Zoom-in on the anticentre region and definition of the patches. Top: result of applying a Gaussian smoothing plus Sobel filter to Fig. 1 in the region: 110° <  l <  220°, −50° <  b <  50°. We use this map to isolate the ACS and MNC. Bottom: wavelet/N_HP (relative peak intensity) of the same region. The black contours delineate the regions that we isolated according to the upper panel, while the dotted horizontal lines (b = [28°, 33°, 41°]) give an approximate limit for the structures in latitude at l ∼ 170°.