The 2024 Bouguer gravity grids of South Australia, gridded from 1,025,324 gravity observations, extracted from the South Australian gravity database. All open file surveys processed to March 2023 were included in the grid. Duplicate stations and stations interpreted as unsuitable for gridding were not included in the processing. The Bouguer anomaly calculation used a spherical cap model, and the primary units of the grid are µm/sec2.

The gridding process utilised the supervised variable density gridding methodology (Katona 2017), which preserves the optimal grid resolution of both coarse and fine spaced gravity stations, smoothly merging variable station densities to a final grid with 100m cell size.
The 2024 gravity data package includes these data products in .ers format: -Bouguer Gravity grids (100m pixel size), -First vertical derivative of the Bouguer Gravity (units are 1/sec2). -Residual Bouguer Gravity, calculated as the difference between the Bouguer Gravity dataset and the same Bouguer Gravity dataset, but upward continued 1000m. Each of these three grids are available in 5 Datum/Projection combinations: -GDA2020 Geodetic -GDA2020 South Australian Lambert -GDA2020 MGA52 -GDA2020 MGA53 -GDA2020 MGA54 Also included: -A collection of unclipped Bouguer Gravity grids, for those users looking at Bouguer Gravity outside the area of the other products -Images are provided in 3 band, 8 bit Geotiff format, to support display and illustration. -A report is also available

Grids have been interpolated from geo-located survey data are supplied in high precision 32 or 64 bit ERS format, processed to support data analytics.
ESRI layer files are provided for rendered display of ERS grids in ArcMap (lyr files) and ArcGIS Pro (lyrx files).

This supersedes the previous version; ' South Australian regional gravity grids and images, 2023'