Collapsed view of the west region of the mosaic, where the polarized intensity and Faraday depth of the brightest feature in the Faraday depth spectrum were used to determine the brightness and color respectively. The features in the north west and north center, marked by the gray box and described in Sect. 3.2.1, can be clearly seen as sheets of polarized emission with Faraday rotation gradients, while the feature in the southwest shows much more patchy structure in polarized intensity. The instrumental leakage causes bright Stokes I sources to appear as small blue circular features. The three crosses mark the locations of the spectra shown in Fig. 12.