NOTE: This has been identified as critical to Met Office deliverables - please charge 2799991

This request came from Steven Chan at the UK Met office via MET-Help:


   https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=87015

He sent us two files, a rotated lat/lon data file and one with variable lat/lon spacing near the poles. The goal is to make the former work in MET but not the latter since MET doesn't support variable mesh grids. These files can be found on dakota:
  /d3/projects/MET/MET_Help/chan_data_20180921/schan_eurocordex.nc

Here's the portion of the CF-convention document for Rotated Lat/Lon:
   http://cfconventions.org/cf-conventions/cf-conventions.html#_rotated_pole

It specifies the *NORTH POLE* instead of the south pole, as in GRIB2. Also, the grid dimension and spacing must be determined from the coordinate info.

[MET-1055] created by johnhg