National Park Service St. Croix National Scenic Riverway- Osceola Topobathy Hillshade, elevation in feet, 20191016

The U.S. Geological Survey (USGS) collected hydroacoustic data of the St. Croix River adjacent to the Osceola (WI) boat ramp for hydrographic and benthic mapping...美国地质调查局（U.S. Geological Survey, USGS）采集了毗邻威斯康星州奥西奥拉（Osceola, WI）船艇坡道的圣克罗伊河（St. Croix River）的水声数据，用于开展水文地形与底栖测绘工作……