Beach profile data for the Elwha River Delta, 2022-05-18

Shoreline topography data were collected using GNSS survey methods, with a differential GPS, typically an AshTech ProMark 200 RTK-DGPS system connected to the Washington State...

本次海岸线地形数据采用全球导航卫星系统（GNSS）测量方法采集，所使用的差分GPS设备通常为连接至华盛顿州的阿什泰克（AshTech）ProMark 200型实时动态差分GPS（RTK-DGPS）系统。