svn-gvsig-desktop / branches / libProjection_v2_0_prep / libraries / libProjection / src / org / cresques / impl / cts / gt2 / CSMercator.java @ 27135
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/*
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* Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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*
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* Copyright (C) 2004-6.
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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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* For more information, contact:
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*
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* cresques@gmail.com
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*/
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package org.cresques.impl.cts.gt2; |
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import org.geotools.cs.AxisInfo; |
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import org.geotools.cs.GeographicCoordinateSystem; |
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import org.geotools.cs.Projection; |
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import org.geotools.units.Unit; |
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import org.opengis.referencing.FactoryException; |
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/**
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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*/
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public class CSMercator extends CoordSys { |
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public CSMercator(CSDatum datum) {
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super(datum);
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geogCS = new GeographicCoordinateSystem(datum.getName(null), |
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datum.getDatum()); |
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Unit linearUnit = Unit.METRE; |
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javax.media.jai.ParameterList params = csFactory.createProjectionParameterList("Mercator");
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params.setParameter("semi_major",
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datum.getDatum().getEllipsoid().getSemiMajorAxis()); |
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params.setParameter("semi_minor",
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datum.getDatum().getEllipsoid().getSemiMinorAxis()); |
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params.setParameter("central_meridian", 0D); |
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params.setParameter("latitude_of_origin", 0D); |
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params.setParameter("scale_factor", 1D); |
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params.setParameter("false_easting", 0D); |
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params.setParameter("false_northing", 0D); |
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try {
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Projection projection = csFactory.createProjection("Mercator",
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"Mercator_1SP",
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params); |
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projCS = csFactory.createProjectedCoordinateSystem(projection.getName() |
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.toString(), |
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geogCS, |
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projection, |
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linearUnit, |
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AxisInfo.X, |
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AxisInfo.Y); |
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} catch (FactoryException e) {
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// TODO Bloque catch generado autom?ticamente
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e.printStackTrace(); |
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} |
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} |
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public double getScale(double minX, double maxX, double w, double dpi) { |
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double scale = super.getScale(minX, maxX, w, dpi); |
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if (projCS != null) { // Es geogr?fico; calcula la escala. |
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scale = ((maxX - minX) * // metros
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(dpi / 2.54 * 100.0)) / // px / metro |
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w; // pixels
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} |
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return scale;
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} |
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public String toString() { |
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return projCS.toString();
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} |
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} |