Littlefield Lake Boundary (polygon) - Edge of water at lake-surface elevations, 1293.6 ft above NAVD 88 for main lake and 1296.9 ft above NAVD88 upstream of siltation dam
This data set consists of digital polygon coverage that defines the shoreline of Littlefield Lake 
in Audubon Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of 
Littlefield Lake in 2004.