CLLocationCoordinate2D]) -> MKPolyline {

    let polyline = MKPolyline(coordinates: mapCoordinateList, count: mapCoordinateList.count)
    return polyline
}

// Create an array of coordinates from an array of locations. Used to create a route line.
func getMapCoordinates(locationList: [CLLocation]) -> [CLLocationCoordinate2D] {
    var mapCoordinates = [CLLocationCoordinate2D]()

    for location in locationList {
        let coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)

        map