Source Code Cross Referenced for DefaultGeocentricCRS.java in  » GIS » GeoTools-2.4.1 » org » geotools » referencing » crs » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.referencing.crs 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2003-2006, GeoTools Project Managment Committee (PMC)
005:         *    (C) 2001, Institut de Recherche pour le Développement
006:         *   
007:         *    This library is free software; you can redistribute it and/or
008:         *    modify it under the terms of the GNU Lesser General Public
009:         *    License as published by the Free Software Foundation;
010:         *    version 2.1 of the License.
011:         *
012:         *    This library is distributed in the hope that it will be useful,
013:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *    Lesser General Public License for more details.
016:         *
017:         *    This package contains documentation from OpenGIS specifications.
018:         *    OpenGIS consortium's work is fully acknowledged here.
019:         */
020:        package org.geotools.referencing.crs;
021:
022:        // J2SE dependencies and extensions
023:        import java.util.Collections;
024:        import java.util.Map;
025:        import javax.units.Unit;
026:
027:        // OpenGIS dependencies
028:        import org.opengis.referencing.cs.CartesianCS;
029:        import org.opengis.referencing.cs.SphericalCS;
030:        import org.opengis.referencing.crs.GeocentricCRS;
031:        import org.opengis.referencing.datum.GeodeticDatum;
032:
033:        // Geotools dependencies
034:        import org.geotools.referencing.wkt.Formatter;
035:        import org.geotools.referencing.AbstractReferenceSystem;
036:        import org.geotools.referencing.cs.DefaultCartesianCS;
037:        import org.geotools.referencing.cs.DefaultSphericalCS;
038:        import org.geotools.referencing.datum.DefaultGeodeticDatum;
039:        import org.geotools.resources.i18n.VocabularyKeys;
040:
041:        /**
042:         * A 3D coordinate reference system with the origin at the approximate centre of mass of the earth.
043:         * A geocentric CRS deals with the earth's curvature by taking a 3D spatial view, which obviates
044:         * the need to model the earth's curvature.
045:         *
046:         * <TABLE CELLPADDING='6' BORDER='1'>
047:         * <TR BGCOLOR="#EEEEFF"><TH NOWRAP>Used with CS type(s)</TH></TR>
048:         * <TR><TD>
049:         *   {@link CartesianCS Cartesian},
050:         *   {@link SphericalCS Spherical}
051:         * </TD></TR></TABLE>
052:         *
053:         * @since 2.1
054:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/referencing/src/main/java/org/geotools/referencing/crs/DefaultGeocentricCRS.java $
055:         * @version $Id: DefaultGeocentricCRS.java 24609 2007-02-26 23:35:53Z desruisseaux $
056:         * @author Martin Desruisseaux
057:         */
058:        public class DefaultGeocentricCRS extends AbstractSingleCRS implements 
059:                GeocentricCRS {
060:            /**
061:             * Serial number for interoperability with different versions.
062:             */
063:            private static final long serialVersionUID = 6784642848287659827L;
064:
065:            /**
066:             * The default geocentric CRS with a
067:             * {@linkplain DefaultCartesianCS#GEOCENTRIC cartesian coordinate system}.
068:             * Prime meridian is Greenwich, geodetic datum is WGS84 and linear units are metres.
069:             * The <var>X</var> axis points towards the prime meridian.
070:             * The <var>Y</var> axis points East.
071:             * The <var>Z</var> axis points North.
072:             */
073:            public static final DefaultGeocentricCRS CARTESIAN = new DefaultGeocentricCRS(
074:                    name(VocabularyKeys.CARTESIAN), DefaultGeodeticDatum.WGS84,
075:                    DefaultCartesianCS.GEOCENTRIC);
076:
077:            /**
078:             * The default geocentric CRS with a
079:             * {@linkplain DefaultSphericalCS#GEOCENTRIC spherical coordinate system}.
080:             * Prime meridian is Greenwich, geodetic datum is WGS84 and linear units are metres.
081:             */
082:            public static final DefaultGeocentricCRS SPHERICAL = new DefaultGeocentricCRS(
083:                    name(VocabularyKeys.SPHERICAL), DefaultGeodeticDatum.WGS84,
084:                    DefaultSphericalCS.GEOCENTRIC);
085:
086:            /**
087:             * Constructs a new geocentric CRS with the same values than the specified one.
088:             * This copy constructor provides a way to wrap an arbitrary implementation into a
089:             * Geotools one or a user-defined one (as a subclass), usually in order to leverage
090:             * some implementation-specific API. This constructor performs a shallow copy,
091:             * i.e. the properties are not cloned.
092:             *
093:             * @since 2.2
094:             */
095:            public DefaultGeocentricCRS(final GeocentricCRS crs) {
096:                super (crs);
097:            }
098:
099:            /**
100:             * Constructs a geocentric CRS from a name.
101:             *
102:             * @param name The name.
103:             * @param datum The datum.
104:             * @param cs The coordinate system.
105:             */
106:            public DefaultGeocentricCRS(final String name,
107:                    final GeodeticDatum datum, final CartesianCS cs) {
108:                this (Collections.singletonMap(NAME_KEY, name), datum, cs);
109:            }
110:
111:            /**
112:             * Constructs a geocentric CRS from a name.
113:             *
114:             * @param name The name.
115:             * @param datum The datum.
116:             * @param cs The coordinate system.
117:             */
118:            public DefaultGeocentricCRS(final String name,
119:                    final GeodeticDatum datum, final SphericalCS cs) {
120:                this (Collections.singletonMap(NAME_KEY, name), datum, cs);
121:            }
122:
123:            /**
124:             * Constructs a geographic CRS from a set of properties. The properties are given unchanged to
125:             * the {@linkplain AbstractReferenceSystem#AbstractReferenceSystem(Map) super-class constructor}.
126:             *
127:             * @param properties Set of properties. Should contains at least <code>"name"</code>.
128:             * @param datum The datum.
129:             * @param cs The coordinate system.
130:             */
131:            public DefaultGeocentricCRS(final Map properties,
132:                    final GeodeticDatum datum, final CartesianCS cs) {
133:                super (properties, datum, cs);
134:            }
135:
136:            /**
137:             * Constructs a geographic CRS from a set of properties.
138:             * The properties are given unchanged to the
139:             * {@linkplain AbstractReferenceSystem#AbstractReferenceSystem(Map) super-class constructor}.
140:             *
141:             * @param properties Set of properties. Should contains at least <code>"name"</code>.
142:             * @param datum The datum.
143:             * @param cs The coordinate system.
144:             */
145:            public DefaultGeocentricCRS(final Map properties,
146:                    final GeodeticDatum datum, final SphericalCS cs) {
147:                super (properties, datum, cs);
148:            }
149:
150:            /**
151:             * Returns a hash value for this geocentric CRS.
152:             *
153:             * @return The hash code value. This value doesn't need to be the same
154:             *         in past or future versions of this class.
155:             */
156:            public int hashCode() {
157:                return (int) serialVersionUID ^ super .hashCode();
158:            }
159:
160:            /**
161:             * Format the inner part of a
162:             * <A HREF="http://geoapi.sourceforge.net/snapshot/javadoc/org/opengis/referencing/doc-files/WKT.html"><cite>Well
163:             * Known Text</cite> (WKT)</A> element.
164:             *
165:             * @param  formatter The formatter to use.
166:             * @return The name of the WKT element type, which is {@code "GEOCCS"}.
167:             */
168:            protected String formatWKT(final Formatter formatter) {
169:                final Unit unit = getUnit();
170:                formatter.append(datum);
171:                formatter.append(((GeodeticDatum) datum).getPrimeMeridian());
172:                formatter.append(unit);
173:                final int dimension = coordinateSystem.getDimension();
174:                for (int i = 0; i < dimension; i++) {
175:                    formatter.append(coordinateSystem.getAxis(i));
176:                }
177:                if (unit == null) {
178:                    formatter.setInvalidWKT(GeocentricCRS.class);
179:                }
180:                return "GEOCCS";
181:            }
182:        }
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