Overview

This export is available in DELFT-FEWS versions after 28-10-2009 (FEWS version 2009.02)

Exports data to NetCDF files which comply to the CF 1.4 standard.

To indicate that data values are missing , NetCDF-CF exports use float value 9.96921e+036 by default. It is possible to change it by entering a different missing value (NaN or other) in the configuration files. Use option <exportMissingValue> in TimeSeriesExport module, and <missVal> in GeneralAdapter
More information about the cf standards can be found at: http://cfconventions.org/

There are six types of NetCDF-CF exports which can be defined:

Configuring the export

An example of the NETCDF-CF_PROFILE_MATROOS export can be found at NETCDF-CF_PROFILE. The only difference is that the exportType must be changed to NETCDF-CF_PROFILE_MATROOS.

The structure of the netCDF file which is created is shown below.

200101010000_example.nc
netcdf 200101010000_example {
dimensions:
	time = UNLIMITED ; // (4021 currently)
	nonodes = 1113 ;
	nchar = 40 ;
	noelements = 1110 ;
	nodesperelement = 2 ;
variables:
	float time(time) ;
		time:standard_name = "time" ;
		time:long_name = "time" ;
		time:units = "minutes since 1970-01-01 00:00:00.0 +0000" ;
		time:axis = "T" ;
	float y(nonodes) ;
		y:standard_name = "projection_y_coordinate" ;
		y:long_name = "y coordinate in local grid" ;
		y:units = "m" ;
		y:axis = "Y" ;
		y:_FillValue = 9.96921e+036f ;
	float x(nonodes) ;
		x:standard_name = "projection_x_coordinate" ;
		x:long_name = "x coordinate in local grid" ;
		x:units = "m" ;
		x:axis = "X" ;
		x:_FillValue = 9.96921e+036f ;
	char nodenames(nonodes, nchar) ;
		nodenames:long_name = "name of the node <branch>_<offset>" ;
	int connections(noelements, nodesperelement) ;
		connections:long_name = "Left and right node for each element" ;
		connections:_FillValue = -999 ;
	float waterlevel(time, nonodes) ;
		waterlevel:long_name = "Waterlevel" ;
		waterlevel:units = "m" ;
		waterlevel:_FillValue = -9999.f ;

// global attributes:
		:title = "Netcdf data" ;
		:institution = "Deltares" ;
		:source = "export NETCDF-CF_PROFILE_MATROOS from FEWS" ;
		:history = "Created at Thu Oct 15 08:32:40 GMT 2009" ;
		:references = "http://www.deltares.nl" ;
		:Conventions = "CF-1.4" ;
		:coordinate_system = "RD" ;
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