20230719 16143600 1.0 TRUE Qld variable RTP 1VD image First vertical derivative of variable reduced to magnetic pole image of merged regional scale airborne geophysical magnetic surveys carried out across Queensland. The 1VD filter has been applied to a subset of Geoscience Australia’s Magmap version 6. The image shows the vertical rate of change in Earth’s magnetic field. © State of Queensland (Department of Resources), 2023