def METHOD_NAME(self):
    from yt.utilities.on_demand_imports import _cartopy as cartopy
    axis = "altitude"
    self.slc = yt.SlicePlot(self.ds, axis, ("stream", "Density"), origin="native")
    assert isinstance(self.slc._projection, cartopy.crs.Mollweide)
    assert isinstance(self.slc._transform, cartopy.crs.PlateCarree)
    assert self.ds.coordinates.data_projection[axis] == "Mollweide"
    assert self.ds.coordinates.data_transform[axis] == "PlateCarree"
    assert isinstance(
        self.slc._projection,
        type(self.slc.plots[("stream", "Density")].axes.projection),
    )