Does anyone know of galactic rotation data (any galaxy) of the following form: For simplicity assume an [x y z] coordinate system with the origin in the center of the galaxy and [x y] representing the plane of rotation. At any point [x y z] there is a corresponding velocity vector [vx vy vz] representing the motion of matter at that point. For objects in a galactic plane (that is: z near 0), the expectation is that vz is near 0 and the vector [vx vy] is at right angles to the radius vector to [x y]. A difference from the expectation is said to be peculiar motion. I imagine a display of this data as a galactic-shaped 3D graph with an arrow at each sample point. I imagine the data base describing this data as a table with six columns [x y x vx vy vz] or perhaps something similar using spherical coordinates. A science librarian and a cosmologist have said they do not know of any such dataset. Please note the considerable elaboration of this request as contrasted to merely speed as a function of radial distance from the center.