Revision 8281 trunk/libraries/libCq CMS for java.old/src/org/cresques/io/GeoRasterFile.java
| GeoRasterFile.java | ||
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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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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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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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| ... | ... | |
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tag = parser.next(); |
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} |
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double[] values = {originX, originY, w, h, pixelSizeX, pixelSizeY};
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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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return; |
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boolean georefOk = false; |
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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 imageWidth = 0D, imageHeight = 0D; |
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FileReader fr = null; |
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String v = null; |
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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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if(georefOk){
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rmfExists = true; |
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setExtentTransform(originX, originY, w, h, pixelSizeX, pixelSizeY); |
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extent = new Extent(originX, originY, originX + (pixelSizeX * imageWidth), originY + (pixelSizeY * imageHeight)); |
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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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} |
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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 |
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* @param originY Coordenada Y de origen del raster |
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* @param pixelSizeX Tama?o de pixel en X |
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* @param pixelSizeY Tama?o de pixel en Y |
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* @param imageWidth Ancho del raster en pixels |
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* @param imageHeight Alto del raster en pixels |
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* @param shearX Shearing en X |
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* @param shearY Shearing en Y |
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*/ |
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private void createExtentsFromRMF( double originX, double originY, double pixelSizeX, double pixelSizeY, |
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double imageWidth, double imageHeight, double shearX, double shearY){
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Point2D p1 = new Point2D.Double(originX, originY); |
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Point2D p2 = new Point2D.Double(originX + shearX * imageHeight, originY + pixelSizeY * imageHeight); |
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Point2D p3 = new Point2D.Double(originX + pixelSizeX * imageWidth, originY + shearY * imageWidth); |
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Point2D p4 = new Point2D.Double(originX + pixelSizeX * imageWidth + shearX * imageHeight, originY + pixelSizeY * imageHeight + shearY * imageWidth); |
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double minX = Math.min(Math.min(p1.getX(), p2.getX()), Math.min(p3.getX(), p4.getX())); |
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double minY = Math.min(Math.min(p1.getY(), p2.getY()), Math.min(p3.getY(), p4.getY())); |
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double maxX = Math.max(Math.max(p1.getX(), p2.getX()), Math.max(p3.getX(), p4.getX())); |
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double maxY = Math.max(Math.max(p1.getY(), p2.getY()), Math.max(p3.getY(), p4.getY())); |
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extent = new Extent(minX, minY, maxX, maxY); |
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requestExtent = new Extent(originX, originY, originX + (pixelSizeX * imageWidth), originY + (pixelSizeY * imageHeight)); |
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} |
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/** |
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* Calcula la transformaci?n que se produce sobre la vista cuando la imagen tiene un fichero .rmf |
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* asociado. Esta transformaci?n tiene diferencias entre los distintos formatos por lo que debe calcularla |
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* el driver correspondiente. |
| ... | ... | |
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public boolean isGeoreferenced(){
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return true; |
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} |
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/** |
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* M?todo que indica si existe un fichero .rmf asociado al GeoRasterFile. |
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* @return |
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*/ |
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public boolean rmfExists(){
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return this.rmfExists; |
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} |
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/** |
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* Obtiene los par?metros de la transformaci?n af?n que corresponde con los elementos de |
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* un fichero tfw. |
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* <UL> |
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* <LI>[1]tama?o de pixel en X</LI> |
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* <LI>[2]rotaci?n en X</LI> |
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* <LI>[4]rotaci?n en Y</LI> |
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* <LI>[5]tama?o de pixel en Y</LI> |
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* <LI>[0]origen en X</LI> |
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* <LI>[3]origen en Y</LI> |
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* </UL> |
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* Este m?todo debe ser reimplementado por el driver si tiene esta informaci?n. En principio |
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* Gdal es capaz de proporcionarla de esta forma. |
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* @return vector de double con los elementos de la transformaci?n af?n. |
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*/ |
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public double[] getTransform(){return null;}
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} |
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