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You are here: Home1 / IAG GGOS2 / Services

IAG Services


The IAG Services generates products, by collecting and analyzing their own observations and/or observations of other services, relevant for geodesy and for other sciences and applications. Accuracy and robustness of products, quality control, timeliness, and state of the art quality are the essential aspects of the Services. The IAG’s Global Geodetic Observing System (GGOS) works together with the IAG Services to facilitate the production of geodetic products (including the geometric reference frames and the gravity field models) that are fundamental to science and society.

The following Services are “Level-1” IAG-Services they are classified in “Geometric & General Services” and “Gravity Services”. The so-called “Gravity Services” are all coordinated by the IGFS (International Gravity Field Service). In addition to these “Level-1” IAG-Services the IGFS coordinates the IGFS Product Center COST-G.

Geometric & General Services

IERS – Int. Earth Rotation and Reference Systems Service

IGS – International GNSS Service

ILRS – International Laser Ranging Service

IVS – International VLBI Service for Geodesy and Astrometry

IDS – International Doris Service

PSMSL – Permanent Service for Mean Sea Level

Gravity Services

IGFS – International Gravity Field Service

ICGEM – International Centre for Global Earth Models

IDEMS – International Digital Elevation Model Service

IGETS – International Geodynamics and Earth Tide Service

ISG – International Service for the Geoid

BGI – International Gravimetric Bureau

In addition to these Gravity Services, the IGFS coordinates the following Centers:

IHRF CC – Int. Height Reference Frame Coordination Center

COST-G – Int. Combination Service for Time-variable Gravity Fields

Latest News – IAG Services

Geodetic Data: Applying FAIR, TRUST and CARE Principles

May 20, 2026/by admin

TIGER Symposium in Geodesy 2026 – Extension of abstract and travel support deadline

April 15, 2026/by admin

International Geological Congress IGC 2028 – First Circular

April 8, 2026/by admin

TIGER Symposium in Geodesy 2026 – Abstract deadline approaching

April 1, 2026/by admin
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Upcoming Events – IAG Services

IGS Workshop 2026

1 June - 5 JuneInterContinental Hotels Santiago

Geodesy Day – International Webinar on Geodesy

3 June | 11:00 - 12:30 PKT

Colloquium for Prof. Torge and Prof Seeber

9 June | 16:00 - 17:30 CEST Leibniz University Hannover, Geodetic Institute, Room A104

IDS Workshop 2026

23 June - 25 JuneRheinMain CongressCenter

Summer School: satellite-based hydrological data assimilation

25 August - 28 August
Geodesy group, Aalborg University
view all events

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IAG SERVICES

Geometric & General Services

  • IERS iag service earth rotation reference system frame© IERS
    IERS – Int. Earth Rotation and Reference Systems Service
  • IGS iag service gnss global navigation satellite system© IGS
    IGS – International GNSS Service
  • ILRS laser ranging service iag© ILRS
    ILRS – International Laser Ranging Service
  • IVS VLBI Service IAG© IVS
    IVS – International VLBI Service for Geodesy and Astrometry
  • IDS iag service DORIS© IDS
    IDS – International Doris Service
  • PSMSL Permanent Service for Mean Sea Level IAG© PSMSL
    PSMSL – Permanent Service for Mean Sea Level

Gravity Services

  • IGFS iag service gravity field© IGFS
    IGFS – International Gravity Field Service
  • ICGEM iag service© ICGEM
    ICGEM – International Centre for Global Earth Models
  • IDEMS iag service DEM digital elevation model© IDEMS
    IDEMS – International Digital Elevation Model Service
  • IGETS iag service© IGETS
    IGETS – International Geodynamics and Earth Tide Service
  • ISG service geoid IAG© ISG
    ISG – International Service for the Geoid
  • BGI gravimetric service IAG© BGI
    BGI – International Gravimetric Bureau

IAG as part of the IUGG

  
The International Association of Geodesy (IAG)  is a constituent association of the International Union of Geodesy and Geophysics (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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Please note that translations into other languages may not be accurate. For reliable information, refer to the English version of the website.

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