Herschel intensity maps showing the areas used in the analysis. The maps show the total intensity after zero-point correction. (Top left) 350 μm (26.8″ resolution) showing the larger regions (A1, A2, B and C) and the background area (BG) used in the analysis. (Top right) 250 μm (18.3″ resolution) map showing the striation in L1642. (Bottom left) 160 μm (18.3″ resolution) showing the most prominent clumps identified by Getsources. FWHM ellipses of the clumps are drawn in the figure. (Bottom right) 100 μm (18.3″ resolution) showing the circular apertures (with 80″ diameter) used in the aperture photometry of the point sources marked in the figure.