Ayr-St Lawrence, QLD, AIRDATA, 1996 (P796), 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 Ayr-St Lawrence, QLD, AIRDATA, 1996 survey were acquired in 1995 by the QLD Government, and consisted of 108435 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。本次高程数据通过为配套本次航空磁测与放射性测量作业而使用的高度计及全球定位系统（GPS）传感器计算得到。该高程为相对于澳大利亚高程基准GDA94（AUSGEOID09）的海拔高度。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。本次航线数据集源自1996年昆士兰州艾尔-圣劳伦斯地区的AIRDATA航空调查，由昆士兰州政府于1995年获取，总数据量达108435航线公里，测线间距为400米，地形离地高度为80米。