func directMetersFromCoordinate(from: CLLocationCoordinate2D, to: CLLocationCoordinate2D) -> Float {

    let DEG_TO_RAD = 0.017453292519943295769236907684886
    let EARTH_RADIUS_IN_METERS = 6372797.560856

    let latutideArc = (from.latitude - to.latitude) * DEG_TO_RAD
    let longitudeArc = (from.longitude - to.longitude) * DEG_TO_RAD

    var latitudeH = sin(latutideArc * 0.5)
    latitudeH *= latitudeH

    var longitudeH = sin(longitudeArc * 0.5)
    longitudeH *= longitudeH
    let tmp = cos(from.latitude*DEG_TO_RAD) * cos(to.latitude*DEG_TO_RAD)

    return Float(EARTH_RADIUS_IN_METERS * 2.0 * asin(sqrt(latitudeH + tmp * longitudeH))) / 1000

}