virtual ~KKJ();
/**
+ * Equals operator.
+ * Tests the equality of this coordinate and another coordinate and returns \c true
+ * if the coordinates represent the same position.
+ * @param rhs the other coordinate to test against.
+ * @return \c true if the coordinates are the same, \c false otherwise.
+ */
+ bool operator==(const KKJ &rhs) const;
+
+ /**
* Returns the northing of the coordinate.
* @return the northing.
*/