package de.intevation.gnv.math;

import com.vividsolutions.jts.geom.Coordinate;

/**
 * Interface to encapsulate the query of the depth at a given point.
 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
 */
public interface XYDepth
{
    /**
     * Returns the depth at a given coordinate. Negative
     * values are below the water surface.
     * @param coordinate The coordinate where to take the depth.
     * @return The depth at the queried coordinate. NaN is no
     * depth is available at the given point.
     */
    double depth(Coordinate coordinate);
}
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