作者信息
- 1. 江苏淮阴水利建设有限公司，江苏 淮安 223005
- 折叠
摘要
利用不同插值方法内插离散水深点，以误差传播定律为基础进行内插值精度分析，同时建立单波束水深内插值中误差的数学模型。选择同一海岸带的 3 个样区进行实验，结果表明，在自适应搜索半径法的辅助下，利用反距离加权法和线性插值三角网法获得的水深值粗差比例较低，属于较优的插值模型；内插值精度与数据源密度基本无关，与数据源精度存在较大关系；在深度测量极限误差已知的情况下 , 本文认为处于水深为 25m 以下的格网点，其水深值极限误差可设置为 0.45m。
Abstract
In the paper, the interpolations of discrete depth points are from different interpolation methods. Thenbased on error propagation law, the accuracy analysis for interpolations is started. A mathematical model of mediumerror expression for interpolation of water depth in single beam is established. Three sample areas of a coastal zonein China were selected for the experiment, The experiment results show that the inverse distance weighting method andthe linear interpolation triangulation method are supported by the adaptive search radius method. The interpolationprecision is related to the data source precision, but not with the data source density. In the case of a given depthmeasurement limit error, this paper proposes that the limit error of the depth limit of the mesh point with depth below25m can be set to 0.45m.
关键词
单波束/数字水深模型/内插/精度Key words
single beam antennas/digital depth model/interpolation/precision引用本文复制引用
出版年
2018
NETL
NSTL
万方数据