Tiwi Islands, NT, 2006 (P1137), 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 Tiwi Islands, NT, 2006 survey were acquired in 2006 by the NT Government, and consisted of 30001 line-kilometres of data at 400m line spacing and 80m terrain clearance.

数字高程模型（Digital Elevation Model）用于表征已知高程点之间的地表地形。本次高程数据通过本调查中为航空磁测与航空放射性测量服务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）的相对高度。经处理的高程数据已由澳大利亚地质调查局（Geoscience Australia，简称GA）的地球物理学家完成质量核查，以确保该局发布的最终数据满足实际应用需求。本次测线数据集源自2006年北领地（Northern Territory，NT）提维群岛的测量项目，由北领地政府于2006年采集，包含总测线长度达30001千米的观测数据，测线间距为400米，地形飞行离地高度为80米。