Wagin, WA, 2008 (P1177), 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...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。该高程数据通过高度计与全球定位（原文未完整表述）计算获取。