Import NASA World Elevation Dataset

This command creates a grid surface file (.GRD) using a world elevation dataset from the NASA Space Shuttle program. The data covers all land areas up to latitude 60. The data is at an interval of 1 arc-second or about 100 feet.

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. The first time that you access data in an area, the program will download source data from the Carlson Software server.

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
Surface File To Write

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