001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/model/spatialschema/GenericSurface.java $
002    /*----------------------------------------------------------------------------
003     This file is part of deegree, http://deegree.org/
004     Copyright (C) 2001-2009 by:
005       Department of Geography, University of Bonn
006     and
007       lat/lon GmbH
008    
009     This library is free software; you can redistribute it and/or modify it under
010     the terms of the GNU Lesser General Public License as published by the Free
011     Software Foundation; either version 2.1 of the License, or (at your option)
012     any later version.
013     This library is distributed in the hope that it will be useful, but WITHOUT
014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016     details.
017     You should have received a copy of the GNU Lesser General Public License
018     along with this library; if not, write to the Free Software Foundation, Inc.,
019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020    
021     Contact information:
022    
023     lat/lon GmbH
024     Aennchenstr. 19, 53177 Bonn
025     Germany
026     http://lat-lon.de/
027    
028     Department of Geography, University of Bonn
029     Prof. Dr. Klaus Greve
030     Postfach 1147, 53001 Bonn
031     Germany
032     http://www.geographie.uni-bonn.de/deegree/
033    
034     e-mail: info@deegree.org
035    ----------------------------------------------------------------------------*/
036    
037    package org.deegree.model.spatialschema;
038    
039    /**
040     *
041     * The interface defines the basis of surfaces and surface patches
042     *
043     * <p>
044     * -----------------------------------------------------
045     * </p>
046     *
047     * @author Andreas Poth
048     * @version $Revision: 18195 $ $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
049     *          <p>
050     */
051    public interface GenericSurface {
052    
053        /**
054         * @return the length of all boundaries of the surface in a reference system appropriate for measuring distances.
055         */
056        double getPerimeter();
057    
058        /**
059         * The operation "area" shall return the area of this GenericSurface. The area of a 2 dimensional geometric object
060         * shall be a numeric measure of its surface area Since area is an accumulation (integral) of the product of two
061         * distances, its return value shall be in a unit of measure appropriate for measuring distances squared.
062         *
063         * @return the area
064         */
065        double getArea();
066    
067        /**
068         * @return the bounding box of the surface
069         */
070        Envelope getEnvelope();
071    
072    }