def METHOD_NAME(plot):
    """
    Generate a 2-D map of cell temperatures and material densities. Used for
    in-memory image generation.
    Parameters
    ----------
    plot : openmc.lib.plot._PlotBase
        Object describing the slice of the model to be generated
    Returns
    -------
    property_map : numpy.ndarray
        A NumPy array with shape (vertical pixels, horizontal pixels, 2) of
        OpenMC property ids with dtype float
    """
    prop_data = np.zeros((plot.v_res, plot.h_res, 2))
    _dll.openmc_property_map(plot, prop_data.ctypes.data_as(POINTER(c_double)))
    return prop_data