Large-scale velocity structure of the cold neutral medium (CNM) measured as HISA (top panel) and of the molecular gas measured in ¹³CO(1–0) (bottom panel, Jackson et al. 2006). The color scale shows in both panels the first moment maps (intensity-weighted peak velocities), and the contours show the 875 μm emission from the ATLASGAL survey (Schuller et al. 2009; contour levels start at the 4σ level of 200 mJy beam⁻¹ and continuein 8σ steps up to 1.8 Jy beam⁻¹). The white box outlines the approximate region imaged with APEX in the [CI] and ¹³CO(3–2) emission. Scale bars are shown within the box.