Calculating Average Coordinates

The logic below was taken from the site: https://carto.com/blog/center-of-points/

Where the $coordinates argument is a collection of Coordinates objects. This Coordinates class, should be something like:

 1class Coordinates {
 2    public function __construct(private float $latitude, private float $longitude)
 3    {}
 4 
 5    public function getLat(): float
 6    {
 7        return $this->latitude;
 8    }
 9 
10    public function getLat(): float
11    {
12        return $this->longitude;
13    }
14}

With this set, you can send this data to the method below to get the center of the coordinates in the collection.

 1public static function average(Collection $coordinates): array
 2{
 3    $coordinates = $slots->map(function ($coordinates) {
 4        $latitude = $coordinates->getLat();
 5        $longitude = $coordinates->getLng();
 6 
 7        return [
 8            'zeta' => sin(pi() * $longitude / 180),
 9            'xi' => cos(pi() * $longitude / 180),
10            'latitude' => $latitude,
11        ];
12    });
13 
14    $zeta = $coordinates->average('zeta');
15    $xi = $coordinates->average('xi');
16 
17    $latitude = $coordinates->average('latitude');
18    $longitude = 180 * atan2($zeta, $xi) / pi();
19 
20    return new Coordinates($latitude, $longitude);
21}