The magnitude distributions of the SDSS observations and the TRILEGAL simulations generated with parameter set 5 in the g (top) and r (bottom) band. The x- and y-axes are similar to the bottom panel of Fig. 1. The error bars (blue) are from the SDSS DR7 data with a colour limit of 0.2 ≤ (g − r) < 1.2. The black solid line represents the model star counts from TRILEGAL set 5. The dotted (red), dashed (cyan), and dot-dashed (green) line stand for the thin disc, thick disc, and halo of TRILEGAL set 5, respectively. (A colour version is available on-line.)