ISOTACHS

http://www.erh.noaa.gov/gsp/localdat/cases/2010/4-6FebWinterStorm/4-6FebruaryWinterStorm.html
This is an example of an isotach map. These maps display data about different wind speeds across the World. After collecting the wind speed data, a line is connected to the wind speeds of the same speed. This map displays wind speeds over the southern United States.