Display list of coordinates / annotation correctly inside a map

MKMapView+FitCoords.swift

public extension MKMapView {
    public static func visibleRect(for coords: [CLLocationCoordinate2D]) -> MKMapRect {
        return coords.reduce(MKMapRectNull) { outRect, coord in
            let point = MKMapPointForCoordinate(coord)
            let rect = MKMapRectMake(point.x, point.y, 0.1, 0.1)
            let union = MKMapRectUnion(rect, outRect)

            return union
        }
    }

    public func fitCoordinates(_ coords: [CLLocationCoordinate2D],
                               animated: Bool = true,
                               insets: UIEdgeInsets = UIEdgeInsets(top: 25, left: 25, bottom: 25, right: 25)) {
        let rect = MKMapView.visibleRect(for: coords)
        self.setVisibleMapRect(rect, edgePadding: insets, animated: animated)
    }
}

// Usage: map.fitCoordinates([coord1, coord2, coord3])