coordinatereferencesystem.java

GEo 地理操作源代码

/*$************************************************************************************************
 **
 ** $Id: CoordinateReferenceSystem.java,v 1.1.2.1 2004/05/18 11:20:27 desruisseaux Exp $
 **
 ** $Source: /cvsroot/geoapi/src/org/opengis/referencing/crs/CoordinateReferenceSystem.java,v $
 **
 ** Copyright (C) 2003 Open GIS Consortium, Inc. All Rights Reserved. http://www.opengis.org/Legal/
 **
 *************************************************************************************************/
package org.opengis.referencing.crs;

// OpenGIS direct dependencies
import org.opengis.referencing.ReferenceSystem;
import org.opengis.referencing.cs.CoordinateSystem;
import org.opengis.referencing.datum.Datum;


/**
 * Abstract coordinate reference system, consisting of a single
 * {@linkplain CoordinateSystem Coordinate System} and a single
 * {@linkplain Datum Datum} (as opposed to {@linkplain CompoundCRS Compound CRS}).
 *
 * A coordinate reference system consists of an ordered sequence of coordinate system
 * axes that are related to the earth through a datum. A coordinate reference system
 * is defined by one datum and by one coordinate system. Most coordinate reference system
 * do not move relative to the earth, except for engineering coordinate reference systems
 * defined on moving platforms such as cars, ships, aircraft, and spacecraft.
 *
 * Coordinate reference systems are commonly divided into sub-types. The common classification
 * criterion for sub-typing of coordinate reference systems is the way in which they deal with
 * earth curvature. This has a direct effect on the portion of the earth's surface that can be
 * covered by that type of CRS with an acceptable degree of error. The exception to the rule is
 * the subtype "Temporal" which has been added by analogy.
 *
 * @UML abstract SC_CoordinateReferenceSystem
 * @author ISO 19111
 * @author <A HREF="http://www.opengis.org">OpenGIS&reg; consortium</A>
 * @version <A HREF="http://www.opengis.org/docs/03-073r1.zip">Abstract specification 2.0</A>
 *
 * @see org.opengis.referencing.cs.CoordinateSystem
 * @see org.opengis.referencing.datum.Datum
 */
public interface CoordinateReferenceSystem extends ReferenceSystem {
    /**
     * Returns the coordinate system.
     *
     * @return The coordinate system.
     * @UML association usesCS
     *
     * @rename Expanded the "CS" abbreviation into "CoordinateSystem".
     */
    CoordinateSystem getCoordinateSystem();

    /**
     * Returns the datum.
     *
     * @return The datum.
     * @UML association usesDatum
     */
    Datum getDatum();
}