Non-stream maps. Same as in Fig. 9 except the middle and right panels now show the face-on radial velocity (top row) and surface density (bottom row) maps of the off-stream material obtained with the metallicity- and streamline-based selections, respectively. As seen in Figure 9, the metallicity- and streamline-based selections identify somewhat different regions of the cold gas as streams, automatically resulting in different non-stream identifications. The regions marked with the orange ellipses (a, b, and c) are the primary sources of disagreement between the two classification methods as discussed in Sect. 5.3.