HEC-RAS to TUFLOW

Introduction

This page contains a brief introduction to the methods of converting HEC-RAS model inputs into a format which compatible with TUFLOW. If you have any suggestions to be included in these pages, please email support@tuflow.com.

Model Geometry Conversion

The sdf_to_GIS.exe utility converts HEC-RAS geometric data data into TUFLOW compatible GIS and csv input format. The utility outputs include:

1. Centerline location data in GIS format
2. Cross-section locations in GIS format
3. Cross-section data in csv format

The GIS format type can be either *mif or *shp. Options are also available to automatically trim the processed cross-section GIS and csv data to the main channel region between defined levee markers. The HEC-RAS model inputs need to be in SDF format (HEC-RAS export format), and must be geo-referenced using a real world projection.

Utility Description

The utility requires GIS projection information to correctly translate the spatial dataset from SDF format to *mif or *.shp format. This is done by including either a projection or header file in the same folder directory as the SDF file. The utility will use the projection information from this file for the data conversion.

1. mif output: Projection.mif or Header.mif
2. shp output: Projection.prf or Header.prj

Example Syntax (*.mif output)

Description: Convert HEC-RAS sdf data to mif format, trimming cross-section at levee markers (default trim option):

sdf_to_gis.exe -mif hecras_example.sdf

Description: Convert HEC-RAS sdf data to mif format, not trimming cross-section at levee markers:

sdf_to_gis.exe -mif -notrim hecras_example.sdf

Example Syntax (*.shp output)

Description: Convert HEC-RAS sdf data to shp format, trimming cross-section at levee markers (default trim option):

sdf_to_gis.exe -shp hecras_example.sdf

Description: Convert HEC-RAS sdf data to shp format, not trimming cross-section at levee markers:

sdf_to_gis.exe -shp -notrim hecras_example.sdf