Share Email Facebook Twitter LinkedIn HEC-RAS Import and Export Topics in this section About HEC-RAS Import and Export Use the Export To HEC-RAS command to export Autodesk Civil 3D data in HEC-RAS format, and use the Import HEC-RAS command to import the data you export from the HEC-RAS software. To Prepare Data to Export to HEC-RAS Format To Export Data to HEC-RAS Format To Import Data from HEC-RAS To Import Data into and Export Data from HEC-RAS Software HEC-RAS Import and Export Command Reference Parent topic: File and Data Sharing