org.kalypsodeegree.model.elevation.ElevationUtilities.java Source code

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Here is the source code for org.kalypsodeegree.model.elevation.ElevationUtilities.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package org.kalypsodeegree.model.elevation;

import org.apache.commons.lang3.Range;
import org.kalypso.grid.GeoGridUtilities;
import org.kalypso.transformation.transformer.GeoTransformerFactory;
import org.kalypso.transformation.transformer.IGeoTransformer;
import org.kalypsodeegree.model.geometry.GM_Envelope;
import org.kalypsodeegree_impl.gml.binding.commons.ICoverage;
import org.kalypsodeegree_impl.gml.binding.commons.RectifiedGridCoverage;

/**
 * Helper class for {@link IElevationModel}s.
 *
 * @author Gernot Belger
 */
public final class ElevationUtilities {
    /**
     * Wraps an coverage into an {@link IElevationModel}. The caller is responsible for disposing the returned
     * {@link IElevationModel}.
     */
    public static IElevationModel toElevationModel(final ICoverage coverage) {
        if (coverage instanceof IElevationModelProvider)
            return ((IElevationModelProvider) coverage).getElevationModel();

        if (coverage instanceof RectifiedGridCoverage)
            return GeoGridUtilities.toGrid(coverage);

        throw new IllegalArgumentException();
    }

    /**
     * This function returns the envelope of the elevation model in the target coordinate system.
     *
     * @param elevationModel
     *          The elevation model.
     * @param targetSrs
     *          The target coordinate system.
     * @return The envelope of the elevation model in the target coordinate system.
     */
    public static GM_Envelope getEnvelope(final IElevationModel elevationModel, final String targetSrs)
            throws Exception {
        final GM_Envelope boundingBox = elevationModel.getBoundingBox();
        if (boundingBox == null)
            return null;

        final IGeoTransformer geoTransformer = GeoTransformerFactory.getGeoTransformer(targetSrs);

        return geoTransformer.transform(boundingBox);
    }

    public static Range<Double> calculateRange(final ICoverage[] coverages) {
        // get min / max
        double min = Double.MAX_VALUE;
        double max = -Double.MAX_VALUE;

        for (final ICoverage coverage : coverages) {
            try {
                final IElevationModel model = toElevationModel(coverage);
                min = Math.min(min, model.getMinElevation());
                max = Math.max(max, model.getMaxElevation());

                // dispose it
                model.dispose();
            } catch (final Exception e) {
                e.printStackTrace();
            }
        }

        return Range.between(min, max);
    }
}