Run of mean metallicity and metallicity dispersion as a function of radius. While both our data and those of Kalirai et al. (2006b) show the presence of a gradient, our measurements are more metal‐poor on average. Top: Only our minor‐axis fields with a radial binning to obtain the same number of stars per bin. The points encircled and labeled by their identifier are not located on the minor axis. Horizontal error bars indicate the extent of our radial binning. The open star indicates the spectroscopic mean [Fe/H] measurement of Reitzel & Guhathakurta (2002). Bottom: Off‐axis fields, with the mean metallicities computed separately for each field.