Spatial distribution of the line integrated intensity for some of the detected lines in the 3 mm band, plus the dust temperature (bottom left panel) and the visual extinction (top right corner). Continuum data comes from the publicly available SED fit done by Lombardi et al. (2014) on the Herschel Gould Belt Survey data (PI: P. André). The color-scales are logarithmic to reveal the distribution of faint signal. Pixels with a signal-to-noise lower than four were blanked out. In addition to the circles and crosses that show the approximate boundaries of the H ii regions and the associated exciting stars, we overlaid broken lines that were somewhat arbitrarily drawn by connecting the N₂H⁺ (1-0) emission.