单波束测深数据的插值精度分析

发布时间：2018-01-15 15:10

本文关键词：单波束测深数据的插值精度分析　出处：《测绘通报》2017年03期 　论文类型：期刊论文

【摘要】：基于误差传播定律,对稀疏的离散水深点内插值进行了精度分析,建立了单波束水深内插值中误差表达的数学模型,利用我国南方某海岸带的3个试验区的进行了试验。试验结果表明,反距离加权法、Shepard法和线性插值三角网法,辅以自适应搜索半径法,内插水深值粗差比例普遍低于5%,质量与效率上为较优的插值模型;内插值精度与数据源精度有关,但与数据源密度关系不大;在给定深度测量极限误差情况下,建议在制定有关数字水深模型标准时,对水深在20 m以内的格网点水深值极限误差可设置为0.4 m。
[Abstract]:Based on the law of error propagation, the accuracy of the sparse discrete water depth interpolation is analyzed, and the mathematical model of the error expression in the single beam water depth interpolation is established. Experiments were carried out in three experimental areas of a coastal zone in the south of China. The experimental results show that the inverse distance weighting method Shepard method and the linear interpolation triangle network method are supplemented by adaptive search radius method. The ratio of gross error of interpolation depth is generally lower than that of 5. The interpolation model is better in quality and efficiency. The precision of interpolation is related to the precision of data source, but not to the density of data source. Given the limit error of depth measurement, it is suggested that the limit error of grid depth within 20 m can be set to 0.4 m when the standard of digital water depth model is formulated.
【作者单位】：广东省国土资源测绘院;
【基金】：2015年测绘地理信息行业标准项目广东省国土资源科技专项(GDGTKJ2016001)
【分类号】：P229
【正文快照】： 数字水深模型(digital depth model,DDM)是海底地形地貌形态表达的基本内容和基础框架[1],以数字形式逼真地模拟再现海洋环境,使人们可以更加直观地了解和探索海底地形地貌。数字水深模型的质量高低,直接影响海洋空间信息表达的准确性和舰船航行的安全性。近年来,随着多波束全

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