Mineral Resources Tasmania maintains metadata and digital data for open-file airborne geophysical surveys over the State. This includes an Airborne Survey index of where airborne surveys (using a range of geophysical techniques) have been flown. Data from all airborne geophysical surveys conducted in the State must be sent to MRT.

All open file data can be downloaded via Airborne Survey Search below.

The index of open-file airborne geophysical surveys for which digital data are held by MRT may be searched by selection criteria or via the Map Viewer to locate and obtain specific surveys. Shapefiles (with associated metadata), tabular metadata and digital data can then be downloaded by selecting Show Map and then using the export function of the map viewer

View the observation point distribution map
A map showing all open-file gravity observation points may searched spatially and information about selected stations viewed.

Download the Bouguer Data
Download the entire open-file Tasmanian gravity database as Bouguer anomaly data.

Download the Residual Gravity Data
Download the entire open-file Tasmanian gravity database as residual anomaly data.

The residual anomaly is produced by correcting the Bouguer anomaly data for the effects of Moho topography and the bathymetry of the waters surrounding Tasmania at each observation point. (see MRVGP8, UR1988/08 and GPCR2009_01 for details).

Gravity base stations may be searched textually and/or spatially to locate specific base stations.

Mineral Resources Tasmania maintains an index of gravity base stations that can be used as reference values for future surveys. The primary network was established by Geoscience Australia with subsidiary stations being established to facilitate later regional or detailed surveys.