Top left: dust column density map from LABOCA with red contour levels of 0.3, 1, 1.7, 2.3, and 3 × 10²² cm^-2 . Integrated C¹⁸O(2–1)intensity maps of cut A, B, and C (top rightand bottom figures, respectively). The six boxes into which each cut was divided are shown as well as the contours of the LABOCA 870 μm continuum emission. Levels are from 10–100% of the peak intensity of 1.37 Jy/beam.