Vessel Density 2014

For the calculation of the data "AIS Vessel Density", the data of the Universal Shipborne Automatic Identification System (AIS) were evaluated with regard to various parameters and ship types under stochastic aspects. The data are requested once a year for the past year from the European Maritime Safety Agency (EMSA). Among others, the information is collected and stored for the purpose of securing maritime traffic and is used for the manufacture of products produced for navigation by the Federal Maritime and Hydrographic Agency (BSH). The data "AIS Vessel Density" represent the mean spatial density distribution of the ships. The mean spatial ship density is the current number of ships that could be expected in a defined area (grid cell) at any time during a reference period under consideration. The counting distinguishes between five types of vessels: fishing vessels, cargo vessels, tankers, passenger vessels and all vessels.
For more information, please visit:
https://gdi.bsh.de/en/data/Vessel-Density_Dokumentation_Schiffsdichte_DE.pdf

在计算“AIS船舶密度”数据集时，研究基于随机统计视角，针对各类参数与船型，对全球船载自动识别系统（Universal Shipborne Automatic Identification System，AIS）的数据开展评估分析。该数据集每年向前追溯一年，从欧洲海事安全局（European Maritime Safety Agency，EMSA）获取。此外，此类信息的收集与存储旨在保障海上通航安全，并供德国联邦海事与水文局（Federal Maritime and Hydrographic Agency，BSH）研发生产航海相关产品使用。“AIS船舶密度”数据集表征船舶的平均空间密度分布。船舶平均空间密度指的是，在指定参考时段内，任意时刻预设区域（网格单元）内的预期船舶总数。该统计维度将船舶划分为五类：渔船、货船、油轮、客船以及所有船舶。

如需了解更多信息，请访问：
https://gdi.bsh.de/en/data/Vessel-Density_Dokumentation_Schiffsdichte_DE.pdf