Converting wind direction in angles to text words

Question

I have wind direction data coming from a weather vane, and the data is represented in 0 to 359 degrees.

I want to convert this into text format (compass rose) with 16 di

Answer 1

Javascript function 100% working

function degToCompass(num) { 
    while( num < 0 ) num += 360 ;
    while( num >= 360 ) num -= 360 ; 
    val= Math.round( (num -11.25 ) / 22.5 ) ;
    arr=["N","NNE","NE","ENE","E","ESE", "SE", 
          "SSE","S","SSW","SW","WSW","W","WNW","NW","NNW"] ;
    return arr[ Math.abs(val) ] ;
}

steps

1. Given a 360 degree angle
2. Since north is between -11.25 to 11.25 we subtract 11.25 for accuracy
3. Divide the angle by 22.5 because 360deg/16 directions = 22.5deg/direction change
4. Math.abs for as negative is still north
5. Select the segment from arr from answer

Hope it helps