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Flood Plain Mapping using HEC-GeoRAS and ArcMap 10.3

Question asked by hasifmeera on Apr 16, 2017

How can I get complete bounding polygon of XS CutLines for flood plain mapping (Flood Inundation Mapping) using HEC-GeoRAS and ArcMap 10.3?

When I tried to perform this task, the bounding polygon formed was in an unexpected manner:


I want to get the bounding polygon without the gap that is visible around the river junction.