[gradsusr] Files for polar stereographic plotting

[sim.aberson]

I have written fortran code to output fields on a south polar 
stereographic grid.  When I plot, the values seem to drift from their 
correct location as I get further into my file, so I am doing something 
wrong.  My control file has:

  XDEF    360   LINEAR  -180.000     1.000000
  YDEF    300   LINEAR   -90.000     0.009009

When I write the file, do I write the 360 points at -90 latitude (even 
though they are all the same value), or is GrADS just expecting one 
value there, followed by the 360 points for the next latitude.  I am 
doing the former, but if GrADS is expecting the latter, that could 
account for the drift.

I could not find this information in the online documentation.

Thanks
-- 
Sim Aberson         AOML/Hurricane Research Division          Miami, FL
     "Hurricane states erect statues in my honor." -- David Sedaris