This database contains depictions of areas explored for radioactive minerals by the former Czechoslovak Uranium Industry. The areas are indicated separately according to the following survey methods: surface or vehicle-born gamma survey, emanometry in test pits up to 1 m deep, combined emanometry and gamma survey in test pits up to 1 m deep, and combined emanometry and gamma survey in test pits 1-15 m deep.

This database contains data from radiometric survey. Radiometry means the measurement of the total gamma-ray activity of natural radioactive isotopes on the Earth’s surface, in the past the total exposure rate was measured. The first stage (measurement of exposure rate) was carried out in 1957-1973 using Geiger-Mueller counter; this survey covered the whole territory of the Czech Republic, measured data is stored in [µR/h]. Next stage started in 1976 when total gamma-ray activity was registered simultaneously with gamma-ray spectrometry survey and covers about 60 % of the territory, measured data was stored as total gamma-ray activity [Ur].

CGS map server application allows statistical data of radon hazard for Czech's administrative units. Data was processed by CGS and State Office for Nuclear Safety under the Czech Republic Radon Program. Application operates with the Geological map 1 : 50,000 and 1 : 500,000. It's possible to generate komplex radon information in PDF format for municipality centroids.

WMS service displays the Radiometric field map of the Czech Republic 1:500,000 (M. Manová, M. Matolín, 1995). This map was published by the Czech Geological Survey in the Atlas of map of the Czech Republic (GEOCR500) in 1998. Data on the gamma dose rate of rocks are based on regional and detailed airborne measurement of terrestrial radiation. The data of the map illustrate the regional distribution of natural radionuclides in rocks in the Czech Republic.

In the database of the "Radon Risk Association“ the measurements of radon in bedrock from the whole area of the Czech Republic are stored. Maps of radon index at a scale of 1:50,000 have been compiled using statistical procedures to process the measurements so that the areas defined by the vectorized boundaries of the geological units can be classified using colours to indicate the prevailing radon index for bedrock and quaternary sediments (low, medium, high index).

INSPIRE Download Service (ATOM feed) provides access to the results of the mapping of radon index map in the Czech Republic at a scale of 1:50,000.

Radiometric map of the Czech Republic (M. Manová, M. Matolín,1995) describes the natural radioactivity of the rocks on the Earth's surface. The radioactivity field is expressed in a batch a dose rate of gamma radiation of rocks 1 m above the Earth's surface. Map data defines the regions of low and high radioactivity.

Radon index map of the Czech Republic 1 : 50,000 has been compiled using statistical procedures to process the measurements so that the areas defined by the vectorized boundaries of the geological units can be classified to indicate the prevailing radon index for bedrock and quaternary sediments (low, medium, high index). The source data has been adjusted to meet the INSPIRE requirements for download service.