Mapping was based on the 1:100 000-scale geology layer (SARIG) using the RTMAP scheme (after Pain et al, 2007). The regolith polygon linework was newly compiled for the MALBOOMA, TARCOOLA and KINGOONYA 1:100,000 scale map sheets using ArcGIS 10.6.1. For each regolith polygon twelve attributes were captured during the mapping process including regolith materials and landforms name, description, RTMAP code and map symbol, as well as the TI (transported or in-situ) and RED (residual-erosional-depositional) scheme. Mapping and map compilation was based on a variety of data, with the 1:100,000 State geology datasets, Landsat ETM7 and 8 images, 1sec and 3sec SRTM DEM and derivative products like MrVBF, GCAS Region 9a and 9B DEM and radiometrics, Google Earth (3D view) and existing CRCLEME regolith maps for the area representing the key datasets. Spatial accuracy and linework detail was in parts improved in comparison to the 100k State geology dataset, due to the availability of higher resolution images. It should be noted that the greater Tarcoola area of the Central Gawler region regolith map represents the surface distribution and expression of the regolith and it does not include any information about regolith thickness. Limited information about bedrock weathering intensity was available from existing data sets. Therefore, outcropping bedrocks has only been subdivided into several map units based on their geological province, lithology, stratigraphy and/or age.

As mineralisation in regolith is often related to intense induration, e.g. uranium and gold in calcretes, induration of regolith material has also been mapped for the greater Tarcoola area of the Central Gawler region regolith map. Information about induration has been extracted from the existing 1:100 000-scale geology data layer in SARIG.

Two different classes of induration have been compiled as an additional layer for the Tarccola regolith dataset: siliceous and mixed calcareous-gypsiferous.