Integrated H I map (top) and the velocity field (below) of the Chamaeleon-Musca complex from fitting a single gaussian to the H I spectra, with overplotted Planck brightness contours at 353 GHz. The blue contours highlight the dense Chamaeleon molecular clouds and the Musca filament, while the black and grey contours indicate the more extended continuum emission from Planck. Around the two maps, the average H I spectrum of the full complex and its peak emission (blue) is compared with the local H I spectrum (red) and velocity of the CO gas (black dashed line) (Mizuno et al. 2001)from the selected dense region (Cha I, Cha II, Cha III, Cha East and Musca). In the lower right figure, the ¹²CO velocity field from the NANTEN2 data is shown.