Map showing the number of fitted velocity components for each C¹⁸O(2–1) spectra. The blue and red contours indicate velocity components = 2 and = 3, respectively. More than 88% of the spectra are fitted with a single velocity component and only ~12% of the spectra required two or three velocity components to fit the observed spectra. The cyan curves trace the crests of the identified velocity coherent filaments (same as in Fig. 6). The black arrow toward the MFS indicates the location of the spectrum shown in Fig. B.1. The red lines indicate the central positions of the slices used to derive the PV diagrams shown in Fig. C.1.