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Standard interfaces implemented throughout the library.

There is a newer version: 24.2-oss84-1

/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2011, Open Source Geospatial Foundation (OSGeo)
 *    (C) 2003-2005, Open Geospatial Consortium Inc.
 *
 *    All Rights Reserved. http://www.opengis.org/legal/
 */
package org.opengis.referencing.operation;

import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;

import org.opengis.annotation.UML;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

/**
 * 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.
 *
 * @version Abstract
 *     specification 2.0
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 1.0
 * @see Conversion
 */
@UML(identifier = "CC_Transformation", specification = ISO_19111)
public interface Transformation extends Operation {
    /**
     * Returns the source CRS.
     *
     * @return The source CRS (never {@code null}).
     */
    @UML(identifier = "sourceCRS", obligation = MANDATORY, specification = ISO_19111)
    CoordinateReferenceSystem getSourceCRS();

    /**
     * Returns the target CRS.
     *
     * @return The target CRS (never {@code null}).
     */
    @UML(identifier = "targetCRS", obligation = MANDATORY, specification = ISO_19111)
    CoordinateReferenceSystem getTargetCRS();

    /**
     * Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of
     * the parameters). This attribute is mandatory in a Transformation.
     *
     * @return The coordinate operation version.
     */
    @UML(identifier = "operationVersion", obligation = MANDATORY, specification = ISO_19111)
    String getOperationVersion();
}