b'Geophysics in the surveysNewsGCAS data and information on the project. A subscription service has been useful in providing subscribers with email updates when survey acquisition commences, completes or when new data is made available. The web map also has direct links to all data downloads and contact information for survey contractors.Available dataThe primary GCAS data releases consist of the deliverables from the survey contractors, which have been rigorously quality controlled by the Geological Survey of South Australia, in partnership with Geoscience Australia. These deliverables include:Final located data: magnetic, radiometric and elevation data.Gridded magnetic images: TMI, RTP TMI, RTP TMI 1VD in geodetic and projected coordinate systemsGridded radiometric images: Dose, Uranium, Thorium, Potassium, Ternary (RGB) with NASVD and no NASVD, in projected and geodetic coordinate systemsGridded radar and laser altimeter derived elevation: in geodetic and projected coordinate systemsValue-added data package releases Figure 2.Elevation of magnetic source, interpolated from 4627 individually modelled magnetic source A major initiative to extend the GCASsolutions, now available through the enhanced data packages produced in collaboration with CSIRO.body of work has been through a collaborative effort with CSIRO. Cliveunfettered access to the highestNext steps for the GCAS ProjectFoss from CSIRO, in partnership withquality magnetic, radiometric, and GSSA has produced a series of enhancedelevation data ever acquired by theThe GCAS team are now preparing to geophysical imagery, magnetic sourceGovernment of South Australia. Theremerge the individual GCAS grids into depth models and reports using theare multiple ways that the public cansets of continuous surfaces covering GCAS TMI data, complemented byget the data, beginning with SARIG,the entire GCAS project area. This regional gravity data. These collectionswhere the gridded GCAS data can bewill involve careful re-gridding of the of images and digital data products haveviewed on screen and downloaded.individual survey regions using a single, been generated to facilitate geologicalFrom the SARIG interface links toconsistent set of gridding parameters interpretation. The products are notdata packages which contain the fullwith careful attention paid to the themselves interpretive, but provideset of deliverables listed above, formaintaining grid co-nodularity across more direct access to interpretationeach GCAS block can be downloaded.the region. This eliminates resampling than the directly measured data. TheseSARIGs advanced geophysical searchduring processing to ensure an end products, and in particular the magneticcapability can be used to downloadproduct with minimal effects introduced source depth estimates (Figure 2), areportions of the GCAS located databy processing, which may affect the designed to provide a live resource whichor grids, plus SARIGs new airbornefinal product. This is a well understood can be progressively upgraded rathersurveys time-slice tool provides links toand straightforward process for TMI and than simply replaced as further studiesdirect download of the data packages.elevation grid merging but radiometric are undertaken in the area, the depthAs indicated above, links to the datagrid merging is somewhat more solution database is added to, or newpackages are also available via thecomplicated, due to the latter requiring drillholes are reported (Foss, et al, 2018). GCAS web page. Through the use ofboth shifting and rescaling in order to cloud technology, these data packagesachieve a robust merged product. To Where to get the data are now being made availableimprove the radiometric merge process, through Amazon Web Services (S3),data from the Whyalla test lines (flown Mineral explorers, academia andensuring high reliability and speed ofas part of the GCAS to enable a direct community stakeholders havedownloads. comparison of acquired data over the APRIL 2020 PREVIEW 20'