The surveys shown on the map based index (GeoIndex) include; Analogue airborne magnetic surveys of Great Britain for the Geological Survey (GSGB), commercial analogue survey of North Sea by Aeroservices Inc, subsequently digitised by BGS, commercial digital (+ one analogue) surveys off NW/N/NE of Britain by Huntings Geology and Geophysics, purchased outright by BGS and Local surveys, digital and analogue aeromagnetic (+ other methods) surveys for BGS and commercial companies.

This layer of the map based index (GeoIndex) shows the locations of the Mineral Reconnaissance Programme Reports within Great Britain. The Mineral Reconnaissance Programme (MRP), funded by the Department for Trade and Industry (DTI), carried out mineral exploration reconnaissance in Great Britain between 1972 and 1997. The programme provided geological, geochemical, geophysical, mineralogical and metallogenic information on prospective areas in Britain. Work was carried out at various scales, from regional reconnaissance surveys or appraisal, to the drilling of a geochemical or geophysical anomaly. Projects were multidisciplinary, and used a combination of tried and tested methods, together with innovative techniques arising from research and development programmes. By the end of the Programme in 1997, 146 MRP reports had been issued covering localities across the UK. The programme was very successful in that more than half the projects reported attracted significant commercial follow-up resulting in the discovery of many new prospects. The reports themselves are being made available, for free, to downlaod over the next twelve months.

This layer of the Map based index (GeoIndex) shows the location of registered samples of drillcore and washed cuttings from onshore boreholes drilled in UK by BGS, commercial and public bodies, representing almost 10,000 boreholes. There is also a drillcore collection taken from onshore boreholes drilled in England and Wales by the BGS and commercial and public bodies.

This layer of the map based index (GeoIndex) shows the path the survey ship took whilst undertaking the ship gravity, magnetic and bathymetry survey. This index is based on data from approximately 350,000 line kilometres of multi-instrument geophysical survey lines. The data itself includes seismic, sonar, magnetic, gravity, echo sounder, multibeam bathymetry and navigation data, both in digital and analogue format. The data were primarily collected by BGS and the collection also includes additional third party data.

The map shows the location and names of boreholes with digital geophysical logs acquired by the former National Coal Board and British Coal during their exploration for coal in the UK. Ownership of UK coal exploration data was transferred to the Coal Authority (Coal Authority) following privatisation of the UK coal industry. The Coal Authority have appointed the British Geological Survey as custodian of this important national geological data archive. These data are in general publicly available; however, access to data within active mining licences is restricted in that it requires the consent of the mining licensee. The Coal Authority data archive includes digital data for some of the geophysical borehole logging. These are mainly in the form of original field tapes; however, also available are some data transcribed onto more modern media during BGS projects. The BGS will be pleased to provide information on data availability for named boreholes or within specified geographic areas, together with cost estimates and options for supplying copies.

This layer of the GeoIndex shows the availability of 1:25000 scale Classical Areas Geological Maps. The maps themselves show the occurrence, nature and stratigraphic age of rocks. They are available for selected areas of outstanding geological interest in the United Kingdom, and in a number of versions (Solid, or Solid and Drift combined, Bedrock or Superficial). Maps are normally available in both flat and folded format. 1:25000 scale maps are also available for the Channel Islands. To order maps, take note of the map name and use the BGS Internet Shop.

The map sheet: 1. Carte des ressources en sol du Gabon. Scale of 1:2 000 000. Date of publication: 1981.

The map sheet: 1. Bassins du Niger Supérieur et du Bani : croquis géologique : carte 3. Scale of 1:2 000 000. Date of publication: unknown.

The map sheet: 1. Carte de répartition probable de Glossina palpalis et de Glossina fuscipes. Scale of 1:2 000 000. Date of publication: 1957.

The map sheet: 1. Carte des anophèles. Scale of 1:2 000 000. Date of publication: 1955.