Source Code Cross Referenced for JTSTest.java in  » GIS » GeoTools-2.4.1 » org » geotools » geometry » jts » 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.geometry.jts 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    uDig - User Friendly Desktop Internet GIS client
003:         *    http://udig.refractions.net
004:         *    (C) 2004, Refractions Research Inc.
005:         *
006:         *    This library is free software; you can redistribute it and/or
007:         *    modify it under the terms of the GNU Lesser General Public
008:         *    License as published by the Free Software Foundation;
009:         *    version 2.1 of the License.
010:         *
011:         *    This library is distributed in the hope that it will be useful,
012:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         *    Lesser General Public License for more details.
015:         */
016:        package org.geotools.geometry.jts;
017:
018:        // J2SE dependencies
019:        import java.awt.geom.AffineTransform;
020:
021:        // JTS dependencies
022:        import com.vividsolutions.jts.geom.Coordinate;
023:        import com.vividsolutions.jts.geom.Envelope;
024:
025:        // OpenGIS dependencies
026:        import org.opengis.referencing.FactoryException;
027:        import org.opengis.referencing.operation.MathTransform2D;
028:        import org.opengis.referencing.operation.TransformException;
029:        import org.opengis.referencing.crs.CoordinateReferenceSystem;
030:
031:        // Geotools dependencies
032:        import org.geotools.referencing.wkt.Parser;
033:        import org.geotools.referencing.ReferencingFactoryFinder;
034:        import org.geotools.referencing.crs.DefaultProjectedCRS;
035:        import org.geotools.referencing.crs.DefaultGeographicCRS;
036:        import org.geotools.referencing.operation.matrix.GeneralMatrix;
037:        import org.geotools.referencing.operation.projection.PointOutsideEnvelopeException;
038:
039:        // JUnit dependencies
040:        import junit.framework.Test;
041:        import junit.framework.TestCase;
042:        import junit.framework.TestSuite;
043:
044:        /**
045:         * Tests the {@link JTS} implementation.
046:         *
047:         * @since 2.2
048:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/main/src/test/java/org/geotools/geometry/jts/JTSTest.java $
049:         * @version $Id: JTSTest.java 27848 2007-11-12 13:10:32Z desruisseaux $
050:         * @author Jess Eichar
051:         * @author Martin Desruisseaux
052:         */
053:        public class JTSTest extends TestCase {
054:            /**
055:             * The tolerance factor.
056:             */
057:            private static final double EPS = 0.000001;
058:
059:            /**
060:             * A CRS for testing purpose.
061:             */
062:            static final String UTM_ZONE_10N = "PROJCS[\"NAD_1983_UTM_Zone_10N\",\n"
063:                    + "  GEOGCS[\"GCS_North_American_1983\",\n"
064:                    + "    DATUM[\"D_North_American_1983\",\n"
065:                    + "      TOWGS84[0,0,0,0,0,0,0],\n"
066:                    + "      SPHEROID[\"GRS_1980\",6378137,298.257222101]],\n"
067:                    + "    PRIMEM[\"Greenwich\",0],\n"
068:                    + "    UNIT[\"Degree\",0.017453292519943295]],\n"
069:                    + "  PROJECTION[\"Transverse_Mercator\"],\n"
070:                    + "    PARAMETER[\"False_Easting\",500000],\n"
071:                    + "    PARAMETER[\"False_Northing\",0],\n"
072:                    + "    PARAMETER[\"Central_Meridian\",-123],\n"
073:                    + "    PARAMETER[\"Scale_Factor\",0.9996],\n"
074:                    + "    PARAMETER[\"Latitude_Of_Origin\",0],\n"
075:                    + "  UNIT[\"Meter\",1]]";
076:            /**
077:             * A CRS for testing purpose.
078:             */
079:            static final String NAD83_BC = "PROJCS[\"NAD83 / BC Albers\",\n"
080:                    + "  GEOGCS[\"NAD83\",DATUM[\"North_American_Datum_1983\",\n"
081:                    + "    SPHEROID[\"GRS 1980\",6378137,298.257222101,AUTHORITY[\"EPSG\",\"7019\"]],\n"
082:                    + "    TOWGS84[0,0,0],AUTHORITY[\"EPSG\",\"6269\"]],\n"
083:                    + "    PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],\n"
084:                    + "    UNIT[\"degree\",0.01745329251994328,AUTHORITY[\"EPSG\",\"9122\"]],\n"
085:                    + "    AUTHORITY[\"EPSG\",\"4269\"]],\n"
086:                    + "  PROJECTION[\"Albers_Conic_Equal_Area\"],\n"
087:                    + "  PARAMETER[\"standard_parallel_1\",50],\n"
088:                    + "  PARAMETER[\"standard_parallel_2\",58.5],\n"
089:                    + "  PARAMETER[\"latitude_of_center\",45],\n"
090:                    + "  PARAMETER[\"longitude_of_center\",-126],\n"
091:                    + "  PARAMETER[\"false_easting\",1000000],\n"
092:                    + "  PARAMETER[\"false_northing\",0],\n"
093:                    + "  UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],\n"
094:                    + "  AUTHORITY[\"EPSG\",\"3005\"]]";
095:
096:            /**
097:             * Run the suite from the command line.
098:             */
099:            public static void main(String[] args) {
100:                org.geotools.util.logging.Logging.GEOTOOLS
101:                        .forceMonolineConsoleOutput();
102:                junit.textui.TestRunner.run(suite());
103:            }
104:
105:            /**
106:             * Returns the test suite.
107:             */
108:            public static Test suite() {
109:                return new TestSuite(JTSTest.class);
110:            }
111:
112:            /**
113:             * Tests the transformation of a single coordinate.
114:             */
115:            public void testTransformCoordinate() throws FactoryException,
116:                    TransformException {
117:                Coordinate coord = new Coordinate(10, 10);
118:                AffineTransform at = AffineTransform.getScaleInstance(0.5, 1);
119:                MathTransform2D t = (MathTransform2D) ReferencingFactoryFinder
120:                        .getMathTransformFactory(null).createAffineTransform(
121:                                new GeneralMatrix(at));
122:                coord = JTS.transform(coord, coord, t);
123:                assertEquals(new Coordinate(5, 10), coord);
124:                coord = JTS.transform(coord, coord, t.inverse());
125:                assertEquals(new Coordinate(10, 10), coord);
126:
127:                CoordinateReferenceSystem crs = ReferencingFactoryFinder
128:                        .getCRSFactory(null).createFromWKT(UTM_ZONE_10N);
129:                t = (MathTransform2D) ReferencingFactoryFinder
130:                        .getCoordinateOperationFactory(null).createOperation(
131:                                DefaultGeographicCRS.WGS84, crs)
132:                        .getMathTransform();
133:                coord = new Coordinate(-123, 55);
134:                coord = JTS.transform(coord, coord, t);
135:                coord = JTS.transform(coord, coord, t.inverse());
136:                assertEquals(-123, coord.x, EPS);
137:                assertEquals(55, coord.y, EPS);
138:            }
139:
140:            /*
141:             * Tests the transformation of an envelope.
142:             */
143:            public void testTransformEnvelopeMathTransform()
144:                    throws FactoryException, TransformException {
145:                Envelope envelope = new Envelope(0, 10, 0, 10);
146:                AffineTransform at = AffineTransform.getScaleInstance(0.5, 1);
147:                MathTransform2D t = (MathTransform2D) ReferencingFactoryFinder
148:                        .getMathTransformFactory(null).createAffineTransform(
149:                                new GeneralMatrix(at));
150:                envelope = JTS.transform(envelope, t);
151:                assertEquals(new Envelope(0, 5, 0, 10), envelope);
152:                envelope = JTS.transform(envelope, t.inverse());
153:                assertEquals(new Envelope(0, 10, 0, 10), envelope);
154:
155:                envelope = JTS.transform(envelope, null, t, 10);
156:                assertEquals(new Envelope(0, 5, 0, 10), envelope);
157:                envelope = JTS.transform(envelope, null, t.inverse(), 10);
158:                assertEquals(new Envelope(0, 10, 0, 10), envelope);
159:
160:                CoordinateReferenceSystem crs = ReferencingFactoryFinder
161:                        .getCRSFactory(null).createFromWKT(UTM_ZONE_10N);
162:                t = (MathTransform2D) ReferencingFactoryFinder
163:                        .getCoordinateOperationFactory(null).createOperation(
164:                                DefaultGeographicCRS.WGS84, crs)
165:                        .getMathTransform();
166:                envelope = new Envelope(-123, -133, 55, 60);
167:                envelope = JTS.transform(envelope, t);
168:                envelope = JTS.transform(envelope, t.inverse());
169:                /*
170:                 * Use a large tolerance factory for comparaisons because an accurate transformed envelope
171:                 * is bigger than the envelope that we get if we transformed only the 4 corners, and the
172:                 * inverse envelope way expand yet again the envelope for exactly the same reason.
173:                 */
174:                assertEquals(-133, envelope.getMinX(), 1.5);
175:                assertEquals(-123, envelope.getMaxX(), EPS);
176:                assertEquals(55, envelope.getMinY(), 0.5);
177:                assertEquals(60, envelope.getMaxY(), 0.5);
178:            }
179:
180:            /**
181:             * Tests the distance between points function
182:             */
183:            public void testOrthodromicDistance() throws Exception {
184:                final Parser parser = new Parser();
185:                final DefaultProjectedCRS crs = (DefaultProjectedCRS) parser
186:                        .parseObject(NAD83_BC);
187:                double d = JTS.orthodromicDistance(new Coordinate(
188:                        1402848.1938534670, 651571.1729878788), new Coordinate(
189:                        1389481.3104009738, 641990.9430108378), crs);
190:                double realValue = 16451.33114;
191:                assertEquals(realValue, d, 0.1);
192:            }
193:
194:            public void testCheckCoordinateRange() throws Exception {
195:                DefaultGeographicCRS crs = DefaultGeographicCRS.WGS84;
196:
197:                // valid
198:                JTS.checkCoordinatesRange(JTS.toGeometry(new Envelope(-10, 10,
199:                        -10, 10)), crs);
200:
201:                // invalid lat
202:                try {
203:                    JTS.checkCoordinatesRange(JTS.toGeometry(new Envelope(-10,
204:                            10, -100, 10)), crs);
205:                    fail("Provided invalid coordinates, yet check did not throw an exception");
206:                } catch (PointOutsideEnvelopeException e) {
207:                    // fine
208:                }
209:
210:                // invalid lon
211:                try {
212:                    JTS.checkCoordinatesRange(JTS.toGeometry(new Envelope(-190,
213:                            10, -10, 10)), crs);
214:                    fail("Provided invalid coordinates, yet check did not throw an exception");
215:                } catch (PointOutsideEnvelopeException e) {
216:                    // fine
217:                }
218:
219:            }
220:        }
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