envelope.java

GEo 地理操作源代码

/*$************************************************************************************************
 **
 ** $Id: Envelope.java,v 1.7 2004/03/19 04:11:44 desruisseaux Exp $
 **
 ** $Source: /cvsroot/geoapi/src/org/opengis/spatialschema/geometry/Envelope.java,v $
 **
 ** Copyright (C) 2003 Open GIS Consortium, Inc. All Rights Reserved. http://www.opengis.org/Legal/
 **
 *************************************************************************************************/
package org.opengis.spatialschema.geometry;


/**
 * A minimum bounding box or rectangle. Regardless of dimension, an <code>Envelope</code> can
 * be represented without ambiguity as two direct positions (coordinate points). To encode an
 * <code>Envelope</code>, it is sufficient to encode these two points. This is consistent with
 * all of the data types in this specification, their state is represented by their publicly
 * accessible attributes.
 *
 * @UML datatype GM_Envelope
 * @author ISO/DIS 19107
 * @author <A HREF="http://www.opengis.org">OpenGIS&reg; consortium</A>
 * @version 2.0
 */
public interface Envelope {
    /**
     * A coordinate position consisting of all the maximal ordinates for each
     * dimension for all points within the <code>Envelope</code>.
     *
     * @return The upper corner.
     * @UML mandatory upperCorner
     */
    public DirectPosition getUpperCorner();

    /**
     * A coordinate position consisting of all the minimal ordinates for each
     * dimension for all points within the <code>Envelope</code>.
     *
     * @return The lower corner.
     * @UML mandatory lowerCorner
     */
    public DirectPosition getLowerCorner();
}