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

[netCDF #KMU-404361]: netCDF General - NetCDF representation of a "structured grid"

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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 #KMU-404361]: netCDF General - NetCDF representation of a "structured grid"
  • Date: Thu, 30 Nov 2006 09:26:45 -0700
Hi Stu,

There are multiple ways to represent such grids in netCDF, so what you really 
need is a convention.  For example, the CF Conventions 1.0 has a section on 
Grid Mappings and Projections:
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.0/cf-conventions.html#grid-mappings-and-projections
that shows one agreed upon method for representing multidimensional grid 
mappings, and there is also an appendix to the CF conventions that gives more 
specific examples of grid mappings based on projections.  See also the example 
in section 5.2 of the CF conventions for how to handle coordinates and 
coordinate systems that are not defined by a projection.

Work is underway to extend the CF conventions to handle unstructured grids and 
meshes.  If the current CF conventions version 1.0 is not sufficient for your 
needs, it may be covered by one of the new conventions being proposed.  For 
examples of this work, see the presentations from the recent   NOAA Community 
Standards for Unstructured Grids Workshop:

  http://cf-pcmdi.llnl.gov/trac/wiki/BoulderWorkshop

--Russ


--Russ

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



Ticket Details
===================
Ticket ID: KMU-404361
Department: Support netCDF
Priority: Normal
Status: Closed