  Using GALAH survey data of nearby stars, we look at how structure in the
planar (u,v) velocity distribution depends on metallicity and on viewing
direction within the Galaxy. In nearby stars, with distance d < 1 kpc, the
Hercules stream is most strongly seen in higher metallicity stars [Fe/H] > 0.2.
The Hercules stream peak v value depends on viewed galactic longitude, which we
interpret as due to the gap between the stellar stream and more circular orbits
being associated with a specific angular momentum value of about 1640 km/s kpc.
The association of the gap with a particular angular momentum value supports a
bar resonant model for the Hercules stream.
  Moving groups previously identified in Hipparcos observations are easiest to
see in stars nearer than 250 pc, and their visibility and peak velocities in
the velocity distributions depends on both viewing direction (galactic
longitude and hemisphere) and metallicity. We infer that there is fine
structure in local velocity distributions that varies over distances of a few
hundred pc in the Galaxy.
