Comparison between the different sets of geometrical parameters for our sample of galaxies. Panel a: differences between the coordinates of the kinematical center of galaxies dXo and dYo derived using DAP and our measurements. Panel b: differences between two determinations of the kinematical inclination angle, and between the kinematic and photometric inclination angles. Panel c: differences between two determinations of the position angle of the major kinematical axis, and between the position angles of the major axis and the major photometric axis. See text for details.