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A wind atlas contains data on the wind speed and wind direction in a region. These data include maps, but also time series or frequency distributions. A climatological wind atlas covers hourly averages at a standard height (10 meter) over even longer periods (30 years). But depending on the application there are variations in averaging time, height and period.
A wind atlas is employed when pre-selecting wind farm sites. The required data include 10-minute averaged wind at heights between 30 and 100 meter over a 10 to 20 year period.