Raw radiometric data for each of the sixteen GCAS regions were reprocessed for DEM by Baigent Geosciences, in an effort to retain maximum signal and achieve the highest possible degree of internal consistency in relation to data calibration and processing across the broader GCAS survey region. Noise-adjusted singular value decomposition (NASVD) smoothing was incorporated into the processing stream, which is detailed in processing reports provided in the download package. The resulting located data was used for the merged GCAS radiometric products. The release of this raw data provides the lineage between the merged product and its data sources. The subject data package contains, separately for each of the sixteen GCAS survey regions, the located, reprocessed (using NASVD) radiometric data, processing report, and geodetic (GDA94) and projected (GDA94, MGA53) grids in order of presentation as follows: • Located data – dat, des, dfn files • Geodetic and projected grids of dose rate, uranium ppm, thorium ppm, potassium % • Processing report.