Research Analysis of GPS Elevation Fitting Method
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摘要: 以安徽省谢桥矿2111(3)工作面倾向线测区为例,分别采用平面拟合、曲面拟合、多面函数、BP神经网络的方法实现了对区域内GPS/水准联测点的高程转换。结果表明,多面函数与BP神经网络高程拟合精度最高,平面拟合精度最低,多面函数拟合法外符合精度可达1.36 cm左右,RMS在1.9 cm左右,检核点残差值在1~3.5 cm之间,BP神经网络外符合精度可达1.92 cm之间,RMS在1.37 cm左右,说明利用GPS测量结合水准测量的数据来拟合高程异常值,从而计算出各GPS点的正常高是一种行之有效的方法,能够满足一般工程建设的需要。Abstract: This paper takes the inclined line survey area of 2111(3) working face of Xie Qiao mine in Anhui Province as an example, elevation conversion GPS/level measurement points in the region is realized by plane fitting, surface fitting, multi36 cm, the RMS is about 1.9 cm, the residual value of the checkpoint is 1~3.5 cm, The BP neural network in accordance with the accuracy of up to 1.92 cm and RMS in 1.37 cm, indicating the use of GPS measurement combined with the level of measurement data to fit the elevation anomaly, to calculate the normal high point of each GPS is a line Effective way to meet the needs of general engineering construction.
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Key words:
- Elevation fitting /
- plane fitting /
- surface fitting /
- polygon function /
- BP neural network
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