Comparison of the Wilson depression derived from the divergence method and the pressure method for synthetic Hinode data generated from the simulation run 2. Panel A: Wilson depression derived using the pressure method and panel B: Wilson depression derived using the divergence of the magnetic field (the same image as shown in panel B in Fig. 6). The black and white contours indicate the outer and the inner penumbral boundary, respectively. The dashed black contour shows the region that was used for defining z_W = 0 (distance of at least 7 Mm to the sunspot). Bottom panels: Wilson depression along cuts across the sunspot (marked by the dashed lines in the top panels). Panel C: a cut along the x-direction, panel D: a cut along the y-direction. Blue: true Wilson depression (z_W), red: Wilson depression derived using the divergence method (z_{W, d}), black: Wilson depression inferred from the pressure method (z_{W, p}), green: Wilson depression inferred from the pressure method degraded to the spatial resolution of the divergence method (z_{W, p, filt}).