format
Columns wind$x and wind$y are location, while
  wind$z is the wind speed, in m/s.source
The data are taken from Figure 5 of Koch et al. (1983).References
S. E.  Koch and M.  DesJardins and P. J. Kocin, 1983.  ``An
interactive Barnes objective map anlaysis scheme for use with satellite
and conventional data,'' J.  Climate Appl.  Met., vol 22,
p. 1487-1503.See Also
See interpBarnes, which uses the present dataset as a
    example.