Mt Elizabeth, WA,1993 (P626), magnetic line data, AWAGS levelled

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the Mt Elizabeth, WA,1993 survey were acquired in 1993 by the WA Government, and consisted of 50696 line-kilometres of data at 400m line spacing and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

总磁强度（Total Magnetic Intensity，TMI）数据用于测量由地壳中造岩矿物含量差异引起的地球磁场强度变化。磁异常可根据岩石磁化率分为正异常（磁场强于正常值）和负异常（磁场弱于正常值）。数据通过标准方法进行处理，以确保记录的响应仅来源于地下岩石。处理结果生成的数据集可通过解释揭示地下地质结构。处理后的数据由GA地球物理学家进行质量检查，以确保GA发布的最终数据符合预期用途。

这些来自1993年西澳大利亚（WA）伊丽莎白山勘测的测线数据集由WA政府于1993年获取，包含50696测线公里的数据，测线间距为400米，地形净空高度为60米。为了约束数据中的长波长成分，研究使用了一个独立数据集——全澳大利亚航空地球物理勘测（Australia-wide Airborne Geophysical Survey，AWAGS）的航空磁测数据——来控制该勘测数据的基准面。该勘测数据本质上已与AWAGS进行了基准面校正。