Metallicity distribution of the DGS sample from 12 + log(O/H) = 7.14 to 8.43. Solar metallicity is indicated here as a guide to the eye. The pre-Herschel star formation rate (SFR) distribution is also indicated by the colour code. They have been converted from L_TIR(Spitzer) with the Kennicutt (1998) law, and are given in Madden et al. (2013). When no IR data was available, Hα or Hβ emission lines were used and converted to SFR (Kennicutt 1998). The dashed cells indicate that none of these data were available for the galaxy. The most actively star-forming galaxy (in red) corresponds to the starburst luminous infrared galaxy (LIRG) Haro 11.