/*$************************************************************************************************
 **
 ** $Id: GridGeometry.java 831 2006-05-01 00:27:23Z Desruisseaux $
 **
 ** $URL: http://svn.code.sf.net/p/geoapi/code/branches/2.0.x/geoapi/src/main/java/org/opengis/coverage/grid/GridGeometry.java $
 **
 ** Copyright (C) 2003-2005 Open GIS Consortium, Inc.
 ** All Rights Reserved. http://www.opengis.org/legal/
 **
 *************************************************************************************************/
package org.opengis.coverage.grid;

// OpenGIS direct dependencies
import org.opengis.referencing.operation.MathTransform;

// Annotations
import org.opengis.annotation.UML;
import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;


/**
 * Describes the geometry and georeferencing information of the grid coverage.
 * The grid range attribute determines the valid grid coordinates and allows
 * for calculation of grid size. A grid coverage may or may not have georeferencing.
 *
 * 
 
 * 
 *   
 * 

 *     
WARNING: THIS CLASS WILL CHANGE. Current API is derived from OGC
 *     Grid Coverages Implementation specification 1.0.
 *     We plan to replace it by new interfaces derived from ISO 19123 (Schema for coverage geometry
 *     and functions). Current interfaces should be considered as legacy and are included in this
 *     distribution only because they were part of GeoAPI 1.0 release. We will try to preserve as much 
 *     compatibility as possible, but no migration plan has been determined yet.
 *   
 *
 * @version Grid Coverage specification 1.0
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 1.0
 */
@UML(identifier="CV_GridGeometry", specification=OGC_01004)
public interface GridGeometry {
    /**
     * The valid coordinate range of a grid coverage.
     * The lowest valid grid coordinate is often (but not always) zero.
     * A grid with 512 cells typically have a minimum coordinate of 0 and maximum of 512,
     * with 511 as the highest valid index.
     *
     * @return The valid coordinate range of a grid coverage.
     */
    @UML(identifier="gridRange", obligation=MANDATORY, specification=OGC_01004)
    GridRange getGridRange();

    /**
     * The conversion allows for the transformations from grid coordinates to real
     * world earth coordinates. The transform is often an affine transformation. The
     * coordinate reference system of the real world coordinates is given by the
     * {@link org.opengis.coverage.Coverage#getCoordinateReferenceSystem} method.
     * If no conversion is given, this attribute will be {@code null}.
     *
     * @return The conversion from grid coordinates to
     *         {@linkplain org.opengis.coverage.Coverage#getCoordinateReferenceSystem
     *         real world earth coordinates}.
     */
    @UML(identifier="gridToCoordinateSystem", obligation=MANDATORY, specification=OGC_01004)
    MathTransform getGridToCoordinateSystem();
}