Three-color composition image (or RGB image) from Spitzer GLIMPSE 8 μm (red), 4.5 μm (green), and 3.6 μm (blue) bands (Benjamin et al. 2003; Churchwell et al. 2009) for the HC H II regions discussed in Sect. 4. Lime or red circles show the radio sources in the field from the CORNISH survey. The upper-right zoomed-in images for each panel show the peak position of H₂ O maser (magenta cross) and OH maser (black cross), and the linear scale-bar of 0.1 pc in white. Gray contours in the image show 870 μm emission from ATLASGAL (Schuller et al. 2009), and the lime (or red) contours show K-band 22 GHz emission presented in this work. The red contours in the bottom-right panel show X-band 10 GHz emission as the K-band emission is missing for source G045.0694. The FWHM beam of GLIMPSE (2′′) and K-band observationsare indicated by the white circles shown in the lower-left corner of each image.