Saturday, July 14, 2012

Windrose

A windrose displays information about the wind over a designated point in time. The windrose was used in sea travel, before magnetic compasses were invented. Currently, the windrose is used in meteorology to communicate how often the wind occurs within a given period. The windrose has eight lines, which are proportional to the frequency of the occurring wind. The center of the windrose provides the information of calm air.
The example map is of Fresno, California in 1961. The information was gathered at the Fresno Air Terminal.

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