| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 Instituto de Desarrollo Regional and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Iba?ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)

 *   Campus Universitario s/n

 *   02071 Alabacete

 *   Spain

 *

 *   +34 967 599 200

 */

package org.gvsig.georeferencing.process;

import java.awt.geom.Point2D;

import junit.framework.TestCase;

import org.gvsig.georeferencing.process.geotransform.GeoTransformDataResult;

import org.gvsig.georeferencing.process.geotransform.GeoTransformProcess;

import org.gvsig.raster.datastruct.GeoPoint;

import Jama.Matrix;

/**Test que prueba la el proceso de geotransfornmcion dados una serie de puntos de

 * control.  Compara los coeficientes obtenidos para el polinomio de transformacion  

 * (de coordenadas mapa a coordenadas pixel para las Y), con los obtenidos 

 * manualmente, resolviendo por el m?todo de Cramer.

 * 

 * 

 * @author aMu?oz (alejandro.munoz@uclm.es)

 * */

public class TGeoTransformProcessMapToPixelXTest extends TestCase {

	private GeoPoint gpcs[] = new GeoPoint[3];

	private double geoPoints[][] ={{ 1369.000000  	,	2985.750000	},

								   { 1673.500000  	,   2803.250000	},

								   { 2092.500000 	,   2933.250000	},

							       }; 

	private double imagePoints[][]={{ 577.500000     ,	2427.500000 },

									{ 803.000000     ,  2235.500000 },

									{ 1165.500000    ,  2285.250000	},

									};

	public void start() {

		this.testStack();

	}

	public void testStack() {

		System.err.println("TGeoTransformProcessMapToPixelYTest running...");

		for(int i=0;i<geoPoints.length;i++)

		{

			Point2D  pW = new Point2D.Double(geoPoints[i][0],geoPoints[i][1]);

			Point2D  pP = new Point2D.Double(imagePoints[i][0],imagePoints[i][1]);

			gpcs[i]= new GeoPoint(pP,pW);

		}

		GeoTransformProcess proceso = new GeoTransformProcess();

		proceso.addParam("gpcs",gpcs);

		proceso.addParam("orden", new Integer(1));

		proceso.run();

		GeoTransformDataResult resultado= (GeoTransformDataResult) proceso.getResult();

		// Estimacion de los coeficientes de forma manual, siquiento la teoria del manual de Jose Gonzalez

		// Matriz para el ejmplo correspondiente a la figura 2.20

		double M[][]={

				{3,			2546,			6948.25},

				{2546,		2336705.5,		5860446.625},

				{6948.25,	5860446.625,	16112584.0625}

					};

		Matrix m_M = new Matrix(M);

		double det= m_M.det();

		double A0[][]={

				{5135,				2546,			6948.25},

				{4573226.75,		2336705.5,		5860446.625},

				{11846242.375,	    5860446.625,	16112584.0625}

		};

		Matrix m_A0= new Matrix (A0);

		double coef0= m_A0.det()/det;

		double A1[][]={

				{3,			5135,			6948.25},

				{2546,		4573226.75,		5860446.625},

				{6948.25,	11846242.375,	16112584.0625}

		};

		Matrix m_A1= new Matrix (A1);

		double coef1= m_A1.det()/det;

		double A2[][]={

				{3,			2546,			5135},

				{2546,		2336705.5,		4573226.75},

				{6948.25,	5860446.625,	    11846242.375}

				};

		Matrix m_A2= new Matrix (A2);

		double coef2= m_A2.det()/det;

		// Comprobacion de los coeficientes obtenidos tras el proceso con los determinados de forma manual

		assertEquals(coef0, resultado.getPixelToMapCoefX()[0],0.1);

		assertEquals(coef1, resultado.getPixelToMapCoefX()[1],0.1);

		assertEquals(coef2, resultado.getPixelToMapCoefX()[2],0.1);

	}

}