svn-gvsig-desktop / tags / gvSIGv0_6_1RELEASE / libraries / libjni-gdal / src / es / gva / cit / jgdal / Gdal.java @ 5222
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/**********************************************************************
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* $Id: Gdal.java 5222 2006-05-16 15:40:43Z $
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*
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* Name: Gdal.java
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* Project: JGDAL. Interface java to gdal (Frank Warmerdam).
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* Purpose: Dataset's Basic Funcions.
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* Author: Nacho Brodin, brodin_ign@gva.es
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*
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**********************************************************************/
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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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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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*
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* [01] 01-Oct-2005 nbt New call to JNI function openArrayNat to convert name string to char array.
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*/
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package es.gva.cit.jgdal; |
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import java.io.*; |
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import java.util.Date; |
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//import es.gva.cit.jgdal.GdalException;
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/**
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* Contiene las funcionalidades necesarias para el acceso a los
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* elementos de un dataset de gdal correspondiente a una im?gen
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*
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* @author Nacho Brodin <brodin_ign@gva.es>.<BR> Equipo de desarrollo gvSIG.<BR> http://www.gvsig.gva.es
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* @version 0.0
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* @link http://www.gvsig.gva.es
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*/
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public class Gdal extends JNIBase{ |
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//CONSTANTES
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//GDALAccess
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public static int GA_ReadOnly=0; |
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public static int GA_Update=1; |
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//GDALDataType
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public static int GDT_Unknown = 0; |
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public static int GDT_Byte = 1; //Buffer byte (8) |
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public static int GDT_UInt16 = 2; //Buffer short (16) |
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public static int GDT_Int16 = 3; //Buffer short (16) |
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public static int GDT_UInt32 = 4; //Buffer int (32) |
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public static int GDT_Int32 = 5; //Buffer int (32) |
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public static int GDT_Float32 = 6; //Buffer float (32) |
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public static int GDT_Float64 = 7; //Buffer double (64) |
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public static int GDT_CInt16 = 8; //Buffer short (16) |
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public static int GDT_CInt32 = 9; //Buffer int (32) |
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public static int GDT_CFloat32 = 10; //Buffer float (32) |
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public static int GDT_CFloat64 = 11; //Buffer double (64) |
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public static int GDT_TypeCount = 12; |
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private String pszFilename = ""; |
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private native long openNat(String pszFilename, int access); |
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private native long openArrayNat(byte[] pszFilename, int access); |
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private native int getGeoTransformNat(long cPtr,GeoTransform adfgeotransform); |
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private native int setGeoTransformNat(long cPtr,GeoTransform adfgeotransform); |
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private native String[] getMetadataNat(long cPtr,String pszDomain); |
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private native String getProjectionRefNat(long cPtr); |
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private native void closeNat(long cPtr); |
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private native int getRasterBandNat(long cPtr,int hBand); |
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private native int setProjectionNat(long cPtr, String proj); |
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private native String getDriverShortNameNat(long cPtr); |
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//private static native long getGDALDriverManagerNat();
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private static native long getDriverByNameNat(String name); |
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/**
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*Constructor a partir de la direcci?n de memoria
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*/
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public Gdal(long cPtr){ |
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this.cPtr=cPtr;
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} |
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/**
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*Constructor generico
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*/
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public Gdal(){}
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/**
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* Devuelve la direcci?n de memoria del objeto dataset en C.
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*/
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public long getPtro(){return cPtr;} |
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/**
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* Abre el fichero de im?gen.
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*
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* @param pszFilename Nombre del fichero.
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* @param access Apertura en solo lectura o escritura.
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* @throws GdalException
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*/
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public void open(String pszFilename, int access)throws GdalException, IOException{ |
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File f = new File( pszFilename ); |
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if(!f.exists())
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throw new IOException("El archivo "+pszFilename+" no existe"); |
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if(!f.canRead())
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throw new IOException("El archivo no puede leerse"); |
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cPtr=openArrayNat(pszFilename.getBytes(), access); |
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//cPtr=openNat(pszFilename, access);
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if(cPtr<=0) |
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throw new GdalException("Error en Open de GDAL"); |
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} |
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/**
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* Obtiene un array de Strings con los metadatos
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*
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* @throws GdalException
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* @return Array de Strings que corresponden a los metadatos que ofrece la im?gen
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*/
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public String[] getMetadata()throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en GDALGetMetadata(). La llamada GDALOpen no tuvo exito"); |
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String[] res = getMetadataNat(cPtr,null); |
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if(res == null) |
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return new String[0]; |
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else return res; |
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} |
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/**
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* Obtiene el n?mero de bandas de la im?gen
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*
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* @throws GdalException
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* @param hBand Entero que corresponde al n?mero de banda que se quiere recuperar
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* @return Objeto GdalRasterBand que representa la banda recuperada
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*/
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public GdalRasterBand getRasterBand(int hBand)throws GdalException{ |
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long cPtr_rb;
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if(cPtr <= 0) |
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throw new GdalException("Error en GDALGetRasterBand(). La llamada GDALOpen no tuvo exito"); |
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cPtr_rb = getRasterBandNat(cPtr,hBand); |
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if(cPtr_rb < 0) |
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throw new GdalException("Error en GetRasterBand(). No ha podido obtenerse una banda"); |
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else return new GdalRasterBand(cPtr_rb); |
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} |
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/**
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* Obtiene la dimensi?n del raster en el eje X.
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*
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* @return Devuelve un entero con la longitud de la im?gen en el eje X en pixels.
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* @throws GdalException
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*/
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public int getRasterXSize()throws GdalException{ |
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String msg1="Error en GDALGetRasterXSize. La llamada GDALOpen no tuvo ?xito"; |
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String msg2="Error en tama?o X"; |
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return baseSimpleFunctions(5,msg1,msg2); |
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} |
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/**
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* Obtiene la dimensi?n del raster en el eje Y.
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*
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* @return Devuelve un entero con la longitud de la im?gen en el eje Y en pixels.
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* @throws GdalException
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*/
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public int getRasterYSize()throws GdalException{ |
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String msg1="Error en GDALGetRasterYSize. La llamada GDALOpen no tuvo ?xito"; |
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String msg2="Error en tama?o Y"; |
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return baseSimpleFunctions(6,msg1,msg2); |
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} |
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/**
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* Obtiene el n?mero de bandas de la im?gen
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*
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* @return Devuelve un entero con el n?mero de bandas que contiene la im?gen.
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* @throws GdalException
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*/
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public int getRasterCount()throws GdalException{ |
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String msg1="Error en GDALGetRasterCount. . La llamada GDALOpen no tuvo ?xito"; |
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String msg2="Error en el conteo de n?mero de bandas"; |
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return baseSimpleFunctions(7,msg1,msg2); |
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} |
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/**
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* Obtiene el vector geoTransform de la im?gen que contiene los valores Origen y pixelSize
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*
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* @return Devuelve un vector de doubles que contiene los valores de coordenadas de origen y pixelSize.
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* @throws GdalException
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*/
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public GeoTransform getGeoTransform()throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en getGeoTransform(). La llamada Open no tuvo exito"); |
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GeoTransform gt=new GeoTransform();
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if(getGeoTransformNat(cPtr,gt)<0) |
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throw new GdalException("Error en getGeoTransform(). No se han obtenido valores para geoTransform."); |
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else{
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return gt;
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} |
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} |
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/**
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* Obtiene el Nombre corto asociado al driver del dataset
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*
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* @return Cadena con el nombre del driver
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* @throws GdalException
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*/
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public String getDriverShortName()throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en getDriverShortName(). La llamada Open no tuvo exito"); |
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String shortName = getDriverShortNameNat(cPtr);
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if(shortName == null) |
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throw new GdalException("Error en getDriverShortName(). No ha podido obtenerse el driver"); |
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else
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return shortName;
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} |
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/**
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* A?ade el vector geoTransform a la im?gen que contiene los valores Origen y pixelSize
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*
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* @return Devuelve un vector de doubles que contiene los valores de coordenadas de origen y pixelSize.
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* @throws GdalException
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*/
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public void setGeoTransform(GeoTransform gt)throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en setGeoTransform(). La llamada Open no tuvo exito"); |
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int res = setGeoTransformNat(cPtr,gt);
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if(res<0) |
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throw new GdalException("Error en getGeoTransform(). No se ha podido a?adir valores para geoTransform. Es posible que el formato no lo soporte."); |
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} |
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/**
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* Obtiene el sistema de coordenadas de referencia de la im?gen.
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*
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* @return Devuelve un String con los datos del sistema de coordenadas de referencia.
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* @throws GdalException
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*/
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public String getProjectionRef()throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en getGetProjectionRef(). La llamada Open no tuvo exito"); |
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String res = getProjectionRefNat(cPtr);
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if(res == null)return new String(""); |
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else return res; |
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} |
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/**
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* Cierra el fichero de im?gen.
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*
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* @throws GdalException
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*/
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public void close()throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en Close(). La llamada Open no tuvo exito"); |
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closeNat(cPtr); |
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} |
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/**
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* Obtiene un driver a trav?s de su nombre
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*
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* @param name Nombre del driver
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*/
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public static GdalDriver getDriverByName(String name)throws GdalException{ |
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long ptrdrv=-1; |
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ptrdrv=getDriverByNameNat(name); |
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//System.out.println("ptrdrv="+ptrdrv);
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if(ptrdrv > 0) |
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return (new GdalDriver(ptrdrv)); |
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else
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throw new GdalException("Error en getDriverByName(). No se ha podido obtener el driver."); |
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} |
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/**
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* Obtiene el n?mero de bandas de la im?gen
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*
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* @return Devuelve un entero con el n?mero de bandas que contiene la im?gen.
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* @throws GdalException
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*/
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public int getGCPCount()throws GdalException{ |
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String msg1="Error en GDALGetRasterCount. . La llamada GDALOpen no tuvo ?xito"; |
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String msg2="Error en el conteo de n?mero de bandas"; |
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return baseSimpleFunctions(8,msg1,msg2); |
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} |
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/**
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*Asigna la proyecci?n especificada en la cadena que se le pasa por par?metro.
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*@param proj proyecci?n
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*@throws GdalException
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*/
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public void setProjection(String proj)throws GdalException{ |
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if(cPtr <= 0) |
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throw new GdalException("Error en setProjection(). La llamada Open no tuvo exito"); |
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int res = setProjectionNat(cPtr, proj);
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if(res<0) |
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throw new GdalException("Error en setProjection(). No se ha podido asignar la proyecci?n."); |
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} |
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} |