'Any keyword arguments passed to ``set_xscale`` and
``set_yscale`` will be passed along to the scale\'s
constructor.
thresh: The degree above which to crop the data.'

def __init__(self, axis, **kwargs):

    mscale.ScaleBase.__init__(self)
    thresh = kwargs.pop(u'thresh', np.radians(85))
    if (thresh >= (np.pi / 2.0)):
        raise ValueError(u'thresh    must    be    less    than    pi/2')
    self.thresh = thresh
