidity()

Area or region or timeframe in which this coordinate operation is valid.

Returns:

the coordinate operation valid domain, or null if not available.

See Also:

• ReferenceSystem.getDomainOfValidity()

getScope

@UML(identifier="scope",
     obligation=OPTIONAL,
     specification=ISO_19111)
default InternationalString getScope()

Description of domain of usage, or limitations of usage, for which this operation is valid.

Returns:

a description of domain of usage, or null if none.

Departure from OGC/ISO abstract specification:

Departure for historical reason

This method has been kept conformant with the specification published in 2003. The revision published in 2007 replaced the singleton by a collection and changed the obligation from "optional" to "mandatory", requiring a return value of "not known" if the scope is unknown. This change is still under review.

getMathTransform

@UML(identifier="CT_CoordinateTransformation.getMathTransform",
     specification=OGC_01009)
MathTransform getMathTransform()

Gets the math transform. The math transform will transform positions in the source coordinate reference system into positions in the target coordinate reference system. It may be null in the case of defining conversions.

Returns:

the transform from source to target CRS, or null if not applicable.