Linked Open Data for the maritime domain

Linked Data in this data set have been compiled from diverse data sources providing information about Trade and Transport locations, protected areas, surveillance data of vessels and vessel characteristics. Data have been transformed into triples according to the vesselAI ontology, using RDF-Gen . All geometries are provided using OGC terms. The vesselAI ontology documentation is available here . In a nutshell, this data set comprises data from the following sources: 1. AIS messages of moving objects retrieved from Norwegian Coastal Administration's SafeSeaNet solution, combined with data provided by the Danish Maritime Authority. Each record contains the coordinates of the vessel, a timestamp, an identifier for the vessel, its speed and heading. Typically, each vessel reports this information by sending an AIS message every few seconds. Each reported position is also annotated with the corresponding weather conditions according to Copernicus Climate Change Service (C3S) (files: reconstructed_traj.7z, ais202101_part1.7z, ais202101_part2.7z) <br> . The weather variables currently considered as relative to the movement of vessels are: '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_dewpoint_temperature', '2m_temperature', 'mean_sea_level_pressure', 'mean_wave_direction', 'mean_wave_period', 'precipitation_type', 'sea_surface_temperature', 'total_precipitation' 2. Vessel characteristics retrieved from online sources, combined with information about departure and destination seaports. United Nations Code for Trade and Transport Locations (UN/LOCODE), has been also used, to annotate the seaports with their longitude, latitude and Well Known Text (WKT) information, as well as features and facilities available according to online sources (files: vesselsCharacteristics.7z, worldPorts.7z ). 3. Regions of interest in the maritime domain include fishing areas, endangered species habitat areas, exclusive economic zones (EEZ), Natura2000 protected areas. In this snapshot we provide Natura2000 regions (file: natura2000.7z) as well as World Protected Areas data set (file: wdpa2022.ttl.7z ) Updates and additional data sets can be found here . The surveillance and weather data in this data set, are for January 2021 and within the region defined by the degrees: #west: 2.53<br> #south: 51.50<br> #north: 60.50<br> #east: 17.50本数据集所包含的关联数据（Linked Data）源自多个异构数据源，涵盖贸易与运输枢纽信息、保护区数据、船舶监测数据及船舶属性信息。所有数据已依据vesselAI本体（vesselAI ontology）转换为RDF三元组格式，转换过程依托RDF-Gen工具完成。所有几何信息均采用开放地理空间联盟（Open Geospatial Consortium, OGC）规范术语进行表述。vesselAI本体的官方文档可在此处查阅。简言之，本数据集包含以下三类来源的数据： 1. 从挪威海岸管理局（Norwegian Coastal Administration）的SafeSeaNet平台获取的移动物体自动识别系统（Automatic Identification System, AIS）报文，结合丹麦海事局（Danish Maritime Authority）提供的配套数据。每条记录包含船舶坐标、时间戳、船舶唯一标识符、航速与航向信息。通常情况下，每艘船舶会每隔数秒发送一条AIS报文以上报此类状态信息。所有上报的船舶位置均已根据哥白尼气候变化服务局（Copernicus Climate Change Service, C3S）的气象数据集标注对应时刻的气象条件，相关数据文件包括：reconstructed_traj.7z、ais202101_part1.7z、ais202101_part2.7z。当前纳入分析的与船舶航行相关的气象变量包括：'10m_u_component_of_wind'（10米高度纬向风速分量）、'10m_v_component_of_wind'（10米高度经向风速分量）、'2m露点温度'、'2m气温'、'平均海平面气压'、'平均浪向'、'平均浪周期'、'降水类型'、'海表温度'、'总降水量' 2. 从公开网络数据源获取的船舶属性信息，结合船舶始发港与目的港的相关资料。本数据集同时采用联合国贸易与运输地点代码（United Nations Code for Trade and Transport Locations, UN/LOCODE）为各港口标注其经纬度坐标、熟知文本（Well Known Text, WKT）格式的空间信息，以及依据公开数据源整理的港口功能与配套设施详情，相关数据文件包括：vesselsCharacteristics.7z、worldPorts.7z 3. 海事领域的重点关注区域包括渔业作业区、濒危物种栖息地、专属经济区（Exclusive Economic Zone, EEZ）以及Natura2000保护区。本批次数据提供了Natura2000保护区数据集（文件：natura2000.7z）与世界保护区数据集（文件：wdpa2022.ttl.7z）。更新版本及额外数据集可在此处获取。本数据集内的船舶监测与气象数据均采集自2021年1月，覆盖区域的经纬度范围为：西经2.53°、南纬51.50°、北纬60.50°、东经17.50°