For users working with hydraulic modeling, HEC-GeoRAS remains a vital bridge for preparing geospatial data in ArcGIS for use in HEC-RAS. While HEC is shifting focus toward internal GIS capabilities in HEC-RAS Mapper, ArcGIS 10.8 users can still utilize GeoRAS for pre- and post-processing tasks. Key Features for Hydraulic Analysis
Coordinate System Errors: Ensure your Data Frame and all input layers (DEM, Shapefiles) share the same Projected Coordinate System. Geographic coordinates (Lat/Long) will cause calculation errors.
regsvr32 "C:\Program Files (x86)\HEC\HEC-GeoRAS\bin\GeoRAS.dll".mxd in the same folder as your RAS project. Avoid spaces in file paths.Important Technical Note: Before using the draft, please be aware that HEC-GeoRAS is not officially supported on ArcGIS 10.8. The last officially supported version is typically ArcGIS 10.5/10.6. However, the workflow below describes the common workaround used by professionals to run the tool on newer versions (10.7–10.8). hec georas for arcgis 10.8
: If upgrading, always uninstall previous GeoRAS versions before installing the 10.8-compatible version. Data Representation
XS Cut Lines: Cross-sections where hydraulic data is calculated. Troubleshooting Common Errors Toolbar disappears after restart: Re-register the
Preparation: Ensure ArcMap 10.8 is installed with 3D and Spatial Analyst enabled.
After the simulation, export the results as a RAS GIS Export File (.sdf.xml) from HEC-RAS. This contains water surface elevations, velocities, and flow areas. Important Technical Note: Before using the draft, please
Last updated: October 2024 – Compatible with ArcGIS 10.8.1 and HEC-RAS 6.x.