Revision as of 11:10, 14 April 2014

General Aspects

Purpose of these BAWiki Pages

These BAWiki pages do describe all NetCDF conventions required to store baw-specific data in NetCDF data files (see network common data form). I. e. all local conventions are listed, which go beyond the international agreed-upon CF-metadata convention. These pages are also meant as a discussion ground for agreeing on those additional conventions required.

In cases where the international agreed-upon conventions are insufficient, one should first check whether extensions described in Deltares-Conventions can be used or not - it is recommended to discuss further required extensions with Deltares. The version which has been recommended to become a standard can be found on the GITHUB. Further activities related with OpenDAP to extract a selection of data defined on unstructured grids can be found on e. g. OPULS.

The additional conventions should be listed in the global NetCDF attribute Conventions, e. g. in the following way:

// global attributes:

:Conventions = "CF-1.4/Deltares-0.1/BAW-0.1" .

The BAW instance of a NetCDF file developed since 2010 is a file of type CF-NETCDF.NC.

Terminology

Global Attributes

NetCDF global attributes

Grids

NetCDF multiple locations: several (point) locations, e. g. equivalent to contents of file location_grid.dat;
NetCDF multiple profiles: several longitudinal and cross-sectional profiles, e. g. equivalent to contents of file profil05.bin;
NetCDF triangular grid: triangular grid, e. g. equivalent to contents of file gitter05.dat and gitter05.bin;
NetCDF unstructured grid: unstructured grid, e. g. equivalent to contents of file untrim_grid.dat;
NetCDF unstructured grid with subgrid: unstructured grid with additional subgrid data, e. g. equivalent to contents of file utrsub_grid.dat.

Time Coordinate

NetCDF time coordinate: date and time, calendar.

Vertical Coordinate

NetCDF vertical coordinate: dimensional vertical coordinate (height, depth).

Horizontal Coordinate Reference System

NetCDF grid mapping variable

Reduction of Dataset Size

Data

Synoptic Data

Time Series Data

Analysis Data

back to Standard-Software-Applications (Add-ons)

Overview

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 ==Purpose of these BAWiki Pages==
-These BAWiki pages do describe all NetCDF conventions required to store baw-specific data in NetCDF data files (see [http://www.unidata.ucar.edu/software/netcdf/ ''network common data form'']). I. e. all ''local'' conventions are listed, which go beyond the international agreed-upon [http://cf-pcmdi.llnl.gov/ CF-metadata convention]. These pages are also meant as a discussion ground for agreeing on those additional conventions required.
+These BAWiki pages do describe all NetCDF conventions required to store baw-specific data in NetCDF data files (see [http://www.unidata.ucar.edu/software/netcdf/ ''network common data form'']). I. e. all ''local'' conventions are listed, which go beyond the international agreed-upon [http://cf-convention.github.io/ CF-metadata convention]. These pages are also meant as a discussion ground for agreeing on those additional conventions required.
 In cases where the international agreed-upon conventions are insufficient, one should first check whether extensions described in  [http://public.deltares.nl/display/NETCDF/netCDF Deltares-Conventions] can be used or not - it is recommended to discuss further required extensions with [http://www.deltares.nl/ Deltares]. The version which has been recommended to become a standard can be found on the [https://github.com/ugrid-conventions/ugrid-conventions GITHUB]. Further activities related with OpenDAP to extract a selection of data defined on unstructured grids can be found on e. g. [http://docs.opendap.org/index.php/OPULS:_UGrid_Subsetting OPULS].

NetCDF: Difference between revisions

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