CoordinateAdapter converts between the XML String for a coordinate and a Point3d. Because the ots-xsd project is not
 dependent on ots-core, Point3d is chosen instead of OTSPoint3D to store the (x, y, z) information. The marshal function
 returns a 2D-coordinate in case the z-value is zero. 
 
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 for project information 
www.simulation.tudelft.nl. The
 source code and binary code of this software is proprietary information of Delft University of Technology.