gvsig-raster / org.gvsig.raster.cache / trunk / org.gvsig.raster.cache / org.gvsig.raster.cache.lib.impl / src / main / java / org / gvsig / raster / cache / buffer / impl / io / GdalRead.java @ 995
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package org.gvsig.raster.cache.buffer.impl.io; |
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import java.awt.geom.AffineTransform; |
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import java.io.IOException; |
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import org.gvsig.jgdal.Gdal; |
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import org.gvsig.jgdal.GdalBuffer; |
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import org.gvsig.jgdal.GdalException; |
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import org.gvsig.jgdal.GdalRasterBand; |
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import org.gvsig.jgdal.GeoTransform; |
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import org.gvsig.raster.cache.buffer.Buffer; |
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/**
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* Lectura de datos de un TIFF de disco
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class GdalRead extends Gdal { |
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public GeoTransform trans = null; |
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public int width = 0, height = 0; |
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public double originX = 0D, originY = 0D; |
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protected int rBandNr = 1, gBandNr = 2, bBandNr = 3, aBandNr = 4; |
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private int dataType = 0; |
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protected GdalRasterBand[] gdalBands = null; |
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/**
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* Estado de transparencia del raster.
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*/
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protected AffineTransform ownTransformation = null; |
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private int nBands = 0; |
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public GdalRead(String fName) throws GdalException, IOException { |
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super();
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init(fName); |
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} |
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/**
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* Acciones de inicializaci?n
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* @param fName
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* @throws GdalException
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* @throws IOException
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*/
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private void init(String fName) throws GdalException, IOException { |
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open(fName, GA_ReadOnly); |
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if (getPtro() == -1) |
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throw new GdalException("Error en la apertura del fichero. El fichero no tiene un formato v?lido."); |
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width = getRasterXSize(); |
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height = getRasterYSize(); |
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int[] dt = new int[getRasterCount()]; |
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for (int i = 0; i < getRasterCount(); i++) |
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dt[i] = this.getRasterBand(i + 1).getRasterDataType(); |
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nBands = getRasterCount(); |
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dataType = dt[0];
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try {
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trans = getGeoTransform(); |
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boolean isCorrect = false; |
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for (int i = 0; i < trans.adfgeotransform.length; i++) |
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if (trans.adfgeotransform[i] != 0) |
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isCorrect = true;
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if (!isCorrect)
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throw new GdalException(""); |
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ownTransformation = new AffineTransform(trans.adfgeotransform[1], trans.adfgeotransform[4], trans.adfgeotransform[2], trans.adfgeotransform[5], trans.adfgeotransform[0], trans.adfgeotransform[3]); |
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} catch (GdalException exc) {
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// Transformaci?n para ficheros sin georreferenciaci?n. Se invierte la Y
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// ya que las WC decrecen de
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// arriba a abajo y los pixeles crecen de arriba a abajo
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ownTransformation = new AffineTransform(1, 0, 0, -1, 0, height); |
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} |
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} |
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/**
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* Conversi?n de los tipos de datos de gdal a los tipos de datos de RasterBuf
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* @param gdalType Tipo de dato de gdal
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* @return Tipo de dato de RasterBuf
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*/
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public int getRasterBufTypeFromGdalType(int gdalType) { |
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switch (gdalType) {
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case 1:// Eight bit unsigned integer GDT_Byte = 1 |
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return Buffer.TYPE_BYTE; |
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case 3:// Sixteen bit signed integer GDT_Int16 = 3, |
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return Buffer.TYPE_SHORT; |
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case 2:// Sixteen bit unsigned integer GDT_UInt16 = 2 |
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//return RasterBuffer.TYPE_USHORT;
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return Buffer.TYPE_SHORT; //Apa?o para usar los tipos de datos que soportamos |
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case 5:// Thirty two bit signed integer GDT_Int32 = 5 |
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return Buffer.TYPE_INT; |
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case 6:// Thirty two bit floating point GDT_Float32 = 6 |
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return Buffer.TYPE_FLOAT; |
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case 7:// Sixty four bit floating point GDT_Float64 = 7 |
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return Buffer.TYPE_DOUBLE; |
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// TODO:Estos tipos de datos no podemos gestionarlos. Habria que definir
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// el tipo complejo y usar el tipo long que de momento no se gasta.
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case 4:// Thirty two bit unsigned integer GDT_UInt32 = 4, |
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return Buffer.TYPE_INT; |
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//return RasterBuffer.TYPE_UNDEFINED; // Deberia devolver un Long
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case 8:// Complex Int16 GDT_CInt16 = 8 |
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case 9:// Complex Int32 GDT_CInt32 = 9 |
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case 10:// Complex Float32 GDT_CFloat32 = 10 |
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case 11:// Complex Float64 GDT_CFloat64 = 11 |
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return Buffer.TYPE_UNDEFINED; |
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} |
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return Buffer.TYPE_UNDEFINED; |
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} |
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/**
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* Conversi?n de los tipos de datos de gdal a los tipos de datos de RasterBuf
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* @param gdalType Tipo de dato de gdal
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* @return Tipo de dato de RasterBuf
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*/
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public int getGdalTypeFromRasterBufType(int rasterBufType) { |
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switch (rasterBufType) {
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case Buffer.TYPE_BYTE: return Gdal.GDT_Byte; |
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case Buffer.TYPE_USHORT: return Gdal.GDT_UInt16; |
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case Buffer.TYPE_SHORT: return Gdal.GDT_Int16; |
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case Buffer.TYPE_INT: return Gdal.GDT_Int32; |
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case Buffer.TYPE_FLOAT: return Gdal.GDT_Float32; |
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case Buffer.TYPE_DOUBLE: return Gdal.GDT_Float64; |
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case Buffer.TYPE_UNDEFINED: return Gdal.GDT_Unknown; |
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} |
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return Gdal.GDT_Unknown;
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} |
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/**
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* Obtiene el anchura del raster
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* @return
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*/
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public int getWidth() { |
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return this.width; |
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} |
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/**
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* Obtiene la altura del raster
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* @return
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*/
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public int getHeight() { |
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return this.height; |
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} |
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/**
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* Obtiene el flag que informa de si el raster tiene valor no data o no.
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* Consultar? todas las bandas del mismo y si alguna tiene valor no data
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* devuelve true sino devolver? false.
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* @return true si tiene valor no data y false si no lo tiene
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* @throws GdalException
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*/
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public boolean existsNoDataValue() throws GdalException { |
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for (int i = 0; i < getRasterCount(); i++) { |
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GdalRasterBand rb = getRasterBand(i + 1);
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if (rb.existsNoDataValue())
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return true; |
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} |
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return false; |
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} |
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/**
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* Obtiene el flag que informa de si el raster tiene valor no data o no
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* en una banda concreta.
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* @return true si tiene valor no data en esa banda y false si no lo tiene
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* @param band Posici?n de la banda a consultar (0..n)
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* @throws GdalException
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*/
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public boolean existsNoDataValue(int band) throws GdalException { |
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GdalRasterBand rb = getRasterBand(band + 1);
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return rb.existsNoDataValue();
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} |
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/**
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* Obtiene el tipo de dato
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* @return entero que representa el tipo de dato
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*/
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public int getDataType() { |
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return dataType;
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} |
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/**
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* Obtiene el n?mero de bandas
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* @return
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*/
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public int getBandCount() { |
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return nBands;
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} |
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/**
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* Lee una bloque completo del raster y devuelve un array tridimensional del tipo correcto. Esta funci?n es util
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* para una lectura rapida de todo el fichero sin necesidad de asignar vista.
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* @param nLine N?mero de l?nea a leer
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* @param band Banda requerida
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* @return Object que es un array unidimendional del tipo de datos del raster
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* @throws GdalException
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*/
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public Object readBlock(int posX, int posY, int blockWidth, int blockHeight) throws GdalException, InterruptedException { |
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bBandNr = super.getRasterCount();
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GdalRasterBand[] gdalBand = new GdalRasterBand[bBandNr]; |
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for (int iBand = 0; iBand < gdalBand.length; iBand++) |
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gdalBand[iBand] = super.getRasterBand(iBand + 1); |
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GdalBuffer[] gdalBuf = new GdalBuffer[bBandNr]; |
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if (dataType == GDT_Byte) {
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byte[][][] buf = new byte[bBandNr][blockHeight][getRasterXSize()]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iBand][iRow][iCol] = gdalBuf[iBand].buffByte[iRow * blockWidth + iCol]; |
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} |
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} |
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return buf;
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} else if (dataType == GDT_CInt16 || dataType == GDT_Int16 || dataType == GDT_UInt16) { |
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short[][][] buf = new short[bBandNr][blockHeight][getRasterXSize()]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iBand][iRow][iCol] = gdalBuf[iBand].buffShort[iRow * blockWidth + iCol]; |
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} |
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} |
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return buf;
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} else if (dataType == GDT_CInt32 || dataType == GDT_Int32 || dataType == GDT_UInt32) { |
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int[][][] buf = new int[bBandNr][blockHeight][getRasterXSize()]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iBand][iRow][iCol] = gdalBuf[iBand].buffInt[iRow * blockWidth + iCol]; |
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} |
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} |
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return buf;
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} else if(dataType == GDT_Float32 || dataType == GDT_CFloat32) { |
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float[][][] buf = new float[bBandNr][blockHeight][getRasterXSize()]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iBand][iRow][iCol] = gdalBuf[iBand].buffFloat[iRow * blockWidth + iCol]; |
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} |
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} |
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return buf;
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} else if(dataType == GDT_Float64 || dataType == GDT_CFloat64) { |
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double[][][] buf = new double[bBandNr][blockHeight][getRasterXSize()]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iBand][iRow][iCol] = gdalBuf[iBand].buffDouble[iRow * blockWidth + iCol]; |
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} |
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} |
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return buf;
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} |
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return null; |
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} |
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/**
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* Lee una bloque completo del raster y devuelve un array tridimensional del tipo correcto. Esta funci?n es util
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* para una lectura rapida de todo el fichero sin necesidad de asignar vista.
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* @param nLine N?mero de l?nea a leer
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* @param band Banda requerida
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* @return Object que es un array unidimendional del tipo de datos del raster
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* @throws GdalException
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*/
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public Object readBlock(int posX, int posY, int blockWidth, int blockHeight, int iBand) throws GdalException, InterruptedException { |
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GdalRasterBand gdalBand = null;
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gdalBand = super.getRasterBand(iBand + 1); |
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GdalBuffer gdalBuf = null;
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if (dataType == GDT_Byte) {
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byte[][] buf = new byte[blockHeight][blockWidth]; |
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gdalBuf = gdalBand.readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iRow][iCol] = gdalBuf.buffByte[iRow * blockWidth + iCol]; |
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} |
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return buf;
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} else if (dataType == GDT_CInt16 || dataType == GDT_Int16 || dataType == GDT_UInt16) { |
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short[][] buf = new short[blockHeight][blockWidth]; |
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gdalBuf = gdalBand.readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iRow][iCol] = gdalBuf.buffShort[iRow * blockWidth + iCol]; |
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} |
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return buf;
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} else if (dataType == GDT_CInt32 || dataType == GDT_Int32 || dataType == GDT_UInt32) { |
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int[][] buf = new int[blockHeight][blockWidth]; |
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gdalBuf = gdalBand.readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iRow][iCol] = gdalBuf.buffInt[iRow * blockWidth + iCol]; |
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} |
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return buf;
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} else if(dataType == GDT_Float32 || dataType == GDT_CFloat32) { |
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float[][] buf = new float[blockHeight][blockWidth]; |
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gdalBuf = gdalBand.readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iRow][iCol] = gdalBuf.buffFloat[iRow * blockWidth + iCol]; |
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} |
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return buf;
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} else if(dataType == GDT_Float64 || dataType == GDT_CFloat64) { |
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double[][] buf = new double[blockHeight][blockWidth]; |
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gdalBuf = gdalBand.readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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for (int iRow = 0; iRow < blockHeight; iRow++) { |
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for (int iCol = 0; iCol < blockWidth; iCol++) |
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buf[iRow][iCol] = gdalBuf.buffDouble[iRow * blockWidth + iCol]; |
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} |
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return buf;
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} |
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return null; |
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} |
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/**
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* Lee una bloque completo del raster y devuelve un array tridimensional del tipo correcto. Esta funci?n es util
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* para una lectura rapida de todo el fichero sin necesidad de asignar vista.
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* @param nLine N?mero de l?nea a leer
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* @param band Banda requerida
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* @return Object que es un array unidimendional del tipo de datos del raster
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* @throws GdalException
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*/
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public Object readData(int posX, int posY, int blockWidth, int blockHeight) throws GdalException, InterruptedException { |
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bBandNr = super.getRasterCount();
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GdalRasterBand[] gdalBand = new GdalRasterBand[bBandNr]; |
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for (int iBand = 0; iBand < gdalBand.length; iBand++) |
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gdalBand[iBand] = super.getRasterBand(iBand + 1); |
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GdalBuffer[] gdalBuf = new GdalBuffer[bBandNr]; |
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if (dataType == GDT_Byte) {
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byte[][] buf = new byte[bBandNr][]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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buf[iBand] = gdalBuf[iBand].buffByte; |
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} |
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return buf;
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} else if (dataType == GDT_CInt16 || dataType == GDT_Int16 || dataType == GDT_UInt16) { |
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short[][] buf = new short[bBandNr][]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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buf[iBand] = gdalBuf[iBand].buffShort; |
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} |
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return buf;
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} else if (dataType == GDT_CInt32 || dataType == GDT_Int32 || dataType == GDT_UInt32) { |
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int[][] buf = new int[bBandNr][]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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buf[iBand] = gdalBuf[iBand].buffInt; |
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} |
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return buf;
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} else if(dataType == GDT_Float32 || dataType == GDT_CFloat32) { |
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float[][] buf = new float[bBandNr][]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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buf[iBand] = gdalBuf[iBand].buffFloat; |
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} |
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return buf;
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} else if(dataType == GDT_Float64 || dataType == GDT_CFloat64) { |
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double[][] buf = new double[bBandNr][]; |
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for (int iBand = 0; iBand < gdalBuf.length; iBand++) { |
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gdalBuf[iBand] = gdalBand[iBand].readRaster(posX, posY, blockWidth, blockHeight, blockWidth, blockHeight, dataType); |
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buf[iBand] = gdalBuf[iBand].buffDouble; |
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} |
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return buf;
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} |
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return null; |
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} |
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} |
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