measured from the kinematic and photometric data we list in Table 2 values for the inclination, PA and differences between centers measured from the continuum images and velocity fields. Detailed discussion on the method used to obtain the center, PA of the major axis, and inclination of the galaxies are given in Amram et al. (1996). We included in the table not only the galaxies used in the Tully-Fisher relation but also those that were considered too peculiar or for which the gas extension was too short. We list in the last four columns the values of inclination and PA given by R1991 and N2000, when available.

A comparison of the inclinations derived from the Fabry-Perot map and from the continuum images was done by subtracting columns 2 and 3 of Table 2 (and normalized to one of the two). The differences spread approximately around zero, with an rms of 20% (for the galaxies used in the Tully-Fisher relation). This indicates that there is no systematic error introduced in the determination of the maximum velocities due to the measurement of the inclination from either photometric or kinematic data. However, a similar comparison with the smaller subsample in common with R1991 