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
TIGER Symposium in Geodesy 2026 – Extension of abstract and travel support deadline
April 15, 2026/by adminInternational Geological Congress IGC 2028 – First Circular
April 8, 2026/by adminTIGER Symposium in Geodesy 2026 – Abstract deadline approaching
April 1, 2026/by adminSummer School: Satellite-Based Hydrological Data Assimilation
March 19, 2026/by adminNew Website: Discover the Importance of VLBI for Geodesy and Society
February 24, 2026/by adminIAG News – New Ways to Stay Connected
February 16, 2026/by Martin SehnalLast Call: Join the Geodesy Cartoon Competition Before March 22!
February 12, 2026/by adminTIGER Symposium in Geodesy 2026 – Abstract submission and registration open
February 4, 2026/by adminGGOS Upcoming Events

IAG Geodesy Reception 2026
5 May | 19:00 - 21:45 CEST BEV – Federal Office of Metrology and Surveying
IGS Workshop 2026
1 June - 5 JuneInterContinental Hotels Santiago
12 Spanish-Portuguese Assembly of Geodesy & Geophysics
16 June - 19 JuneETSI Topografía, Geodesia y Cartografía
Summer School: satellite-based hydrological data assimilation
25 August - 28 AugustGeodesy group, Aalborg University
GGOS Topical Meeting on Geohazards
2 October | 08:00 - 15:00 CEST LantmäterietDon’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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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.
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