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Geodesy in Action: GNSS and InSAR Reveal Coseismic Deformation in Venezuela

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Introduction On June 24, 2026, north-central Venezuela was struck by two major earthquakes less than one minute apart. Preliminary USGS solutions reported an Mw 7.2 event at 22:04:34 UTC and an Mw 7.5 event at 22:05:11 UTC, followed by an M…

Geodesy Glossary: A Reference Guide to Geodetic Terminology

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A living reference for geodetic terms and abbreviations, linked across IAG website for up-to-date explanations. We are open for updates, corrections, links and contributions from the community.

Geodetic Data: Applying FAIR, TRUST and CARE Principles

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Why should geodesists care about FAIR, TRUST and CARE? This article shows how these principles improve the visibility, reuse, citation, long-term preservation and ethical use of geodetic data.

Global Terrestrial Water Storage Anomaly Dataset Now Operationally Available via Copernicus

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A new global Terrestrial Water Storage Anomaly (TWSA) dataset became operationally available via the Copernicus Climate Data Store in April 2026. Developed through a decade of European GRACE/GRACE-FO collaboration, the dataset provides satellite-based observations of water storage changes across Earth’s surface and subsurface, supporting climate monitoring and future groundwater applications.

Geodesy Cartoon Competition – Winning Cartoons Revealed

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Winners of the Geodesy Cartoon Competition were announced on 5 May 2026 at EGU26 in Vienna during IAG geodesy Reception. With 274 submissions from 119 cartoonists in 46 countries, the initiative highlights how creative visuals make geodesy accessible and strengthen science communication and outreach.

New Website: Discover the Importance of VLBI for Geodesy and Society

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This accessible and visually engaging explainer introduces the fundamentals of Very Long Baseline Interferometry (VLBI) and shows how radio telescopes around the globe measure distances of thousands of kilometres with millimetre precision. It highlights contributions to the International Terrestrial Reference Frame, satellite navigation, and Earth observation, and showcases Australia’s role in global VLBI operations.
VLBI GNSS Onsala Sweden

The Visibility Challenge of Geodesy

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Geodesy quietly underpins our modern world - from GNSS navigation to climate monitoring and digital twins. The new article “The Visibility Challenge of Geodesy” in the GIM International Magazine (Issue 4 2025) explores the global infrastructure behind geodesy and highlights initiatives to make it more visible and accessible to surveyors, geomatics professionals, and the wider geospatial community.

Satellite Laser Ranging – How SLR Powers Geodesy

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Discover Satellite Laser Ranging (SLR) – lasers from ground stations measure satellite and Moon positions with millimeter precision. SLR supports the Terrestrial Reference Frame, tracks Earth rotation, tectonic motion, improves gravity and sea level models, and tests relativity. Explore the science behind these precision measurements in our Geodesy Cartoon.
Geodesy Cartoon

Lost Without Geodesy

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What happens if geodesy disappears? Phones, planes, and warning systems would fail. Our cartoon “Lost Without Geodesy” shows how vital this invisible science is. Geodesy powers GNSS, enabling precise positioning, earthquake monitoring, sea level studies, and more. Without it, GNSS would drift and global systems would collapse.
Geodesy Cartoon

First Geodesy Cartoon Released

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We’re excited to share the first release in our new cartoon series about geodesy: The New Height of Qomolangma (Mt. Everest). This cartoon offers an engaging and educational look at the long-standing debate between China and Nepal over the…