增城市GPS高程拟合精度研究

对GPS高程测量的原理和方法进行了初步的探讨,并结合增城市GPS高程测量的应用实际,用三次多项式曲面拟合的方法,建立了县域范围内高程异常的数学模型。并采用一元回归模型方法推估拟合模型的可靠性,最后拟合出的正常高高程满足此次数字航测精度要求,在南部平原地区拟合高程达到了四等水准精度。

The Research of Zengcheng GPS Elevation Fitting Accuracy

The principle of GPS elevation measurements and methods of a preliminary study,combined with the city’s application of GPS height measurement of the actual,with the cubic polynomial surface fitting method,within the county to establish a mathematical model height anomaly.And method of using a regression model fitting model estimated the reliability of the final fitting out of the normal high-accuracy elevation to meet the requirements of digital aerial,fitting elevation in the southern plains to reach the fourth-level accuracy.