Distributions of individual uncertainties on [Fe/H]_phot, v (upper panels) and on [Fe/H]_phot, b (lower panels) as a function of [Fe/H]_phot, v (left panels) and of G magnitude (right panels). In all cases the colour scale is coded according to the logarithm of local density. In all panels the continuous red curve traces the median of the ϵ[Fe/H]_phot, v distribution, while the red dashed curves trace the 16th and 84th percentiles of the same distribution. The scales of the y-axis between the upper and lower panels are different.