Gairdner - elevation line data

The Digital Elevation Model represents ground surface topography between points of known elevation. The elevation data was calculated using the altimeters and Global Positioning System (GPS) sensor used for the benefit of airborne magnetic and radiometric data on the same survey. The elevation is the height relative to the Australian Height Datum GDA94 (AUSGEOID09). The processed elevation 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 Gairdner Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey were acquired in 2018 by the SA Government, and consisted of 104788 line-kilometres of data at 200m line spacing and 60m terrain clearance.

该数字高程模型（Digital Elevation Model，DEM）用于表征已知高程点之间的地表地形形态。本次高程数据通过本次航空磁测与放射性测量作业中搭载的高度计及全球定位系统（Global Positioning System，GPS）传感器计算得到。该高程为相对于澳大利亚高程基准面GDA94（AUSGEOID09）的高度值。经处理的高程数据已由澳大利亚地球科学局（Geoscience Australia，GA）的地球物理学家开展质量核验，以确保该局发布的最终数据符合使用要求。本次测线数据集源自2018年南澳大利亚州（South Australia，SA）政府实施的盖尔纳航空磁测、放射性测量与数字高程模型勘测项目，该项目于2018年完成，共包含104788线公里的勘测数据，测线布设间距为200米，作业地形离地高度为60米。