미국
Cottonwood Lake Study Area-Wetland Vegetation Zones-1986
Spatial polygons of vegetation zones in 1986 for wetlands; P1, P2, P3, P4, P7, T3, T4, T5, T6, and T7 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 1986 using Stewart and Kantrud classification system.