In many regions of Switzerland the wind is strong enough to be used for producing electricity. The Wind Atlas of Switzerland (www.windatlas.ch) provides information about wind speeds and directions in a raster of 100 by 100 metres and at five different heights above the ground: 50, 75, 100, 125 and 150 metres.
According to the 2050 energy perspectives, wind energy could account for around 7 to 10 percent of Switzerland's electricity consumption in the future. The cantons are responsible for planning the locations of wind power plants in that they specify where these may be constructed and where they may not. Their planning has to take account of exclusion and restriction zones, as well as the development of roads and power lines.
The calculation of wind speeds and directions is based on long-term measurements that have been incorporated into the models. Because the measurement locations do not cover the entire country and inaccuracies can occur during the modelling process, the results may vary by between +/- 0.5 and +/- 1.5 metres per second. To assess the wind conditions at a specific location, measurement on site is essential.