es to store their
 points using something other than the JTS <A HREF="../../../../com/vividsolutions/jts/geom/Coordinate.html" title="class in com.vividsolutions.jts.geom"><CODE>Coordinate</CODE></A> class. 
 For example, a storage-efficient implementation
 might store coordinate sequences as an array of x's
 and an array of y's. 
 Or a custom coordinate class might support extra attributes like M-values.
 <p>
 Implementing a custom coordinate storage structure
 requires implementing the <A HREF="../../../.