Power View Maps with Multidimensionel data source?

Hi, 

Does anyone know how to fit data in analysis services (Multidimensional Model - MD) so you can use Longitude/Latitude meaures in a Power View report?

I've tried to create measures of type double and use them in the longitude and latitude field areas in Power View, but it doesn't display any points at the map?

So does anyone know if you can use lon/lat with Power View on a Multidimensional Model?

Thanks.