​​​​​​​​​​​​​​​​​​​​​​​​​The Tellus survey is a national programme to gather geochemical and geophysical data across Ireland – in other words, to examine the chemical and physical properties of our soil, rocks and water.

Tellus is undertaken by Geological Survey Ireland and is funded by the Department of Communications, Climate Action and Environment. All data from Tellus is made available free of charge online.

Tellus involves two types of surveying – airborne geophysical surveying using a low-flying aircraft and ground-based geochemical surveying of soil, stream water and stream sediment.

To date, Tellus surveying has been completed in Northern Ireland (2004–2008) and the border region of Ireland (2011–2013). Tellus airborne surveying has been completed in the north midlands region of Ireland (2014–2015), the eastern midlands region (2015), the west of Ireland (2016–2017) and most recenetly in Limerick, north Tipperary and west Cork (2018–​2019). The Tellus airborne geophysical survey has now mapped 60% of the country.

From late June until late autumn 2019, the Tellus aircraft will move to the south east of Ireland; into counties Carlow, Wexford, Wicklow and neighbouring parts of south Kildare, south east Kilkenny and Waterford.
The Tellus ground survey will commence fieldwork in late July 2019. The fieldwork will involve soil sample collection in predominantly rural areas across the north midlands region of Ireland. The work is to be carried out by end September 2019.

Tellus has established a Product Development workstream in order to produce more focused, user-centric data products, the need for which has been identified through stakeholder consultation, independent reviews of Tellus and government policy.   Product development is undertaken under five main themes: mineral pro​spe​ctivity, smart agriculture, environment and health, climate action and education.

Find out more about our ground and airborne field operations and view our data products.

The ​Tellus survey aircraft  has moved into south east Ireland and will fly in this region from June, until late autumn 2019.

View our airborne survey FAQs here.

​​​​​​​​​​​​​​​​​​​The Tellus Geochemistry programme will commence fieldwork in late July 2019. The fieldwork will involve soil sample collection in predominantly rural areas across the north midlands region of Ireland. The work is to be carried out by end September 2019.

 View our ground survey FAQs here.

Check out our Tellus geochemistry instructional video series here.

Tellus collects geochemical and geophysical data that will inform the management of Ireland’s environment and natural resources.

Tellus undertakes research with a range of collaborators in order to maximise the societal and economic benefits of the geochemical and geophysical data. Explore the themes to see how Tellus​ data is being used to benefit society. Survey Ireland to feature on Big Week on the FarmGeological Survey Ireland's Tellus team will feature on RTÉ One's Big Week on the Farm which airs September 4.28/08/2019 23:00:00 Airborne Survey sets off over South East IrelandThe next phase of the Tellus Survey – a nationwide programme of the Geological Survey Ireland, which collects geochemical and geophysical data on rocks, soil and water across Ireland – has officially taken off over the south east of Ireland. To gather this data, a low-flying plane equipped with state-of the-art instruments will soar over the skies 04/06/2019 23:00:00 City Geo-Environmental Challenges as addressed by Geological Survey Ireland10/07/2019 23:00:00 new digital database of Ireland's electromagnetic fields to mitigate against space weather24/06/2019 23:00:00