摘要
为解决大数据量海底地形等深线快速生成问题,提出一种基于等深值索引序列的等深线快速生成算法。该算法通过建立深度属性和等深值索引属性的映射关系,将浮点型深度属性三角网转化为整型索引属性三角网,并在此基础上提出一种基于0/1异或的等深线走向快速判断方法进行等深线跟踪,实现等深线的快速生成。实测海底地形数据的测试结果表明,与常规算法相比,该算法具有更快的生成速度并且十分适合计算机编程实现,能够快速、准确地从大数据量数字海底地形中生成等深线.
To solve the problem of generating contours from a large volume of seafloor terrain data efficiently,a fast algorithm of contour generation based on the depth index sequence attribute was proposed.By mapping the index attribute to the depth attribute,the algorithm transformed the float depth attribute triangulation net into an integer index attribute triangulation net.On this basis,a fast decision method was proposed based on 0/1 exclusive-OR for contour tracing,finally achieving fast contour generation.The experimental results of the surveyed seafloor terrain data show that compared with general algorithms,the proposed algorithm generates contours faster and is very appropriate for computer programming.It can generate contours from a large volume of seafloor terrain data efficiently and precisely.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第5期622-628,共7页
Journal of Harbin Engineering University
基金
国家863计划资助项目(2007AA09Z124)
国家科技部国际合作项目(2008DFR70320)
国家自然科学基金资助项目(41006057
41076056
60872107)
中国高等学校博士点基金资助项目(20092304110010
20102304120028)
水声技术重点实验室基金资助项目(91407200302100C2005
9140C200403110C20)
中央高校基本科研业务费专项基金项目(HEUCFR1012)
关键词
等深线
多波束测深
海底数字地形建模
不规则三角网
快速生成
depth contours
multibeam bathymetry
seafloor digital terrain modeling
triangulated irregular network
fast generation
fast algorithm
