Volume density and kinetic temperature contour plots showing the results from the LVG analysis for CH₂NH towards GMC 7 (blue), GMC 6 (green), pSSC 5 (magenta), and pSSC 2 (orange). The contours show the 1σ solutions obtained for the minimum ${\chi }_r^2$ value in the column density parameter. The best fits are marked by black stars, while the best fit for the emission size (θ_s) are indicated in the bottom-left corner of the figure. The vertical grey line indicates the maximum temperature at which the rates are calculated.