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CAD tip CAD tip # 8932:

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HEC-RAS Import/Export in higher versions of AutoCAD Civil 3D.

A - answer The former add-on module "HEC-RAS Import Export Extension" for older Civil3D versions is no longer needed as it is already included in the standard functionality of AutoCAD Civil 3D 2013 (and higher). The link to the freely available application "HEC RAS" (River Analysis System by the US army and the Engineers' Hydrologic Engineering Center) for water flow analyis is now included in the standard Civil3D ribbon.

The command IMPORTHECRAS for importing .SDF files can be launched from the ribon Insert > Import > Import from HEC RAS:

The command EXPORTHECRAS for exporting .GEO files can be launched from the ribbon Output > Export > Export to HEC RAS:

100% *  CAD 
22.11.2012    8865×  
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applies to: AutoCAD Civil 3D 2013 ·

See also:
Tip 10414:FATAL ERROR when starting AutoCAD 2016 - Access Violation Reading 0x0018.
Tip 10062:Empty (white/transparent) Quick Access Toolbar - QAT.
Tip 9895:Missing or distorted parts of the ribbon or QAT panel.
Tip 9493:Inventor or AutoCAD or ReCap "stopped working" on a computer with two graphics cards.
Tip 9348:How to add custom paper format to AutoCAD? (grayed)

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