Filamentary cloud IRDC 18223: left panel presents the Spitzer 24 μm image in color (Beuther & Steinacker 2007) and the MAMBO 1.2 mm continuum map in contours (Beuther et al. 2002) with levels from 5 to 95% of the peak emission of 753 mJy beam^-1 (in 10% steps). The 2nd and 3rd panels present the Nobeyama 45 m N₂H⁺(1–0) 1st- and 2nd-moment maps, respectively (Tackenberg et al. 2014). Right panel shows the Herschel 70 μm observations (in color) and in contours the IRAM 30 m C¹⁸O(2–1) data integrated from 40 to 49 km s^-1. The contours are from 5 to 95% of the peak emission of 18.6 K km s^-1 (in 10% steps). Additionally, the second panel shows the two main sources (the HMPO IRAS 18223-1243 in the north and IRDC 18223-3 in the south), a scale bar, as well as the positions of the 10 observed mosaic fields.