root / trunk / extensions / extGeoreferencing / src / org / gvsig / georeferencing / utils / GeoUtils.java @ 6214
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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) 2006 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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package org.gvsig.georeferencing.utils; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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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.FileOutputStream; |
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import java.io.FileReader; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import com.iver.cit.gvsig.fmap.ViewPort; |
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public class GeoUtils { |
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public static double INCHESMTR = 39.73007874D; |
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public static double INCHESCM = 0.3973007874D; |
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public static double INCHESMM = 0.03973007874D; |
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public static double MTRSINCH = 0.0254D; |
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public static double MMSINCH = 25.4D; |
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public static double CMSINCH = 2.54D; |
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/**
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* Recorta el n?mero de decimales a n del n?mero pasado por par?metro
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* @param num Valor a recortar el n?mero de decimales
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* @param n N?mero de decimales a recortar
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* @return N?mero recortado
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*/
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public static double tailDecimals(double num, int n){ |
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long m = (long)Math.pow(10, n); |
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num *= m; |
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long aux = ((long)num); |
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num = (double)((double)aux / (double)m); |
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return num;
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} |
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/**
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* Recorta el n?mero de decimales a n del n?mero pasado por par?metro
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* @param num Valor a recortar el n?mero de decimales
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* @param n N?mero de decimales a recortar
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* @return N?mero recortado
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*/
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public static String tailDecimals(String num, int n){ |
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int index = num.indexOf("."); |
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if(index != -1){ |
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try{
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num = num.substring(0, index + n);
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}catch(IndexOutOfBoundsException e){ |
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//No hacemos nada pq retornar? num
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} |
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} |
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return num;
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} |
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/**
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* Convierte pixels en milimetros dependiendo del los puntos por pulgada
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* @param pixels N?mero de pixels
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* @param ppp Puntos por pulgada
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* @return N?mero de milimetros
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*/
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public static double convertPixelsToMms(int pixels, int ppp){ |
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return convertPixelsToInches(pixels, ppp) * MMSINCH;
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} |
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/**
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* Convierte pixels en centimetros dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de centimetros
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*/
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public static double convertPixelsToCms(int pixels, int ppp){ |
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return convertPixelsToInches(pixels, ppp) * CMSINCH;
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} |
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/**
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* Convierte pixels en metros dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de metros
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*/
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public static double convertPixelsToMts(int pixels, int ppp){ |
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return convertPixelsToInches(pixels, ppp) * MTRSINCH;
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} |
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/**
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* Convierte pixels en pulgadas dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de pulgadas
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*/
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public static double convertPixelsToInches(int pixels, int ppp){ |
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return (double)((double)pixels / (double)ppp); |
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} |
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/**
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* Convierte metros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de metros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertMtsToPixels(double mts, int ppp){ |
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return (int)(mts * GeoUtils.INCHESMTR * ppp); |
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} |
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/**
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* Convierte pulgadas en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de pulgadas
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertInchesToPixels(double inches, int ppp){ |
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return (int)(inches * ppp); |
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} |
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/**
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* Convierte centimetros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de centmetros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertCmsToPixels(double cms, int ppp){ |
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return (int)(cms * GeoUtils.INCHESCM * ppp); |
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} |
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/**
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* Convierte milimetros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de milimetros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertMmsToPixels(double mms, int ppp){ |
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return (int)(mms * GeoUtils.INCHESMM * ppp); |
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} |
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/**
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* Devuelve la traspuesta de una matriz
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* @param M Matriz
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* @param m N?mero de filas
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* @param n N?mero de columnas
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* @return Matriz traspuesta
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*/
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public static double[][] transpose(double[][] M, int m, int n){ |
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double[][] a = new double[n][m]; |
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int i, j;
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for (i = 0; i < n; i++) |
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for (j = 0; j < m; j++) |
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a[i][j] = M[j][i]; |
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return a;
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} |
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/**
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* Producto de matrices (AxB)
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* @param a Matriz A
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* @param b Matriz B
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* @param M
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* @param N
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* @param O
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* @return
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*/
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public static double[][] multmatrix(double[][] a, double[][] b, int M, int N, int O){ |
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double[][] c = new double[M][O]; |
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double sum;
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int i, j, k;
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for (i = 0; i < M; i++) { |
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for (j = 0; j < O; j++) { |
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sum = 0;
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for (k = 0; k < N; k++) |
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sum += b[k][j] * a[i][k]; |
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c[i][j] = sum; |
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} |
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} |
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return (c);
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} |
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/**
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* Calcula el zoom dependiendo del factor de escala pasado por
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* par?metro.
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*/
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public static ViewPort calcZoom(ViewPort vp, double factor){ |
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ViewPort viewPortBlock = new ViewPort(vp.getProjection());
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viewPortBlock.setExtent(vp.getExtent()); |
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viewPortBlock.setImageSize(vp.getImageSize()); |
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viewPortBlock.setScale(); |
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Rectangle2D.Double r = new Rectangle2D.Double(); |
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double nuevoX = (vp.getExtent().getCenterX()) - ((vp.getExtent().getWidth() * factor) / 2.0); |
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double nuevoY = (vp.getExtent().getCenterY()) - ((vp.getExtent().getHeight() * factor) / 2.0); |
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r.x = nuevoX; |
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r.y = nuevoY; |
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r.width = viewPortBlock.getExtent().getWidth() * factor; |
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r.height = viewPortBlock.getExtent().getHeight() * factor; |
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viewPortBlock.setExtent(r); |
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viewPortBlock.setScale(); |
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return viewPortBlock;
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} |
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/**
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* Desplaza el extent al nuevo centro
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* @param pto
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*/
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public static ViewPort shiftExtent(Point2D oldCenter, Point2D newCenter, ViewPort vp){ |
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double difX = oldCenter.getX() - newCenter.getX();
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double difY = oldCenter.getY() - newCenter.getY();
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ViewPort viewPortBlock = new ViewPort(vp.getProjection());
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double minX = vp.getExtent().getMinX() - difX;
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double minY = vp.getExtent().getMinY() - difY;
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Rectangle2D ex = new Rectangle2D.Double(minX, minY, vp.getExtent().getWidth(), vp.getExtent().getHeight()); |
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viewPortBlock.setExtent(ex); |
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viewPortBlock.setImageSize(vp.getImageSize()); |
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viewPortBlock.setScale(); |
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return viewPortBlock;
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} |
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/**
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* Hace una copia de seguridad sobre el fichero que le pasamos por par?metro.
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* El fichero de copia se llama como el original pero acabado en ~. Si ya existiese
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* un fichero nombrado as? se nombraria como filename.rmf~1, filename.rmf~2, y as?
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* sucesivamente.
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* @param fName Nombre del fichero que se quiere hacer un backup.
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*/
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public static String fileBackup(String fName){ |
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File inFile = new File(fName); |
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if(!inFile.exists())
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return null; |
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File backupFile = new File(fName +"~"); |
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int nBackupFile = 1; |
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while(backupFile.exists()){
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backupFile = new File(fName + "~"+nBackupFile); |
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nBackupFile ++; |
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} |
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try{
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InputStream in = new FileInputStream(inFile); |
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OutputStream out = new FileOutputStream(backupFile); |
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byte[] buf = new byte[1024]; |
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int len;
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while ((len = in.read(buf)) > 0) |
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out.write(buf, 0, len);
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in.close(); |
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out.close(); |
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}catch(FileNotFoundException exc){ |
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System.err.print("RMF Backup: File not found, "+fName); |
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return null; |
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}catch(IOException exc){ |
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System.err.print("RMF Backup: IOException, "+fName); |
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return null; |
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} |
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return backupFile.getAbsolutePath();
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} |
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/**
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* A partir de una extensi?n de fichero devuelve la extensi?n del fichero
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* WorldFile que le corresponde.
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* @param fileExtension Extensi?n del fichero
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* @return Extensi?n del fichero de georreferenciaci?n
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*/
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public static String getWorldFileExtension(String ext){ |
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String extWorldFile = ".wld"; |
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if(ext.equals("tif") || ext.equals("tiff")) |
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extWorldFile = ".tfw";
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if(ext.equals("jpeg") || ext.equals("jpg")) |
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extWorldFile = ".jgw";
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if(ext.equals("gif")) |
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extWorldFile = ".gfw";
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if(ext.equals("png")) |
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extWorldFile = ".pgw";
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return extWorldFile;
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} |
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/**
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* A partir de un nombre de fichero devuelve la extensi?n del fichero
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* WorldFile que le corresponde.
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* @param file Nombre del fichero
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* @return Extensi?n del fichero de georreferenciaci?n
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*/
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public static String getWorldFileExtensionFromFileName(String file){ |
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String ext = file.substring(file.lastIndexOf(".") + 1).toLowerCase(); |
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return GeoUtils.getWorldFileExtension(ext);
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} |
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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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public static 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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} |