geotools/io/GeoImportUtilURL.java

/*******************************************************************************
 * Copyright (c) 2009 Martin O. J. Schmitz.
 * 
 * This file is part of the SCHMITZM library - a collection of utility 
 * classes based on Java 1.6, focusing (not only) on Java Swing 
 * and the Geotools library.
 * 
 * The SCHMITZM project is hosted at:
 * http://wald.intevation.org/projects/schmitzm/
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * 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 Lesser General Public License (license.txt)
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * or try this link: http://www.gnu.org/licenses/lgpl.html
 * 
 * Contributors:
 *     Martin O. J. Schmitz - initial API and implementation
 *     Stefan A. Krüger - additional utility classes
 ******************************************************************************/
package skrueger.geotools.io;

import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;

import javax.imageio.IIOException;
import javax.imageio.ImageIO;

import org.apache.log4j.Logger;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.factory.Hints;
import org.geotools.gce.geotiff.GeoTiffReader;
import org.geotools.geometry.Envelope2D;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

import schmitzm.geotools.io.GeoImportUtil;
import schmitzm.io.IOUtil;

/**
 * Erweiterungen von Martin's {@link GeoImportUtil} classe fuer die konsequente Benutzung mit {@link URL}s.
 * TODO Diese Klasse sollte vielleicht mit der {@link GeoImportUtil} zusammengefuegt werden.
 *
 * @author <a href="mailto:[email protected]">Stefan Alfons Kr&uuml;ger</a>
 *
 */
public class GeoImportUtilURL extends GeoImportUtil {
        final static private Logger LOGGER = Logger.getLogger(GeoImportUtilURL.class);

        /**
         * Read a {@link GridCoverage2D} from an image file. .prj and .wld files are usually expected
         */
        public static GridCoverage2D readGridFromImage(URL url) throws IOException {
                return readGridFromImage(url, null);
        }

        /**
         * Read a {@link GridCoverage2D} from an image file. .wld file is usually expected also. The CRS can be given as the crs parameter. null is valid.
         *
         * @author <a href="mailto:[email protected]">Martin Schmitz</a> (University of Bonn/Germany)
         * @author <a href="mailto:[email protected]">Stefan Alfons Kr&uuml;ger</a>
         */
        public static GridCoverage2D readGridFromImage(URL url,
                        CoordinateReferenceSystem crs) throws IOException {
                GridCoverage2D gc = null;

                BufferedImage im = ImageIO.read(url);
                if (im == null)
                        throw new IIOException("No image reader found for this image type!");

                // World-File einlesen
                double[] tfwInfo = null;

                for (WORLD_POSTFIXES pf : WORLD_POSTFIXES.values()){
                        if (tfwInfo == null) {
                                try {
                                        tfwInfo = readWorldFile( IOUtil.changeUrlExt(url, pf.toString() ).openStream());
                                } catch (Exception e) {
                                }
                        }
                }

                if (tfwInfo == null)
                        throw new IllegalArgumentException(
                                        "No georeferencing information found.\n"
                                        + "Attach a .wld file to "+url+"please.");

                float w = (float) (im.getWidth() * tfwInfo[0]); // reale Breite =
                // RasterSpalten *
                // hor. Aufloesung
                float h = (float) (im.getHeight() * (-tfwInfo[3])); // reale Hoehe =
                // RasterZeilen
                // * vert.
                // Aufloesung
                float x = (float) tfwInfo[4]; // Suedwestliche Ecke!
                float y = (float) tfwInfo[5] - h; // Suedwestliche Ecke (im
                // tfw-File steht die
                // Nordwestliche!)
                // ggf. Projektion einlesen
                if (crs == null) {
                        crs = determineProjection( IOUtil.changeUrlExt(url, "prj") );
                }
                Envelope2D envelope = new Envelope2D(crs, new Rectangle2D.Float(x, y,
                                w, h));
                // WICHTIG: Name des Rasters sollte Leer-String sein, da ansonsten
                // das
                // Coloring des Rasters nicht klappt.
                // --> Name der Categories und ColorMapEntries-Labels muss (warum auch immer) mit dem Namen
                // des Rasters uebereinstimmen!!!
                gc = new GridCoverageFactory().create("", im, envelope);

                return gc;
        }

        /**
         * Diese Methode importiert ein Raster aus einer Datei im GeoTIFF-Format.
         * Zunaechst wird versucht, die Geo-Informationen (Referenz+CRS) aus den
         * TIFF-Metadaten zu ermitteln. Ist dies nicht erfolgreich, werden ein
         * gleichnamiges World-File (.tfw) und Projection-File (.prj) herangezogen.
         * Als Projektion (.prj) ist sowohl ein EPSG-Code "EPSG:...", als auch eine
         * WKT-Definition erlaubt. Kann kein CRS ermitteln werden, wird
         * {@link #DEFAULT_CRS} als CRS verwendet.
         *
         * @param geotiffURL
         *            URL to GeoTIFF-File
         * @param crs
         *            erzwungenes CoordinateReferenceSystem fuer das Raster (kann
         *            {@code null} sein)
         * @throws java.lang.Exception
         *             bei irgendeinem Fehler
         *
         * @author <a href="mailto:[email protected]">Martin Schmitz</a>
         *         (University of Bonn/Germany)
         * @author <a href="mailto:[email protected]">Stefan Alfons Kr&uuml;ger</a>
         */
        public static GridCoverage2D readGridFromGeoTiff(URL geotiffURL,
                        CoordinateReferenceSystem crs) throws Exception {
                GridCoverage2D gc = null;
                LOGGER.debug("Loading GeoTiff from URL = " + geotiffURL + " now.");

                // Versuchen Geo-Information aus Tiff zu lesen
                try {

                        // Wenn CRS angegeben, dieses durch Hint erzwingen
                        Hints hints = new Hints();

                        if (crs != null)
                                hints.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM, crs);
                        // Reader (mit Metadaten) erzeugen

                        LOGGER.debug("First try to create GeoTiff reader");

                        /**
                         * Attention, Attention: The GeoTiffReader fails for URLs like:
                         * 
                         * jar:file:/home/sdsd/ad/atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
                         * 
                         * It should be converted to something like:
                         * jar:http:///atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
                         * jar:http://www.wikisquare.de/atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
                         */
                        GeoTiffReader reader = new GeoTiffReader(geotiffURL, hints);

                        // Wenn kein Referenzsystem vorhanden, versuchen ein prj-File zu
                        // verwenden
                        if (reader.getOriginalEnvelope().getCoordinateReferenceSystem() == null) {
                                LOGGER
                                                .warn("Second try because no projection information found in GeoTIFF. Using prj-file...");

                                final CoordinateReferenceSystem determineProjection = determineProjection(IOUtil.changeUrlExt(
                                                geotiffURL, "prj"));
                                hints.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM,
                                                determineProjection);
                                reader = new GeoTiffReader(geotiffURL, hints);
                        }
                        gc = (GridCoverage2D) reader.read(null);
                        LOGGER.debug("... was successfull!");
                } catch (UnsupportedOperationException err) {
                        LOGGER.debug("... failed.");
                        LOGGER.error(err);
                        LOGGER.warn("No GeoTIFF information found. Using simple image + world- and prj-file...");
                        LOGGER.debug("Second try to use readGridFromImage()");
                        gc = readGridFromImage(geotiffURL, crs); //TODO style
                }
                return gc;
        }


}
1	alfonx	244	/*******************************************************************************
2			* Copyright (c) 2009 Martin O. J. Schmitz.
3			*
4			* This file is part of the SCHMITZM library - a collection of utility
5	alfonx	256	* classes based on Java 1.6, focusing (not only) on Java Swing
6	alfonx	244	* and the Geotools library.
7			*
8			* The SCHMITZM project is hosted at:
9			* http://wald.intevation.org/projects/schmitzm/
10			*
11			* This program is free software; you can redistribute it and/or
12			* modify it under the terms of the GNU Lesser General Public License
13			* as published by the Free Software Foundation; either version 3
14			* of the License, or (at your option) any later version.
15			*
16			* This program is distributed in the hope that it will be useful,
17			* but WITHOUT ANY WARRANTY; without even the implied warranty of
18			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19			* GNU General Public License for more details.
20			*
21			* You should have received a copy of the GNU Lesser General Public License (license.txt)
22			* along with this program; if not, write to the Free Software
23			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24			* or try this link: http://www.gnu.org/licenses/lgpl.html
25			*
26			* Contributors:
27			* Martin O. J. Schmitz - initial API and implementation
28			* Stefan A. Krüger - additional utility classes
29			******************************************************************************/
30			package skrueger.geotools.io;
31
32			import java.awt.geom.Rectangle2D;
33			import java.awt.image.BufferedImage;
34			import java.io.IOException;
35			import java.net.URL;
36
37			import javax.imageio.IIOException;
38			import javax.imageio.ImageIO;
39
40			import org.apache.log4j.Logger;
41			import org.geotools.coverage.grid.GridCoverage2D;
42			import org.geotools.coverage.grid.GridCoverageFactory;
43			import org.geotools.factory.Hints;
44			import org.geotools.gce.geotiff.GeoTiffReader;
45			import org.geotools.geometry.Envelope2D;
46			import org.opengis.referencing.crs.CoordinateReferenceSystem;
47
48			import schmitzm.geotools.io.GeoImportUtil;
49			import schmitzm.io.IOUtil;
50
51			/**
52			* Erweiterungen von Martin's {@link GeoImportUtil} classe fuer die konsequente Benutzung mit {@link URL}s.
53			* TODO Diese Klasse sollte vielleicht mit der {@link GeoImportUtil} zusammengefuegt werden.
54			*
55			* @author <a href="mailto:[email protected]">Stefan Alfons Krüger</a>
56			*
57			*/
58			public class GeoImportUtilURL extends GeoImportUtil {
59			final static private Logger LOGGER = Logger.getLogger(GeoImportUtilURL.class);
60
61			/**
62			* Read a {@link GridCoverage2D} from an image file. .prj and .wld files are usually expected
63			*/
64			public static GridCoverage2D readGridFromImage(URL url) throws IOException {
65			return readGridFromImage(url, null);
66			}
67
68			/**
69			* Read a {@link GridCoverage2D} from an image file. .wld file is usually expected also. The CRS can be given as the crs parameter. null is valid.
70			*
71			* @author <a href="mailto:[email protected]">Martin Schmitz</a> (University of Bonn/Germany)
72			* @author <a href="mailto:[email protected]">Stefan Alfons Krüger</a>
73			*/
74			public static GridCoverage2D readGridFromImage(URL url,
75			CoordinateReferenceSystem crs) throws IOException {
76			GridCoverage2D gc = null;
77
78			BufferedImage im = ImageIO.read(url);
79			if (im == null)
80			throw new IIOException("No image reader found for this image type!");
81
82			// World-File einlesen
83			double[] tfwInfo = null;
84
85			for (WORLD_POSTFIXES pf : WORLD_POSTFIXES.values()){
86			if (tfwInfo == null) {
87			try {
88			tfwInfo = readWorldFile( IOUtil.changeUrlExt(url, pf.toString() ).openStream());
89			} catch (Exception e) {
90			}
91			}
92			}
93
94			if (tfwInfo == null)
95			throw new IllegalArgumentException(
96			"No georeferencing information found.\n"
97			+ "Attach a .wld file to "+url+"please.");
98
99			float w = (float) (im.getWidth() * tfwInfo[0]); // reale Breite =
100			// RasterSpalten *
101			// hor. Aufloesung
102			float h = (float) (im.getHeight() * (-tfwInfo[3])); // reale Hoehe =
103			// RasterZeilen
104			// * vert.
105			// Aufloesung
106			float x = (float) tfwInfo[4]; // Suedwestliche Ecke!
107			float y = (float) tfwInfo[5] - h; // Suedwestliche Ecke (im
108			// tfw-File steht die
109			// Nordwestliche!)
110			// ggf. Projektion einlesen
111			if (crs == null) {
112			crs = determineProjection( IOUtil.changeUrlExt(url, "prj") );
113			}
114			Envelope2D envelope = new Envelope2D(crs, new Rectangle2D.Float(x, y,
115			w, h));
116			// WICHTIG: Name des Rasters sollte Leer-String sein, da ansonsten
117			// das
118			// Coloring des Rasters nicht klappt.
119			// --> Name der Categories und ColorMapEntries-Labels muss (warum auch immer) mit dem Namen
120			// des Rasters uebereinstimmen!!!
121			gc = new GridCoverageFactory().create("", im, envelope);
122
123			return gc;
124			}
125
126			/**
127			* Diese Methode importiert ein Raster aus einer Datei im GeoTIFF-Format.
128			* Zunaechst wird versucht, die Geo-Informationen (Referenz+CRS) aus den
129			* TIFF-Metadaten zu ermitteln. Ist dies nicht erfolgreich, werden ein
130			* gleichnamiges World-File (.tfw) und Projection-File (.prj) herangezogen.
131			* Als Projektion (.prj) ist sowohl ein EPSG-Code "EPSG:...", als auch eine
132			* WKT-Definition erlaubt. Kann kein CRS ermitteln werden, wird
133			* {@link #DEFAULT_CRS} als CRS verwendet.
134			*
135			* @param geotiffURL
136			* URL to GeoTIFF-File
137			* @param crs
138			* erzwungenes CoordinateReferenceSystem fuer das Raster (kann
139			* {@code null} sein)
140			* @throws java.lang.Exception
141			* bei irgendeinem Fehler
142			*
143			* @author <a href="mailto:[email protected]">Martin Schmitz</a>
144			* (University of Bonn/Germany)
145			* @author <a href="mailto:[email protected]">Stefan Alfons Krüger</a>
146			*/
147			public static GridCoverage2D readGridFromGeoTiff(URL geotiffURL,
148			CoordinateReferenceSystem crs) throws Exception {
149			GridCoverage2D gc = null;
150			LOGGER.debug("Loading GeoTiff from URL = " + geotiffURL + " now.");
151
152			// Versuchen Geo-Information aus Tiff zu lesen
153			try {
154
155			// Wenn CRS angegeben, dieses durch Hint erzwingen
156	alfonx	323	Hints hints = new Hints();
157	alfonx	244
158			if (crs != null)
159			hints.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM, crs);
160			// Reader (mit Metadaten) erzeugen
161
162			LOGGER.debug("First try to create GeoTiff reader");
163
164			/**
165			* Attention, Attention: The GeoTiffReader fails for URLs like:
166			*
167			* jar:file:/home/sdsd/ad/atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
168			*
169			* It should be converted to something like:
170			* jar:http:///atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
171			* jar:http://www.wikisquare.de/atlas/raster_textur00949608497.jar!/ad/data/raster_textur00949608497/textur.tif
172			*/
173			GeoTiffReader reader = new GeoTiffReader(geotiffURL, hints);
174
175			// Wenn kein Referenzsystem vorhanden, versuchen ein prj-File zu
176			// verwenden
177			if (reader.getOriginalEnvelope().getCoordinateReferenceSystem() == null) {
178			LOGGER
179			.warn("Second try because no projection information found in GeoTIFF. Using prj-file...");
180
181			final CoordinateReferenceSystem determineProjection = determineProjection(IOUtil.changeUrlExt(
182			geotiffURL, "prj"));
183			hints.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM,
184			determineProjection);
185			reader = new GeoTiffReader(geotiffURL, hints);
186			}
187			gc = (GridCoverage2D) reader.read(null);
188			LOGGER.debug("... was successfull!");
189			} catch (UnsupportedOperationException err) {
190			LOGGER.debug("... failed.");
191			LOGGER.error(err);
192			LOGGER.warn("No GeoTIFF information found. Using simple image + world- and prj-file...");
193			LOGGER.debug("Second try to use readGridFromImage()");
194			gc = readGridFromImage(geotiffURL, crs); //TODO style
195			}
196			return gc;
197			}
198
199
200			}