Release Notes

Digital Terrain Cross Section Cutting
Extract HEC-RAS cross sections from 3D digital elevation terrain data. Utilize AutoCAD Civil 3D surfaces, contours, TINs, DTMs, DEMs, survey points and other external digital elevation terrain data.

LandXML TIN Surfaces as Terrain Elevation Data
The software can use AutoCAD Civil 3D, Bentley MicroStation, and other TIN surfaces to determine cross section geometry when cutting cross sections. TIN surfaces are imported as LandXML files.

Support for Survey Point Data
Survey point supported formats are:

• EN (Easting, Northing)
• ENZ (Easting, Northing, Elevation)
• NE (Northing, Easting)
• NEZ (Northing, Easting, Elevation)
• PEN (Point, Easting, Northing)
• PENZ (Point, Easting, Northing, Elevation)
• PEND (Point, Easting, Northing, Description)
• PENZD (Point, Easting, Northing, Elevation, Description)
• PNE (Point, Northing, Easting)
• PNEZ (Point, Northing, Easting, Elevation)
• PNED (Point, Northing, Easting, Description)
• PNEZD (Point, Northing, Easting, Elevation, Description)

The software can use survey point data as map data layer. Use this data to generate digital elevation terrain surface and extract HEC-RAS cross sections.

Import River Reach Alignment
The Input | Cross Sections | Import River Reach Alignment command allows the software to import surveyed multiple river reach alignment from a wide variety of file formats. The software will automatically determine where the next river reach starts within the selected file based upon either gaps within the file or a sudden change in direction from one geometry point to the next.

Import Cross Section Geometry
The Input | Cross Sections | Import Cross Section Geometry command allows the software to import multiple surveyed cross section geometry from a wide variety of file formats. The software will automatically determine where the next cross section starts within the selected file based upon either gaps within the file or a sudden change in direction from one geometry point to the next.

Extract High Chord Geometry
The Input | Roadway Crossings | Extract High Chord Geometry command allows the software to utilize AutoCAD Civil 3D surfaces, contours, TINs, DTMs, DEMs, survey points and other external digital elevation terrain data for generating a roadway crossing’s high chord geometry.

Extract Weir Crest Geometry
The Input | Inline Structures | Extract Weir Crest Geometry command allows the software to utilize AutoCAD Civil 3D surfaces, contours, TINs, DTMs, DEMs, survey points and other external digital elevation terrain data for generating weir crest geometry for inline structures. Similarly, this command is available for lateral structures using the Input | Lateral Structures | Extract Weir Crest Geometry command.

Floodplain and Floodway Mapping
Generate floodplain and floodway mapping from HEC RAS results and 3D digital elevation terrain data. Export results directly to AutoCAD (including AutoCAD Civil 3D and Map 3D), Google Earth, ESRI ArcGIS, as well as publish to PDF.

Copying and Pasting Model Elements
The software allows you to copy and paste model elements within a project and even between projects when two or more models are opened. The software will automatically align the copied cross section thalweg with the river reach and orient the cross section perpendicular to the river reach. In addition, the software will update the copied cross section river station ID and adjust the flow lengths for the copied cross section and the next upstream cross section.

Custom Coordinate Reference Systems
GeoHECRAS provides support for custom projected coordinate reference systems. Select File | Map Coordinates from the ribbon menu to view the Map Coordinates backstage page. From the Map Coordinates backstage page, select the Import CRS Projection tab.

Support for ArcInfo File and Personal Geodatabases
GeoHECRAS provides support for GIS ArcInfo GDB File Geodatabases and ArcInfo MDB Personal Geodatabases to be added to map data layers.

Project Auto Recovery
The software automatically saves project while the user is working with the software. Should the software crash, it provides the option to recover the project with no or minimal loss of work.

Color Relief for Elevation Grids
The software can compute a color ramp and generate a corresponding color relief from Elevation Grid Properties dialog box. The generated color relief is saved along with the elevation grid so that will be available with the project file the next time the project is loaded.

Drag and Drop
Opening a GeoHECRAS project file or adding an external GIS data (Shapefiles, AutoCAD files, Elevation Grids, File Geodatabases, etc.) can be done by dragging and dropping the files from Windows Explorer onto the Map View or Map Data Layers panel. Dropping the files on to the Map Data Layers panel provides additional control on the display order of the selected file.