Improvement over statistical distances of combined distances for ‘true’ PNe with high-reliability matches. Left panel: distribution of statistical and combined distances and relative uncertainties, with lines connecting pairs of points corresponding to the same object. Right panel: cumulative distribution of relative uncertainties for parallaxes, statistical distances, and combined distances. The dotted lines for parallaxes and statistical distances are counts including objects with only parallaxes (not in FPB16) and all ‘true’ PNe from FPB16 (not necessarily having parallaxes or Gaia matches) respectively.