Just wondering what people’s preferred methods are for getting HEC-RAS encroachments (FEMA floodway) in to either CAD or ArcGIS for mapping purposes. I know you can export everything which I know how to do, but my issue is getting the floodway interpolated correctly between cross sections. My thought was to construct a surface using the ground elevations of where the encroachments are, and then the intersection of that surface with the actual stream surface file would be a properly interpolated floodway.
Just wondering if there are easier more straight forwarded approaches to doing this. Thanks for the help.