GSQ Mt Isa Southeast 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 Mt Isa Southeast magnetic grid geodetic has a cell size of 0.00083 degrees (approximately 88m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2006 by the QLD Government, and consisted of 100960 line-kilometres of data at 400m line spacing and 80m terrain clearance.

总磁强度（Total Magnetic Intensity, TMI）数据用于量化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（磁场强度高于基准水平）与负异常（磁场强度低于基准水平），其类型取决于岩石的磁化率。
该数据通过标准流程开展处理，以确保记录的磁场响应仅源于地下岩石。
处理后生成的数据集可通过解译揭示地下地质构造特征。
经处理的数据将由GA的地球物理学家进行质量核验，以确保GA发布的最终数据满足使用需求。
本GSQ芒特艾萨东南磁网格大地测量数据集的网格单元尺寸为0.00083度（约88米）。
数据单位为纳特斯拉（nanoTesla, nT）。
用于生成该网格的数据由昆士兰州（QLD）政府于2006年采集，总测线长度达100960公里，测线间距为400米，地形离地高度为80米。