c:/dev/skygeo/src/iso2stac/stac_output_dynamic/catalog.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-norwegian_radiation_and_nuclear_safety_authority/collection.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-norwegian_radiation_and_nuclear_safety_authority/20b933c3-c17e-41e8-8fc3-ea264b199639/20b933c3-c17e-41e8-8fc3-ea264b199639.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-norwegian_radiation_and_nuclear_safety_authority/collection.json
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The grid cell data set is derived from indoor radon concentration data present in the NRPA's database as of 28/03/2012. Only data from living rooms and bedrooms located on the ground floors of residential buildings were used. Statists were generated for data falling in 5 km x 5 km cells covering all of the Norwegian mainland. The statistics include the number of data falling in each cell (N). the maximum and minimum radon concentration values (max, min), the mean and standard deviation (am and sd), the mean log and standard deviation log (aml, sdl), the median (med), the geometric mean (gm) and measures of radon susceptibility (pct1, pct2, pct3, cdf1, cdf2, cdf3, bay1, bay2, bay3) The measure of radon susceptibility is the percentage of radon values that exceed a critical threshold value. Pct1, pct2 and pct3 are the actual percentages of values in the cells that exceed 100, 200 and 400 Bq/m3 respectively. Cdf1, cdf2 and cdf3 are the same measures of radon susceptibility as pct1, pct2 and pct3 but they are derived from the mean and standard deviation of log radon values. bay1, bay2 and bay3 are the same measures of radon susceptibility as pct1, pct2 and pct3 but they are derived from the mean and standard deviation of log radon values and Bayesian "prior knowledge" parameters. The "pct" measures of radon susceptibility are simply derived and therefore it is tempting to use them. However, when N is small, a better estimate of the actual radon susceptibility within a cell might be derived from the "bay" measures that are influenced by prior knowledge of the statistical distribution of radon values. Cells are included if they enclose one or more radon values. Clearly the validity of statistical values drops when N falls below 30
Annet Modellbaserte vegprosjekter fellesDatakatalog Geologi Network of square areas each measuring 5 km x 5 km Norway Norwegian mainland Radon hazard assessment Radon in indoor air Indoor radon concentration Radon susceptibility mapping Statistics Live Data and Maps Downloadable Data health
The grid cell statistics are based on the national database of indoor radon measurements maintained by the Norwegian Radiation Protection Authority updated to 28th March 2012. Statistical parameters include X (X-co-ordinate of the centre of the cell); Y (Y-co-ordinate of the centre of the cell); N (number of radon concentration data in the cell); am (arithmetic mean Bq/m3); sd (standard deviation associated with am); aml (arithmetic mean of log concentrations); sdl (standard deviation associated with aml); gm (geometric mean); med (median); min (minimum); max (maximum); pct1 (actual percentage of concentrations above 100 Bq/m3); cdf1 (as pct1 but derived from the log-normal distribution of radon values in the cell); bay 1 (as cdf1 but modified using Bayesian statistics on the whole data set); Pct2, cdf2 and bay2 (percentages above 200 Bq/m3); Pct3, cdf3 and bay3 (percentages above 400 Bq/m3)
Radon in indoor air in Norway