Radiometric map of the Czech Republic 1 : 500,000 (GEOCR500)
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.
Published by CGS in 1998 as a part of a digital Atlas of maps of the Czech Republic - GEOČR500 (Radiometric map, M. Manová, M. Matolín,1995).
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].