@classmethod
def ebv(cls, coords, dustmap='SFD', hires=False):
    """
        E(B - V) in the line-of-sight of `coords`.

        Parameters
        ----------
        coords : ``SkyCoord``
            Astropy SkyCoord object with the line-of-sight coordinates.
        nhmap : ``str``, optional
            Name of the dust survey. Use ``show_maps`` method
            to see a list of all available maps. Defaults to 'SFD'.
        hires : ``boolean``, optional
            Use high resolution map. If the map is not available locally,
            it is downloaded. Defaults to `False`.

        Returns
        -------
        ebv : ``float`` or ``numpy.ndarray``
            Float, or numpy array with shape like `coords`.
        """
    ebv_hpmap, nside, order = cls._load_map(dustmap, hires=hires)
    ebv = cls._interpolate(coords, ebv_hpmap, nside, order)
    return ebv
