Lines indicating where the channel geometry is extracted. Step 3: Running HEC-GeoRAS Tools
Use the . This generates an empty geodatabase feature dataset containing:
The (DEM raster, ArcGrid, or TIN)
In HEC-RAS, use File > Export GIS Data to create an .sdf file. hec georas for arcgis 10.8
: Uninstall any previous versions of GeoRAS or GeoHMS first. Install (version 10.8.0.34 or higher), then HEC-GeoRAS 10.8 Activation : After installation, enable the tool in ArcMap via Customize > Extensions (check HEC-GeoRAS) and then Customize > Toolbars to display the interface. Esri Community Workflow for ArcGIS 10.8
If you describe your specific modeling goal (e.g., floodplain mapping, dam break, bridge hydraulics), I can suggest whether GeoRAS on 10.8 is the right choice or if an alternative is better.
: Assigns downstream distances along the centerline. Lines indicating where the channel geometry is extracted
Ensure your DEM is in a raster format supported by Spatial Analyst and that the layer is checked as visible in your Table of Contents.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. HEC-GeoRAS Downloads - Hydrologic Engineering Center : Uninstall any previous versions of GeoRAS or GeoHMS first
Ensure all data is in a projected coordinate system (not geographical/degrees). Units must be consistent (e.g., feet or meters).
With your geometry successfully exported, the core modeling shifts away from ArcGIS: Open and start a new project.