At present, GPS plane control net is widely applied, but the GPS elevation is not used widely. The people expect that the GPS elevation surveying can take the place of the conventional leveling.

当前，GPS平面控制网已经得到了广泛的运用，但是GPS高程却运用得不够，人们期望着能够用GPS高程测量代替传统的水准测量。

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Since leveling is one of the important branches of surveying, its' software designing has great realistic significance.

水准测量是测绘学科的一个重要分支，开发水准测量程序具有重要的现实意义。

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When surveying major diameter and higher hanging pipeline, common trigonometric leveling can't meet precision requirement, but tangent method surveying can meet precision requirement.

在悬空管线测量中，对于管径大、悬空高的管线，用普通三角高程法测量很难满足精度要求，而用切线法测量则很容易达到精度要求。

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The mixing of genres is successfully achieved here, as players will find themselves leveling up heroes, building structures to gain new powers and generate resources, and spending time surveying the city for assorted forms of tappable currency.

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