Total proton column density distribution toward G338.3−0.0, in the same velocity ranges as in Fig. 2: a) from −121 to −111 km s^-1 and b) from −40 to −25 km s^-1. The scale is in units of 10²¹ cm^-2. This image was obtained by summing up the proton contributions to the total column density from the atomic and molecular species of hydrogen. The resolution is the same as the ¹²CO data. Black contours delineate the radio emission at 610 MHz at the same levels as in Fig. 2. Blue contours indicate the source AGAL338.307+00.006.