Comparison of the fundamental surface gravity values with mean values of spectroscopic and parallax-based determinations compiled from the literature. The stars are ordered by increasing fundamental temperature from left to right. The two upper panels display the difference in the literature log g from the fundamental log g. Black error bars centred on zero represent the uncertainty in fundamental log g for each star, while grey error bars represent the standard deviation of the mean for N ≥ 3, as well as combined linear uncertainties and individual uncertainties in the case of two and one determinations, respectively. The number of determinations for each star are indicated in the two panels. The bottom panel compares the parallax-based and spectroscopic gravity measurements with error bars representing combined standard deviations. Symbol colour indicates metallicity from Table 1. See text and Table 11 for data, references, and discussion.