Directory

This is the ONS Postcode Directory (ONSPD) for the United Kingdom as at February 2026 in Comma Separated Variable (CSV).  This is a new hosted table so can be accessed via API. The ONSPD relates...

This file contains the names and codes for London Assembly Constituencies in England as at 31st December 2025.  (File size - 16KB)Field Names - LAC25CD, LAC25NMField Types - Text, TextField Lengths - 9, 22

Hourly and minute means of the geomagnetic field vector components from observatories around the world from, respectively, 1883 and 1969, to the present day. At present there are about 160...

The Regional Geochemical Atlases are the principal hard copy product of the British Geological Survey G-BASE (Geochemical Baseline Survey of the Environment) project. The majority of atlases are...

This map layer represents an assessment of the vulnerability of groundwater within the uppermost aquifer. This classification was initially undertaken to support groundwater assessments undertaken...

Tellus Survey 2005-2006 The Tellus geochemical survey began in the summer of 2004 and was completed in 2006. This was a multi-media survey of soil, stream-sediment and stream-water samples in...

This map layer shows the classification of bedrock, as mapped at 1:250 000 scale, into aquifer categories. This classification was initially undertaken to support groundwater assessments...

This map layer shows the distribution of superficial deposits, as mapped at 1:250 000 scale, which are considered to have the potential to store and transmit significant amounts of groundwater....

GSNI GeoIndex Northern Ireland Combined Gravity Surveys This layer shows the station locations for various gravity surveys carried out for GSNI from 1959 to present day.

Tellus Sediments Stream sediments The G-Base samples (1994-1996) were analysed by XRF for Ag, As, Ba, Bi, CaO, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, K2O, La, MnO, Mo, Nb, Ni, P2O5, Pb, Rb, Sb, Se, Sn,...

Tellus Soils For rural soils, samples were collected at an interval of approximately one site per 2 km2 (about one site every 500 acres). Samples were collected from two depths (20 cm and 50 cm)...

Magnetics Tellus Survey 2005 - 2006 Geophysical data were collected in 2005 and 2006 by the Joint Airborne-geoscience Capability (JAC), a joint venture between the Finnish Geological Survey (GTK)...

GeoIndex Historical Surveys This aeromagnetic survey was carried out by Canadian Aeroservices on behalf of the Northern Ireland Government in 1959 as part of a UK wide survey.

Tellus Drainage Sample Locations Tellus Drainage The drainage dataset contains stream waters and stream sediment analysis and are a combination of two surveys. The first, the G-Base survey, was...

Tellus Soil Sample Locations The Tellus geochemical survey began in the summer of 2004 and was completed in 2006. This was a multi-media survey of soil, stream-sediment and stream-water samples in...

Tellus Water Tellus Drainage The drainage dataset contains stream waters and stream sediment analysis and are a combination of two surveys. The first, the G-Base survey, was carried out between...

There are three Mining licences as follows: Mining licences This layer shows the spatial distribution of mining licences currently held by companies in Northern Ireland. Each individual licence is...

Scanned images of the records of all onshore Northern Ireland boreholes, trial pits, shafts and wells held in the Geological Survey of Northern Ireland archives. The records range from simple...

Mineral Occurrences These data constitute the mineral occurrences in Northern Ireland recorded in Geological Survey of Northern Ireland publications. This index will be updated periodically with...

Active Quarries These are quarries and pits in Northern Ireland producing a range of hard rock and aggregate products The data set is based on surveys carried out by GSNI and the data shown comes...