Application: gvSIG desktop » gvSIG projections

/* gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2012 gvSIG Association

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.proj;

/**

 * In geodesy, a reference ellipsoid is a mathematically-defined surface that

 * approximates the geoid, the truer figure of the Earth, or other planetary

 * body. Because of their relative simplicity, reference ellipsoids are used as

 * a preferred surface on which geodetic network computations are performed and

 * point coordinates such as latitude, longitude, and elevation are defined.

 * 

 * @see http://en.wikipedia.org/wiki/Reference_ellipsoid

 * 

 * @author <a href="http://www.disid.com">DiSiD Technologies S.L.</a>

 * @version $Rev$

 * @since 0.1.0

 */

public interface Ellipsoid {

    /**

     * Returns the Ellipsoid short name, like the one used in ProJ4 definitions.

     * 

     * @return the Ellipsoid short name.

     */

    public String getShortName();

    /**

     * Return the name of the Ellipsoid.

     * 

     * @return the name of the Ellipsoid

     */

    public String getName();

    /**

     * Returns the the equatorial radius or semi-major axis value.

     * 

     * @return the equatorial radius or semi-major axis.

     */

    public double getSemiMajorAxis();

    /**

     * Returns the polar radius or semi-minor axis value.

     * 

     * @return the polar radius or semi-minor axis.

     */

    public double getSemiMinorAxis();

    /**

     * Returns the reciprocal flattening.

     * 

     * @return the reciprocal flattening.

     */

    public double getReciprocalFlattening();

}