Databases

 National Landslides Database.

National Geotechnical Borehole Database.

GSI holds the National Geotechnical Borehole Database. This database contains the reports of site investigation work undertaken to determine the ground conditions at the location of proposed development projects. The reports typically contain a text report and borehole, trial pit and probe logs, as well as field tests and laboratory sample analyses. The data is also very important for the modelling of the subsurface geology and in geological mapping of the overburden (Quaternary sediments) and the bedrock. The investigations are very expensive to undertake and should not be lost for posterity, and GSI provides a national repository for these reports.

Database Size

The database has been assembled over several decades and has expanded rapidly in recent years with the rapid expansion of the Irish economy. The reports cover projects in both the private and public sectors, particularly infrastructure projects. The GSI as yet has no statutory right to acquire these reports but depends on the good will of consulting engineers, site investigation companies, local authorities and other agencies in submitting reports for inclusion in the national database. The database is currently in both hard copy (databank) and digital format in an Oracle database. The majority of investigations are located in the main cities and towns where most development occurs. In addition there are reports on investigations in rural areas for national road and gas pipeline construction, and other linear projects such as water/sewerage pipelines.

In July 2013 the total databank had 7536 Reports containing 82640 individual investigations (boreholes, trial pits, probes). Of these, 5377 Reports containing 47539 investigations have been input to the Oracle database. Of the total of 7536 reports, 5060 reports have been fully scanned as .tiff or .pdf files. At this time also a total of 2913 reports containing 27763 boreholes, trial pits and probes have been georeferenced, their locations digitised on digital base maps for the main cities in Ireland – Dublin, Cork, Waterford, Limerick and Galway – as well as many provincial areas. Depth to bedrock contour maps, Rockhead OD maps, and 3-D models of the bedrock topography have been generated for the main cities. These maps are periodically upgraded as new data is added to the database. The newest version is from 2013.

TopographyRockheadDepth to Bedrock
 

Database Access

The database is used extensively by consulting engineers as part of the desk study stage in site selection and the planning of ground investigation design. Viewing of site investigation reports is by appointment with John Butler (+ 353 1 6782785) john.butler@gsi.ie. Data can also be delivered in a variety of digital formats depending on the status of the report(s) in question. All data held in digital format is free of charge.


Geotechnical Map Viewer
Digitised Boreholes/Trial Pits – Database on the Web

Go to Viewer
Geotechnical Map Viewer 

This new Geotechnical Map Viewer launched in September 2012 was developed with ISD from DCENR. A big improvement in the new viewer is that customers can query the whole National Geotechnical Borehole database on screen and have access to any report that is in the database whether or not it has being fully inputted and digitised, or just inputted or just added to the database.

In the case of the digitised reports customers can see the polygons and investigations, and then drill down to view logs and test results (when available). These can then be saved to a pdf file or extract as ESRI, CAD or Bentley Microstation design file type.The viewer will be updated automatically as more reports will be added and/or more data will be inputted and digitised.

For reports that are not digitised customers are still able to drill down to view logs and test results (when available) and save the report as a pdf file.The ultimate aim of this web map viewer is to provide public and professional users with access to detailed information on geotechnical site reports, borehole/trial pit investigations and test results via an easy to use map-centric interface. Users will be able to navigate a map, either manually or using a simple gazetteer, to view a map of the place of interest. Superimposed on this map will be polygons indicating sites where investigations were carried out, and points indicating the location of borehole and trial pits. Users will be able to use these points and polygons to learn more about previous geological investigations carried out in the area of interest.

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