高程拟合技术在水利测量中的应用

Application of Elevation Fitting Technology in Water Conservancy Survey

本文根据已有控制点的大地高和水准高,计算高程异常,通过多项式曲面拟合方法计算高程拟合参数,运用FJCORS系统的网络RTK对已有的水准点进行高程数据采集,进一步验算拟合高程的准确性。作者结合其单位在漳州市东南部沿海地区九龙江调水工程进行实例分析。所求得的高程拟合参数,运用于区域范围的工程测量中能够同步实时获取正常高,减少采集后的内业高程改正过程;与传统水准测量方法相比,省略了水准测量的外业时间,从而提高了工作效率。

In this paper,according to the geodetic height and leveling height of the existing control points,the height abnormity is calculated and the height fitting parameters are calculated by the polynomial surface fitting method.The network RTK of FJCORS system is applied to collect the height data of the existing leveling points and the accuracy of elevation fitting can be further checked.The reliability of elevation fitting accuracy is verified by an example of the water diversion project of Jiulong River in the southeast coastal area of Zhangzhou City.The obtained elevation fitting parameters can be simultaneously applied to the regional engineering survey to acquire the normal height in real time and reduce the process of indoor elevation correction after collection.Compared with the traditional leveling method,the field time for leveling is saved so as to improve the work efficiency.