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EolaíochtWater tracing involves tagging water to see where it goes. The time the tracers take to get from one point to the other is also usually recorded. It is most commonly used in karst environments to ascertain groundwater flow rates, directions and catchment definitions (Zone of...
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The Groundwater Subsoil Permeability map classifies how easy water can infiltrate subsoils downwards at any point in the land surface. Permeability across the country is classified as either ‘High’, ‘Moderate’ or ‘Low’. This map is used to determine groundwater vulnerability...
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This Hydrostratigraphic Rock Unit Groups map is a reclassification of the 1:100,000 bedrock geology map, created by grouping bedrock formations and members into 27 Rock Unit Group categories based on their hydrogeological properties and other factors.
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Two Source Protection Areas (SPAs) are delineated. The Inner Protection Area (SI), designed to protect against the effects of human activities that might have an immediate effect on the source and, in particular, against microbial pollution. The Outer Protection Area (SO),...
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Different aquifers have differing abilities to store and transmit water. Based on the hydrogeological characteristics and on the value of the groundwater resource, GSI has classified Ireland’s land surface into aquifer categories. GSI Aquifer classes are divided into three...
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Different aquifers have differing abilities to store and transmit water. Based on the hydrogeological characteristics and on the value of the groundwater resource, GSI has classified Ireland’s land surface into aquifer categories. GSI Aquifer classes are divided into three...
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Groundwater is the water stored below ground in tiny cracks in the rock or in very small spaces between sand grains. It comes from rainwater that soaks into the ground into an aquifer. An aquifer is a body of rock and/or sediment that holds groundwater. The process of rain...
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Karst is a landscape with distinctive landforms that develop on rock types that are readily dissolved by water. In Ireland, karstification mostly occurs in limestone regions. This karst dataset contains mapped karst landforms in Ireland including: boreholes, caves, dry...
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The Quaternary geology of Ireland – Sediments Map is a representation of the surficial geology of Ireland at a scale of 1 to 50,000.
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This dataset is the GSI’s legacy borehole database, compiled over many years from many sources. This dataset is available while we make significant improvements to our borehole holdings.
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The latest merged airborne Uranium data from the Tellus project, managed by the Geological Survey Ireland. The survey was conducted using an from a survey aircraft flying at an altitude of 59 meters. The Uranium data is recorded at 1 Hz map in parts per million along survey...
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Physiographic maps are cartographic representations of the broad-scale physical landscape units of a region, and physiographic units consist of physical regions showing internal uniformity with respect to one or more environmental attributes, which are clearly differentiated...
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The national Groundwater Recharge Map depicts estimated recharge to the deep groundwater system, i.e. groundwater that can be tapped as the sustainable resource. The main hydrogeological controls on groundwater recharge include subsoil permeability, subsoil thickness,...
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The latest merged airborne Potassium data from the Tellus project, managed by the Geological Survey Ireland. The survey was conducted using an from a survey aircraft flying at an altitude of 59 meters. The Potassium data is recorded at 1 Hz map in percentage along survey...
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This dataset contains a complete coverage for all mapped and digitised striae features for the island of Ireland. The Subglacial Striae is part of the Subglacial Landform group. The map forms part of the GSI Quaternary Map series. Data recorded on the maps includes the...
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This data represents a seamless bedrock geological dataset encompassing Rep of Ireland and parts of Northern Ireland at the 500,000 scale. This dataset is part of the ‘Bedrock Geology 500K Series’ (seamless bedrock geological dataset encompassing Rep of Ireland and parts of...
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This dataset contains bedrock units created by grouping bedrock formations and members based on their hydrogeological properties and other factors.
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EolaíochtBedrock outcrop polygons have been derived from digitising outcrop locations from scanned 19th Century GSI field maps. The data was derived from mapping at a scale of 1:10,560 (6 inches to one mile). Individual map sheets were geo-referenced to an index polygon and checked...
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Physiographic maps are cartographic representations of the broad-scale physical landscape units of a region, and physiographic units consist of physical regions showing internal uniformity with respect to one or more environmental attributes, which are clearly differentiated...
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This data represents the latest version of the bedrock geological dataset for the Rep of Ireland at the 1:100,000 scale digital geological map series. The dataset comprises 4 key feature-classes. 1) Bedrock Rock Units 1:100k - A polygon shapefile that contains bedrock...