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How does HEC georas work with HEC-RAS?
HEC-GeoRAS is a set of procedures, tools, and utilities for processing geospatial data in ArcGIS using a graphical user interface (GUI). The interface allows the preparation of geometric data for import into HEC-RAS and processes simulation results exported from HEC-RAS.
Can a DTM be imported into HEC-RAS?
The interface allows the preparation of geometric data for import into HEC-RAS and processes simulation results exported from HEC-RAS. To create the import file, the user must have an existing digital terrain model (DTM) of the river system in the ArcInfo TIN format.
Do you need ArcGIS to install HEC-georas?
ArcGIS 9.3 (ArcView license) with the 3D Analyst and Spatial Analyst extensions are required. This package will install HEC-GeoRAS 4.2.92 and all its pre-requisites automatically. ArcGIS 9.2 (ArcView license) with the 3D Analyst and Spatial Analyst extensions are required.
How to convert dem raster file to ASCII format?
I have a DEM raster file in .tif format. I need to convert it to ASCII format. I used conversion tool in ArcGIS from raster to ASCII, but the result is in .txt instead of .asc. What should I do? Know someone who can answer?
How to create flood hazard maps using HEC-RAS?
=> Select the tool (Add Features). Start digitizing the river centerline from upstream to downstream until the end of Baxter River. Click in the direction of flow. => Double click when done. => Start digitizing the river centerline from its upstream end towards the junction with the Baxter River.
Where is the geometry data stored in HEC-RAS?
This is stored in a dedicated geometry file (.g0*). To create all necessary geometric data for HEC-RAS geometry file, before version 5.0.4, it was necessary to perform pre-processing of available data using HEC-GeoRAS plugin in ArcGIS. These elements are now created in the RAS Mapper component of HEC-RAS.
Do you need ArcGIS for HEC-RAS 5.0.4?
With the introduction of HEC-RAS 5.0.4, there is no need for using ArcGIS and HEC-GeoRAS, therefore the steps in this tutorial are significantly different. However, we are using the same data, transformed into meters. IMPORTANT! In this tutorial, functionalities that have only been added to HEC-RAS in version 5.0.4 are used.