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COMPARISON OF INDOOR RADON MAPS
OBTAINED WITH DIFFERENT SOFTWARES AND METHODS

François Tondeur (2), Antoine Kies (1), André Robinet (1), Huichao Zhu (3)
(1) Centre Universitaire de Luxembourg (CUNLUX)
avenue de la faïencerie 162a, L1511 Luxembourg; kies@cu.lu
(2) Institut Supérieur Industriel de Bruxelles (ISIB)
rue Royale 150, B1000 Bruxelles, Belgium; tondeur@isib.be
(3) Faculté Polytechnique de Mons (FPMs)
rue de Houdain 9, B7000 Mons, Belgium; Huichao.Zhu@hydro.fpms.ac.be
Corresponding author: F. Tondeur, Tel: +32 2 2174540, Fax: +32 2 2174609, tondeur@isib.be

The use of two mapping methods, kriging and moving average, in mapping the indoor radon risk, is
investigated. Both methods are applied to three databases: simulated radon data, data collected in
Southern Belgium with low sampling density, and data collected in Luxembourg. We use commercial
software (SURFER R 6) for kriging, as well as softwares developed by the authors, especially for the radon
case, for kriging and for moving average. Simulated data prove to be very useful in this context. We
conclude that kriging as implemented in SURFER R 6 may not be well adapted to radon mapping. It seems
easier to obtain reasonable maps with the moving average, though it may be difficult to find the good
compromise between showing only significant features, and showing all of them.
Key words: indoor radon, risk mapping, software, method