def lev(self):
        """Pressure levels at grid centers (hPa or mb)

        :getter:    Returns the points of axis ``'lev'`` if availible in the
                    process's domains.
        :type:      array
        :raises: :exc:`ValueError`
                    if no ``'lev'`` axis can be found.

        """
        try:
            for domname, dom in self.domains.items():
                try:
                    thislev = dom.axes['lev'].points
                except:
                    pass
            return thislev
        except:
            raise ValueError('Can\'t resolve a lev axis.')
Pressure levels at grid centers (hPa or mb)

        :getter:    Returns the points of axis ``'lev'`` if availible in the
                    process's domains.
        :type:      array
        :raises: :exc:`ValueError`
                    if no ``'lev'`` axis can be found.