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

I would probably just do simple division of degrees to get a position in an array or an enum value or something that would give you the text you need. Just round down on all your division. 360/16 = 22.5, so you would want to divide by 22.5 to get the position.

String[] a = [N,NNW,NW,WNW,...,NNE]

Answer 2

Wanted to use @eudoxos but needed to pull all the parts together:

def deg_to_compass(d):
  return ["N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE",
        "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW"] [math.floor(((d+(360/16)/2)%360)/(360/16))]

Borrrowed @Hristo markow to check the results:

for i in range(0,360):
  print (i,deg_to_compass(i) == wind_deg_to_str2(i))

Answer 3

I checked this and it works very good and seems accurate. Source: http://www.themethodology.net/2013/12/how-to-convert-degrees-to-cardinal.html by Adrian Stevens

    public static string DegreesToCardinal(double degrees)
    {
        string[] caridnals = { "N", "NE", "E", "SE", "S", "SW", "W", "NW", "N" };
        return caridnals[(int)Math.Round(((double)degrees % 360) / 45)];
    }

    public static string DegreesToCardinalDetailed(double degrees)
    {
        degrees *= 10;

        string[] caridnals = { "N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW", "N" };
        return caridnals[(int)Math.Round(((double)degrees % 3600) / 225)];
    }

Answer 4

I use R heavily and needed a solution for this. This is what I came up with and works well for all possible combinations I have fed it:

degToCardinal <- function(degrees) {
  val <- as.integer((degrees / 22.5) + 0.5)
  arr <- c("N","NNE","NE","ENE","E","ESE", "SE", "SSE","S","SSW","SW","WSW","W","WNW","NW","NNW")
  return(arr[((val+1) %% 16)])
}

Answer 5

This JavaScript will work for anyone who only needs 8 cardinal directions and would like corresponding arrows.

function getCardinalDirection(angle) {
    const directions = ['↑ N', '↗ NE', '→ E', '↘ SE', '↓ S', '↙ SW', '← W', '↖ NW'];
    return directions[Math.round(angle / 45) % 8];
}

Answer 6

To do the reverse conversion (compass letter abbreviations to degrees):

function getDir($b)
{

   $dirs = array('N'=>0, 'NNE'=>22.5,"NE"=>45,"ENE"=>67.5, 'E'=>90,'ESE'=>112.5, 'SE'=>135,'SSE'=>157.5, 'S'=>180,'SSW'=>202.5, 'SW'=>225,'WSW'=>247.5, 'W'=>270,'WNW'=>292.5,'NW'=>315,'NNW'=>337.5, 'N'=>0,'North'=>0,'East'=>90,'West'=>270,'South'=>180);
   return $dirs[$b];
}