Left: The ΔAIC map between the one-layer and two-layer models. The color contours show the area where the two-layer model is selected and the colors indicate the kinematic components II-VI (I is the main component covering the whole map; see Fig. 6). Middle: Difference of evidences between the two-layer and the one-layer models toward the points with nested sampling overlaid on continuum image. The colors and sizes represent the difference. Right: The relative velocity, i.e., the velocity difference V_LSR,2 − V_LSR,1 of the layer one (front layer, τ₁(υ)) and layer two (rear layer, τ₂(υ)) in Eq. A.5, in the two-layer model.