Wind power density is important in wind energy because it determines the amount of energy that can be harnessed from the wind at a particular location. It is a crucial factor in determining the feasibility and efficiency of wind energy projects. Because the motion is both the source of the energy and the means of its transport, the efficiency of wind power extraction is a. This layer displays the mean wind power density from the Global Wind Atlas version 4 at 250 meter resolution and 5 heights: 10, 50, 100, 150, and 200 meters, based on data from the World Bank Group and DTU Energy. 2) W/m2, respectively; of onshore wind farms outside of Europe are simi- – larly 20. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity.