Cobar magnetic and radiometric survey, NSW, 2021 (P5009), Extension 1, magnetic line data

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 Cobar Magnetic and Radiometric Survey, 2021 survey were acquired in 2021 by the NSW Government, and consisted of line-kilometres of data at 200m line spacing and 60m terrain clearance.

总磁强度（Total Magnetic Intensity, TMI）数据用于测量地壳中成岩矿物成分差异所引发的地球磁场强度变化。磁异常可分为正异常（磁场强度高于正常水平）与负异常（磁场强度低于正常水平），其类型取决于岩石的磁化率。该数据集经标准化流程处理，以确保记录的磁场响应仅源自地下岩石。经处理所得数据集可通过解译揭示地下地质结构。经处理的数据由GA地球物理学家开展质量核验，以确保GA发布的最终数据适用于既定用途。本次测线数据集源自2021年科巴磁测与放射性测量项目，该项目于2021年由新南威尔士州政府实施，包含以200米测线间距、60米地形离地高度采集的测线公里数数据。