Application: gvSIG desktop » gvSIG projections

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2018 gvSIG Association.

 * 

 * This file has been adapted from GeoAPI, see 

 * the original copyright headers bellow.

 *

 * 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.

 * 

 * ----------

 * 

 *    GeoAPI - Java interfaces for OGC/ISO standards

 *    http://www.geoapi.org

 *

 *    Copyright (C) 2004-2017 Open Geospatial Consortium, Inc.

 *    All Rights Reserved. http://www.opengeospatial.org/ogc/legal

 *

 *    Permission to use, copy, and modify this software and its documentation, with

 *    or without modification, for any purpose and without fee or royalty is hereby

 *    granted, provided that you include the following on ALL copies of the software

 *    and documentation or portions thereof, including modifications, that you make:

 *

 *    1. The full text of this NOTICE in a location viewable to users of the

 *       redistributed or derivative work.

 *    2. Notice of any changes or modifications to the OGC files, including the

 *       date changes were made.

 *

 *    THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE

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 *    TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT

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 *    PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.

 *

 *    COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR

 *    CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENTATION.

 *

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 *    publicity pertaining to the software without specific, written prior permission.

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 */

package org.gvsig.proj.catalogue.crs;

import org.gvsig.proj.catalogue.datum.EngineeringDatum;

/**

 * A 1-, 2- or 3-dimensional contextually local coordinate reference system.

 * It can be divided into two broad categories:

 *

 * <ul>

 *   <li>earth-fixed systems applied to engineering activities on or near the surface of the earth;</li>

 *   <li>CRSs on moving platforms such as road vehicles, vessels, aircraft, or spacecraft.</li>

 * </ul>

 *

 * Earth-fixed Engineering CRSs are commonly based on a simple flat-earth approximation of the

 * earth's surface, and the effect of earth curvature on feature geometry is ignored: calculations

 * on coordinates use simple plane arithmetic without any corrections for earth curvature. The

 * application of such Engineering CRSs to relatively small areas and "contextually local" is in

 * this case equivalent to "spatially local".

 *

 * <p>Engineering CRSs used on moving platforms are usually intermediate coordinate reference

 * systems that are computationally required to calculate coordinates referenced to

 * {@linkplain GeocentricCRS geocentric}, {@linkplain GeographicCRS geographic} or

 * {@linkplain ProjectedCRS projected} CRSs. These engineering coordinate reference

 * systems are subject to all the motions of the platform with which they are associated.

 * In this case "contextually local" means that the associated coordinates are meaningful

 * only relative to the moving platform. Earth curvature is usually irrelevant and is therefore

 * ignored. In the spatial sense their applicability may extend from the immediate vicinity of

 * the platform (e.g. a moving seismic ship) to the entire earth (e.g. in space applications).

 * The determining factor is the mathematical model deployed in the positioning calculations.

 * Transformation of coordinates from these moving Engineering CRSs to earth-referenced coordinate

 * reference systems involves time-dependent coordinate operation parameters.</p>

 *

 * <p>This type of CRS can be used with coordinate systems of type

 * {@link org.opengis.referencing.cs.AffineCS},

 * {@link org.opengis.referencing.cs.CartesianCS},

 * {@link org.opengis.referencing.cs.CylindricalCS},

 * {@link org.opengis.referencing.cs.LinearCS},

 * {@link org.opengis.referencing.cs.PolarCS},

 * {@link org.opengis.referencing.cs.SphericalCS},

 * {@link org.opengis.referencing.cs.UserDefinedCS}.</p>

 *

 * Note: gvSIG derived these interfaces from GeoAPI in order to have a simpler API and also to

 * avoid namespace collisions (e.g. GeoAPI 3 vs GeoTools interfaces). There is no plans

 * to evolve these interfaces to adapt them to future GeoAPI versions.

 * 

 * @author  gvSIG Team

 * @author  Martin Desruisseaux (IRD)

 * @version 3.0

 * @since   1.0

 *

 * @see CRSAuthorityFactory#createEngineeringCRS(String)

 * @see CRSFactory#createEngineeringCRS(Map, EngineeringDatum, CoordinateSystem)

 */

public interface EngineeringCRS extends SingleCRS {

    /**

     * Returns the datum, which shall be an engineering one.

     */

    @Override

    EngineeringDatum getDatum();

}