Converting a NEXRAD Rainfall Map into a Flood Inundation Map by ...

SchematicNodes and identify the ones with a valid (not Null) Model Code andstore them in a collection (a container of multiple data types) of flow changelocation points. The collection of flow change points is used to filter the B part inthe HEC-DSS catalog. Knowing the B part alone is not enough to classify neededrecords. To further identify the pathnames associated with hydrographs at flowchange points, the application also filters the content of the catalog by thebeginning date (D part), the time interval of the time series records (E part), andthe optional project descriptor (A Part). This way, the application loops throughthe entire DSS catalog and selects the time series blocks that meet the filtercriteria.Every time the application navigates the DSS catalog and finds a matchfor the filter criteria, the application extracts the remaining pathname parts and theheadings of the pathname. That is, the application retrieves the variable type (CPart), the user-defined description of the data source (F Part), and the DSS datatype (regular or irregular time series, paired/curve data).When the application finds a pathname that matches the filter criteria forany of the flow change points, it searches the HydroJunction feature class for itscorresponding HydroID value (the unique identifier inside the geographiccomponent) and writes that value as the FeatureID in the TimeSeries table. In thisway the application now knows the time series value and the feature to which itbelongs.120