NSW DMR, Discovery 2000, 1994-95, AREA I, Albury (P739), 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, 1994-95, AREA I, Albury survey were acquired in 1996 by the NSW Government, and consisted of 35041 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.总磁强度（Total Magnetic Intensity, TMI）数据旨在测量由地壳中成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）两类，具体取决于岩石的磁化率特性。本数据集通过标准流程进行预处理，以确保所记录的响应仅源自地下岩石。经处理后得到的数据集可通过解译，揭示地下地质构造特征。经处理的数据由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。本次测线数据集源自新南威尔士州矿产资源局（NSW DMR）2000年勘探项目（Discovery 2000）1994-1995年的I区域奥尔伯里勘测，由新南威尔士州政府于1996年获取，总测线长度达35041线公里，线间距为250米，地形离地高度为60米。为约束数据中的长波长分量，本次勘测采用独立数据集——全澳航空地球物理勘测（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，对本次勘测数据的基准面进行校正。本次勘测数据已基本校正至AWAGS基准面。