The actual wind resource on your site will vary depending on topography and structure interference. And a localized site with good winds, such as a ridgetop, may not show up on the maps. Also, most wind maps are based very few data points, so the data is not necessarily accurate for locations between measuring points.  You should also be careful with wind measurements from airports because airports are often located in lower wind areas to protect aircraft.

If you need to have a firm understanding of your wind resource then you should consider performing a wind study.  We provide the equipment and analysis services to accomplish this task.