\begin{table}%t1
\caption{The systemic velocity and distance to the spiral arms along the line 
of sight toward Wd~1 determined with the Spiral arm model in Fig.~\ref{mw} and
the rotation curve in Fig.~\ref{rot}.}
\label{sparm}
%\centering
\small
\begin{tabular}{lcc}
\hline\hline
%&& \\[-8pt]
Spiral Arm & $v_{\rm sys}$ [km~s$^{-1}$] & $d_{\rm lit}$ [kpc] \\
%&& \\[-8pt]
\hline
Sagittarius I & --17 & 1.5 \\
Scutum-Crux I & --52 & 3.5 \\
Norma I & --89 & 4.9 \\
Norma II & --35 & 11.5 \\
Scutum-Crux II & +6 & 15.0 \\
Sagittarius II & +26 & 18.4 \\
\hline
\end{tabular}
\end{table}