Photometric offset for each J-PLUS DR2 pointing estimated from the metallicity-dependent stellar locus. Top left panel: initial offset in Galactic coordinates with the homogenization from ISL, Δu_FeH. Top right panel: modeled metallicity offset F_u in Galactic coordinates. Those pointings without offset estimation and not used in the modeling procedure are highlighted with a black edge. Bottom left panel: final metallicity offset in Galactic coordinates after the homogenization from ISL + ZSL, . Bottom right panel: distribution of the metallicity offsets Δu_FeH (gray) and (colored). The Gaussian distributions that better describe the data are also shown, with their dispersion labeled in the panel. The dotted line marks zero offset.