基于AIS数据的船舶锚位面积计算  

Calculation of ship anchor berth area based on AIS data

作　　者：李业[1,2] 任鸿翔 程龙岷[3] LI Ye;REN Hongxiang;CHENG Longmin(Navigation College,Dalian Maritime University,Dalian 116026,Liaoning China;Dalian Pilot Station,Dalian 116000,Liaoning China;Zhenjiang Pilot Station,Changjiang Pilot Centre,Zhenjiang 212000,Jiangsu China)

机构地区：[1]大连海事大学航海学院,辽宁大连116026 [2]大连港引航站,辽宁大连116000 [3]长江引航中心镇江引航站,江苏镇江212000

出　　处：《华中科技大学学报（自然科学版）》2023年第10期51-56,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52071312,51939001);辽宁省自然科学基金航运联合基金资助项目(2020-HYLH-29)。

摘　　要：针对锚泊船舶实际占用水域面积的快速计算和分析问题,提出一种基于船舶自动识别系统(automatic identification system,AIS)数据的船舶锚位面积计算方法.首先,对AIS轨迹数据进行集成、清洗、分段等预处理,提高数据质量;其次,使用一种基于密度的停留点识别算法识别船舶锚泊点,提取船舶锚位信息;再次,使用单调链凸包算法从船舶锚泊点中提取船舶锚位边界;最后,分别使用鞋带定理和多边形形心公式完成对锚位面积和落锚点概位的求取.实验结果表明,利用该方法得到船舶锚位面积是可行的.Aiming at the problem of rapid calculation and analysis of the water area actually occupied by anchored ships,a calculation method of ship anchor berth area based on the automatic identification system(AIS)data was proposed.Firstly,the AIS trajectory data was pre-processed with integration,cleaning and segmentation to improve the data quality.Secondly,a density-based stay point identification algorithm was used to identify the anchor points and extract the information of the ship anchor berth.Thirdly,the monotone chain convex hull algorithm was used to extract the anchor berth boundary from the ship anchor points.Finally,the shoelace theorem and the centroid formula for a polygon were used to obtain the ship anchor berth area and the approximate position of the dropped anchor,respectively.Experimental results show that it is feasible to obtain the area of anchor berths by using this method.

关 键 词：船舶锚位面积 自动识别系统(AIS)数据 轨迹预处理 停留点识别 锚位边界 

分 类 号：U652.6[交通运输工程—港口、海岸及近海工程]