return "UTMPoint[northing=" + northing + ", easting=" + easting + ", zone_number="+zone_number+", zone_letter="+zone_letter+"]";
return "UTMPoint[zone_number="+zone_number + ", easting=" + easting + "northing=" + northing + "]";
    public String toString () {        return "UTMPoint[northing=" + northing + ", easting=" +             easting + ", zone_number="+zone_number+", zone_letter="+zone_letter+"]";    }