应用地形信息精化山区大地水准面

REFINING THE GEOID IN MOUNTAIN AREA WITH TOPOGRAPHIC INFORMATION

在介绍由高程异常确定大地水准面有关理论的同时，提出了用地形质量计算重力异常垂直梯度的方法，结合高程异常资料，可以使山区大地水准面得到精化。将本方法应用于珠穆朗玛峰，获得其大地水准面高为－ ３０．３６ ｍ 。

While the theory about determining the geoid with the height anomaly is introduced,the method for computing the vertical gradient of gravity anomaly with the topographic mass is presented, therefore the geoid in mountain area could be refined by comb ining the gradient with the height anomaly.As an example, the elevation of geoid of the Zhumulangma Peak, -30.36m ,is obtained by this means.\;