Methanol masers: 870 μm flux density at the peak of the condensations in the directions of which 6.7 GHz methanol masers are detected. The nearby bubbles are identified by their number (e.g. “12” for N12). The black condensations also contain one or several UC H ii regions; no UC H ii regions have been detected in the direction of the light grey condensations. Note that the scale along the two axes differ by a factor ten.