Water Level Constituent Stations

Water Level Constituent Stations This feature layer, utilizing National Geospatial Data Asset (NGDA) data from the National Oceanic and Atmospheric Administration, displays the Center for Operational Oceanographic Products and Services (CO-OPS) locations of removed and presently operating water level stations, in the United States and elsewhere, at which harmonic constituents have been generated and accepted. According to NOAA, “There are hundreds of periodic motions of the Earth, Sun, and Moon that are identified by astronomy. Each of these motions or “constituents” in a set of harmonic constants is a mathematical value describing the effect that cyclical motion of the Earth, Sun, Moon system has on the tides.” Kodiak Island (ID: 9457292) & Sitkalidak Island Gps Tide Buoy (ID: 9457512) Data currency: This cached Esri federal service is checked weekly for updates from its enterprise federal source (Waterlevel Constituent Stations) and will support mapping, analysis, data exports and OGC API – Feature access. NGDAID: 178 (Sea Level Trends: Sea Level Variations of the United States Derived from National Water Level Observation Network Stations) OGC API Features Link: (Water Level Constituent Stations - OGC Features) copy this link to embed it in OGC Compliant viewers For more information: Harmonic Constituents - Station Selection; Tides & Currents Products For feedback please contact: [e-mail] NGDA Data Set This data set is part of the NGDA Water - Oceans & Coast Theme Community. Per the Federal Geospatial Data Committee (FGDC), Water - Oceans & Coast is defined as “features and characteristics of salt water bodies (i.e. tides, tidal waves, coastal information, reefs) and features and characteristics that represent the intersection of the land with the water surface (i.e. shorelines), the lines from which the territorial sea and other maritime zones are measured (i.e. baseline maritime) and lands covered by water at any stage of the tide (i.e. Outer Continental Shelf ), as distinguished from tidelands, which are attached to the mainland or an island and cover and uncover with the tide.” For other NGDA Content: Esri Federal Datasets水位成分站（Water Level Constituent Stations） 本要素图层采用美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）的国家地理空间数据资产（National Geospatial Data Asset, NGDA）数据，展示了美国及全球范围内已生成并获批谐波成分的在运营及已退役的海洋作业产品与服务中心（Center for Operational Oceanographic Products and Services, CO-OPS）所辖水位站点位。 据NOAA官方说明：“天文学已识别出地球、太阳与月球的数百种周期性运动。谐波常数集中的每一项运动或‘成分’，均为描述地日月系统周期性运动对潮汐产生影响的数学数值。” 示例站点包括：科迪亚克岛（ID：9457292）与西特利达卡岛GPS潮汐浮标站（ID：9457512） 数据时效性说明：本缓存Esri联邦服务每周将从其企业联邦数据源（水位成分站）进行更新校验，可支持制图、分析、数据导出及OGC API - 要素访问功能。 NGDA编号：178（海平面趋势：基于国家水位观测网站点的美国海平面变化） OGC API要素链接：（水位成分站 - OGC要素），请复制该链接以嵌入符合OGC标准的查看器中 更多相关信息：谐波成分 - 站点选择；潮汐与海流产品 反馈渠道：如有反馈请联系：[e-mail] NGDA数据集归属：本数据集隶属于NGDA水域-海洋与海岸主题社区。根据联邦地理空间数据委员会（Federal Geospatial Data Committee, FGDC）的定义，水域-海洋与海岸范畴包括：“咸水体的要素与特征（如潮汐、潮汐波、海岸信息、珊瑚礁），以及表征陆地与水面交界面的要素与特征（如海岸线）、测算领海及其他海洋区域的基准线（如海洋基线），以及潮汐任意阶段被水覆盖的陆地（如外大陆架）；该范畴与附着于大陆或岛屿、随潮汐涨落而淹没或裸露的潮间带存在明确区分。” 其他NGDA相关内容：Esri联邦数据集