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timeSeriesSetId & constraints
Instead of a an extensive definition of all possible time series that usually will be repeated for different types of locations and various districts, it is possible to define the timeSeriesSets once and to use it various times through all filters. At this point you refer to such a timeSeriesSets and optionally add some constraints on the location attributes. Notice that location attributes only can be defined in the locationSets for locations that are read from an ArcGIS shape DBF file. See the example below.
It is possible to define filters that may become empty: no locations comply with the constraints. These filters are not displayed. An advantage of this approach is that all possible filters can be defined once and automatically become visible when a location complies to the constraints.