Top: grayscale of the 8 μm GLIMPSE image of GMF 18.0-16.8. The white contour shows the ¹³CO integrated intensity of 2 and 7 K km s^-1. IRAS sources and W 37 are marked with blue stars, and Hii regions found in the CORNISH survey are shown in blue circles. M 16 is a prominent emission source in this region, north of the filament but at a consistent characteristic velocity. Bottom: color scale of the centroid velocity field from the GRS ¹³CO data where the integrated intensity is above 1 K km s^-1 in the indicated velocity range, shown in the color bar in km s^-1. The blue contour is ATLASGAL 870 μm emission of 250 mJy beam^-1. In magenta circles, we show all v_lsr measurements of BGPS clumps that have velocities within the ¹³CO velocity range and with × those v_lsr values outside of the ¹³CO velocity range. The magenta diamonds are positions in the Wienen et al. (2012) catalog with a matching velocity. The black contours are the ¹³CO integrated intensity at 2 and 7 K km s^-1.