Package org.geotools.api.referencing.operation

Interface Transformation

All Superinterfaces:

CoordinateOperation, IdentifiedObject, Operation, SingleOperation

All Known Implementing Classes:

DefaultTransformation

public interface Transformation
extends Operation

An operation on coordinates that usually includes a change of Datum. The parameters of a coordinate transformation are empirically derived from data containing the coordinates of a series of points in both coordinate reference systems. This computational process is usually "over-determined", allowing derivation of error (or accuracy) estimates for the transformation. Also, the stochastic nature of the parameters may result in multiple (different) versions of the same coordinate transformation.

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

See Also:

• Conversion

Field Summary

Fields inherited from interface CoordinateOperation

COORDINATE_OPERATION_ACCURACY_KEY, DOMAIN_OF_VALIDITY_KEY, OPERATION_VERSION_KEY, SCOPE_KEY

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Method Summary

Modifier and Type	Method	Description
String	getOperationVersion()	Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of the parameters).
CoordinateReferenceSystem	getSourceCRS()	Returns the source CRS.
CoordinateReferenceSystem	getTargetCRS()	Returns the target CRS.

Methods inherited from interface CoordinateOperation

getCoordinateOperationAccuracy, getDomainOfValidity, getMathTransform, getScope

Methods inherited from interface IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Methods inherited from interface Operation

getMethod, getParameterValues

Method Details

getSourceCRS

CoordinateReferenceSystem getSourceCRS()

Returns the source CRS.

Specified by:

getSourceCRS in interface CoordinateOperation

Returns:

The source CRS (never null).

See Also:

• Conversion.getSourceCRS()
• getSourceCRS()

getTargetCRS

CoordinateReferenceSystem getTargetCRS()

Returns the target CRS.

Specified by:

getTargetCRS in interface CoordinateOperation

Returns:

The target CRS (never null).

See Also:

• Conversion.getTargetCRS()
• getTargetCRS()

getOperationVersion

String getOperationVersion()

Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of the parameters). This attribute is mandatory in a Transformation.

Specified by:

getOperationVersion in interface CoordinateOperation

Returns:

The coordinate operation version.