Panel a: difference between the obtained and the true position angle of the major axis d(PA) as a function of inclination angle for our set of models. Panel b: difference between the obtained and the true inclination angle di as a function of inclination angle. Panel c: mean shift of the obtained rotation curve relative to the true rotation curve as a function of the inclination angle. Panel d: mean shift of the obtained rotation curve as a function of the value of the scatter of the spaxel rotation velocities around the obtained rotation curve. Cases A and B are shown by circles and plus signs, respectively, in each panel.