HEC‑GeoRAS is an ArcGIS extension/toolbar that prepares geospatial data (terrain, cross‑sections, flow paths, floodplain polygons) for use with the U.S. Army Corps of Engineers’ HEC‑RAS hydraulic model. It converts GIS features into the geometric data HEC‑RAS needs and imports results back into GIS for mapping and analysis.
Operating System: Windows 10 and Windows 11 are supported for ArcGIS 10.8. hec georas for arcgis 108 upd
Migration Path:
Because the official USACE development of HEC-GeoRAS slowed down after the release of ArcGIS 10.x, there is no dedicated "HEC-GeoRAS for ArcGIS 10.8" installer released by the USACE. The last major official release was typically built for ArcGIS 10.5 or 10.6. HEC‑GeoRAS for ArcGIS 10
Applications of HEC-GeoRAS
RAS Themes: These include Stream Centerline, Main Channel Banks, and Cross Section Cut Lines. Prepare inputs Operating System: Windows 10 and Windows
Step 2: Run the installer as Administrator
Right-click HEC-GeoRAS_1021_Setup.exe → Run as Administrator.