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

catalog list. For the DSS2GDB application, the program selects those pathnamesassociated with flow change locations and extracts the time series type using theZDTYPE DSS subroutine to decide what subroutine should be used for extractingthe time series values and to define the time series type descriptor in Arc Hydro.Even though the time series used and generated for the Map2Map application areregularly spaced intervals, the application checks for other types of time series toprovide a generic approach.In Arc Hydro the time series type it is stored in the TSType table under theIsRegular Boolean field. The corresponding equivalences between the time seriestype classifications in Arc Hydro and HEC-DSS are shown in Table 4.8.Table 4.8: Time Series Type Equivalence between HEC-DSS and Arc HydroAfter the ZRRTS DSS subroutine is executed, and the time series areextracted from HEC-DSS, the application invokes ZCLOSE, the DSS softwaresubroutine in charge of releasing control of a DSS file from an external program.This closing subroutine is quite important to make sure the DSS file becomesavailable to other external programs. From the programmatic perspective thissubroutine must be carefully implemented since it should be invoked even if anerror is generated during execution. That is, the error handling component must137