Description: A spatial representation of natural areas. The polygons contained in this feature class were derived from data developed for two separate projects, the Shiawassee & Huron Headwaters Resource Preservation Project and Oakland County Potential Conservation/Natural Areas Report. Each feature was assigned a rank of High, Medium, or Low. Digital Landcover, orthophotography, and USGS quadrangle maps were the main sources used to identify each natural area. Data collection from the Shiawassee & Huron Headwaters Resource Preservation Project began in 1997. The data from the Oakland County Potential Conservation/Natural Areas project was collected in 2001. Key attributes include Rank and Project. "Rank" is a reflection of quality and indicates the level of priority to retain or conserve the natural state of the identified area. "Project" identifies the project from which the feature was obtained.