一种改进的基于TIN的多波束测深数据抽稀算法  

An Improved TIN-Based Multi-Beam Bathymetric Data Thinning Algorithm

作　　者：马丹 樊妙[1] 闫循鹏 孙毅[1] 马永 MA Dan;FAN Miao;YAN Xun-peng;SUN Yi;MA Yong(National Marine Data and Information Service,Tianjin 300171,China;Guangzhou Marine Geological Survey,Guangzhou 510760,Guangdong Province,China)

机构地区：[1]国家海洋信息中心,天津300171 [2]广州海洋地质调查局,广东广州510760

出　　处：《海洋技术学报》2019年第5期49-54,共6页Journal of Ocean Technology

摘　　要：多波束测深数据具有海量性与冗余性特征,海量的多波束数据不利于海底DEM构建与海图生产。因此,对于离散的多波束测深数据,行之有效的抽稀算法在多波束测深数据处理与应用中尤为重要。文中分析了常用的数据抽稀算法在数据处理速度以及特征地形保留方面的缺陷,提出一种通过改进基于TIN的数据处理流程的抽稀算法,并对比分析了抽稀前后海底地形特征。实验结果表明,改进的抽稀算法在数据量增大时依然可以保持较高的抽稀速度,能有效地提高数据抽稀的效率,准确保留海底地形特征。Multi-beam bathymetric data have the characteristics of enormous mass and redundancy,which are not conducive to the construction of seabed DEM and nautical chart production.For discrete multi-beam bathymetric data,therefore,an effective thinning algorithm is particularly important in multi-beam bathymetric data processing and application.In this paper,the shortcomings of common data thinning algorithms in data processing in terms of speed and feature terrain preservation are analyzed,and a new thinning algorithm is proposed based on TIN,which can improve the speed of thinning and preserve the seabed topographic features correctly by improving the data processing flow.The experimental results show that the improved thinning algorithm can still maintain a high thinning speed as the amount of data increases,and can accurately retain the characteristics of seabed topography.

关 键 词：多波束测深数据 抽稀 TIN 

分 类 号：P229[天文地球—大地测量学与测量工程]