Distribution of [C ii] and [O i] emission (upper left and right panels respectively) in 30 Doradus; the ratio of ([C ii]+[O i])/[O iii] (middle left panel), the distribution of c_PDR (middle right panel) with the colorbar indicating the percentage of PDR along the line of sight and the ratio [C ii]/([C ii]+[O i]) (lower panel). The contours of [O iii] are overlaid on all the panels for comparison, with the color intensity ranging from dark gray for lower emission to light gray for higher [O iii] emission.