Orthographic view of the intensity maps. First row show the 353-GHz map from Planck downgraded at N_side = 64 and the corresponding map of uncertainties that we use to compute the χ². Rows two to four correspond to dust density distribution models labeled ED, ARM4 and ARM4⊕ED, respectively.The obtained best fits are shown in the first column and the statistical significance of the residual, per-pixel, are shown in the second column. The north Galactic pole is on the right-hand side panel and the vertical solid line is for Galactic longitude zero. Galactic latitude decrease counter-clockwise on the right panel and clockwise in the left panel.