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.

This database contains information on geophysical measurements made mainly by Geofyzika state enterprise, Brno and its successor organizations since the early 1950s. Areas covered by regional surveys are depicted on 1 : 200.000 scale maps and local small-scale measurements at scale of 1 : 50.000.