Overview of the RRL emission of the H II region G28.59−0.364. The left panel shows integrated, stacked RRL emission at 25″ resolution. The GLOSTAR broadband 5.8 GHz continuum (gray contours) from −0.005 Jy beam⁻¹ in steps of 0.01 Jy beam⁻¹. ATLASGAL 870 μm emission (Schuller et al. 2009) is shown (black contours) starting from 0.2 Jy beam⁻¹ in steps of 0.2 Jy beam⁻¹. The right panel shows ¹³CO (3–2) emission (in red) from the CHIMPS survey (Rigby et al. 2016). All data have been smoothed to the angular resolution of the RRL data of 25″. The positions of extracted spectra in the side panels are indicated with blue crosses.