Velocity components (the Galactic coordinate axes are displayed in the figure). The LSR velocity (in km s⁻¹) of the different components is given in yellow (and sorted by decreasing peak intensity). The typical velocity uncertainty is 2 km s⁻¹. For the brightest parts of the H II regions, only the main and intensity-dominating component is given in red (in blue if this component is very broad with FWHM ≥ 40 km s⁻¹).