Properties of the segments obtained on the cube of S/N for the C¹⁷O (1–0) line. This cube was segmented into contiguous position-position-velocity regions above a minimum S/N value. The segments are ordered by decreasing value of the S/N summed over the segment (total S/N). The shown properties are, from top to bottom, the total number of pixels inside the segment, the total S/N, and the mean S/N of the segment. These properties are shown for two different S/N thresholds: 1 and 2. The blue plain vertical lines show the segments that are selected to compute the moment maps in Fig. 15. The red dashed horizontal lines show the typical mean S/N reached for the segment # 200.