Frequency distribution of the parameter values in the (lg(T_b,0),lg(FWHM)) plane for all Gaussians obtained in the decomposition of the LAB. Isodensity lines are drawn in the scale of lg(N + 1) with the interval of 0.2. The two main maxima, corresponding to WNM and CNM are labeled with the values of corresponding Gaussian FWHM. The blue thick solid line represents the selection criterion defined by Eq. (4) of Haud & Kalberla (2006).