Dear all,
Looking again at the CF specification for a rotated-pole grid, it
seems to be underspecified. There are an infinite number of
coordinate systems for a given pole location because the "new globe"
can be rotated about its axis - don't we need some more information?
So perhaps the lon and lat arrays are not redundant after all... ;-)
Cheers, Jon
On Wed, Jun 17, 2009 at 3:45 PM, Jon Blower<j.d.blower at reading.ac.uk> wrote:
> Dear all,
>
> We have some data that use a rotated pole grid. ?The CF convention for
> describing this is here:
> http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.html#id2985006.
> ?Are the 2D lon and lat variables in this example really necessary?
> They would seem to be redundant as their values can be calculated from
> rlon, rlat and the location of the new "north" pole.
>
> Thanks, Jon
>
> --
> Dr Jon Blower
> Technical Director, Reading e-Science Centre
> Environmental Systems Science Centre
> University of Reading
> Harry Pitt Building, 3 Earley Gate
> Reading RG6 6AL. UK
> Tel: +44 (0)118 378 5213
> Fax: +44 (0)118 378 6413
> j.d.blower at reading.ac.uk
> http://www.nerc-essc.ac.uk/People/Staff/Blower_J.htm
>
--
Dr Jon Blower
Technical Director, Reading e-Science Centre
Environmental Systems Science Centre
University of Reading
Harry Pitt Building, 3 Earley Gate
Reading RG6 6AL. UK
Tel: +44 (0)118 378 5213
Fax: +44 (0)118 378 6413
j.d.blower at reading.ac.uk
http://www.nerc-essc.ac.uk/People/Staff/Blower_J.htm
Received on Thu Jun 18 2009 - 07:16:48 BST
