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Thermal conductivity measures the ability of an object to conduct heat. The thermal conductivity map shows the measure of thermal conductivities for the different bedrock types in Ireland. Bedrock is the solid rock at or below the land surface. As there are many bedrock types in Ireland, it is not possible to take a measurement from all of them so the points on the map correspond to the thermal conductivity of the rocks in that specific area.
Geologists record thermal properties of rocks. Thermal conductivity is recorded by measuring the speed at which heat travels through the rock type. This is recorded from a borehole (a deep narrow round hole drilled in the ground) or by measurements on pieces of rock taken out of the ground called drill core.
To create this dataset, existing data was collected from previous projects. The data was combined in an excel spreadsheet.
The data was then digitised and mapped as points of the locations of each borehole measurement. This map was interpreted and thermal conductivity values for the bedrock types were chosen.
This Thermal Conductivity Map is to the scale 1:100,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 1km.
It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).
The thermal conductivity data is shown as points. Each point contains the thermal conductivity values ((Watts per m Kelvin) for the rock type either at a specific depth in the borehole or an average across the whole length of the borehole, a Geothermal Thermal Conductivity Unique ID, a Geothermal ID, Index Number, Borehole Name, Borehole ID, X Easting (ITM), Y Northing (ITM), Top Depth (m), Base Depth (m), Number of Samples, Thermal Conductivity Low (Watts per m Kelvin), Thermal Conductivity High (Watts per m Kelvin), Dry Thermal Conductivity (Watts per m Kelvin), Saturated Thermal Conductivity (Watts per m Kelvin), Standard Deviation, Variance and Data Source.
This dataset may have some limitations as there is a lack of available data. There is also no data from many bedrock types in Ireland.