Application displays Radon index map of the bedrock of the Czech Republic at a scale of 1 : 50,000 from mapping activities during 1999–2005. It's possible to search by year of publishing, map name and map sheet number. Application is available also on CD-ROM (e-shop).

Radon Risk Map of the Bedrock at 1 : 500,000 scale. This map shows the prevailing radon index of different types of bedrock: 1. Low (Mesozoic and Tertiary sediments), 2. Intermediate (Quaternary sediments), 3. Medium ( Metamorphic rocks and Palaeozoic sediments), 4. High (Magmatic rocks, except for the Pre-Variscan granitoids – medium index), 5. Tectonic features, 6. Boundaries of regions