A base map layer provides high-quality background aerial and other imagery from different online map providers to add context to...

This video details how to add and georeference an AutoCAD drawing file for a HEC‑RAS model. There are two ways of...

GeoHECRAS allows the user to easily review and edit GIS attribute data using the Attribute Table command. The Attribute Table...

The software can display the FEMA digital Flood Insurance Rate Map (FIRM) directly on the Map View. It is required...

GeoHECRAS allows the user to download FEMA National Flood Hazard Layer (NFHL) as shapefile data by using the FEMA Flood...

The Generate Contours command creates equally spaced contour lines from loaded elevation grid data. The user can specify major and...

Digital terrain surfaces can be used for the following tasks: Extracting cross section geometry Computing 2D flow areas Determining bank...

The software allows the user to change the display properties of the following HEC‑RAS elements shown on the Map View: River...

This video details how to add a GIS shapefile for a HEC‑RAS model. Follow these steps to add a GIS shapefile to a...

A triangulated irregular network (TIN) is a digital data structure used to representation of a terrain surface. A TIN is a...

The order of layers listed in the Map Data Layers panel determines how layers are drawn on a map. The...

The Merge DEMs command is used to merge together multiple elevation grids (sometimes called rasters, DEMs or Digital Elevation Models)...

The Process LIDAR command provides numerous advanced LIDAR processing tools, including point cloud classification filtering, extraction of buildings and other...

The software allows the user to reload a layer by right-clicking on the layer and selecting the Reload Layer command....

The Rivers & Streams command displays the National Hydrograph Dataset (NHD) from the USGS web map service, showing river and...

GeoHECRAS can utilize elevation data for creating and generating: Terrain surfaces Cross sections Roadway crossing high chord geometry Inline structure...

GeoHECRAS can utilize a variety of data: HEC‑RAS Projects (*.prj) AutoCAD and Bentley MicroStation Drawing Files (*.dwg, *.dxf) AutoCAD Civil 3D...

The GeoHECRAS user interface has several features that will be examined in detail in the following sections. The user interface...

The USGS StreamStats command allows the user to click on a stream location in the Map View, and the software...

GIS software uses two basic types of data: Spatial Data — containing the coordinates and identifying information describing the map itself...

The Watershed Boundaries command displays the Watershed Boundary Dataset (WBD) from the USGS web map service, which shows the watershed...

The Zoom To command enables the user to search and zoom to a specific location or address on the Map...