Excitation diagrams of H₂ lines observed towards the H II region, atomic PDR, DF 1, DF 2, and DF 3. With the exception of H II region, the H₂ lines in the excitation diagrams are first corrected for foreground visual extinction and subsequently for extinction within the PDR using the intermingled formalism. In H II region the lines are only corrected for the foreground visual extinction. The excitation diagrams for the 0–0 S, 1–0 Q, 1–0 S, 1–0 0, and 1–1 S levels of H₂ are fitted using a single temperature component of the gas, and the individual fits are represented by solid lines. The resulting temperature and column densities obtained from the fits are listed in Table 4.