private fun drawUserPositionMarker(location: Location) {
    val latLng = LatLng(location.latitude, location.longitude)

    if (this.userPositionMarkerBitmapDescriptor == null) {
        userPositionMarkerBitmapDescriptor = BitmapDescriptorFactory.fromResource(R.drawable.user_position_point)
    }

    userPositionMarker?.let{
        it.setPosition(latLng)
    } ?: run{
        userPositionMarker = map.addMarker(
            MarkerOptions()
                .position(latLng)
                .flat(true)
                .anchor(0.5f, 0.5f)
                .icon(this.userPositionMarkerBitmapDescriptor)
        )
    }
}