Tanami MainNS - ground elevation geoid grid (laser)

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Tanami MainNS - ground elevation geoid grid (laser) is elevation data for the NTGS Tanami NS Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018. This survey was acquired under the project No. 1312 for the geological survey of NT. The grid has a cell size of 0.00036 degrees (approximately 40m). This grid contains the ground elevation relative to the geoid for the NTGS Tanami NS Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.数字高程数据（Digital Elevation Data）记录了地球物理勘探过程中采集并经后处理的点状、线状定位地形高程变化信息。本次的塔纳米MainNS地面高程似大地水准面（激光）网格数据，对应2018年北领地（NT）NTGS开展的塔纳米NS详细航空磁法与放射性测量及数字高程测量项目。该数据采集工作隶属于北领地地质调查项目编号1312。该网格的单元尺寸为0.00036度（约合40米），包含上述2018年北领地NTGS项目中，相对于似大地水准面的地面高程数据。其数值代表地球表面任意点位至似大地水准面的垂直距离，数据单位为米。经后处理的数据已由GA地球物理学家完成质量核查，以确保GA发布的最终数据符合使用需求。