Superimposition plot of the maser distribution (Fig. 2) and the detected proper motions (upper panel in Fig. 5) on the fitted disk model (lower panel in Fig. 5). Colors of the maser spots and the model arrows indicate the LSR velocity (color-velocity conversion code shown on the right of the plot). Colors of the cones associated with each maser cluster indicate the LSR velocity, with the range of the velocities within a cluster ([min:max]) shown in the top left corner. The scale for the amplitude of the arrows and the cones is shown in the bottom right corner.