Static Data Defintion (The lists of values)
The system relies on the many sets of user-defined static values, which are subsequently used for the definition of the stations, station observations, during the key entry process, and for querying the database. Among the most important of these are:
- Observed elements – each observed element (temperature, pressure etc.) must be defined in the Clidata system; undefined elements cannot be stored in the database.
- Observation schemes – for each element the observation scheme is defined. The system requires the definition of all used observation schemes. The observation scheme defines the times in which the observation is carried out.
- Countries – the definition of all used countries must be in the Clidata system. The countries are used during the definition of the station geography.
- More detailed administrative subdivision of the country – the system allows two level detailed subdivision of the country.
- Units – definition of all units, which are later used for the definition of the element
- Historical units – definition of the units, which have been used recently, but are not used any longer. The system facilitates automatic transfer between the current and historical measurement units.
- Description of coded values – the short description can be stored for the values in the database which are represented by number codes.
- Instruments – the list of all instruments, which are used for measuring of the meteorological elements.
- Different times and time delays – all times used for the measuring of the data are defined. For example, GMT (Greenwich Mean Time) in comparison with CET (Central European Time) is one hour delayed. These time differences are later used during key entry process or during the import of the data into the database. If the default time of the database is CET and the import file is defined in GMT the values are automatically shifted to CET.
- Additional information about basins, pedology, anthropogenic influence, vegetation cover and relief – these lists predefine values which are later used for the extension of the station geography.
- Seasons – in the system several different seasons can be defined, e.g. spring, summer, autumn and winter or wet and dry seasons.
- Summer times – for each year the time period known as "Summer Time" can be defined. If the data are keyed in the CEST (Central European Summer Time), they are automatically stored in the default CET (Central European Time) if the CET is the default time of the database.