미국
Cottonwood Lake Study Area-Wetland Vegetation Zones-1985
Spatial polygons of vegetation zones in 1985 for wetlands; P1, P2, P3, P4, P7, P8, T2, T3, and T8 within the Cottonwood Lake Study Area, Stutsman County, North Dakota. Created from a collection of digital orthorectified images from aerial photographs of the study area acquired during 1985 using Stewart and Kantrud classification system.