Same as Fig. 2, but using HI data from VLA (70 pc resolution), DRAO (490 pc resolution), and CO data from IRAM 30 m antenna (50 pc resolution) to show results of the anisotropic velocity dispersion model (Sect. 4). The columns illustrate various cases of velocity anisotropy parameter found by the best-fit model: β_ϕ ∼ 0 (for isotropy, left ), 0 <  β_ϕ (for radial bias, middle), β_ϕ <  0 (for supposedly tangential bias, right). For each resolution, the selected radii are among the best positions illustrating each case of anisotropy parameter, following Fig. 6. Solid lines represent the best-fit dispersion model at the considered radii, assuming σ_z = ⟨σ_los⟩_ϕ.