/*$************************************************************************************************
 **
 ** $Id: Projection.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/referencing/operation/Projection.java $
 **
 ** Copyright (C) 2003-2005 Open GIS Consortium, Inc.
 ** All Rights Reserved. http://www.opengis.org/legal/
 **
 *************************************************************************************************/
package org.opengis.referencing.operation;

// Annotations
import org.opengis.annotation.Extension;


/**
 * A {@linkplain org.opengis.referencing.operation.Conversion conversion} transforming
 * (longitude,latitude) coordinates to cartesian coordinates
 * (x,y). Although some map projections can be represented as a
 * geometric process, in general a map projection is a set of formulae that converts geodetic
 * latitude and longitude to plane (map) coordinates. Height plays no role in this process,
 * which is entirely two-dimensional. The same map projection can be applied to many
 * {@linkplain org.opengis.referencing.crs.GeographicCRS geographic CRSs}, resulting in many
 * {@linkplain org.opengis.referencing.crs.ProjectedCRS projected CRSs} each of which is related
 * to the same {@linkplain org.opengis.referencing.datum.GeodeticDatum geodetic datum} as the
 * geographic CRS on which it was based.
 * 

 * An unofficial list of projections and their parameters can
 * be found there.
 * Most projections expect the following parameters:
 *  "semi_major" (mandatory),
 *  "semi_minor" (mandatory),
 *  "central_meridian" (default to 0),
 *  "latitude_of_origin" (default to 0),
 *  "scale_factor" (default to 1),
 *  "false_easting" (default to 0) and
 *  "false_northing" (default to 0).
 *
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 1.0
 *
 * @see org.opengis.referencing.crs.ProjectedCRS
 * @see Map projections on MathWorld
 */
@Extension
public interface Projection extends Conversion {
}