This polygon shapefile represents annual average wind power in the continental United States. It shows multiple values and attributes corresponding to wind power intensity. This layer can be used for analyzing wind speeds and wind density in the united states. Hart Energy Publishing. (2011). Wind Density: United States, 2008. Hart Energy Publishing. Available at: http://purl.stanford.edu/dj231sr0000 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.