Position-velocity maps toward the NGC 6334 extended region. Top:¹³CO (red) and ¹²CO (black) emission contours overlaid on the 870µm ATLASGAL dust emission (greyscale). The contour levels are the same as in Fig. 4. Middle and Bottom: position-velocity maps of ¹³CO and ¹²CO, respectively. The dotted red lines in the top image show the path along which the PV maps are constructed. The offsets are the projected path length along the galactic longitude from east to west along the strip. On the PV maps, the projected offset positions of the FIR sources (I[N], I to V from right to left) in the central filament and GM-24 region are indicated by the dotted black markers at the bottom.