Terrain Elevation Geometry Sources

GeoHECRAS can utilize elevation data for creating and generating:

  • Terrain surfaces
  • Cross sections
  • Roadway crossing high chord geometry
  • Inline structure weir crest geometry
  • Lateral structure weir crest geometry
  • Flood maps

Elevation Grid Data

GeoHECRAS supports most major elevation grid data file formats, such as:

  • ArcInfo ASCII Elevation Grid
  • ArcInfo Binary Elevation Grid
  • ArcInfo Float Grid
  • ENVI BSQ Band Sequential Grid
  • ERDAS ER Mapper Grid
  • ERDAS Imagine Grid
  • GeoTIFF Elevation Grid
  • Intergraph Raster Grid
  • JPEG 2000 Elevation Grid
  • USGS DEM Elevation Grid
  • USGS NED Elevation Grid – BIL Format
  • USGS NED Elevation Grid – Float Format

Other Elevation Data

Other elevation data files can be processed within the software to create an elevation terrain surface. This includes:

  • 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
  • LandXML Formats
  • LIDAR Point Cloud Formats
  • XYZ ASCII Point Terrain Data

Adding Elevation Data

This article discusses how to add elevation data as well as how to construct an elevation terrain surface from online elevation data sources or through a local elevation data file.

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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