Middle Pilbara, WA, 1996 (P648), 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 Middle Pilbara, WA, 1996 survey were acquired in 1996 by the WA Government, and consisted of 34960 line-kilometres of data at 400m line spacing and 80m terrain clearance.

数字高程模型（Digital Elevation Model）表征已知高程点之间的地表地形。该高程数据由同一次航次中用于获取航磁与放射性测量数据的高度计及全球定位系统（Global Positioning System，GPS）传感器计算得出。该高程为相对于澳大利亚高程基准面GDA94（AUSGEOID09）的高度值。经处理的高程数据由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。这套采自1996年西澳大利亚州中皮尔巴拉地区航次的测线数据集，由西澳大利亚州政府于1996年采集完成，数据总长34960测线公里，测线间距为400米，地形飞行净空高度为80米。