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

[netCDF #QKQ-233907]: creating a Netcdf file with projection info.

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [netCDF #QKQ-233907]: creating a Netcdf file with projection info.
  • Date: Thu, 05 Jun 2014 14:07:53 -0600
Hi Bin,

> I am trying to create a netcdf file with projection information, e.g. a 
> landsat scene in UTM projection.
> I do not find any dedicated API for putting geo-referencing information into 
> the metadata of netcdf file. Should I simply write such info, e.g. projection 
> type, coordinates of upleft corner etc., as a regular metadata?
> If there is any special rules for writing geo-referencing information, could 
> you please direct me where the manual/examples/guide is?

We recommend using the international standard NetCDF CF Metadata Conventions

  http://cfconventions.org/

which specifies how to represent projection information in "Appendix F. Grid 
Mappings":

  http://cfconventions.org/1.6.html#appendix-grid-mappings

Note that the above is document is CF version 1.6 from December 2011.  There is 
currently
much active discussion on additions for CF version 1.7, including 
representation of
satellite data.

  http://mailman.cgd.ucar.edu/pipermail/cf-metadata/

Many of the relevant postings on the cf-metadata mailing list start with 
questions or proposals about representing GOES-R data products.  For example, 
take a look at this posting and follow-ups:

  http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2014/057095.html

There is also a separate mailing list devoted to cf-satellite conventions, with 
about 5 years of postings here:

  http://www.unidata.ucar.edu/mailing_lists/archives/cf-satellite/

--Russ



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



Ticket Details
===================
Ticket ID: QKQ-233907
Department: Support netCDF
Priority: Normal
Status: Closed