通过地面网与卫星网的联合平差，以改善网的精度和建立高精度的地心坐标系统，是当前大地测量的一项重要任务。

It is an important mission of Geodesy to improve an accuracy of control networks and to establish the geocentric coordinate system via combined satellite and terrestrial network adjustment.

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本文运用MATLAB软件对测量数据处理进行了尝试，并给出条件平差中水准网平差的函数程序。

In this paper, how to apply MATLAB to process measure data is attempted and how to programme the function of adjustment by condition equations in leveling net is described.

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测量上有许多极值问题，如各种准则下的平差，权的最优分配，网的优化方案等，多可归于线性极值问题，且多不适用寻常数学解法。

There are many extreme problems in surveying, like the optimal distribution of weight, optimal design of networks, the method of least absolute sum etc.

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