Phase 7 Tidal Shoreline Feature Layer

Open the Data Source: https://gis.chesapeakebay.net/ags/rest/services/Boundaries/Phase_7_Tidal_Shoreline/MapServer/0 The Phase 7 Tidal Shoreline Feature Layer is based primarily on shoreline data provided by the Virginia Institute of Marine Science Center for Coastal Resources Management, with minor modifications in six locations. In all six instances, the modifications were made using the National Oceanic and Atmospheric Administration's zero-foot sea level rise dataset. These modifications were as follows: Added the Delaware portion of the tidal Nanticoke River up to the mean higher high tidal limit; added a braided channel in the Anacostia River in Washington, D.C., at Kingman Island; widened the Anacostia River in Washington, D.C., at the Washington Navy Yard; shortened the Rappahannock River to the mean higher high tidal limit; shortened the York River to the mean higher high tidal limit; and shortened the Pamunkey River to the mean higher high tidal limit.请访问数据源：https://gis.chesapeakebay.net/ags/rest/services/Boundaries/Phase_7_Tidal_Shoreline/MapServer/0 第七阶段潮汐岸线要素图层（Phase 7 Tidal Shoreline Feature Layer）主要基于弗吉尼亚海洋科学研究所海岸资源管理中心（Virginia Institute of Marine Science Center for Coastal Resources Management）提供的岸线数据制作，仅在6处地点进行了小幅修改。上述6处修改均采用美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration）的零英尺海平面上升数据集完成，具体修改内容如下：将潮汐南蒂科克河（Nanticoke River）的特拉华州段延伸至平均高高潮潮汐界线；在华盛顿特区金曼岛（Kingman Island）处的阿纳卡斯蒂亚河（Anacostia River）内新增一条辫状河道；拓宽华盛顿特区海军造船厂（Washington Navy Yard）段的阿纳卡斯蒂亚河；将拉帕汉诺克河（Rappahannock River）岸线缩减至平均高高潮潮汐界线；将约克河（York River）岸线缩减至平均高高潮潮汐界线；以及将帕芒基河（Pamunkey River）岸线缩减至平均高高潮潮汐界线。