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Tellus is a ground and airborne geoscience mapping programme, collecting chemical and geophysical data that will inform the management of Ireland’s environment and natural resources.

Tellus is undertaken by the Geological Survey of Ireland and is funded by the Department of Communications, Climate Action and the Environment. All data from Tellus are 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. Surveying activities for 2017 consist of airborne surveys in Co Mayo and Co Donegal, and a geochemical survey in the central west of the Midlands of Ireland.  Both surveys will be commencing in early spring and will finish in autumn 2017.

To date, Tellus surveying has been completed in Northern Ireland (2004–2008), the border region of Ireland (2011–2013), the north midlands region of Ireland (2014–2015) and most recently the eastern midlands region (2015). Longer term, Tellus aims to complete surveying the entire island of Ireland on a phased basis, completing 50% by end 2017.


The aircraft and ground teams will be operating from spring till autumn 2017.

View our airborne flyers for Co Donegal, Co Mayo and ground survey of the Central Midlands

Tellus ground survey…

Ground survey sample teams teams have now completed the peri-urban areas of Dublin and Galway.

 From mid-April until late autumn the teams will be working across counties Galway, Roscommon and neighbouring parts of Offaly, Westmeath and Longford.

Where the plane is flying…

Airborne survey of Co Mayo and Co Donegal is now underway.  The flight plan for this week, 24th April – 2nd May, is displayed in the flight lines viewer below.

Legend: Red Flight Line This week’s flight lines Blue Flight Line Flight lines completed

Having trouble viewing the flight lines? Open ARCGIS Viewer link in a new browser window.

Latest News from Tellus

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