public interface SpatialOperator { 
	  public static int UNKNOWN = -1;
	  public static int EQUALS = 1;
	  public static int DISJOINT = 2;
	  public static int INTERSECTS = 3;
	  public static int TOUCHES = 4;
	  public static int CROSSES = 5;
	  public static int WITHIN = 6;
	  public static int CONTAINS = 7;
	  public static int OVERLAPS = 8;
	}