Source Code Cross Referenced for GridCoverageRendererTest.java in  » GIS » GeoTools-2.4.1 » org » geotools » renderer » lite » 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.renderer.lite 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2004-2006, Geotools Project Managment Committee (PMC)
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; either
009:         *    version 2.1 of the License, or (at your option) any later version.
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.renderer.lite;
017:
018:        import java.awt.Color;
019:        import java.awt.geom.Rectangle2D;
020:        import java.awt.image.RenderedImage;
021:        import java.io.File;
022:        import java.io.IOException;
023:        import java.text.ParseException;
024:
025:        import javax.imageio.ImageIO;
026:
027:        import junit.framework.TestCase;
028:        import junit.textui.TestRunner;
029:
030:        import org.geotools.coverage.Category;
031:        import org.geotools.coverage.GridSampleDimension;
032:        import org.geotools.coverage.grid.GridCoverage2D;
033:        import org.geotools.coverage.grid.GridCoverageFactory;
034:        import org.geotools.geometry.GeneralEnvelope;
035:        import org.geotools.geometry.jts.ReferencedEnvelope;
036:        import org.geotools.map.DefaultMapContext;
037:        import org.geotools.map.MapContext;
038:        import org.geotools.referencing.crs.DefaultGeographicCRS;
039:        import org.geotools.referencing.crs.DefaultProjectedCRS;
040:        import org.geotools.referencing.cs.DefaultCartesianCS;
041:        import org.geotools.referencing.operation.DefaultMathTransformFactory;
042:        import org.geotools.referencing.operation.DefaultOperationMethod;
043:        import org.geotools.referencing.operation.transform.LinearTransform1D;
044:        import org.geotools.styling.RasterSymbolizer;
045:        import org.geotools.styling.Style;
046:        import org.geotools.styling.StyleBuilder;
047:        import org.geotools.test.TestData;
048:        import org.geotools.util.NumberRange;
049:        import org.opengis.coverage.grid.GridCoverage;
050:        import org.opengis.parameter.ParameterValueGroup;
051:        import org.opengis.referencing.FactoryException;
052:        import org.opengis.referencing.NoSuchIdentifierException;
053:        import org.opengis.referencing.crs.CoordinateReferenceSystem;
054:        import org.opengis.referencing.crs.GeographicCRS;
055:        import org.opengis.referencing.datum.Ellipsoid;
056:        import org.opengis.referencing.datum.GeodeticDatum;
057:        import org.opengis.referencing.operation.MathTransform;
058:
059:        /**
060:         * @author Simone Giannecchini
061:         * @source $URL:
062:         *         http://svn.geotools.org/geotools/trunk/gt/module/render/test/org/geotools/renderer/lite/GridCoverageRendererTest.java $
063:         */
064:        public class GridCoverageRendererTest extends TestCase {
065:
066:            public GridCoverageRendererTest(String testName) {
067:                super (testName);
068:
069:            }
070:
071:            String FILENAME = "TestGridCoverage.jpg";
072:
073:            /**
074:             * Returns a {@link GridCoverage} which may be used as a "real world"
075:             * example.
076:             * 
077:             * @param number
078:             *            The example number. Numbers are numeroted from 0 to
079:             *            {@link #getNumExamples()} exclusive.
080:             * @return The "real world" grid coverage.
081:             * @throws IOException
082:             *             if an I/O operation was needed and failed.
083:             * @throws ParseException
084:             * @throws IllegalArgumentException
085:             */
086:            private final GridCoverage2D getGC() throws IOException,
087:                    IllegalArgumentException, ParseException {
088:                final String path;
089:                final Rectangle2D bounds;
090:
091:                // unit = "°C";
092:                path = "TestGridCoverage.tif";
093:                final CoordinateReferenceSystem crs = DefaultGeographicCRS.WGS84;
094:
095:                // 41°S - 5°N ; 35°E - 80°E (450 x 460 pixels)
096:                bounds = new Rectangle2D.Double(35, -41, 45, 46);
097:                final Category values = new Category("values",
098:                        new Color[] { Color.BLACK }, new NumberRange(0, 255),
099:                        LinearTransform1D.IDENTITY);
100:                final GeneralEnvelope envelope = new GeneralEnvelope(bounds);
101:                final RenderedImage image = ImageIO.read(TestData.getResource(
102:                        this , path));
103:                final int numBands = image.getSampleModel().getNumBands();
104:                final GridSampleDimension[] bands = new GridSampleDimension[numBands];
105:                // setting bands names.
106:                for (int i = 0; i < numBands; i++) {
107:
108:                    bands[i] = new GridSampleDimension("band " + i,
109:                            new Category[] { values }, null).geophysics(true);
110:                }
111:                final String filename = new File(path).getName();
112:                final GridCoverageFactory factory = org.geotools.coverage.FactoryFinder
113:                        .getGridCoverageFactory(null);
114:                envelope.setCoordinateReferenceSystem(crs);
115:                return (GridCoverage2D) factory.create(filename, image,
116:                        envelope, bands, null, null);
117:            }
118:
119:            /**
120:             * Returns a projected CRS for test purpose.
121:             */
122:            private static CoordinateReferenceSystem getProjectedCRS(
123:                    final GridCoverage2D coverage) {
124:                try {
125:                    final GeographicCRS base = (GeographicCRS) coverage
126:                            .getCoordinateReferenceSystem();
127:                    final Ellipsoid ellipsoid = ((GeodeticDatum) base
128:                            .getDatum()).getEllipsoid();
129:                    final DefaultMathTransformFactory factory = new DefaultMathTransformFactory();
130:                    final ParameterValueGroup parameters = factory
131:                            .getDefaultParameters("Oblique_Stereographic");
132:                    parameters.parameter("semi_major").setValue(
133:                            ellipsoid.getSemiMajorAxis());
134:                    parameters.parameter("semi_minor").setValue(
135:                            ellipsoid.getSemiMinorAxis());
136:                    parameters.parameter("central_meridian").setValue(5);
137:                    parameters.parameter("latitude_of_origin").setValue(-5);
138:                    final MathTransform mt;
139:                    try {
140:                        mt = factory.createParameterizedTransform(parameters);
141:                    } catch (FactoryException exception) {
142:                        fail(exception.getLocalizedMessage());
143:                        return null;
144:                    }
145:                    return new DefaultProjectedCRS("Stereographic",
146:                            new DefaultOperationMethod(mt), base, mt,
147:                            DefaultCartesianCS.PROJECTED);
148:                } catch (NoSuchIdentifierException exception) {
149:                    fail(exception.getLocalizedMessage());
150:                    return null;
151:                }
152:            }
153:
154:            public void testPaint() throws Exception {
155:
156:                //
157:                // /////////////////////////////////////////////////////////////////
158:                //
159:                // CREATING A GRID COVERAGE
160:                //
161:                //
162:                // /////////////////////////////////////////////////////////////////
163:                final GridCoverage2D gc = getGC();
164:
165:                //
166:                //
167:                // /////////////////////////////////////////////////////////////////
168:                //
169:                // MAP CONTEXT
170:                //
171:                //
172:                // /////////////////////////////////////////////////////////////////
173:                final MapContext context = new DefaultMapContext(
174:                        DefaultGeographicCRS.WGS84);
175:                final Style style = getStyle();
176:                context.addLayer(gc, style);
177:
178:                // /////////////////////////////////////////////////////////////////
179:                //
180:                // Streaming renderer
181:                //
182:                //
183:                // ///////////////////////////////////////////////////////////////
184:                final StreamingRenderer renderer = new StreamingRenderer();
185:                renderer.setContext(context);
186:
187:                RendererBaseTest.showRender("testGridCoverage", renderer, 1000,
188:                        context.getLayerBounds());
189:
190:            }
191:
192:            public void testReproject() throws Exception {
193:
194:                // ///////////////////////////////////////////////////////////////////
195:                //
196:                // CREATING A GRID COVERAGE
197:                //
198:                //
199:                // // /////////////////////////////////////////////////////////////////
200:                final GridCoverage2D coverage = getGC();
201:                //
202:                // ///////////////////////////////////////////////////////////////////
203:                //
204:                // MAP CONTEXT
205:                // We want to show the context in a different CRS
206:                //
207:                //
208:                // /////////////////////////////////////////////////////////////////
209:                final MapContext context = new DefaultMapContext(
210:                        DefaultGeographicCRS.WGS84);
211:                final Style style = getStyle();
212:                context.addLayer(coverage, style);
213:
214:                // transform to a new crs
215:                final CoordinateReferenceSystem destCRS = getProjectedCRS(coverage);
216:
217:                //
218:                // ///////////////////////////////////////////////////////////////////
219:                //
220:                // Streaming renderer
221:                //
222:                //
223:                // /////////////////////////////////////////////////////////////////
224:                final StreamingRenderer renderer = new StreamingRenderer();
225:                renderer.setContext(context);
226:
227:                ReferencedEnvelope env = context.getLayerBounds();
228:                env = new ReferencedEnvelope(env.getMinX(), env.getMaxX(), env
229:                        .getMinY(), env.getMaxY(), DefaultGeographicCRS.WGS84);
230:                final ReferencedEnvelope newbounds = env.transform(destCRS,
231:                        true);
232:
233:                RendererBaseTest.showRender("testGridCoverageReprojection",
234:                        renderer, 1000, newbounds);
235:
236:            }
237:
238:            private Style getStyle() {
239:                StyleBuilder sb = new StyleBuilder();
240:                Style rasterstyle = sb.createStyle();
241:                RasterSymbolizer raster = sb.createRasterSymbolizer();
242:
243:                rasterstyle.addFeatureTypeStyle(sb
244:                        .createFeatureTypeStyle(raster));
245:                rasterstyle.getFeatureTypeStyles()[0]
246:                        .setFeatureTypeName("GridCoverage");
247:                return rasterstyle;
248:            }
249:
250:            public static void main(final String[] args) {
251:                TestRunner.run(GridCoverageRendererTest.class);
252:            }
253:        }
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