Insert or edit a geoid model.
Manage / Configuration / Coordinate Systems / Geoid Models / 
or 
.
| Control | Description |
|---|---|
| Name | Type the geoid model name. |
| File Name | Click in the box then click  to select a geoid model file. |
| Coordinate Type | Displays the type of coordinates in the geoid model file. |
- Geoid model files supported include AusGeoid98/09 files (*.dat, *.txt), Canadian files (*.byn), EMG96 (World) files (*.GRD), Geoid 99/03 files (*.bin), OSGM02 files (*.txt), Leica GEM files (*.GEM) and AusGeoid09/2020 (*.gsb).
- Configure the projects coordinate system to use the geoid model referenced in the data file.
- When navigating to the geoid model file in the Open window, use the file type list to show supported file types.
- When a data file that specifies a geoid model is imported, you will be prompted for the location of the geoid model if it cannot be found in the specified folder or previously used geoid model folders.
- The default geoid undulation is used when the geoid model referenced in the data file is not found and a matching geoid model is not specified in the project coordinate system.
- For best results use a NTv2 binary grid (.gsb) geoid model.
