Reporting Services :: Plotting Longitude And Latitude With Power View From Multidimensional Source

I have a SQL 2012 SP1 environment integrated with SharePoint 2013. I have deployed a Multi-Dimensional Cube, due to the need for role playing dimensions and numerous parent-child hierarchies that can't be 'flattened' out easily, it's for this reason that we have gone multi-dimensional, rather than tabular.

The issue I now face is trying to plot the data on a map in Power View. It has to via Longitude and Latitude or easting and northing if possible. I know if I use PowerPivot, I can query the MD Cube, get my dataset and make sure the model views the lat/long as coordinates and this method works just fine - however, it involves an extra step, the end user must pre-build their query in PowerPivot before they can use the Power View maps and adhoc analysis, this can create a lot of back and forth when refining your query or performing additional 'what if' analysis.

When I create the Report Data Source in SharePoint to connect directly to the MD Cube, rather than going through Power Pivot, it's able to connect, but does not recognise the lat and long fields as Latitude and longitude, nor will it let me manually drag it into the lat and long fields on the field list. If I drag them into the 'location' section, it does not plot correctly.

How to get Power View to plot Latitude and Longitude from a Multi-Dimensional Source without having to go through PowerPivot?