IAG website
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Welcome to the New IAG Website

We are excited to announce the official launch of the new IAG website geodesy.science. This launch marks a major milestone for the IAG and reflects our ambition to make geodesy more visible, accessible, and connected — both within the scientific…
ESA atomic clock satellite
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A new atomic clock in space could help us measure elevations on Earth

What if we could measure height differences on Earth to the centimeter from space? ESA’s ACES mission on the ISS links ultra-precise atomic clocks in orbit with those on Earth — enabling more accurate global elevation data. This could transform geodesy and help refine height reference systems worldwide.
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Virtual School of Geodesy – Reference Frames, Geodynamics, Atmosphere

Are you passionate about geodesy, climate change, and the global systems that help us understand our planet? Don’t miss this unique opportunity to dive deep into one of the most relevant scientific topics of our time! This international online…
Geoid School Kazakhstan 2025
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International Geoid School in Kazakhstan

The 15th International School on “The Determination and Use of the Geoid” will be organized in Almaty, Kazakhstan between April 7-11, 2025 Information Location: Kazakhstan - Almaty Event date: 2025-04-07 - 2025-04-11 Event's site From…
EUREF Reference Frame IAG© EUREF
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EUREF Symposia 2025

We are pleased to announce that the EUREF Symposia 2025 is scheduled for Wednesday-Thursday June 25-26, with a full day Analysis Workshop on Tuesday June 24. The location is Covilhã, Portugal, and the venue will be the campus of the University…
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Announcement of 3rd IAG Commission 4 Symposium

The 3rd International Symposium of IAG Commission 4: Positioning and Applications will take place from 13 to 15 May 2025 in Wuhan, China.
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New Video: Discover the Importance of Terrestrial Reference Frames

The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) has released an enlightening 2 minute video showing the critical role of geodetic terrestrial reference frames in our world. This short film illustrates…
Freepic
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International Height Reference Frame IHRF – Coordination Centre

From the GGOS Focus Area Unified Height System to the IHRF Coordination Centre One initial objective of the Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) was the standardisation of height systems worldwide.…
GGHS 2024 Symposium
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Symposium on Gravity, Geoid and Height Systems – GGHS2024

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…
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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.