一种基于CGCS2000框架的单椭球七参数转换法
发布时间：2018-08-04 12:51
【摘要】：针对RTK三维水深测量技术中GPS大地高需拟合成正(常)高的问题,该文在常规七参数转换法的基础上提出一种基于CGCS2000框架的单椭球七参数转换方法,有效弥补了二次曲面法在外推拟合GPS高程时精度衰减的不足。该文重点阐述了单椭球七参数转换法的构造原理、流程及其特点,最后通过椒江出海口水下地形测量项目实例证明:该文算法在拟合精度的内插方面不低于经典的二次曲面法;外推方面,在椒江口向东海外推超过20km时,仍能保证厘米级的拟合精度,且相比二次曲面法精度高出一个数量级。
[Abstract]:In order to solve the problem that GPS geodetic height needs to be combined with normal height in RTK 3D bathymetry technology, a single ellipsoid and seven parameter conversion method based on CGCS2000 framework is proposed in this paper based on the conventional seven-parameter conversion method. It makes up the deficiency of precision attenuation when Quadric surface method is extrapolated to fit GPS elevation. This paper focuses on the construction principle, flow chart and characteristics of the single ellipsoid and seven parameter conversion method. Finally, through the example of underwater topographic survey of Jiaojiang River, it is proved that the interpolation accuracy of this algorithm is not lower than that of the classical Quadric surface method; In the extrapolation aspect, when the Jiaojiang Estuary pushes eastward over 20km, the fitting accuracy of centimeter level can still be guaranteed, and the precision is one order of magnitude higher than that of Quadric Surface method.
【作者单位】： 浙江省河海测绘院;河海大学地球科学与工程学院;
【分类号】：P226.3;P228.4
本文编号：2163937
[Abstract]:In order to solve the problem that GPS geodetic height needs to be combined with normal height in RTK 3D bathymetry technology, a single ellipsoid and seven parameter conversion method based on CGCS2000 framework is proposed in this paper based on the conventional seven-parameter conversion method. It makes up the deficiency of precision attenuation when Quadric surface method is extrapolated to fit GPS elevation. This paper focuses on the construction principle, flow chart and characteristics of the single ellipsoid and seven parameter conversion method. Finally, through the example of underwater topographic survey of Jiaojiang River, it is proved that the interpolation accuracy of this algorithm is not lower than that of the classical Quadric surface method; In the extrapolation aspect, when the Jiaojiang Estuary pushes eastward over 20km, the fitting accuracy of centimeter level can still be guaranteed, and the precision is one order of magnitude higher than that of Quadric Surface method.
【作者单位】： 浙江省河海测绘院;河海大学地球科学与工程学院;
【分类号】：P226.3;P228.4
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