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现代测绘工作中，电子测绘仪器及全球定位系统（ＧＰＳ）的应用亦越来越 广泛。但是如何估算 工程测量 ＧＰＳ网的点位精度，在目前的规范中尚未见到，本 文以ｘ××国际机场施工控制ＧＰＳ网为例，着重叙述了工程测量ＧＰＳ网估算 点位中误差数学模型及机场跑道方位角中误差与点位中误差及跑道长度函数 关系的数学模型的建立。
In modern surveying and mapping, the application of electronic surveying instruments and global positioning system (GPS) is also more and more widely. However, how to estimate the accuracy of the location of engineering survey GPS network has not been seen in the current norms. This article takes the construction control GPS network of x ×× International Airport as an example, and mainly describes the error mathematical model of engineering survey GPS network, Establishment of mathematical model of the relationship between error in runway azimuth and point error and runway length function.