GSQ Munduberra Qld magnetic grid geodetic

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.This GSQ Munduberra Qld magnetic grid geodetic has a cell size of 0.00096 degrees (approximately 102m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1994 by the QLD Government, and consisted of 156236 line-kilometres of data at 400m line spacing and 80m terrain clearance.

总磁强度（Total Magnetic Intensity, TMI）数据用于测量由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。该数据集通过标准化流程进行预处理，以确保所记录的磁场响应仅源自地下岩石。经处理后得到的数据集可通过解译，用以揭示地下地质构造。经处理后的数据集由GA地球物理学家开展质量核验，以确保GA发布的最终数据满足实际应用需求。本GSQ昆士兰州蒙杜贝拉（Munduberra, Qld）大地测量磁网格数据集的格网单元尺寸为0.00096度（约合102米）。数据单位为纳特斯拉（nanoTesla, nT）。本网格所用数据由昆士兰州政府于1994年采集，总测线长度达156236线公里，测线间距为400米，地形离地高度为80米。