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Since 2008 a new Transformation module is developed for Delft-FEWS. The idea was that this module would replace the old transformation and several other Delft-FEWS modules in a period of 5-10 years. Now that most functionality is available in the new Transformation module, the old module will be removed from the Delft-FEWS code in 2023. This page provides some guidance in how to convert old transformations and interpolations to the new transformation module. It contains a table of commo commonly used functions and some xml examples. Please add more examples if these are missing and useful for other Delft-FEWS users.

Documentation on the individual modules can be found on the WIKI:


From Old Transformation to New Transformation

When the FEWS Release says 2022.01, this means that the function was missing in the FEWS releases prior to 2022.01 and has been added in 2022.01 FEWS release.

Old Function GroupFunction / RuleNew Function GroupFunction / RuleXML Example / DocumentationIn FEWS Release



zeroDegreeAltitudeNot tested yet2022.01
disaggregateconstantdisaggregationconstantTransformation - Disaggregation (Constant)2022.01