b'Geophysics in the surveysNewsUpdated State-wide magnetic and radiometric mergesGSNSW released updated versions of their State-wide magnetic and radiometric merges in June 2022. State-wide geophysical merges are typically created and maintained using regional government-funded surveys. As a result, the products use a grid cell size of 40 - 50 m. This is because the line-spacing of most regional surveys is 200 - 250 m. On a State-wide scale, these products provide excellent imagery of regional geological features, however any geophysical survey flown at less than 200 m line-spacing has finer details aliased out.In the latest update the magnetic grid has a cell size of 25 m and the radiometric 50 m, which represents a large improvement on resolution, containing four times the data density (Figures 2 and 3). The cell size has been reduced to accommodate a large suite of high-resolution company surveys flown at 100 m or closer line-spacing. The inclusion of this data has added an estimated $11 million worth of value to the final products.Geophysical merging is a complicated process that benefits from following a series of best practices in the preparatory stages. GSNSW have fully documented the procedure, allowing for seamless iteration upon existing products with newly acquired data. Full details of the merge procedure can be found in the ASEG webinar by Sam Matthews in October 2021.Sam Matthews and Astrid Carlton Geological Survey of New South WalesFigure 3.Pseudocolour total magnetic intensity (TMI) reduced to the pole (RTP) overlain on greyscale samuel.matthews@regional.nsw.gov.auTMI RTP tilt-angle filter (top). PotassiumThoriumUranium (KThU) radiometric ternary image astrid.carlton@planning.nsw.gov.au (bottom).The ASEG in social mediaHave you liked/followed/subscribed to our social media channels? We regularly share relevant geoscience articles, events, opportunities and lots more. Subscribe to our Youtube channel for recorded webinars and other content. Email our Communications Chair Millicent Crowe at communications@aseg.org.au for suggestions for our social media channels.Facebook: https://www.facebook.com/AustralianSocietyOfExplorationGeophysicistsLinkedIn company page: https://www.linkedin.com/company/australian-society-of-exploration-geophysicists/Twitter: https://twitter.com/ASEG_newsYouTube: https://www.youtube.com/channel/UCNvsVEu1pVw_BdYOyi2avLgInstagram: https://www.instagram.com/aseg_news/ AUGUST 2022 PREVIEW 24'