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- First Delft-FEWS finds the thresholdValueSet (V) that corresponds to the given time series. If there is no thresholdValueSet defined that corresponds to the given time series, then no warning levels are activated, i.e. "All clear".
- For the given time series only the data within a given time period is used. The TimeSeriesDialog and DataEditor use the period that is currently visible in the chart. The explorer user interface uses the relativeViewPeriod defined for the timeSeriesSet in the Filters configuration file. The ThresholdEventCrossingModule uses the relativeViewPeriod defined for the timeSeriesSet in the ThresholdValueSets configuration file. The ThresholdOverviewDisplay uses the configured aggregationTimeStep or relativePeriod in the ThresholdOverviewDisplay configuration file. Please note that in the ThresholdOverviewDisplay and in the Reports the data is read using the timeSeriesSets configured in the inputVariables. Therefore the relativeViewPeriods defined for the timeSeriesSets of the inputVariables must include the relativePeriod for which the most severe activated warning level has to be determined. Otherwise not all of the required data is read.
- If the given time series contains only missing values, then no warning levels are activated, i.e. "All clear".
- For each data value separately, Delft-FEWS considers each levelThresholdValue in V and determines if it has been crossed for the given data value (see above for definitions of crossed). Each levelThresholdValue that has been crossed, activates its corresponding warning level. From all the warning levels that are activated for the given data value, the most severe warning level is chosen. This is repeated for each data value within the given timeDisplay of thresholds in TimeSeriesDisplay
Configuring display options for the time series dialog
It is possible to define a custom color and linestyle for every threshold. The file file TimeSeriesDisplayConfig contains contains a specific element, thresholdDisplayConfig, in which for every threshold a linestyle and color can be defined. More information on how to configure the thresholdDisplayConfig can be found at 02 Time Series Display Configuration, under ThresholdDisplayConfig.
Colors to be used can be found found here