Types of External Data that can be imported

GeoHECRAS can utilize a variety of data:

  • HEC‑RAS Projects (*.prj)
  • AutoCAD and Bentley MicroStation Drawing Files (*.dwg, *.dxf)
  • AutoCAD Civil 3D and Bentley MicroStation Terrain Surfaces (via LandXML)
  • GIS Data (*.shp, *.gdb, *.mdb)
  • 3D Models (via SketchUp)
  • Survey Data
  • Elevation Data
  • Raster Imagery Data

For example, survey data can be used to import river reach alignments, cross section layouts, and more. The user can import a survey of cross sections contained within the river channel, and then have the software automatically extend the cross sections in the overbanks areas extracting geometry data from a terrain surface generated using LiDAR data.

Elevation Data

The following elevation data file formats are supported. This data can be utilized for extracting cross section geometry as well as generating flood maps.

  • ArcInfo ASCII Elevation Grids
  • ArcInfo Binary Elevation Grids
  • ArcInfo Contour Shapefiles
  • ArcInfo Elevation Point Shapefiles
  • ArcInfo GDB File Geodatabases
  • ArcInfo MDB Personal Geodatabases
  • AutoCAD Civil 3D Terrain Surfaces
  • AutoCAD Contours
  • Bentley MicroStation Terrain Surfaces
  • Bentley MicroStation Contours
  • GeoTIFF Elevation Grids
  • LandXML Terrain Models
  • USGS DEM Elevation Grids
  • USGS NED Elevation Grids – BIL Format
  • USGS NED Elevation Grids – Float Format
  • XYZ ASCII Point Terrain Data

GIS Data

The following GIS data file formats are supported:

  • ArcInfo ASCII Elevation Grids
  • ArcInfo Binary Elevation Grids
  • ArcInfo Shapefiles
  • ArcInfo GDB File Geodatabases
  • ArcInfo MDB Personal Geodatabases

Survey Data

The following survey data file formats are supported:

  • ENZ (Easting, Northing, Elevation)
  • NEZ (Northing, Easting, Elevation)
  • PENZ (Point, Easting, Northing, Elevation)
  • PENZD (Point, Easting, Northing, Elevation, Description)
  • PNEZ (Point, Northing, Elevation)
  • PNEZD (Point, Northing, Easting, Elevation, Description)
  • XYZ ASCII Point Data

Raster Imagery Data

The following raster imagery data file formats are supported:

  • Bitmap (*.bmp)
  • ERDAS IMAGINE (*.img)
  • GeoTIFF Georeferenced TIFF (*.tif, *.tiff)
  • Intergraph Enhanced Compression Wavelet (*.ecw)
  • JPEG 2000 (*.jp2, *.j2k, *.jpg2)
  • JPEG (*.jpeg, *.jpg)
  • MrSID (*.sid)
  • Portable Network Graphic (*.png)
  • TIFF Tagged Image File Format (*.tif, *.tiff)

About the Author Chris Maeder

Chris Maeder

Chris is an experienced civil engineering and software technology leader, with over 30 years industry experience. With proven expertise in global software development, he has built engineering teams that adapt quickly, focus on what’s important and, most importantly, deliver. He is a licensed professional civil engineer with extensive experience in water resource engineering. He has performed and supervised engineering projects in urban stormwater drainage, transportation and roadway drainage, storm sewer design, detention pond design, stormwater quality, green infrastructure, watershed management planning, wastewater sewers, water distribution networks, pump stations, FEMA flood studies, bridge and culvert design, bridge scour and armoring, dam failure analysis, seepage and groundwater modeling, and environmental permits.

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