Southeast Lachlan, NSW, 2010 (P1218), 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 Southeast Lachlan, NSW, 2010 survey were acquired in 2010 by the NSW Government, and consisted of 108251 line-kilometres of data at a line spacing between 250m and 500m, and 60m terrain clearance.

本数字高程模型（Digital Elevation Model, DEM）用于表征已知高程点之间的地表地形。本次高程数据通过为开展本次航空磁测与放射性测量调查所使用的高度计及全球定位系统（Global Positioning System, GPS）传感器计算得到。该高程值以澳大利亚高程基准GDA94（AUSGEOID09）为参考基准。经处理后的高程数据将由GA地球物理学家开展质量核验，以确保GA对外发布的最终数据满足使用要求。本次测线数据集由新南威尔士州政府于2010年采集，源自新南威尔士州东南部拉克伦地区2010年航空调查，总测线里程达108251线公里，测线间距介于250米至500米之间，地形离地高度为60米。