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GGOS Strategic Plan 2024 – 2034: Geodesy for Science and Society

GGOS, the Global Geodetic Observing System of the International Association of Geodesy (IAG), was established as an integrating framework for all IAG Components (Services, Commissions, Inter-Commission Committees and Projects) to move from the provision of individual geodetic technique-based products to a level of consistent modelling and interpretation of Earth System processes and interactions, ensuring an integrated, consistent and long-term observing system.

2024-01-28

From the GGOS Focus Area Unified Hight System to the Coordination Centre for the International Height Reference Frame IHRF

One initial objective of the Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) was the standardisation of height systems worldwide. In this way, the GGOS Focus Area Unified Height System (GGOS-FA-UHS) was established in 2010 to lead and coordinate the efforts needed towards the establishment of a global standard for the precise determination of physical heights.

2024-01-28

GGOS Call for Nominations

GGOS is seeking nominations for the position of Director of the GGOS Bureau of Networks and Observations (GGOS-BNO).

2023-12-21

Gravity, Geoid and Height Systems 2024

The GGHS2024 “Gravity, Geoid and Height Systems 2024” Symposium will be held in Thessaloniki, Greece, from 4 to 6 September 2024. It focuses on methods for observing, estimating and interpreting the Earth’s gravity field and the essential role of gravity field modelling in measuring, understanding and predicting changes in the Earth system.

2023-10-19

20th International Symposium on Geodynamics and Earth Tides

We are pleased to announce that the 20th International Symposium on Geodynamics and Earth Tides (G-ETS) will take place in Strasbourg (France) from August 25 to August 30, 2024. The G-ETS 2024 will be held under the umbrella of the IAG (International Association of Geodesy) and, in particular, through the IAG Sub-Commission 3.1 (Earth Tides and Geodynamics) and International Geodynamics and Earth Tide Service.

2023-10-06

IAG Events

    Next events
  • 2024-04-14 - 2024-04-19
    Add to Calendar 20240414 00:00 20240419 00:00 EGU General Assembly 2024 Vienna
  • 2024-04-15 - 2024-04-18
    Add to Calendar 20240415 00:00 20240418 00:00 ION Pacific PNT Conference Honolulu, Hawaii
  • 2024-05-19 - 2024-05-24
    Add to Calendar 20240519 00:00 20240524 00:00 FIG Working Week Accra
  • 2024-06-05 - 2024-06-07
    Add to Calendar 20240605 00:00 20240607 00:00 EUREF Symposium 2024 Barcelona
  • 2024-06-23 - 2024-06-28
    Add to Calendar 20240623 00:00 20240628 00:00 18th Symposium of SEDI Great Barrington, MA
  • 2024-07-13 - 2024-07-21
    Add to Calendar 20240713 00:00 20240721 00:00 45th COSPAR Scientific Assembly Busan
  • 2024-08-06 - 2024-08-15
    Add to Calendar 20240806 00:00 20240815 00:00 32th IAU General Assembly Cape Town

Welcome to the International Association of Geodesy

The International Association of Geodesy (IAG) is a scientific association in the field of geodesy. It promotes scientific cooperation and research in geodesy on a global scale and contributes to it through its various research bodies. It is a constituent association of the International Union of Geodesy and Geophysics (IUGG). IAG has a long and distinguished history that goes back to 1862, the year, in which the "Mitteleuropäische Gradmessung" was established. This organization was formed to promote scientific work in geodesy in Central Europe, following a proposal made a year earlier by J.J. Baeyer (1861). In 1867, the name of the organization was changed to "Europäische Gradmessung", because by then countries from all of Europe had joined the organization. In 1886, the name was changed to "Internationale Erdmessung", emphasizing the need for international cooperation to solve the scientific tasks of geodesy. The French and English translations of this name resulted in the current name "International Association of Geodesy (IAG)". Thus, the IAG as an international scientific organization goes back to 1886 and is one of the oldest international associations of this kind.

The Mission of the Association is the advancement of geodesy. IAG implements its mission by furthering geodetic theory through research and teaching, by collecting, analyzing, modelling and interpreting observational data, by stimulating technological development and by providing a consistent representation of the figure, rotation and gravity field of the Earth and planets, as well as their temporal variations.