How can I test if my geoid file is working fine without the need to go to the survey location?
To test if a geoid model works as expected (which is recommended before starting your survey), please follow the steps below:
- Make sure that the geoid file is correctly installed or downloaded. For more information, please refer to the geoid files manual page: https://www.eye4software.com/hydromagic/documentation/manual/configuration/geodesy-configuration/manage-geoids/;
- Open or create a project with the same coordinate system as you are going to use the geoid model on;
- In the top menu, go to “Tools” => “Geodesy Calculations” => “Geoid Calculator…” to start the “Geoid Calculator” tool.
- Click the “Select…” button and select the geoid model you want to test from the list. When a geoid model is displayed in red, it is not yet installed or downloaded, please see step #1 in this case.
- Enter either the easting and northing or latitude and longitude coordinates of the project location, depending on the setting of the “Use projected coordinates” check box.
- Click the ”Calculate” button to calculate the separation value for the selected coordinate. This is the elevation difference between the ellipsoid and the local vertical datum.
![Download geoid model](/hydromagic/documentation/manual/recording-data/rtk-tide-corrections/images_small/select_geoid_model.png)
When not installed, select the "Download and Install" option.