Cobar-Nymagee Part 2, NSW, 1999 (P742), 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 Cobar-Nymagee Part 2, NSW, 1999 survey were acquired in 1999 by the NSW Government, and consisted of 31212 line-kilometres of data at 250m 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。本次高程数据通过同一次航空磁测与放射性测量作业中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。经处理的高程数据已由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需求。本次测线数据集源自1999年新南威尔士州 (NSW) 政府采集的科巴-尼马吉第二分区测线项目，总数据量达31212线公里，测线间距为250米，作业离地高度为60米。