Gibb Rock, WA, 1997 (P1076), 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 Gibb Rock, WA, 1997 survey were acquired in 1997 by the WA Government, and consisted of 4250 line-kilometres of data at 200m line spacing and 40m terrain clearance.

数字高程模型（Digital Elevation Model）表示已知高程点之间的地表地形。高程数据是利用高度计和全球定位系统（GPS）传感器计算得出的，这些传感器同时也为同一调查中的航空磁测和辐射测量数据服务。高程是相对于澳大利亚高程基准GDA94（AUSGEOID09）的高度。处理后的高程数据由GA的地球物理学家进行质量检查，以确保GA发布的最终数据符合用途要求。
这些来自西澳大利亚州吉布岩1997年调查的线状数据集由西澳大利亚州政府于1997年获取，包含4250线公里的数据，线间距为200米，地形净空高度为40米。