The map application makes available survey, radiometric and radioecological data of roughly fifty years of work of the former company ČSUP (Czechoslovak Uranium Industry). The maps and attribute tables describe radioactive objects (RO) with radiometric measurements (gamma, radon) and verification works (wells, shafts, trenches, mine works). According to the evaluation of the works carried out, the ČSUP allocated an anomalous area of radioecological risk. On the basis of the data of ČSUP, an estimate of the size of the Rn index was currently made for objects with radon measurement. Another topic is the radiometric research of ČSUP in four categories according to the details of the measurement. The application is complemented by a composition of vectorized maps of the CSUP at a scale of 1:500,000, which show regional geological units, a structural map, a map of U-mineralization and the radioecological risk of geological units.