Application: gvSIG desktop » gvSIG raster

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import org.gvsig.raster.gdal.util.DefaultCRSUtils;

		//Register CRSUtils

		RasterLocator.getManager().getProviderServices().registerCRSUtilImplementation(

						new DefaultCRSUtils());

					if(RasterLocator.getManager().isCRSUtilSupported())

						proj = RasterLocator.getManager().getCRSUtils().convertWktToIProjection(wktProjection);

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.raster.gdal.util;

import org.cresques.cts.ICRSFactory;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.crs.CRSFactory;

import org.gvsig.fmap.dal.coverage.util.CRSUtils;

import org.gvsig.jogr.CrsGdalException;

import org.gvsig.jogr.OGRException;

import org.gvsig.jogr.OGRSpatialReference;

import org.slf4j.LoggerFactory;

/**

 * Esta clase se encarga de hacer la conversion entre Wkt e IProjection.

 *

 * El uso se hace mediante dos llamadas estaticas que son: convertIProjectionToWkt y

 * convertWktToIProjection.

 *

 * Antes de usarlos, hay que saber si tenemos acceso a gvSIG e intentar coger el factory desde all?.

 * Ya que su uso consume tiempo y espacio de memoria y es preferible reaprovechar ese objeto ya

 * creado. Esto se hace con setCRSFactory.

 *

 * En caso de no asignarse el ya existente, el crear? uno interno y lo dejara en una variable estatica.

 *

 * @version 11/07/2008

 * @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)

 */

public class DefaultCRSUtils implements CRSUtils {

	public ICRSFactory factory = null;

	/*

	 * (non-Javadoc)

	 * @see org.gvsig.fmap.dal.coverage.util.CRSUtils#setCRSFactory(org.cresques.cts.ICRSFactory)

	 */

	public void setCRSFactory(ICRSFactory factory) {

		this.factory = factory;

	}

	/**

	 * Devuelve el CRSFactory asignado desde fuera o creado desde dentro, todo depende de como se haya

	 * usado.

	 *

	 * @param code

	 * @return

	 */

	private IProjection getCRS(String code) {

		if (factory == null)

			factory = CRSFactory.cp;//new ProjectionPool();

		return factory.get(code);

	}

	/*

	 * (non-Javadoc)

	 * @see org.gvsig.fmap.dal.coverage.util.CRSUtils#convertWktToIProjection(java.lang.String)

	 */

	public IProjection convertWktToIProjection(String wkt) {

		if (wkt == null || wkt.equals(""))

			return null;

		String code = null;

		String name = null;

		OGRSpatialReference oSRSSource = new OGRSpatialReference();

		try {

			OGRSpatialReference.importFromWkt(oSRSSource, wkt);

			code = oSRSSource.getAuthorityCode("PROJCS");

			if (code == null)

				code = oSRSSource.getAuthorityCode("GEOGCS");

			name = oSRSSource.getAuthorityName("PROJCS");

			if (name == null)

				name = oSRSSource.getAuthorityName("GEOGCS");

			try {

				return getCRS(name + ":" + code);

			} catch (NumberFormatException ex) {

				return null;

			}

		} catch (OGRException e) {

			LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo EPSG", e);

		} catch (CrsGdalException e) {

			LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo EPSG", e);

		}

		return null;

	}

	/*

	 * (non-Javadoc)

	 * @see org.gvsig.fmap.dal.coverage.util.CRSUtils#convertIProjectionToWkt(org.cresques.cts.IProjection)

	 */

	public String convertIProjectionToWkt(IProjection projection) {

		if(projection == null)

			return null;

		OGRSpatialReference oSRSSource = new OGRSpatialReference();

		String code = projection.getAbrev();

		String name = code.substring(0, code.indexOf(":"));

		code = code.substring(code.indexOf(":") + 1);

		try {

			do

				if (name.equals("EPSG")) {

					OGRSpatialReference.importFromEPSG(oSRSSource, Integer.parseInt(code));

					break;

				}

			while (false);

			return OGRSpatialReference.exportToWkt(oSRSSource);

		} catch (CrsGdalException e) {

			LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

		} catch (NumberFormatException e) {

			LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

		} catch (OGRException e) {

			LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

		}

		return null;

	}

}