s.to.rast rountine

  I am using the grass routine s.to.rast to convert meterological data to
a raster so point in polygon searches can be accomplished. The only problem
that I have is that some of the sites fall in the same grid cell and only
the last one is actually assinged to the raster.
  Ideally I would like to get some type of message telling me that this
is occuring and then the value(station number) displayed to the screen or to
a file. Can anyone point me in the right direction towards achieving this.
  Note that I am already using a fine raster 1 minute global scale
and that going any finer is going to provide a severe hinderance.

Craig
caa@noaacrd.colorado.edu