001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/model/coverage/grid/TiffDEMParser.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.model.coverage.grid;
037
038 import java.awt.image.BufferedImage;
039 import java.awt.image.DataBuffer;
040 import java.io.File;
041
042 import org.apache.batik.ext.awt.image.codec.FileCacheSeekableStream;
043 import org.apache.batik.ext.awt.image.codec.tiff.TIFFDecodeParam;
044 import org.apache.batik.ext.awt.image.codec.tiff.TIFFImage;
045
046 /**
047 * Parses 4 channel (32Bit) tiff images as DEM and returns a float matrix containing the DEM heights
048 *
049 *
050 * @version $Revision: 18195 $
051 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
052 * @author last edited by: $Author: mschneider $
053 *
054 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
055 *
056 * @since 2.0
057 */
058 public class TiffDEMParser {
059
060 private DataBuffer db;
061
062 private float scale = 0;
063
064 private float offset = 0;
065
066 private int width = 0;
067
068 private int height = 0;
069
070 /**
071 *
072 * @param dataFile
073 * image containing DEM data instead color information
074 */
075 public TiffDEMParser( File dataFile ) {
076 this( dataFile, 1, 0 );
077 }
078
079 /**
080 *
081 * @param dataFile
082 * image containing DEM data instead color information
083 * @param scale
084 * scale factor; newHeight[i][j] = height[i][j] * scale
085 */
086 public TiffDEMParser( File dataFile, float scale ) {
087 this( dataFile, scale, 0 );
088 }
089
090 /**
091 *
092 * @param dataFile
093 * image containing DEM data instead color information
094 * @param scale
095 * scale factor; newHeight[i][j] = height[i][j] * scale
096 * @param offset
097 * height offset; newHeight[i][j] = height[i][j] + offset
098 */
099 public TiffDEMParser( File dataFile, float scale, float offset ) {
100 try {
101 FileCacheSeekableStream fss = new FileCacheSeekableStream( dataFile.toURL().openStream() );
102 TIFFImage tiff = new TIFFImage( fss, new TIFFDecodeParam(), 0 );
103 db = tiff.getData().getDataBuffer();
104 width = tiff.getWidth();
105 height = tiff.getHeight();
106 } catch ( Exception e ) {
107 e.printStackTrace();
108 }
109 this.scale = scale;
110 this.offset = offset;
111 }
112
113 /**
114 *
115 * @param data
116 * image containing DEM data instead color information
117 */
118 public TiffDEMParser( BufferedImage data ) {
119 this( data, 1, 0 );
120 }
121
122 /**
123 *
124 * @param data
125 * image containing DEM data instead color information
126 * @param scale
127 * scale factor; newHeight[i][j] = height[i][j] * scale
128 */
129 public TiffDEMParser( BufferedImage data, float scale ) {
130 this( data, scale, 0 );
131 }
132
133 /**
134 *
135 * @param data
136 * @param scale
137 * scale factor; newHeight[i][j] = height[i][j] * scale
138 * @param offset
139 * height offset; newHeight[i][j] = height[i][j] + offset
140 */
141 public TiffDEMParser( BufferedImage data, float scale, float offset ) {
142 this.db = data.getRaster().getDataBuffer();
143 this.scale = scale;
144 this.offset = offset;
145 width = data.getWidth();
146 height = data.getHeight();
147 }
148
149 /**
150 * returns the DEM heights as float matrix
151 *
152 * @return the DEM heights as float matrix
153 */
154 public float[][] parse() {
155
156 float[][] terrain = new float[height][width];
157
158 for ( int j = 0; j < height; j++ ) {
159 for ( int i = 0; i < width; i++ ) {
160 terrain[j][i] = db.getElemFloat( width * j + i ) * scale + offset;
161 }
162 }
163
164 return terrain;
165
166 }
167
168 }