001/*
002 *    GeoAPI - Java interfaces for OGC/ISO standards
003 *    Copyright © 2003-2023 Open Geospatial Consortium, Inc.
004 *    http://www.geoapi.org
005 *
006 *    Licensed under the Apache License, Version 2.0 (the "License");
007 *    you may not use this file except in compliance with the License.
008 *    You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *    Unless required by applicable law or agreed to in writing, software
013 *    distributed under the License is distributed on an "AS IS" BASIS,
014 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 *    See the License for the specific language governing permissions and
016 *    limitations under the License.
017 */
018package org.opengis.referencing.cs;
019
020import java.util.Map;
021import org.opengis.annotation.UML;
022import static org.opengis.annotation.Specification.*;
023
024
025/**
026 * A 2- or 3-dimensional coordinate system for use with geodetic <abbr>CRS</abbr>.
027 * Position is specified by geodetic latitude, geodetic longitude, and (in the 3D case) ellipsoidal height.
028 *
029 * <p>This type of <abbr>CS</abbr> can be used by coordinate reference systems of type
030 * {@link org.opengis.referencing.crs.GeographicCRS}, potentially in combination with
031 * {@link org.opengis.referencing.crs.DerivedCRS}.
032 * The following examples describe some possible set of axes for ellipsoidal CS used with the above-cited CRS:</p>
033 *
034 * <table class="ogc">
035 *   <caption>Example 1: used with a two-dimensional Geographic CRS</caption>
036 *   <tr><th>Axis name</th> <th>Abbr.</th> <th>Direction</th> <th>Unit</th></tr>
037 *   <tr><td>Geodetic latitude</td> <td>φ</td> <td>{@link AxisDirection#NORTH}</td><td>degree</td></tr>
038 *   <tr><td>Geodetic longitude</td><td>λ</td> <td>{@link AxisDirection#EAST}</td> <td>degree</td></tr>
039 * </table>
040 *
041 * <table class="ogc">
042 *   <caption>Example 2: used with a three-dimensional Geographic CRS</caption>
043 *   <tr><th>Axis name</th> <th>Abbr.</th> <th>Direction</th> <th>Unit</th></tr>
044 *   <tr><td>Geodetic latitude</td> <td>φ</td> <td>{@link AxisDirection#NORTH}</td><td>degree</td></tr>
045 *   <tr><td>Geodetic longitude</td><td>λ</td> <td>{@link AxisDirection#EAST}</td> <td>degree</td></tr>
046 *   <tr><td>Ellipsoidal height</td><td>h</td> <td>{@link AxisDirection#UP}</td>   <td>metre</td></tr>
047 * </table>
048 *
049 * @author  OGC Topic 2 (for abstract model and documentation)
050 * @author  Martin Desruisseaux (IRD, Geomatys)
051 * @version 3.1
052 * @since   1.0
053 *
054 * @see CSAuthorityFactory#createEllipsoidalCS(String)
055 * @see CSFactory#createEllipsoidalCS(Map, CoordinateSystemAxis, CoordinateSystemAxis)
056 * @see CSFactory#createEllipsoidalCS(Map, CoordinateSystemAxis, CoordinateSystemAxis, CoordinateSystemAxis)
057 */
058@UML(identifier="EllipsoidalCS", specification=ISO_19111)
059public interface EllipsoidalCS extends CoordinateSystem {
060}