Import National Elevation Dataset

This command creates a grid or triangulation surface file (GRD or TIN) using the National Elevation Dataset (NED) from the USGS. Before running this command, the grid coordinate system must be setup in Settings > Drawing Setup. The program first prompts to pick a window in the drawing for the surface area. Then there is a dialog to set the number of sample points. Currently the NED service is slow. So the number of samples is limited to 50 in X and Y directions.

Prompts

Pick first corner of bounding box: Identify one corner of a drawing window for the surface area
Pick second corner of bounding box: Identify the opposite corner
Options dialog
Surface File To Write

Pulldown Menu Location: Civil > Surface > Import/Export Surface, Survey > Surface > Import/Export Surface, Construction > Import/Export
Keyboard Command: getneddata
Prerequisite: Coordinate projection system, Internet connection