Top: corner-plots showing the correlation between the various parameters (shaded regions, with contours at arbitrary iso-density levels) along with their marginalised probability distribution (histograms on top) for the EPG of NGC 3198. Top-right inset: total H I map of NGC 3198 showing the cuts parallel to the major and minor axes used in pv-slices below. Bottom: pv-slices for the data (black contours) and for our best-fit model (red contours). Slice off-sets are indicated on the top-left of each panel. The white area and the green dashed contour indicate the internal and external mask, respectively. Orange squares show the rotation velocities determined with ^3DBAROLO. Contours are spaced by powers of 2, the outermost being at an intensity level of 0.28 mJy beam⁻¹ (2σ_noise). A negative contour (−2σ_noise) is shown for the data as a dashed grey line.