[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[netCDF #GGI-666903]: question about standard grids in CF convention

Hi John,

> We've been developing a netCDF3 product and trying to comply with CF
> conventions. We want the product on one of the standard grids, e.g.,
> global equal area cylindrical. We would like to use a netCDF3 standard
> grid so that we don't need to include the latitude/longitude pair for each
> gridpoint - but were told that the CF convention requires a lat-lon value
> for each gridpoint regardless of the grid projection selected/used - i.e.,
> that the grid and projection parameterization in the CF convention is not
> complete enough for clients (e.g., IDV) to compute a gridpoint lat-lon.
> Just want to confirm - doesn't seem to make sense to me - why have
> standard grids if you need to include lat-lon values for every gridpoint?
> I'd welcome any clarification you can offer.

There's a discussion of exactly this issue on the CF conventions
mailing list that clarifies why lat/lon pairs are still required for
CF compliance.  The mailng list thread of 12 postings starts here:


Steve Hankin's response is especially comprehensive and persuasive.
For more discussion of the issue, you can see the CF Trac tickets #9
and #18

I hope that helps.


Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu

Ticket Details
Ticket ID: GGI-666903
Department: Support netCDF
Priority: Normal
Status: Closed

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.