Comparison of the median vertical velocity maps for the different LMC Combined samples (top: complete sample; bottom: optimal sample) obtained with different assumptions about the LMC disc plane. Left: Results for the best-fitting flat plane, obtained by minimising the RMS vertical velocity v_z′, with viewing angles listed in the panels. Right: Results for the best best-fitting warped plane, with viewing angles shown in Fig. 12. When comparing the top and bottom panels, the reader should note that the overdensity lines differ slightly because each LMC sample uses a different disc plane.