NSW DMR, Discovery 2000 Area K, Peel - South West (Maules Creek), NSW, 1998 (P740), 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 NSW DMR, Discovery 2000 Area K, Peel (Inverell,Manilla), NSW, 1998 survey were acquired in 1998 by the NSW Government, and consisted of 61165 line-kilometres of data at 250m 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.

总磁场强度（Total Magnetic Intensity, TMI）数据用于量化地壳内造岩矿物组分差异引发的地球磁场强度变化。磁异常可分为正异常（磁场强度高于正常值）与负异常（磁场强度低于正常值），其类型取决于岩石的磁化率特性。该数据集通过标准化处理流程，确保所记录的磁场响应仅源自地下岩石。经处理得到的数据集可通过解译揭示地下地质构造。经处理的数据需由GA地球物理学家开展质量核查，以确保GA发布的最终数据满足使用需求。本次1998年采集的测线数据集来自新南威尔士州矿产资源局（NSW DMR）的Discovery 2000 K区域、皮尔地区（因弗雷尔、马尼拉）项目，由新南威尔士州政府于1998年完成采集，总测线长度达61165线公里，测线间距为250米，地形离地高度为60米。为压制数据中的长波长信号，本次调查采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——对测线数据的基准值进行校正。本测线数据已基本平差至AWAGS基准。