Velocity-integrated line intensities (moment 0) maps in units of K km s⁻¹ for H¹³CN (2–1), (3–2) and (4–3). All of the maps shown were generated using a signal-to-noise cutoff of 3. The studied SSC regions as listed in Table 4 are labelled in white text on the map. The original SSC locations with appropriate beam sizes are from Leroy et al. (2018). The ALCHEMI $1\stackrel{″}{.}6\times 1\stackrel{″}{.}6$ beam is displayed in the lower-left corner of the map.