International Service for the Geoid


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ISG - Services

As a IAG Service, ISG has the duty of collecting and distributing geoid models and software for geoid computation, as well as organizing technical schools on geoid determinations.

In the Services website area you can find:

Geoid Repository:
- Grids of local and regional geoid estimates, collected worldwide. The available models can be found
listed in alphabetic order or on an interactive map.

Software download:

- Software for the local geoid estimation
- Software for Spherical Harmonics manipulation
- Software for global models handling
- Software for the evaluation of different functionals of the Gravity Field


- International Schools on geoid computation
- Thematic International Schools