【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.更多还原

【Abstract】 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.更多还原