IAG website

Welcome to the New IAG Website

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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

A new atomic clock in space could help us measure elevations on Earth

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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.

Virtual School of Geodesy – Reference Frames, Geodynamics, Atmosphere

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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…
EUREF Reference Frame IAG© EUREF

EUREF Symposia 2025

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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…

New Video: Discover the Importance of Terrestrial Reference Frames

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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…

Call for Papers

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IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG 2022), Thessaloniki, Greece, October 17-20, 2022
Abstract Deadline: July 20, 2022!

1st Circular of the SIRGAS Symposium 2022

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1st Circular of the SIRGAS Symposium 2022 The next SIRGAS Symposium will be held in the city of Santiago de Chile, November 7-9, 2022, thanks to the invitation offered by the Instituto Geográfico Militar (IGM) of Chile, in celebration of its…
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REFAG 2022 – Symposium on Reference Frames for Applications in Geoscience

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The REFAG 2022 carries on the tradition of previous IAG dedicated symposia on Reference Frames, aiming to bring together leading experts from academia, public authorities and private sector with young scientists and students, to discuss current achievements and future prospects of geodetic reference frames and their scientific and societal impact. Don't miss to participate in this great symposium.

REFAG 2022 – Call for papers

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IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG 2022), Thessaloniki, Greece, October 17-20, 2022