Harbor.Beacon Safe Water point

The National Oceanic and Atmospheric Administration (NOAA) <a href='https://www.nauticalcharts.noaa.gov/mcd/enc/' target='_blank'>Electronic Navigational Charts</a> (ENC), found in the A-16 <a href='https://www.fgdc.gov/initiatives/ngda-management-plan' target='_blank'>National Geospatial Data Asset</a> Portfolio, support real-time navigation as well as collision and grounding avoidance needs of the mariner, and accommodate a real-time tide and current display capability that is essential for large vessel navigation. The NOAA ENC will support all types of marine navigation by providing the official database for electronic charting systems, including the Electronic Chart Display and Information System. NOAA ENCs will also provide fully integrated vector base maps for use in geographic information systems that are used for coastal management or other purposes. The NOAA ENCs are in the International Hydrographic Office S-57 international exchange format and comply with the ENC product specification. The ENC Harbor map service displays data compiled for ENC products with a scale range from street level (1:5,000) to town level (1:50,000).<div><br /></div><div>The ENC data used within this application will be updated weekly. This map layer is not intended for navigation purpose.<div><div><br /></div><div><i>Thumbnail image courtesy of: </i><a href='https://creativecommons.org/licenses/by/2.0/' target='_blank'><i>Kartverket</i></a><br /></div></div></div>

美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）<a href='https://www.nauticalcharts.noaa.gov/mcd/enc/' target='_blank'>电子航海图（Electronic Navigational Charts，ENC）</a>收录于A-16号<a href='https://www.fgdc.gov/initiatives/ngda-management-plan' target='_blank'>国家地理空间数据资产（National Geospatial Data Asset，NGDA）</a>项目库，可满足航海人员的实时导航、避碰与防搁浅需求，同时支持实时潮汐与海流显示功能——该功能对大型船舶航行至关重要。该NOAA电子航海图可为各类海洋航行提供支持，作为电子海图系统（含电子海图显示与信息系统）的官方数据库。此外，NOAA电子航海图还可提供高度集成的矢量底图，供海岸带管理或其他场景下使用的地理信息系统调用。NOAA电子航海图采用国际海道测量局（International Hydrographic Office，IHO）S-57国际交换格式，并符合电子航海图产品规范。ENC港口地图服务所展示的数据为适配电子航海图产品编制的内容，比例尺覆盖街巷级（1:5000）至城镇级（1:50000）。<div><br /></div><div>本应用中所使用的ENC数据将每周更新。该地图图层并非用于导航用途。<div><div><br /></div><div><i>缩略图图片致谢： </i><a href='https://creativecommons.org/licenses/by/2.0/' target='_blank'><i>挪威海洋测绘局（Kartverket）</i></a><br /></div></div></div>