Application: gvSIG desktop » gvSIG projections

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2018 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.catalog;

/**

 * Defines the type of CRS. 

 * 

 * @author Cesar Martinez Izquierdo

 */

public enum CRSType {

        /**

         * A 2D coordinate reference system which defines a mathematical model

         * to approximate the surface of an area of the earth using a planar

         * surface. Projected CRSs are derived from a GeographicCRS (which is

         * called the base CRS), because the projection formulas are applied

         * to the geographic coordinates to create the projected coordinates. 

         */

        ProjectedCRSType,

        /**

         * A coordinate reference system which is defined by a coordinate conversion

         * from another coordinate reference system but is not a projected CRS.

         */

        OtherDerivedCRSType,

        /**

         * A coordinate reference system based on an ellipsoidal approximation of the

         * earth shape.

         */

        GeographicCRSType,

        /**

         * A 3D coordinate reference system with the origin at the approximate centre

         * of mass of the earth. A geocentric CRS deals with the earth's curvature by

         * taking a 3D spatial view, which obviates the need to model the earth's

         * curvature.

         */

        GeocentricCRSType,

        /**

         * A CRS which combines two or more independent coordinate reference systems,

         * for instance: ProjectedCRS + VerticalCRS,  GeographicCRS + TemporalCRS,

         * etc. 

         */

        CompoundCRSType,

        /**

         * A 1D coordinate reference system used for recording heights or depths.

         */

        VerticalCRSType,

        //ImageCRSType, #FIXME: consider ImageCRSType?   PixelInCell?

        /**

         * A 1D coordinate reference system used for the recording of time.

         */

        TemporalCRSType,

        /**

         * A CRS that does not fall under any of the other types, or whose type

         * is unknown.

         */

        OtherCRSType;

        public boolean isDerived() {

                return (this == ProjectedCRSType) || (this == OtherDerivedCRSType);

        }

}