Ashton, WA,1994 (P623), 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 Ashton, WA,1994 survey were acquired in 1993 by the WA Government, and consisted of 51484 line-kilometres of data at 400m line spacing and 60m 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形态。本次测量中，高程数据通过为航空磁测与放射性测量配套使用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）的海拔高度。经处理的高程数据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查，以确保该局发布的最终数据符合使用需求。 本次线数据集源自1994年西澳大利亚州阿什顿地区的测量项目，由西澳大利亚州政府于1993年采集，总数据长度达51484线公里，测线间距为400米，飞行离地高度为60米。