Column density map of the G338.93–00.06 field. The red contours are for the column density levels of 0.5, 1.0, 1.5, and 2 × 10²³ cm⁻², mainly showing the locations of the bright clumps. The blue contour corresponds to a column density level of 3.5 × 10²² cm⁻². It mainly shows the collected material around the north-east lobe. The green contours are the aperture used to measure the mass and density for the central regions of the clumps.