Residuals for extinction maps calculated for the Pipe Nebula at a resolution of 300″. The reference is the Lombardi et al. (2006) NICER map that has been convolved to the resolution of 300″ (see text). Residuals are shown for NICER (frame a)), Method B (frame b)), and Method T (frames c) and d)). Method T uses the NICER map of frame a (frame c)) as a template of the small-scale structure or the Lombardi et al. (2006) NICER map at the full 60″ resolution (frame d)). Frames d)–g) show the corresponding data as scatter plots with the reference data on the x-axis. The maps are in Galactic projection and have a size of 3.22 × 3.22 deg.