Maps of FUV radiation field strength, G₀ (left), hydrogen nuclei density, n (middle), and χ² (right) determined from fitting the adjusted [Cii], [Oi]63, and F_TIR emission with the Kaufman et al. (1999, 2006) PDR model on a pixel-by-pixel basis. We compare the results from the observations adjusted via the -based (upper panels) and -based corrections (lower panels) described in Sect. 3.5. The maps are centred on , (J2000.0) and are presented in the resolution and pixel size of the PACS 160 μm map. Contours from the F_TIR map (see Fig. 1) are superimposed on each image as a visual aid with levels as listed in Fig. 4. North is up, east is to the left.