GSV East Gippsland Vic 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 GSV East Gippsland Vic magnetic grid geodetic has a cell size of 0.0005 degrees (approximately 49m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1998 by the VIC Government, and consisted of 16736 line-kilometres of data at a line spacing between 200m and 400m, and 75m terrain clearance.

总磁强度（Total Magnetic Intensity, TMI）数据用于测量地壳内造岩矿物成分差异所引发的地球磁场强度变化。根据岩石的磁化率差异，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。该数据已通过标准处理流程校正，确保记录的响应仅源自地下岩体。经处理生成的数据集可通过解译揭示地下地质构造。澳大利亚地球科学局（Geoscience Australia, GA）的地球物理学家已对处理后的数据开展质量核查，确保该局发布的最终数据符合使用要求。
本次维多利亚州东吉普斯兰地区的维多利亚州地质调查局（Geological Survey of Victoria, GSV）大地测量磁网格数据，网格单元尺寸为0.0005度（约49米），计量单位为纳特斯拉（nanoTesla, nT）。该网格的数据由维多利亚州政府于1998年采集，总测线长度达16736测线公里，测线间距介于200米至400米之间，采集时的地形离地高度为75米。