| 一种大陆坡脚点自动识别与综合判断方法 |
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| 引用本文： | 吴自银,李家彪,阳凡林,尚继宏,李守军,金肖兵.一种大陆坡脚点自动识别与综合判断方法[J].测绘学报,2014,43(2):170-177. |
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| 作者姓名： | 吴自银 李家彪 阳凡林 尚继宏 李守军 金肖兵 |
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| 作者单位： | 国家海洋局第二海洋研究所;国家海洋局海底科学重点实验室;山东科技大学测绘科学与工程学院;海岛(礁)测绘技术国家测绘地理信息局重点实验室; |
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| 基金项目： | 国家自然科学重点基金(40506017);海洋公益项目(201105001);科技基础性工作专项(2013FY112900) |
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| 摘 要： | 大陆坡脚点是200海里以外大陆架划界的核心界限点。根据《海洋法公约》第七十六条的规定和大陆架界限委员会的相关技术要求，论述了大陆坡脚点的确定方法和技术流程。通过对地形、坡度、二阶导数及D-P剖面的综合分析，提出基于二阶导数极值点和D-P算法的二次简化方法，以及原始剖面和D-P剖面的二次求导方法，通过7大步骤简化原始剖面，并给出数据点坡度、水深和二阶导数，以及曲线凹凸性、连续性和分段性等多重判定方法，实现了大陆坡脚点的自动识别。完成程序算法的底层开发，获得了与国际商用划界软件相一致的结果，并采用多波束实测水深数据对所提出的技术方法进行了有效性验证。
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| 关 键 词： | 大陆坡脚点 D-P算法 二次拟合 二次求导 自动识别 |
| 收稿时间： | 2012-12-03 |
| 修稿时间： | 2013-12-10 |
A method for automatic identification of the foot point of slope based on D-P algorithm |
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| Abstract: | The foot point of slope is the core limits of the continental shelf beyond 200 nautical miles. According to the 76th article in United Nations Convention on the Law of the Sea (brief in UNCLOS) and related technical requirements of the Commission on the Limits of the Continental Shelf, we discussed the method and technical process for the identification of the foot point of slope. In this paper, a quadratic simplified method based on the D-P algorithm and extreme points of second derivation was proposed by analyzing the terrain, slope, second derivation and the D-P profile synthetically. A quadratic derivative method was advanced also based on original and D-P profile. The original profile was simplified in 7 procedures and multiple decision methods were given such as the slope, depth, second derivation to the data, concavity, continuity and segmentation to the profile in order to identify the foot point of slope automatically. The underlying program was developed and result was coincided with the international commercial software for outer limits determination. The effectivity of the method had been verified by applying it to the real multibeam bathymetric data. |
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