Forbes Detail, NSW, 1993 (P565), 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 Forbes Detail, NSW, 1993 survey were acquired in 1993 by the NSW Government, and consisted of 49055 line-kilometres of data at a line spacing between 200m and 400m, and 100m terrain clearance.

数字高程模型（Digital Elevation Model, DEM）表征已知高程点之间的地表地形形态。本次高程数据通过本项同步测量中用于航空磁测与放射性测量的高度计及全球定位系统（Global Positioning System, GPS）传感器计算得到。该高程以澳大利亚高程基准面GDA94（AUSGEOID09）为起算基准。经处理的高程数据已由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合既定使用需求。本次测线数据集源自1993年新南威尔士州（NSW）福布斯细节测量项目，由新南威尔士州政府于1993年采集完成，总测线长度达49055线公里，测线间距介于200米至400米之间，地形离地高度为100米。