GSV Offshore Otway Basin Vic magnetic grid geodetic

Total magnetic intensity data measures variations in the intensity of the Earth's magnetic filed caused by the contrasting content of rock-forming minerals in the Earth's crust. The data are collected on airborne geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector.总磁强度数据（Total magnetic intensity data）可表征由地壳中成岩矿物含量差异所引起的地球磁场强度变化。该数据集采集自联邦、州及NT政府与私营部门开展的航空地球物理调查。