Why can't the ocean wind direction on the meteorological line be displayed?

Wind direction and wind direction are represented by wind vanes on the weather map. The weather map is divided into ground map and high altitude map, and our daily wind is the wind on the ground map. Wind direction: expressed by vector pole, that is, F in LZ, indicating the direction of wind. The direction of the wind direction is based on the latitude and longitude lines on the map, fin. That is to say, if LZ gets a weather map, let the latitude line be horizontal, up north and down south. Then observe the wind vane, and the vertical direction of F points to the direction of wind blowing. There is a Fnrvz placed in this way on the picture, indicating that it is the north wind, and the head of F (the side with horizontal bar) points to the north (that is, upward) 395 1, indicating that the wind blows from the north, that is, the north wind blows to the south. Wind speed 39: arrow feather indicates. It's a bar on F, and the bar is long and short, and the long stroke means 4 meters & # 47; Seconds, dashes mean 2m&# 47 seconds, and a pennant means 20m&# 47; Seconds 395 1 I wonder if the explanation is clear. If you don't understand, please ask lz a detailed question.