Radon database

Since 1992 the soil gas radon measurements within the state territory are performed using the uniform method.. The data are not evenly distributed within the state territory , however they cover all major geological and lithological units, so that they can be used for statistical evaluation of  radon risk of the geological units. Up to now, 7300 soil gas radon measurements (each 15 sampling points) were gathered from the whole state territory. The data are yielded free of charge by companies covering by measurements nearly the whole area of republic and are loaded into the predefined database structure (in FoxPro or other compatible programmes), which contains:

• GIS localization: XY digitised coordinates, number of map sheet 1:50,000, locality
• Radon data: number of sampling points, mean, min, max, std, median, 75% quantile
• U data: field gammaspectrometry, if measured at the site
• Rn classification: radon risk category, distribution of radon risk categories in case of larger areas
• Permeability data: category of permeability
• Geology: codes of the rock type and soil cover, anthropogeneous influence, presence of tectonics
• Source of data: company, date of measurements, method of sampling, device

The database serves both for the statistical evaluation of radon risk in the rock types and as an input to GIS based maps.