Abstract
Most planetary nebulae appear to arise from progenitors with mass MPG ≈ 1 M⊙. One would therefore expect them to be closely associated with stars located within the galactic thin disk. This has been confirmed through a series of recent estimates of scale height, which imply values z0(PNe) of order ∼ 220 pc. We shall show, in the following, that it is also possible to evaluate the variation of z0(PNe) with galactocentric distance R. Although such an analysis is subject to several uncertainties, including those associated with the distances to these outflows, it is nevertheless possible to demonstrate that z0(PNe) increases with increasing R. This spatial ``flaring'' is consistent with what is known of various other disk components.
