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Civil 3d hec ras6/18/2023 The HEC-RAS format is an ANSI text file that you could open in Notepad if you wanted, where as the Autodesk SDF format is more of an SQlite format. What the client didn’t realize is the HEC-RAS SDF format is not the same format that Map3D uses. They received the following error when trying to import the files, using both the above methods. Unfortunately, both of these options failed. The client also tried importing them using the data connect dialogue box, located in the Planning and Analysis workspace of Civil 3D. They had received the files from a consultant, and were trying to import them using “mapimport”. Recently, I had a client contact me, trying to import SDF files that were exported from HEC-RAS, a computer program that models the hydraulics of water flow through natural rivers and other channels, into Civil 3D.
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