Beautiful poetic expression "wind rose" is called a strict heraldic sign-octagon - the symbol of perfection and the desire for beauty, romance of distant travels.
And in fact - it is a rigorous mathematical diagram.
History of character
The story of "Wind Rose" sign outfar into the mists of time. Initially, it was a symbol of the navigation stars in seafaring. In the northern hemisphere a fixed star in the night sky is the North Star. According to her a long time sailors have learned to determine the breadth of the place and about to determine its location in the sea. The second reference point for experienced sailors was a breeze. For many marine winds are constant at certain times of the year, and knowing these laws, the captain corrected its course and brought unmistakably a ship from a long voyage to the home port. So the character has acquired additional navigational star value and star rays began to indicate the points of the compass: north, south, east and west. Sign of the Rose of the Winds, punctured on the shoulder, was a kind of amulet for sailors. He gave them confidence in the correctness of the route and a successful return to his native land. Today tattoo is more than a symbol search path - a guiding star. The wind rose eight-point intermediate rumba north-east, south-east, north-west and south-west, the rays of shorter.
Wind rose - a sign of the meteorological situation
In addition to decorative value, a wind roseand a purely business, applied nature, carrying in itself the necessary information. First of all, in one form or another wind rose is used by meteorologists. On the orders of interested contractors, they are building a vector diagram which shows the regime prevailing winds in a certain area for a certain period of time - a month, a season, a year, long-term value. After all, knowledge of weather conditions, direction and strength of the prevailing air currents are needed in many areas of economic and social construction. it is necessary to choose the direction of runways During the construction of airfields that was less "crosswinds". In urban planning, without the wind rose can not do: we must consider where to place the industry to go out of their pipes waste is not carried with the wind in the sleeping areas where the break greenbelt as to orient the main avenues, so as not to "proskvozilo" city cold winds or on the contrary, increase the "produvaemost" in the southern regions. Unlike wind rose symbol - in diagrams rays have a different length, and their length depends on the frequency of days when the wind blows from the given direction.