GGOS monitors global changes through geodesy
The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) provides the essential framework for accurate measurements and consistent modelling and interpretation of Earth system processes and interactions, including global change, Earth deformation, and mass exchange between and within the geosphere, biosphere, cryosphere, hydrosphere and atmosphere. GGOS provides a framework of geodetic observation infrastructure and expertise to analyze observational data and produce geodetic products that serve science and society.
GGOS Latest News
Turn Your Holiday Creativity into a Geodesy Cartoon!
December 5, 2025/by adminOpen Call for Early Career Researchers – EPOS-GNSS TCS Participation in EPOS Days 2026
November 24, 2025/by adminNew IAG Publications | Geodesist’s Handbook 2024 & IAG Travaux 2023–2025
November 20, 2025/by Martin SehnalIERS | Relaunch of the Website www.iers.org
November 18, 2025/by adminCall for Abstracts – EGU26 Session G2.2 “New Technologies for GGOS”
November 7, 2025/by adminGGOS Days 2025 | Report
November 5, 2025/by adminTIGER Symposium in Geodesy 2026 | Save the date: Sept. 28 – Oct. 1
October 23, 2025/by adminThe Visibility Challenge of Geodesy
October 7, 2025/by adminGGOS Upcoming Events

AGU25 – GGOS Session
15 December - 19 DecemberNew Orleans, USA
Munich 2026 | REFAG Symposium + Unified Analysis Workshop UAW
2 March 2026 - 6 March 2026LDBV – Landesamt für Digitalisierung, Breitband und Vermessung
PhHS-IHRF2026 – Int. Symposium on Physical Height Systems and the IHRF
7 April 2026 - 9 April 2026General Authority for Survey and Geospatial Information (GEOSA)
IAG Geodesy Reception 2026
4 May 2026 - 7 May 2026BEV – Federal Office of Metrology and Surveying
IGS Workshop 2026
1 June 2026 - 5 June 2026InterContinental Hotels SantiagoDon’t miss any News, Events or Jobs!
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IAG as part of the IUGG

IAG Related Organisations
IAG collaborates closely with numerous organizations within geodesy and beyond. See the list for details.
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References
This website is provided by the IAG Secretariat and the GGOS Coordinating Office, which are hosted by the BEV – Federal Office of Metrology and Surveying (Bundesamt für Eich- und Vermessungswesen) in Vienna, Austria.
Website Language Translation
The primary language of this website is English – however, the integrated GTranslate tool enables automatic translation into several languages:
Please note that translations into other languages may not be accurate. For reliable information, refer to the English version of the website.


