Hann River elevation grid geodetic

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Hann River elevation grid geodetic is elevation data for the Hann River, Qld, 1991. This survey was acquired under the project No. 570 for the geological survey of QLD. The grid has a cell size of 0.00083 degrees (approximately 91m). This grid contains the ground elevation relative to the geoid for the Hann River, Qld, 1991. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.数字高程数据（Digital Elevation data）通过处理地球物理调查（geophysical survey）中记录的点或线位置数据，来记录地形高度变化。这份汉恩河高程格网大地测量数据是1991年昆士兰州（Qld）汉恩河的高程数据。该调查是在昆士兰州地质调查（geological survey）项目编号570下开展的。格网的单元格大小为0.00083度（约91米）。该格网包含1991年昆士兰州汉恩河相对于大地水准面（geoid）的地面高程，它表示地球表面某一位置到大地水准面的垂直距离。数据单位为米。处理后的数据由GA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预期用途。