svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / io / GeoRasterFile.java @ 8281
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/*
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* Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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*
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* Copyright (C) 2004-5.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* cresques@gmail.com
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*/
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package org.cresques.io; |
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import java.awt.Component; |
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import java.awt.Dimension; |
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import java.awt.Image; |
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import java.awt.geom.Point2D; |
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import java.awt.image.DataBuffer; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileReader; |
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import java.io.FileWriter; |
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import java.io.IOException; |
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.InvocationTargetException; |
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import java.util.TreeMap; |
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import org.cresques.cts.ICoordTrans; |
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import org.cresques.cts.IProjection; |
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import org.cresques.filter.PixelFilter; |
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import org.cresques.filter.SimplePixelFilter; |
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import org.cresques.io.data.Metadata; |
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import org.cresques.io.data.RasterMetaFileTags; |
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import org.cresques.px.Extent; |
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import org.cresques.px.IObjList; |
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import org.cresques.px.PxContour; |
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import org.cresques.px.PxObjList; |
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import org.kxml2.io.KXmlParser; |
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import org.xmlpull.v1.XmlPullParserException; |
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/**
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* Manejador de ficheros raster georeferenciados.
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*
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* Esta clase abstracta es el ancestro de todas las clases que proporcionan
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* soporte para ficheros raster georeferenciados.<br>
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* Actua tambien como una 'Fabrica', ocultando al cliente la manera en que
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* se ha implementado ese manejo. Una clase nueva que soportara un nuevo
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* tipo de raster tendr?a que registrar su extensi?n o extensiones usando
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* el m?todo @see registerExtension.<br>
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>*
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*/
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public abstract class GeoRasterFile extends GeoFile { |
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/**
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* Flag que representa a la banda del Rojo
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*/
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public static final int RED_BAND = 0x01; |
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/**
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* Flag que representa a la banda del Verde
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*/
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public static final int GREEN_BAND = 0x02; |
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/**
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* Flag que representa a la banda del Azul
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*/
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public static final int BLUE_BAND = 0x04; |
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private static TreeMap supportedExtensions = null; |
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protected Component updatable = null; |
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protected boolean doTransparency = false; |
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private boolean verifySize = false; |
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/**
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* Filtro para raster.
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* Permite eliminar la franja inutil alrededor de un raster girado o de
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* un mosaico de borde irregular.
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*
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* Funciona bien solo con raster en tonos de gris, porque se basa que
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* el valor del pixel no supere un determinado valor 'umbral' que se
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* le pasa al constructor.
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*
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* Desarrollado para 'limpiar' los bordes de los mosaicos del SIG
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* Oleicola. Para ese caso los par?metros del constructo son:
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* PixelFilter(0x10ffff00, 0xff000000, 0xf0f0f0);
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*/
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protected PixelFilter tFilter = null; |
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/**
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* Asignaci?n de banda del Rojo a una banda de la imagen
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*/
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protected int rBandNr = 1; |
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/**
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* Asignaci?n de banda del Verde a una banda de la imagen
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*/
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protected int gBandNr = 1; |
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/**
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* Asignaci?n de banda del Azul a una banda de la imagen
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*/
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protected int bBandNr = 1; |
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/**
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* N?mero de bandas de la imagen
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*/
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protected int bandCount = 1; |
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private int dataType = DataBuffer.TYPE_BYTE; |
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/**
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* Par?metros de transformaci?n del fichero .rmf. Estas variables tendr?n valores distinto
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* de 0 si la funci?n rmfExists() devuelve true.
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*/
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protected double originX = 0D, originY = 0D, w = 0D, h = 0D; |
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protected double pixelSizeX = 0D, pixelSizeY = 0D; |
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protected double imageWidth = 0D, imageHeight = 0D; |
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protected double shearX = 0D, shearY = 0D; |
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static {
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supportedExtensions = new TreeMap(); |
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supportedExtensions.put("ecw", EcwFile.class);
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supportedExtensions.put("jp2", EcwFile.class);
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supportedExtensions.put("sid", MrSidFile.class);
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supportedExtensions.put("bmp", GdalFile.class);
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supportedExtensions.put("gif", GdalFile.class);
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supportedExtensions.put("img", GdalFile.class);
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supportedExtensions.put("tif", GdalFile.class);
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supportedExtensions.put("tiff", GdalFile.class);
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supportedExtensions.put("jpg", GdalFile.class);
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supportedExtensions.put("png", GdalFile.class);
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//supportedExtensions.put("jpg", TifGeoRefFile.class);
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//supportedExtensions.put("png", TifGeoRefFile.class);
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//supportedExtensions.put("dat", GdalFile.class);
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} |
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/**
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* Factoria para abrir distintos tipos de raster.
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*
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* @param proj Proyecci?n en la que est? el raster.
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* @param fName Nombre del fichero.
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* @return GeoRasterFile, o null si hay problemas.
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*/
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public static GeoRasterFile openFile(IProjection proj, String fName) { |
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String ext = fName.toLowerCase().substring(fName.lastIndexOf('.')+1); |
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GeoRasterFile grf = null;
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// TODO NotSupportedExtensionException
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if (!supportedExtensions.containsKey(ext)) return grf; |
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/**/
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Class clase = (Class) supportedExtensions.get(ext); |
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Class [] args = {IProjection.class, String.class}; |
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try {
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Constructor hazNuevo = clase.getConstructor(args);
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Object [] args2 = {proj, fName}; |
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grf = (GeoRasterFile) hazNuevo.newInstance(args2); |
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grf.setFileSize(new File(fName).length()); |
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} catch (SecurityException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (NoSuchMethodException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (IllegalArgumentException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (InstantiationException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (IllegalAccessException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (InvocationTargetException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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return grf;
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} |
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/**
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* Registra una clase que soporta una extensi?n raster.
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* @param ext extensi?n soportada.
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* @param clase clase que la soporta.
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*/
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public static void registerExtension(String ext, Class clase) { |
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ext = ext.toLowerCase(); |
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System.out.println("RASTER: extension '"+ext+"' supported."); |
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supportedExtensions.put(ext, clase); |
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} |
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/**
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* Tipo de fichero soportado.
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* Devuelve true si el tipo de fichero (extension) est? soportado, si no
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* devuelve false.
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*
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* @param fName Fichero raster
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* @return true si est? soportado, si no false.
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*/
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public static boolean fileIsSupported(String fName) { |
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String ext = fName.toLowerCase().substring(fName.lastIndexOf('.')+1); |
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return supportedExtensions.containsKey(ext);
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} |
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/**
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* Constructor
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* @param proj Proyecci?n
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* @param name Nombre del fichero de imagen.
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*/
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public GeoRasterFile(IProjection proj, String name) { |
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super(proj, name);
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} |
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/**
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* Carga un fichero raster. Puede usarse para calcular el extent e instanciar
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* un objeto de este tipo.
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*/
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abstract public GeoFile load(); |
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/**
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* Cierra el fichero y libera los recursos.
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*/
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abstract public void close(); |
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/**
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* Obtiene la codificaci?n del fichero XML
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* @param file Nombre del fichero XML
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* @return Codificaci?n
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*/
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private String readFileEncoding(String file){ |
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FileReader fr;
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String encoding = null; |
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try
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{
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fr = new FileReader(file); |
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BufferedReader br = new BufferedReader(fr); |
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char[] buffer = new char[100]; |
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br.read(buffer); |
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StringBuffer st = new StringBuffer(new String(buffer)); |
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String searchText = "encoding=\""; |
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int index = st.indexOf(searchText);
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if (index>-1) { |
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st.delete(0, index+searchText.length());
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encoding = st.substring(0, st.indexOf("\"")); |
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} |
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fr.close(); |
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} catch(FileNotFoundException ex) { |
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ex.printStackTrace(); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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return encoding;
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} |
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private double[] parserExtent(KXmlParser parser) throws XmlPullParserException, IOException { |
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double originX = 0D, originY = 0D, w = 0D, h = 0D; |
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double pixelSizeX = 0D, pixelSizeY = 0D; |
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double shearX = 0D, shearY = 0D; |
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boolean end = false; |
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int tag = parser.next();
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while (!end) {
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switch(tag) {
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case KXmlParser.START_TAG:
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if(parser.getName() != null){ |
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if (parser.getName().equals(RasterMetaFileTags.POSX)){
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originX = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.POSY)){ |
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originY = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.PX_SIZE_X)){ |
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pixelSizeX = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.PX_SIZE_Y)){ |
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pixelSizeY = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.ROTX)){ |
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shearX = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.ROTY)){ |
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shearY = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.WIDTH)){ |
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w = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.HEIGHT)){ |
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h = Double.parseDouble(parser.nextText());
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} |
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} |
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break;
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case KXmlParser.END_TAG:
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if (parser.getName().equals(RasterMetaFileTags.BBOX))
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end = true;
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break;
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case KXmlParser.TEXT:
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break;
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} |
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tag = parser.next(); |
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} |
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double[] values = {originX, originY, w, h, pixelSizeX, pixelSizeY, shearX, shearY}; |
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return values;
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} |
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/**
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* Obtiene la informaci?n de georreferenciaci?n asociada a la imagen en un fichero .rmf. Esta
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* georreferenciaci?n tiene la caracteristica de que tiene prioridad sobre la de la imagen.
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* Es almacenada en la clase GeoFile en la variable virtualExtent.
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* @param file Fichero de metadatos .rmf
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*/
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protected void readGeoInfo(String file){ |
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String rmf = file.substring(0, file.lastIndexOf(".") + 1) + "rmf"; |
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File rmfFile = new File(rmf); |
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if(!rmfFile.exists())
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return;
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boolean georefOk = false; |
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FileReader fr = null; |
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String v = null; |
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try {
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fr = new FileReader(rmf); |
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KXmlParser parser = new KXmlParser();
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parser.setInput(new FileInputStream(rmf), readFileEncoding(rmf)); |
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int tag = parser.nextTag();
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if ( parser.getEventType() != KXmlParser.END_DOCUMENT ){
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parser.require(KXmlParser.START_TAG, null, RasterMetaFileTags.MAIN_TAG);
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while(tag != KXmlParser.END_DOCUMENT) {
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switch(tag) {
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case KXmlParser.START_TAG:
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if (parser.getName().equals(RasterMetaFileTags.LAYER)) {
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int layerListTag = parser.next();
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boolean geoRefEnd = false; |
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while (!geoRefEnd){
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if(parser.getName() != null){ |
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if (parser.getName().equals(RasterMetaFileTags.PROJ)){
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//System.out.println("PROJ:"+parser.nextText());
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} else if (parser.getName().equals(RasterMetaFileTags.BBOX)){ |
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double[] values = parserExtent(parser); |
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originX = values[0];
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originY = values[1];
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w = values[2];
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h = values[3];
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pixelSizeX = values[4];
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pixelSizeY = values[5];
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shearX = values[6];
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shearY = values[7];
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georefOk = true;
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} else if (parser.getName().equals(RasterMetaFileTags.DIM)){ |
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boolean DimEnd = false; |
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while (!DimEnd){
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layerListTag = parser.next(); |
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if(parser.getName() != null){ |
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if (parser.getName().equals(RasterMetaFileTags.PX_WIDTH)){
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imageWidth = Double.parseDouble(parser.nextText());
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}else if (parser.getName().equals(RasterMetaFileTags.PX_HEIGHT)){ |
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imageHeight = Double.parseDouble(parser.nextText());
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DimEnd = true;
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} |
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} |
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} |
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geoRefEnd = true;
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} |
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} |
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layerListTag = parser.next(); |
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} |
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} |
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break;
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case KXmlParser.END_TAG:
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break;
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case KXmlParser.TEXT:
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break;
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} |
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tag = parser.next(); |
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} |
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parser.require(KXmlParser.END_DOCUMENT, null, null); |
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} |
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if(georefOk){
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rmfExists = true;
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setExtentTransform(originX, originY, w, h, pixelSizeX, pixelSizeY); |
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createExtentsFromRMF( originX, originY, pixelSizeX, pixelSizeY, |
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imageWidth, imageHeight, shearX, shearY); |
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} |
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} catch (FileNotFoundException fnfEx) { |
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} catch (XmlPullParserException xmlEx) {
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xmlEx.printStackTrace(); |
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} catch (IOException e) { |
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} |
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try{
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if(fr != null) |
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fr.close(); |
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}catch(IOException ioEx){ |
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//No est? abierto el fichero por lo que no hacemos nada
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} |
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} |
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/**
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* <P>
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* Calcula el extent de la imagen a partir del fichero rmf con y sin rotaci?n. El extent con rotaci?n corresponde
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* a la variable extent que contiene el extent verdadero marcado por el fichero de georreferenciaci?n .rmf. El extent
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* sin rotaci?n requestExtent es utilizado para realizar la petici?n ya que la petici?n al driver no se puede
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* hacer con coordenadas rotadas.
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*
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* El calculo de la bounding box rotada lo hace con los valores de transformaci?n leidos desde el fichero .rmf.
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* </p>
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* <P>
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* Para el calculo de una esquina aplicamos la formula siguiente:<BR>
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* PtoX = originX + pixelSizeX * x + shearX * y;<BR>
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* PtoY = originY + shearY * x + pixelSizeY * y;<BR>
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* Aplicandolo a las cuatro esquinas sustituimos en cada una de ellas por.
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* </P>
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* <UL>
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* <LI>Esquina superior izquierda: x = 0; y = 0;</LI>
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* <LI>Esquina superior derecha: x = MaxX; y = 0;</LI>
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* <LI>Esquina inferior izquierda: x = 0; y = MaxY;</LI>
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* <LI>Esquina inferior derecha: x = MaxX; y = MaxY;</LI>
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* </UL>
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* <P>
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* quedandonos en los cuatro casos:
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* </P>
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* <UL>
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* <LI>Esquina superior izquierda: originX; originY;</LI>
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* <LI>Esquina superior derecha: PtoX = originX + pixelSizeX * x; PtoY = originY + shearY * x;</LI>
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* <LI>Esquina inferior izquierda: PtoX = originX + shearX * y; PtoY = originY + pixelSizeY * y;</LI>
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* <LI>Esquina inferior derecha: PtoX = originX + pixelSizeX * x + shearX * y; PtoY = originY + shearY * x + pixelSizeY * y;</LI>
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* </UL>
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*
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* <P>
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* El calculo de la bounding box se realizar? de la misma forma pero anulando los parametros de shearing.
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* </P>
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*
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* @param originX Coordenada X de origen del raster
|
| 443 |
* @param originY Coordenada Y de origen del raster
|
| 444 |
* @param pixelSizeX Tama?o de pixel en X
|
| 445 |
* @param pixelSizeY Tama?o de pixel en Y
|
| 446 |
* @param imageWidth Ancho del raster en pixels
|
| 447 |
* @param imageHeight Alto del raster en pixels
|
| 448 |
* @param shearX Shearing en X
|
| 449 |
* @param shearY Shearing en Y
|
| 450 |
*/
|
| 451 |
private void createExtentsFromRMF( double originX, double originY, double pixelSizeX, double pixelSizeY, |
| 452 |
double imageWidth, double imageHeight, double shearX, double shearY){ |
| 453 |
|
| 454 |
Point2D p1 = new Point2D.Double(originX, originY); |
| 455 |
Point2D p2 = new Point2D.Double(originX + shearX * imageHeight, originY + pixelSizeY * imageHeight); |
| 456 |
Point2D p3 = new Point2D.Double(originX + pixelSizeX * imageWidth, originY + shearY * imageWidth); |
| 457 |
Point2D p4 = new Point2D.Double(originX + pixelSizeX * imageWidth + shearX * imageHeight, originY + pixelSizeY * imageHeight + shearY * imageWidth); |
| 458 |
|
| 459 |
double minX = Math.min(Math.min(p1.getX(), p2.getX()), Math.min(p3.getX(), p4.getX())); |
| 460 |
double minY = Math.min(Math.min(p1.getY(), p2.getY()), Math.min(p3.getY(), p4.getY())); |
| 461 |
double maxX = Math.max(Math.max(p1.getX(), p2.getX()), Math.max(p3.getX(), p4.getX())); |
| 462 |
double maxY = Math.max(Math.max(p1.getY(), p2.getY()), Math.max(p3.getY(), p4.getY())); |
| 463 |
extent = new Extent(minX, minY, maxX, maxY);
|
| 464 |
requestExtent = new Extent(originX, originY, originX + (pixelSizeX * imageWidth), originY + (pixelSizeY * imageHeight));
|
| 465 |
} |
| 466 |
|
| 467 |
/**
|
| 468 |
* Calcula la transformaci?n que se produce sobre la vista cuando la imagen tiene un fichero .rmf
|
| 469 |
* asociado. Esta transformaci?n tiene diferencias entre los distintos formatos por lo que debe calcularla
|
| 470 |
* el driver correspondiente.
|
| 471 |
* @param originX Origen de la imagen en la coordenada X
|
| 472 |
* @param originY Origen de la imagen en la coordenada Y
|
| 473 |
*/
|
| 474 |
abstract public void setExtentTransform(double originX, double originY, double w, double h, double psX, double psY); |
| 475 |
|
| 476 |
public static PxContour getContour(String fName, String name, IProjection proj) { |
| 477 |
PxContour contour = null;
|
| 478 |
return contour;
|
| 479 |
} |
| 480 |
|
| 481 |
/**
|
| 482 |
* Obtiene el ancho de la imagen
|
| 483 |
* @return Ancho de la imagen
|
| 484 |
*/
|
| 485 |
abstract public int getWidth(); |
| 486 |
|
| 487 |
/**
|
| 488 |
* Obtiene el ancho de la imagen
|
| 489 |
* @return Ancho de la imagen
|
| 490 |
*/
|
| 491 |
abstract public int getHeight(); |
| 492 |
|
| 493 |
/**
|
| 494 |
* Reproyecci?n.
|
| 495 |
* @param rp Coordenadas de la transformaci?n
|
| 496 |
*/
|
| 497 |
abstract public void reProject(ICoordTrans rp); |
| 498 |
|
| 499 |
/**
|
| 500 |
* Asigna un nuevo Extent
|
| 501 |
* @param e Extent
|
| 502 |
*/
|
| 503 |
abstract public void setView(Extent e); |
| 504 |
|
| 505 |
/**
|
| 506 |
* Obtiene el extent asignado
|
| 507 |
* @return Extent
|
| 508 |
*/
|
| 509 |
abstract public Extent getView(); |
| 510 |
|
| 511 |
public void setTransparency(boolean t) { |
| 512 |
doTransparency = t; |
| 513 |
tFilter = new PixelFilter(255); |
| 514 |
} |
| 515 |
|
| 516 |
/**
|
| 517 |
* Asigna un valor de transparencia
|
| 518 |
* @param t Valor de transparencia
|
| 519 |
*/
|
| 520 |
public void setTransparency(int t ) { |
| 521 |
doTransparency = true;
|
| 522 |
tFilter = new SimplePixelFilter(255 - t); |
| 523 |
} |
| 524 |
|
| 525 |
public boolean getTransparency() { return doTransparency; } |
| 526 |
|
| 527 |
public void setAlpha(int alpha) { |
| 528 |
if (!doTransparency) setTransparency(255 - alpha); |
| 529 |
else tFilter.setAlpha(alpha);
|
| 530 |
} |
| 531 |
public int getAlpha() { |
| 532 |
if (tFilter == null) |
| 533 |
return 255; |
| 534 |
return tFilter.getAlpha();
|
| 535 |
} |
| 536 |
|
| 537 |
public void setUpdatable(Component c) { updatable = c; } |
| 538 |
|
| 539 |
/**
|
| 540 |
* Actualiza la imagen
|
| 541 |
* @param width ancho
|
| 542 |
* @param height alto
|
| 543 |
* @param rp Reproyecci?n
|
| 544 |
* @return img
|
| 545 |
*/
|
| 546 |
abstract public Image updateImage(int width, int height, ICoordTrans rp); |
| 547 |
|
| 548 |
/**
|
| 549 |
* Obtiene el valor del raster en la coordenada que se le pasa.
|
| 550 |
* El valor ser? Double, Int, Byte, etc. dependiendo del tipo de
|
| 551 |
* raster.
|
| 552 |
* @param x coordenada X
|
| 553 |
* @param y coordenada Y
|
| 554 |
* @return
|
| 555 |
*/
|
| 556 |
abstract public Object getData(int x, int y, int band); |
| 557 |
|
| 558 |
/**
|
| 559 |
* Actualiza la/s banda/s especificadas en la imagen.
|
| 560 |
* @param width ancho
|
| 561 |
* @param height alto
|
| 562 |
* @param rp reproyecci?n
|
| 563 |
* @param img imagen
|
| 564 |
* @param flags que bandas [ RED_BAND | GREEN_BAND | BLUE_BAND ]
|
| 565 |
* @return img
|
| 566 |
* @throws SupersamplingNotSupportedException
|
| 567 |
*/
|
| 568 |
abstract public Image updateImage(int width, int height, ICoordTrans rp, Image img, int origBand, int destBand)throws SupersamplingNotSupportedException; |
| 569 |
|
| 570 |
public int getBandCount() { return bandCount; } |
| 571 |
|
| 572 |
/**
|
| 573 |
* Asocia un colorBand al rojo, verde o azul.
|
| 574 |
* @param flag cual (o cuales) de las bandas.
|
| 575 |
* @param nBand que colorBand
|
| 576 |
*/
|
| 577 |
|
| 578 |
public void setBand(int flag, int bandNr) { |
| 579 |
if ((flag & GeoRasterFile.RED_BAND) == GeoRasterFile.RED_BAND) rBandNr = bandNr;
|
| 580 |
if ((flag & GeoRasterFile.GREEN_BAND) == GeoRasterFile.GREEN_BAND) gBandNr = bandNr;
|
| 581 |
if ((flag & GeoRasterFile.BLUE_BAND) == GeoRasterFile.BLUE_BAND) bBandNr = bandNr;
|
| 582 |
} |
| 583 |
|
| 584 |
/**
|
| 585 |
* Devuelve el colorBand activo en la banda especificada.
|
| 586 |
* @param flag banda.
|
| 587 |
*/
|
| 588 |
|
| 589 |
public int getBand(int flag) { |
| 590 |
if (flag == GeoRasterFile.RED_BAND) return rBandNr; |
| 591 |
if (flag == GeoRasterFile.GREEN_BAND) return gBandNr; |
| 592 |
if (flag == GeoRasterFile.BLUE_BAND) return bBandNr; |
| 593 |
return -1; |
| 594 |
} |
| 595 |
|
| 596 |
/**
|
| 597 |
* @return Returns the dataType.
|
| 598 |
*/
|
| 599 |
public int getDataType() { |
| 600 |
return dataType;
|
| 601 |
} |
| 602 |
|
| 603 |
/**
|
| 604 |
* @param dataType The dataType to set.
|
| 605 |
*/
|
| 606 |
public void setDataType(int dataType) { |
| 607 |
this.dataType = dataType;
|
| 608 |
} |
| 609 |
|
| 610 |
public IObjList getObjects() {
|
| 611 |
// TODO hay que a?adir el raster a la lista de objetos
|
| 612 |
IObjList oList = new PxObjList(proj);
|
| 613 |
return oList;
|
| 614 |
} |
| 615 |
|
| 616 |
/**
|
| 617 |
* Calcula los par?metros de un worl file a partir de las esquinas del raster.
|
| 618 |
* 1. X pixel size A
|
| 619 |
* 2. X rotation term D
|
| 620 |
* 3. Y rotation term B
|
| 621 |
* 4. Y pixel size E
|
| 622 |
* 5. X coordinate of upper left corner C
|
| 623 |
* 6. Y coordinate of upper left corner F
|
| 624 |
* where the real-world coordinates x',y' can be calculated from
|
| 625 |
* the image coordinates x,y with the equations
|
| 626 |
* x' = Ax + By + C and y' = Dx + Ey + F.
|
| 627 |
* The signs of the first 4 parameters depend on the orientation
|
| 628 |
* of the image. In the usual case where north is more or less
|
| 629 |
* at the top of the image, the X pixel size will be positive
|
| 630 |
* and the Y pixel size will be negative. For a south-up image,
|
| 631 |
* these signs would be reversed.
|
| 632 |
*
|
| 633 |
* You can calculate the World file parameters yourself based
|
| 634 |
* on the corner coordinates. The X and Y pixel sizes can be
|
| 635 |
* determined simply by dividing the distance between two
|
| 636 |
* adjacent corners by the number of columns or rows in the image.
|
| 637 |
* The rotation terms are calculated with these equations:
|
| 638 |
*
|
| 639 |
* # B = (A * number_of_columns + C - lower_right_x') / number_of_rows * -1
|
| 640 |
* # D = (E * number_of_rows + F - lower_right_y') / number_of_columns * -1
|
| 641 |
*
|
| 642 |
* @param corner (tl, tr, br, bl)
|
| 643 |
* @return
|
| 644 |
*/
|
| 645 |
public static double [] cornersToWorldFile(Point2D [] esq, Dimension size) { |
| 646 |
double a=0,b=0,c=0,d=0,e=0,f=0; |
| 647 |
double x1 = esq[0].getX(), y1 = esq[0].getY(); |
| 648 |
double x2 = esq[1].getX(), y2 = esq[1].getY(); |
| 649 |
double x3 = esq[2].getX(), y3 = esq[2].getY(); |
| 650 |
double x4 = esq[3].getX(), y4 = esq[3].getY(); |
| 651 |
// A: X-scale
|
| 652 |
a = Math.abs( Math.sqrt( (x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)) |
| 653 |
/ size.getWidth()); |
| 654 |
|
| 655 |
// E: negative Y-scale
|
| 656 |
e = - Math.abs(Math.sqrt((x1-x4)*(x1-x4)+ |
| 657 |
(y1-y4)*(y1-y4))/size.getHeight()); |
| 658 |
|
| 659 |
// C, F: upper-left coordinates
|
| 660 |
c = x1; |
| 661 |
f = y1; |
| 662 |
|
| 663 |
// B & D: rotation parameters
|
| 664 |
b = (a * size.getWidth() + c - x3 ) / size.getHeight() * -1;
|
| 665 |
d = (e * size.getHeight() + f - y3 ) / size.getWidth() * -1;
|
| 666 |
|
| 667 |
double [] wf = {a,d,b,e,c,f}; |
| 668 |
return wf;
|
| 669 |
} |
| 670 |
public static String printWF(String fName, Point2D [] esq, Dimension sz) { |
| 671 |
double [] wf = GeoRasterFile.cornersToWorldFile(esq, sz); |
| 672 |
System.out.println("wf para "+fName); |
| 673 |
System.out.println(esq+"\n"+sz); |
| 674 |
String wfData = ""; |
| 675 |
for (int i=0; i<6; i++) |
| 676 |
wfData += wf[i]+"\n";
|
| 677 |
System.out.println(wfData);
|
| 678 |
return wfData;
|
| 679 |
} |
| 680 |
|
| 681 |
public static void saveWF(String fName, String data) throws IOException { |
| 682 |
FileWriter fw = new FileWriter(fName); |
| 683 |
fw.write(data); |
| 684 |
fw.flush(); |
| 685 |
fw.close(); |
| 686 |
} |
| 687 |
|
| 688 |
/**
|
| 689 |
* Cosulta si hay que verificar la relaci?n de aspecto de la imagen, es decir comprueba que el ancho/alto
|
| 690 |
* pasados a updateImage coinciden con el ancho/alto solicitado en setView a la imagen
|
| 691 |
* @return true si est? verificando la relaci?n de aspecto.
|
| 692 |
*/
|
| 693 |
public boolean mustVerifySize() { |
| 694 |
return verifySize;
|
| 695 |
} |
| 696 |
|
| 697 |
/**
|
| 698 |
* Asigna el flag que dice si hay que verificar la relaci?n de aspecto de la imagen, es decir
|
| 699 |
* comprueba que el ancho/alto pasados a updateImage coinciden con el ancho/alto solicitado
|
| 700 |
* en setView a la imagen.
|
| 701 |
* @return true si est? verificando la relaci?n de aspecto.
|
| 702 |
*/
|
| 703 |
public void setMustVerifySize(boolean verifySize) { |
| 704 |
this.verifySize = verifySize;
|
| 705 |
} |
| 706 |
|
| 707 |
abstract public byte[] getWindow(int ulX, int ulY, int sizeX, int sizeY, int band); |
| 708 |
abstract public int getBlockSize(); |
| 709 |
|
| 710 |
/**
|
| 711 |
* Obtiene el objeto que contiene los metadatos. Este m?todo debe ser redefinido por los
|
| 712 |
* drivers si necesitan devolver metadatos.
|
| 713 |
* @return
|
| 714 |
*/
|
| 715 |
public Metadata getMetadata(){
|
| 716 |
return null; |
| 717 |
} |
| 718 |
|
| 719 |
/**
|
| 720 |
* Asigna un extent temporal que puede coincidir con el de la vista. Esto es
|
| 721 |
* util para cargar imagenes sin georreferenciar ya que podemos asignar el extent
|
| 722 |
* que queramos para ajustarnos a una vista concreta
|
| 723 |
* @param tempExtent The tempExtent to set.
|
| 724 |
*/
|
| 725 |
public void setExtent(Extent ext) { |
| 726 |
this.extent = ext;
|
| 727 |
} |
| 728 |
|
| 729 |
public boolean isGeoreferenced(){ |
| 730 |
return true; |
| 731 |
} |
| 732 |
|
| 733 |
/**
|
| 734 |
* M?todo que indica si existe un fichero .rmf asociado al GeoRasterFile.
|
| 735 |
* @return
|
| 736 |
*/
|
| 737 |
public boolean rmfExists(){ |
| 738 |
return this.rmfExists; |
| 739 |
} |
| 740 |
|
| 741 |
/**
|
| 742 |
* Obtiene los par?metros de la transformaci?n af?n que corresponde con los elementos de
|
| 743 |
* un fichero tfw.
|
| 744 |
* <UL>
|
| 745 |
* <LI>[1]tama?o de pixel en X</LI>
|
| 746 |
* <LI>[2]rotaci?n en X</LI>
|
| 747 |
* <LI>[4]rotaci?n en Y</LI>
|
| 748 |
* <LI>[5]tama?o de pixel en Y</LI>
|
| 749 |
* <LI>[0]origen en X</LI>
|
| 750 |
* <LI>[3]origen en Y</LI>
|
| 751 |
* </UL>
|
| 752 |
* Este m?todo debe ser reimplementado por el driver si tiene esta informaci?n. En principio
|
| 753 |
* Gdal es capaz de proporcionarla de esta forma.
|
| 754 |
* @return vector de double con los elementos de la transformaci?n af?n.
|
| 755 |
*/
|
| 756 |
public double[] getTransform(){return null;} |
| 757 |
} |