Data moment maps of the gas in the central 20 kpc produced with the symmetrized gSb at the selected snapshot (T = 500 Myr). The pixel scale is 0.2 kpc. The point (0, 0) corresponds to the center of the bar. The gas component has been inclined by i_true = 30° and rotated so the bar is aligned with the kinematic axes: the galaxy minor axis (left column) and major axis (right column). First row: Integrated intensity maps (moment 0) in logarithmic norm. Second row: Mean velocity field (moment 1) maps. The black curves show the isovelocity contours of levels [−150, −100, −50, 0, 50, 100, 150] km s⁻¹.