Velocity comparison between large-scale APEX [CI] and small-scale NOEMA emission data. Top two panels: reproduction of the [CI] firstmoment map and pv cut from Beuther et al. (2020). Top-left: color scale and contours showing the [CI] first-moment map and ATLASGAL 870 μm emission (contour levels starting at 4σ and continuing in 8σ steps, 1σ=50 mJy beam⁻¹). A scale bar is shown as well. Top-right: position-velocity diagram along the white line in the top-left panel from high to low latitudes (high latitude offset 0). The full white lines mark the center position of the single-dish filament, and the dotted lines indicate the approximate extent of the corresponding pv cuts from the NOEMA data. Bottom row: three pv diagrams in color, with contours along the west–east line (offset 0 indicates west) shown in Fig. 6 in H¹³CO⁺, HCO⁺, and SiO. The color scale shows the corresponding NOEMA+30 m data, and the contours show the 30m data only. The red contours in the middle HCO⁺ panel also show the corresponding H¹³CO⁺ emission (30 m-only data). Contour levels are in 4σ steps.