Lake Minnewashta Boundary (polygon) - Edge of water at lake-surface elevation, 1394.5 ft above NGVD 29

This data set consists of a digital polygon coverage that defines the shoreline of Lake Minnewashta in Dickinson Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Lake Minnewashta in 2004.

本数据集包含用于界定艾奥瓦州迪金森县明尼瓦什塔湖岸线的数字多边形覆盖数据（digital polygon coverage）。美国地质调查局（U.S. Geological Survey）于2004年针对该湖开展了水深测量作业。