According to the Unidata website the Network Common Data Form (NetCDF) software was originally intended to create, access, and share array-oriented data in a form that is self-describing and portable. These deal with a variety of data types that encompass single-point observations, time series, regularly-spaced grids, and satellite or radar images.
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EFDC+ can currently write the native output in NetCDF-CF format for Windows and Linux. EFDC_Explorer (the pre-and post-processor for EFDC+) can also convert the binary files output by EFDC+ (*.OUT) to netCDF.nc files, including the derived water quality parameters. EFDC+ currently exports 44 parameters to NetCDF format. This allows EFDC+ output to be read and displayed on web servers.
EFDC+ exports the NetCDF files at the same interval that it produces the model linkages files, which is set in the tab for Timing and Linkage | Linkage | NetCDF.
The main configuration for NetCDF output is in the EFDC_Exlporer Linkage | NetCDF tabs as shown in 240419309 Figure 1. Here the user can turn on netCDF output by checking the Output to NetCDF checkbox. The user may select the level at which the NetCDF data is compressed with the Deflate Level setting. This can range from 1, no compression, to 9 for maximum compression, but is recommended by Unidata to be set to 2 for the best balance between file size and speed.
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To demonstrate the netCDF output is consistent with the data viewed in EE, a number of comparisons have been made for different models. Examples of an output from the West Lake WQ model in EE, ArcGIS, and ncWMS are shown in 240419309 Figure 3, Figure 4 and Figure 5 respectively. Note that the West Lake model may be downloaded from the EE website.
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