Tasmania Offshore Area0124 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.总磁场强度数据（Total Magnetic Intensity）用于表征地壳中成岩矿物组分差异导致的地球磁场强度变化。该类数据采集自英联邦、各州及北领地（NT）政府与私营部门开展的航空地球物理调查。