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An import file (local or on an OPeNDAP server) can contain multiple variables. For each time series set in the import configuration the import uses the external parameter id from the id map configuration to search for the corresponding variable(s) in the file(s) to import. If a corresponding variable is found, then the data from that variable is imported. Only data for the configured time series sets found variables is downloaded and imported, all other data in the import file(s) is ignored.
For NetCDF files the external parameter id is by default matched to the names of the variables in the NetCDF file to find the required variable to import. There also is an option to use the standard_name attribute or long_name attribute of the a variable in the NetCDF file as external parameter id. To use this option add the variable_identification_method property to the import configuration, just above the time series set(s). For example:
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variable_identification_method | behaviour |
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standard_name | The All external parameter id is ids are matched to the standard_name attributes of the variables in the NetCDF file to find the required variable(s) to import. |
long_name | The All external parameter id is ids are matched to the long_name attributes of the variables in the NetCDF file to find the required variable(s) to import. |
variable_name (default) | The All external parameter id is ids are matched to the names of the variables in the NetCDF file to find the required variable(s) to import. |
If the variable_identification_method property is not present, then the "variable_name" is used by default. The variable_identification_method property currently only works for import types "NETCDF-CF_GRID", "NETCDF-CF_TIMESERIES" and "NETCDF-CF_PROFILE".
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