Comparisons of [Fe/H] from surveys with that from our new metallicity estimates. For each plane, all stars with [Fe/H] < −1.5 in either axis of the panel are shown as individual data points. In all panels, gray points show all the stars available for the comparison, while the orange stars are for the MP+ sample, which combines the filters from Recio-Blanco et al. (2023) and our additional quality cuts in photometry, astrometry, and our photometric stellar parameters (see text for details). The solid and dashed lines show the one-to-one relation and the ±0.5 dex offset, respectively. Median uncertainties are presented in the top-left corner of each panel.