A second way of importing HEC-2 data is provided from the geometric data editor. When this method is used, it is assumed that the user has started a new project and therefore all of the HEC-2 data is imported (geometric data, flow data, and plan information). The first way is accomplished through the use of the Import HEC-2 Data option from the File menu on the main HEC-RAS window. HEC-RAS has two ways of importing HEC-2 data. Consequently, thousands of data sets exist in the HEC-2 data format. The HEC-2 program was used for many years to compute steady flow water surface profiles. The HEC-2 program was the predecessor to the HEC-RAS software package. The current version of HEC-RAS has the capability to read this file format, but only cross section data are extracted from the file. The USACE survey format encompasses a wide range of data types. This format is documented in Chapter 6 of Engineering Manual (EM) 05. Army Corps of Engineers (USACE) has developed a standard file format for survey data.
Merge two cross sections hec ras how to#
Chapter 14 of this manual provides detailed discussions on how to import GIS/CADD data into HEC-RAS, as well as how to export computed water surface profiles back to GIS/CADD systems. A detailed description of the file format is contained in Appendix B of this manual. Supported File Formats GIS FormatĪ file format for interfacing HEC-RAS with GIS/CADD systems has been developed at HEC. Multiple data files can be imported into the same geometric data file on a reach-by-reach basis. Data can be imported into an existing HEC-RAS geometry file or for a completely new geometry file. These formats include: a GIS format (developed at HEC) the USACE Standard Surveyor format HEC-2 data format HEC-RAS data format UNET geometric data format and the MIKE11 cross section data format. HEC-RAS has the ability to import geometric data in several different formats.
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