Two-dimensional density histograms showing the distribution of inclination-corrected column densities and second moment values for the MHONGOOSE galaxies. Each histogram consists of 75 × 75 hexagonal bins, and only bins containing more than 4 pixels are shown. The color bar on the right in each panel indicates the number of pixels per bin. The background contours indicate the total distribution of the entire sample as shown in Fig. 13. Galaxies are divided in three bins in rotation velocity. Within each bin, galaxies are ordered by increasing inclination, with the most face-on galaxies in the top-left, and the most edge-on in the bottom-right. The two light-gray bars between the panels in each bin indicate inclinations of 50° (b/a = 0.67) and 70° (b/a = 0.33), respectively.