NetCDF
From BAWiki
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.
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
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
Reduction of Dataset Size
Data
Synoptic Data
- NetCDF synoptic data at multiple locations,
- NetCDF synoptic data for multiple profiles,
- NetCDF cross section integral synoptic data for multiple profiles,
- NetCDF synoptic data for triangular grid,
- NetCDF synoptic (morphological) data for triangular grid,
- NetCDF synoptic data for unstructured grid,
- NetCDF synoptic data for unstructured grid with subgrid, and
- NetCDF DelWAQ data.
Time Series Data
Analysis Data
- NetCDF tidal characteristic numbers of water level, and
- NetCDF differences for tidal characteristic numbers of water level.
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