Radial profiles of some typical optical emission lines for PA = 160° (top panel) and PA = 320° (bottom panel). The line intensities are normalized and an offset of 0.5 has been applied between the lines. The dashed lines define the pick intensities. There is an overlap in the picks of [N II], [S II] and [C I] for both PA and between [S III] and the first pick of [S II] only for PA = 360°.