[D/H] as a function of Galactocentric radius based on our HD and H₂ rotational line measurements within JOYS (squares), other rotational line values from ISO (circles) (Wright et al. 1999; Bertoldi et al. 1999), and local Galactic disk values from UV absorption lines (triangles) (Prodanović et al. 2010; Hébrard 2010). Our measurements and those for the Orion OMC outflow include an upward correction factor of 2.54 to [D/H] for chemical conversion of HD to D. We also show Galactic chemical evolution models of our Galaxy from (black dashed line, reproduced from solid line in Fig. 5 of Romano et al. 2006) and from a Milky Way type Galaxy in a cosmological zoom-in simulation from (gray line, reproduced from model “m12i” in Fig. 5 of van de Voort et al. 2018).