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

XML2GDB tool at runtime. Figure 4.40 shows the schematic of this applicationunder the ModelBuilder workflow.Figure 4.40 XML2XSElev Model ComponentFrom the programmatic standpoint, the application first gets a hold of thesource XML document and navigates through it to extract the flow profile namesused for the hydraulic simulation in HEC-RAS. All the profile names found arestored in a collection of profile names called “colProfiles” for later reference inthe code. Once the XML2XSElev application knows the outcome flow profiles itadds the profile elevation fields to the cross section feature class.Next, the application reads the cross section feature class and loopsthrough each cross section features extracting the RASCode “triplet” (a stringmade up of the combination of StreamID, ReachID, and Station as shown inFigure 4.39) identifying it. After extracting the RASCode for each cross section,the application navigates the XML file (using the DOM as an object orientedparsing tool) and gets the water surface elevation value for the current crosssection RASCode and for each profile.160