Locations of the observed 1° × 1° (corresponding to 325 kpc x 325 kpc at the distance of the Fornax cluster) sized FDS fields are plotted in black. The r′-band weight maps (see Sect. 3.1) are shown in the gray-scale colors, darker color corresponding to deeper observations. All the FCC galaxies (Ferguson 1989) classified as “likely members” or “definitive members” are shown with red points. We note that compared to FDS, FCC covers a slightly larger area of the cluster. The green dotted circle shows the virial radius of 2.2° (≈0.7 Mpc, Drinkwater et al. 2001), and the green cross shows the central galaxy NGC 1399. The blue cross and the blue dotted line show the peculiar elliptical galaxy NGC 1316 in the center of the Fornax A subgroup, and the 2σ galaxy overdensity around it, respectively.